Mercedes Benz Truck R 320 BLUETEC Technical S-83_55-87F Date: 090310 A/C - Various Compressor Noise With A/C ON Date: March 10, 2009

Mercedes Benz Truck R 320 BLUETEC Technical S-83_55-87F Date: 090310
A/C - Various Compressor Noise With A/C ON
Date: March 10, 2009
Order No.: S-B-83.55/87f
Supersedes: S-B-83.55/87e dated Nov. 20, 2008
Group: 83
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Revision History
SUBJECT
Replacement of Refrigerant Compressor Belt Pulley Due to Noise Complaints If you receive customer reports in the above model vehicles of noises
at the refrigerant compressor with air conditioning activated and deactivated, the cause could be a defective belt pulley or belt pulley bearing. The
pulley and pulley bearing can be diagnosed and replaced with the compressor still installed in the vehicle by following the procedures below.
1. Locate the noise by duplicating the conditions under which the complaint occurred.
2. If there is also a cooling performance complaint, the noise could be caused by low refrigerant level, perform a Refrigerant Circuit Test as per SDS
and follow instructions for corrective actions.
3. Before the belt pulley on the refrigerant compressor is replaced, verify that the following components in the belt drive are not the source of the
noise and repair as required.
^ Alternator
^ Power steering pump
^ Guide pulleys / tensioner pulleys
^ Water pump
4. If there is a whining noise that is RPM-dependant which is present with the air conditioning on AND off and is determined to be caused by the
tensioner pulleys, guide pulleys or refrigerant compressor, continue with step 5.
Note:
Make sure that the AC is SHUT OFF! On the push button unit, select "AC off" then "OFF" to turn the Climate System off, then select climate system
on. The compressor should now be off. To see more details on the various push button units, please refer to the climate book, section 2.1 for each
model.
Engines M112/113/272/273
5. Remove the poly-V-belt from the refrigerant compressor.
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6. Install shorter belt to bypass the compressor. Route belt as shown in Figure 1.
Engines M112/113 - 20 x 2315 to 2325 mm (A011 997 86 92 or A 011 997 96 92)
Engines M272/273 - 20 x 2330 to 2340 mm (A011 997 04 92)
Note:
A short test belt for OM642 is currently not available.
Note:
The belts can be sourced locally or by MB part number. The belts must be purchased to diagnose AC compressor pulley noise and are not to be
submitted on a warranty claim.
7. Run the engine with the short belt installed. If the noise is still present, check whether the tensioner and/or guide pulleys are the source of the
noise. Replace as necessary the defective tensioner and/or guide pulleys.
8. If the noise is no longer present, allow the engine to cool and proceed to step 10.
9. Replace the compressor pulley as follows.
Note:
It is not necessary to remove the compressor or evacuate the refrigeration circuit. Refer to WIS document AR83.55-P-7685B
10. Remove the pulley-V-belt. Determine if the diameter of the pulley is 100 mm or 110 mm.
11. Raise the vehicle and remove the lower engine compartment paneling.
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12. Refer to Figure 2 for component number references. Remove the belt pulley circlip (Figure 2, Part 6). With plastic belt pulleys, it is possible to
insert a screwdriver under the circlip (Figure 2, Part 6) and pry it out of the groove.
13. Remove hub (Figure 2, Part 1) using a socket and counter hold tool W112 589 07 40 00. Use a small magnet to remove flat washer from shaft.
Note:
There are two versions of the compressor shaft, a 7mm hex and one with two flats. The shaft with two flats requires the use of socket W112 589 02
09 00. To loosen 7mm hex head, ensure that proper METRIC tool is utilized. To loosen the pulley:
Warning!
It is not a left hand thread!
Method A (Preferred and shown in picture above): Hold the compressor shaft stationary and turn the drive hub counter clockwise to loosen (Figure
3a). Turn the hub clockwise to tighten.
Method B: Hold the drive hub stationary and turn the compressor shaft clockwise to loosen. Turn counter clockwise to tighten.
14. Remove snap ring (Figure 2, Part 4) for pulley bearing.
15. Remove belt pulley (Figure 2, Part 2) from the end of compressor housing.
Note:
Do not apply a pulling force in an axial direction to the refrigerant compressor shaft.
Components damaged due to improper repair procedures may be subject to debit.
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Assemble the rubber dampers (Figure 2, Part 5) into new pulley the as shown in example A in Figure 4 and Figure 5. Make note of the direction of
the curvature of the rubber dampers and install them over the reinforcing webs in the pulley, not in the spaces between the webs.
16. Install new belt pulley (Figure 2, Part 2) onto the end of compressor housing. Make sure it is the same diameter as the original, 100 mm, 110
mm.
17. Install the snap ring (Figure 2, Part 4) for pulley bearing with its flat side facing the refrigerant compressor. Make sure the snap ring is seated
correctly in the groove.
Note:
Use snap ring pliers with 90?tips that have a minimum reach of 19 mm (0.75").
18. Install washer (Figure 2, Part 3). Make sure it is flat against the shoulder of the shaft.
19. Install hub (Figure 2, Part 1) so the drive fingers are inserted into the gaps between the ends of the rubber dampers. Screw the hub onto the
compressor shaft clockwise and torque to 35 nm. The hub continues to tighten when in the compressor is in operation.
20. Install circlip (Figure 2, Part 6) into the belt pulley. Make sure it is seated in the groove of the pulley.
21. Install a new standard length poly-V-belt. Start engine and verify correct belt operation.
22. Install lower engine paneling.
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Special Tools
Parts Information
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on
November 20, 2008. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.
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In Case of Warranty, use the table above.

Mercedes Benz Truck R 320 BLUETEC Technical P-40_15-53A Date: 090318 Tire Monitor System - Service Precaution Date: March 18, 2009

Mercedes Benz Truck R 320 BLUETEC Technical P-40_15-53A Date: 090318
Tire Monitor System - Service Precaution
Date: March 18, 2009
Order No.: P-B-40.15/53a
Supersedes: P-B-40.15/53, October 2005
Group: 40
Revision:
Revised for All Models with TPMS and for One Time Use of Aluminum Valve Assembly.
SUBJECT:
MY-All, Models All with TPMS
Notes on Tire Mounting/Dismounting with Tire Pressure Monitoring Systems
Please note that improper tire replacement (mounting/dismounting) may affect the functionality of the tire pressure monitoring wheel sensor and/or it
may be damaged mechanically
This can lead to a tire pressure monitoring system failure. The wheel sensor must be replaced as a result.
Note:
In order to avoid damages these instructions must be strictly observed:
The components from the various suppliers are not compatible with one another. In the case of incorrect or mixed fitment of individual components
(such as wheel sensors) the tire pressure monitoring system will no longer function.
It is therefore critical that when replacing a wheel sensor and/or tire that only wheel sensors of the respective system manufacturer and the correct
frequency are used.
As a rule damage caused during assembly operations is not recognized immediately. Therefore a visual inspection of the wheel sensors in particular
after dismounting the tires is critical. Based on this fact it is essential to observe the following information during the tire mounting and dismounting
process.
Note:
Damaged Sensors cannot be claimed under warranty.
Identification of wheels with tire pressure monitoring sensors:
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For mounting the wheel sensors Mercedes-Benz uses a tire inflation valve made from aluminum (A) in place of a steel valve (B) or rubber valve (C).
(Figure 1)
Note:
Aluminum valve stems can only be used once and must be replaced in their entirety when changing wheels and/or sensors.
A - Aluminum valve (Tire Pressure Monitoring)
B - Steel valve
C - Rubber valve
Note:
Replacement sub-components, such as nuts, gaskets, seals, spacers, or o-rings must not be used. The valve stem assembly must be replaced in its
entirety.
Mounting/Dismounting Process:
When replacing tires with wheel sensors (tire pressure monitoring system) it is essential to observe the following instructions.
Disassembly:
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Warning!
The bead breaker shovel of the tire mounting device must not be positioned in the valve area (1). This applies both to the outside and inside of the
tire. (Figure 2)
Disassembly
The bead breaker shovel must be positioned opposite the valve area (1-Figure 3).
Possible causes for wheel sensor damage when disassembling tires When disassembling the tire, the assembly head of the tire mounting device and
assembly lever must not be positioned in the valve area (1- Figure 4) and not on the inbound side as well.
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The increased bead cable forces of the tire press on the wheel sensor (3-Figure 5) and can damage the sensor.
The increased bead cable forces of the tire can break the wheel sensor in the visible area (2-Figure 6) and/or on the bottom side.
Disassembly and assembly
When disassembling the tire, position the assembly head of the tire mounting device approx. 15 cm behind the valve (1-Figure 7) in the direction of
rotation (arrow).
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When assembling the tire, position the assembly head of the tire mounting device opposite the valve (1-Figure 8).
The wheel sensor (3-Figure 9) must not be treated with tire assembly paste or soapy water.
The assembly aid (tire paste or soapy water) may only be coated on the rim flange and the tire bead as otherwise these penetrate the wheel sensor and
may impair the functionality. Both components should always only be lightly treated.

Mercedes Benz C 300 4MATIC # P-20_20-35 Date: 091028 Cooling System - Radiator Accident Repair Information Date: October 28, 2009

Mercedes Benz C 300 4MATIC # P-20_20-35 Date: 091028
Cooling System - Radiator Accident Repair Information
Date: October 28, 2009
Order No: P-B-20.20/35
Group: 20
SUBJECT:
MY-All, Model 204.0 /2, /9 and Models 207.3 and Models 212.0
Radiator Accident Repairs
Cooling Module Components
If a radiator remains functional and airtight it is not necessary to replace it for:
^ Radiator fin marks*, or
^ Bottom left and right broken radiator mounting brackets.
* Fin marks must not have any effect on or compromise radiator function. Therefore, in addition to visual inspection, the radiator cooling
  190
performance must be assessed.
In the event of a broken off or damaged radiator mounting bracket at the bottom, the retaining clamp A 204 504 05 14, can be used to repair the
radiator.
The repair can be conducted on radiators with the following part numbers:
Parts Information

Mercedes Benz Truck R 320 BLUETEC Technical T-54_21-220 Date: 090508 Body Controls - Rear Lamp Out Mssg/Multiple Codes Set Date: May 8, 2009

Mercedes Benz Truck R 320 BLUETEC Technical T-54_21-220 Date: 090508
Body Controls - Rear Lamp Out Mssg/Multiple Codes Set
Date: May 8, 2009
Order No.: T-B-54.21/220
Supersedes:
Group: 54
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SUBJECT:
Model 164.125/156/172/177/186/825/871/886, Up to VIN A490836
Model 251.125/156/165, Up to VIN A096091
Equipped with SA code 809 (Model Year 2009)
Rear Lamp Out Message(s) in Instrument Cluster But No Failures Exist
If you receive customer reports in the above model vehicles of a rear lamp out message in the instrument cluster but no bulb failures exist, this may
be due to a software issue in the rear SAM. This issue will only occur under all the following conditions:
^ Rear SAM with s/w version A164 442 38 00
^ Any one of the fault codes listed above present in the Rear SAM but no bulb failure exists
To resolve, using SDS version 03/09 or later, flash the rear SAM via menu path: Control units --> Body --> Rear SAM --> Control unit adaptations
--> Control module programming
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on
May 8, 2009. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.
In Case of Warranty, use the table above.

Mercedes Benz Truck R 320 BLUETEC Technical S-32_22-78A Date: 090506 Suspension - Visit Workshop Mssg/DTCs 5320/5250/5260 Date: May 6, 2009

Mercedes Benz Truck R 320 BLUETEC Technical S-32_22-78A Date: 090506
Suspension - Visit Workshop Mssg/DTCs 5320/5250/5260
Date: May 6, 2009
Order No.: S-B-32.22/78a
Supersedes: S-B-32.22/78 dated March 31, 2009
Group: 32
Revision History
Revision Date Purpose
a 5/6/09 WIS Document Reference Added (211.2)
- 3/31/09 Initial issue
SUBJECT:
All Model 164, 211, 219, 221 and 251 Vehicles Equipped with Airmatic
Suspension (Sales Code 489)
"Airmatic - Visit Workshop" Displayed Within Instrument Cluster
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If you receive customer reports in the above model vehicles of "Airmatic Visit Workshop" being displayed within the instrument cluster and the
respective fault code listed below, perform the following.
Note:
Do not unplug the connector at the drain valve, as it is necessary to inspect the harness connector and compressor in their original untouched state.
1. Cut the drain valve wire harness 10 cm before connector.
2. Install the new wire harness repair kit.
3. Replace the Airmatic compressor. Refer to the applicable WIS document.
Note:
This condition is the result of excessive resistance at the connector of the Airmatic compressor's drain valve.
Parts Information
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on
March 31, 2009. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.
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In Case of Warranty, use the table above.

Mercedes Benz Truck R 320 BLUETEC Technical S-83_30-74P Date: 090604 A/C - Musty/Moldy Odor Issues Date: June 4, 2009

Mercedes Benz Truck R 320 BLUETEC Technical S-83_30-74P Date: 090604
A/C - Musty/Moldy Odor Issues
Date: June 4, 2009
Order No.: S-B-83.30/74p
Supersedes: S-B-83.30/74o dated April 29, 2009
Group: 83
Revision History
SUBJECT:
All Model 164, 171, 203, 204, 209, 211, 215, 216, 219, 220, 221, 230 and 251 Vehicles
Air Conditioning Musty/Moldy Odor Complaints
Under certain environmental conditions, typically in a hot and humid climate, the vehicle may emit a musty/moldy odor from the air conditioning
system. This may be more noticeable when starting the vehicle due to residual condensation on the evaporator and on the interior surface of the
heater box.
If you receive customer reports in the above model vehicles regarding a musty/moldy odor from the air conditioning system, the evaporator should
be cleaned using Mercedes-Benz Contra Sept and the interior using the "ultrasonic atomizer", refer to WIS document AR83.30-P-5556A. For the
best lasting results, follow the instructions provided below.
1. Remove all filters installed in the air conditioning system. The following filter may be fitted: Pollen filter, dust filer, combination filter or active
charcoal filter.
2. Clean evaporator with Mercedes-Benz Contra Sept as per WIS document AR83.30-P-5555T.
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Contra Sept is applied using a spray gun attached to a long probe. It is imperative to have as much of the evaporator sprayed with the cleaner by
moving the probe in / out and up / down inside the case. It may be necessary to bend the probe in order to gain access. The cleaner is applied and
allowed to dry. Refer to Figure 1a for spraying angle recommendation.
Note:
After cleaning the evaporator, a second treatment has to be conducted. After completion of section A (ContraSept), refer to section B (Wynns).
Parts Information
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on
June 4, 2009. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.
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In Case of Warranty, use the table above.
A. ContraSept Cleaning Procedure
A. ContraSept Cleaning Procedure:
Caution!
Wear safety glasses and respiratory protection when spraying cleaner.
^ Spray the evaporator in a 90° angle.
^ Move up and down, left and right to reach all areas of the evaporator
^ Do not rotate the probe to reach other areas of the evaporator. This will change the spraying angle and the cleaning effect will diminish.
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Warning!
Do not exceed the manufacturer's recommended maximum air pressure as stated on the label affixed to the pressure cup (Figure 1b). Excessive air
pressure could cause the canister to explode and potentially cause personal injury. The recommended pressure to clean the evaporator effectively is
120psi.
To reduce the possibility for this condition to reoccur, advise the owner to operate the blower at a higher speed, especially during humid conditions.
For vehicles with a REST function, it also helps to use this feature during humid conditions when parking the car.
Additional Procedures - Model 203 / 209
1. Equipped with ACC climate system Option Code 580 - It is necessary to drill a 15mm hole in the climate housing to access the evaporator with
the spray probe. The location for drilling the hole is described in WIS document AR83.30-P-5555-01A and Figure 1, A1 and B1.
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2. A white foam block may be mounted to the housing between the blower motor and the main section of the case, see (Figure 2). On these housings,
there is an alternate location of the hole as shown in Figure 1, A2 and B2.
Figure 3 - bend probe as shown
3. Bend the shorter of the two probes (Figure 3). Move the probe up and down as well as side to side to ensure the entire evaporator is sprayed with
the cleaner. Plug hole after cleaning with seal plug A110 987 10 44 64.
4. Using the instructions below check the "REHEAT" setting. It should be set to "Anti-icing". Control Units --> Body --> EIS --> Control unit
adaptations --> Read coding and change if necessary --> Climate control Standard setting: Climate control --> REHEAT mode --> Change From:
"Standard" to: "Anti-icing protection"
5. In case of customer reports that the air conditioning system is emitting a musty/moldy odor from the vents within three months after using the
Mercedes-Benz Contra Sept product as described above, a Biocide coated evaporator entered production as of VIN A731368 and F634900 (203)
and F144091 and T042954 (209). In this case, this part can be installed in earlier vehicles. Be sure to thoroughly clean the inside of the heater box
and make sure the drain tubes are not clogged before reassembling the system.
Additional Procedures - Model 211
1. Using the instructions below check the "REHEAT" setting. It should be set to "Fixed value". Control Units --> Air Conditioning --> C-AAC,
AAC --> Control unit adaptations --> Read coding and change if necessary --> Workshop coding --> Evaporator-Control (REHEAT mode) -->
Change From "Humidity-dependent (SERIES)" To: "Fixed value"
2. In case of customer reports that the air conditioning system is emitting a musty/moldy odor from the vents within three months after using the
Mercedes-Benz Contra Sept product as described above, a new slanted heater box bottom which allows the condensation to drain better and a coated
evaporator entered production as of VIN A675828 and X171590. In this case, these parts can be installed in earlier vehicles. Be sure to thoroughly
clean the inside of the heater box and make sure the drain tubes are not clogged before reassembling the system.
Note:
Replacement of the heater box bottom and evaporator on the 211 and replacement of the evaporator on the 203 and 209 can only be claimed if the
Mercedes-Benz Contra Sept treatment has already been performed. Dealers must claim which option was performed in the text of the claim.
Procedure for 164 and 251
Caution!
Wear safety glasses and respiratory protection when drilling hole and spraying cleaner.
1. Clean the evaporator with MercedesBenz Contra Sept as per WIS document AR83.30-P-5555T and the additional information in this document.
2. To clean the driver side of the evaporator, the spray probe is inserted into the hole for the evaporator temperature sensor as described in WIS
document AR83.30-P-5555T, Step 4.1.
3. To clean the passenger side of the evaporator, the spray probe is inserted into a 15 mm hole that needs to be drilled in the climate housing as
described in Steps 4 through 6.
4. Remove the cover below the instrument panel on the passenger side and fold carpet down. Refer to WIS document AR68.10-P-1520GZ (164) or
AR68.10-P-1520RT (251).
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5. Location of hole is shown in Figures 4 and 5. The hole should be centered in the triangular shaped section of the climate housing as shown in
Figure 5.
6. Drill a 15mm hole in small increments using a mechanical drill stop to limit how far the drill bit penetrates the climate housing. A collar type drill
stop, a piece of rubber hose or tape can be used as the drill stop.
Warning!
The drill bit cannot be allowed to penetrate the housing more than 13mm or damage to the evaporator could occur. When the drill bit breaks through
the housing it has a tendency to pull inward. This is why a drill stop is necessary.
7. Bending of the probe may be required to be able to spray all parts of the evaporator. Move the probe up and down as well as side to side to ensure
the entire evaporator is sprayed with the cleaner.
8. Follow the remainder of instructions in WIS document AR83.30-P-5555T. Reassemble vehicle in reverse order. Do not replace any filter back
into the system!
Warning!
Do not exceed the manufacturer's recommended maximum air pressure as stated on the label affixed to the pressure cup (Figure 3). Excessive air
pressure could cause the canister to explode and potentially cause personal injury.
B. Wynns Treatment
B. Wynns Treatment
1. Warm up vehicle with air conditioning switched off for a minimum of 30 minutes in order to dry out the climate housing and ducts. Set the climate
control to the following settings:
Blower speed 2-3
Heat to maximum
Recirculation activated
Air distribution to the footwell
All doors, windows and sliding roof closed
Note:
AC compressor does not turn off immediately when the AC Off is selected at the control module. In order to ensure the compressor is off, use the
following instructions:
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Select AC Off
Select Climate System Off
Select Climate System On. The AC compressor will now be off.
2. Remove all filters installed in the climate system. This could include dust, activated charcoal or combination filters.
3. Close the recirculation flap for cleaning using SDS.
For 171, 204, 211, 219, 216, 221, 164 and 251 models follow path: Control Units --> Air Conditioning --> C-AAC, AAC --> Actuations --> Closing
air recirculation flap for cleaning --> Select recirculation.
For 203 and 209 models, follow path: Functions performed by more than one control unit --> Body --> Climate control --> Climate control -->
C-AAC --> Actuations
The system will come out of recirculation when SDS is disconnected from the vehicle.
Note:
This menu item is not available in SDS for all vehicles. On these vehicles, recirculation must be manually selected on the control module.
4. Place the Wynn's(R) AIRCOMATIC(TM) Ultrasonic Cleaning System in the passenger footwell. Insert the hose in the luggage net and orient the
end of the hose to insure the output from the device is sucked into the footwell vents.
5. Start engine, AC off, press recirculation button, select lowest blower speed and set the temperature(s) to minimum.
Note:
The compressor must not be running.
6. Install one container of Wynn's(R) AIRCO-CLEAN(TW) in the Wynn's system.
7. Plug in the Wynn's system and check that it is running.
8. Close all doors and windows.
9. When the fog stops coming out of the Wynn's(R) system (after approximately 20 minutes), the dispersion process has been completed.
10. When the cleaning procedure is finished, switch engine off, turn off the Wynn's(R) system and leave windows and doors closed for
approximately 1 hour.
11. Open doors and trunk lid/tailgate.
12. Open the air recirculation flap again if the automatic recirculation function has been deactivated by coding, and set the recirculated air function
to "unimited" again.
13. Restart engine, switch on A/C, select the highest blower speed and set the temperature(s) to minimum.
14. Allow system to run for about 10 minutes. The cleaning process is now complete.
15. After cleaning, install new filters.
16. If cleaning the interior does not remedy the complaint, please refer to the following documents: SI83.00-P-0004A and SI83.30-P-0008A.
To reduce the possibility for this condition to reoccur, advise the owner to operate the blower at a higher speed, especially during humid conditions.
For vehicles with a REST function, it also helps to use this feature during humid conditions when parking the car.

Mercedes Benz Truck R 320 BLUETEC Technical S-46_50-34A Date: 090204 Steering - Speed Sensitive Steering Malfunctions/DTC's Date: February 4, 2009

Mercedes Benz Truck R 320 BLUETEC Technical S-46_50-34A Date: 090204
Steering - Speed Sensitive Steering Malfunctions/DTC's
Date: February 4, 2009
Order No.: S-B-46.50/34a
Supersedes: P-B-46.50/34 dated March 27, 2006
Group: 46
Revision History
Revision Date Purpose
a 2/4/09 Applicable Models Updated. Content Revised, Parts and Warranty Info. Updated
- 3/27/06 Initial issue
SUBJECT:
Models 164, 171, 203, 209, 211, 215, 216, 219, 220, 221, 230, 251 with code 213 (Speed Sensitive Power Steering - Parameter Steering)
Speed Sensitive Power Steering (Parameter Steering) Malfunction
If you receive customer reports in the above model vehicles of malfunctioning Speed Sensitive Power Steering (Parameter Steering), this may be due
to the following causes.
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1. Speed sensitive power steering valve, electrical malfunction.
2. Electrical connection on speed sensitive power steering valve damaged or broken.
As a result, the fault codes above may be stored in the ESP control unit.
To resolve issues, replace the speed sensitive power steering valve with a new part as per the below procedure.
Note:
It is not necessary to replace the entire rack-and-pinion steering system.
1. Remove steering gear as per respective WIS document shown above.
2. Remove loose dirt from steering gear and clean area around speed sensitive power steering valve. Do not use any cleaning agents!
Important!
Ensure that the utmost cleanliness is maintained at the work area during the following steps!
3. Unscrew bolts (Figure 1, 2) attaching speed sensitive power steering valve (Figure 1, 1).
4. Replace the speed sensitive power steering valve (Figure 1, 1). Ensure that the new sealing ring is seated properly. Attach speed sensitive power
steering valve (Figure 1, 1) by screwing in bolts (Figure 1, 2), observe torque (5 Nm +/- 0.3 Nm).
5. Install steering gear, refer to the respective WIS document as stated in Step 1
Note:
There are two versions of power steering high pressure lines that must be detached when removing steering gear. The earlier version has a slotted
support ring, which can be replaced individually. The new version does not have a slotted support ring. In this case, the complete power steering
high pressure line must be replaced (see parts list).
6. Check steering for leaks.
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7. Check speed sensitive - parameter function using the DAS, read out fault memory and erase if necessary.
A toe adjustment after removing/installing the steering gear is no longer necessary according to the latest findings (refer to the latest version of the
DTB P-B-46.20/28).
Note:
Always refer to EPC for the latest information on parts.
Parts Information
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on
February 4, 2009. Please refer to Netstar --> Star Teklnfo --> Star Time for the most current labor time allowance.
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In Case of Warranty, use the table above.

Mercedes Benz Truck R 320 BLUETEC Technical S-91_40-130A Date: 090319 Restraints - Seat Belts Don't Retract Properly Date: March 19, 2009

Mercedes Benz Truck R 320 BLUETEC Technical S-91_40-130A Date: 090319
Restraints - Seat Belts Don't Retract Properly
Date: March 19, 2009
Order No.: S-B-91.40/130a
Supersedes: P-B-91.40/130 and T-B-91.40/131 dated October 11, 2006
Group: 91
Revision History
Revision Date Purpose
Mercedes Benz Truck R 320 BLUETEC Page a 3/19/09 Parts Information Updated
- 10/11/06 Initial issue
SUBJECT:
All Model 164, 171, 203, 209, 211, 219, 220, 221, 230 and 251
Seat Belt Does Not Roll Up Correctly
If you receive customer reports in the above model vehicles of the front or rear seat belts not rolling up fully, the cause could be dirt deposits on the
seat belt guide due to a soiled seat belt. Cleaning the belt guide and seat belt should restore proper function of the seat belt retraction.
To resolve, perform the following.
1. Clean the belt guide using MB Plastic Cleaner (Figures 1 and 2).
2. Clean the seat belts using MB Car Shampoo mixed with water, MB Textile Carpet/Fabric Care or clean, lukewarm water and soap. Do not treat
the belt with any other cleaning agents.
3. Extend belt and allow to air dry. Do not dry at temperatures above 175°F (80°C) or in direct sunlight. Do not bleach or dye.
Note:
If these instructions are not followed, proper retraction of the seat belt may be impaired.
Note:
This repair cannot be claimed under warranty.
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Parts Information

Mercedes Benz Truck R 320 BLUETEC Technical T-72_20-106 Date: 090223 Body - Liftgate Won't Open Fully/Hydraulic Pump Operates Date: February 23, 2009

Mercedes Benz Truck R 320 BLUETEC Technical T-72_20-106 Date: 090223
Body - Liftgate Won't Open Fully/Hydraulic Pump Operates
Date: February 23, 2009
Order No.: T-B-72.20/106
Supersedes:
Group: 72
SUBJECT:
Model 164.122/125/172/175/177/186/822/825/871/886, Up to VIN A448514
Model 251.122/125/156/165/175/177, Up to A059807
Equipped with Code 890
Hydraulic Pump Operates but Rear Door Does Not Open Fully
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If you receive customer reports in the above model vehicles where the rear door does not open or does not fully open, this may be caused by a leaky
hydraulic pump or dirt particles in the pump. If the pump is leaking fluid or has dirt particles, replace the pump (Figure 1, 1).
Note:
The hydraulic pump is available separately as a replacement part.
Parts Information
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on
February 23, 2009. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.
In Case of Warranty, use the table above.

Mercedes Benz Truck R 320 BLUETEC Technical S-82_70-475A Date: 090320 Cell Phone - Calls Dropped Or Cut Off Date: March 20, 2009

Mercedes Benz Truck R 320 BLUETEC Technical S-82_70-475A Date: 090320
Cell Phone - Calls Dropped Or Cut Off
Date: March 20, 2009
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Order No.: S-B-82.70/475a
Supersedes: P-B-82.70/475 dated Nov. 14, 2005
Group: 82
Revision History
Revision Date Purpose
a 3/20/09 Applicable Models Updated
- 11/14/05 Initial issue
SUBJECT:
All Passenger Car and Light Truck Models
Telephone Calls Being Cut Off or Dropped
If you receive customer reports in the above model vehicles for telephone calls being dropped or disconnected even with adequate signal strength,
please read the below information on possible causes.
1. Dead Zones - Depending on the location and the respective network provider, 100% network coverage may not be present. Network coverage can
vary at the same location depending on the network provider. When crossing from an area with network coverage to an area without network
coverage, reception may drop to zero and the call may be cut off, even though the phone or head unit may still continue to show signal strength.
There are many things that can diminish "dead zones" and weather is a large contributor.
2. Switching Cells - While driving, the telephone transfers from network cell to the next network cell. Sometimes switching between cellular towers
can also cause calls to be dropped. This can be fixed by the customer's service provider (Verizon, Sprint, Alltel, Cingular, T-Mobile, etc.). If
customers experience dropped calls on a regular basis along the same route, they should take note of the cross streets or address and contact their
service provider and describe where the drops are taking place and time of day.
3. Cells Operating at Full Capacity - While driving, the telephone transfers from network cell to the next network cell. Each cell can only process a
maximum number of calls. If the vehicle with an active call transfers to a cell operating at full capacity, the cell cannot handle the call and it will be
dropped. The call is cut off even though the head unit and/or telephone may be showing full signal strength and anywhere from 1 to 5 bars.
These are network problems and not related to the vehicle; replacing components will NOT resolve the complaint.

Mercedes Benz Truck R 320 BLUETEC Technical T-54_10-216 Date: 090308 Electrical - Simplified Battery Replacement Date: March 8, 2009

 Mercedes Benz Truck R 320 BLUETEC Technical T-54_10-216 Date:
090308
Electrical - Simplified Battery Replacement
Date: March 8, 2009
Order No.: T-B-54.10/216
Group: 54
SUBJECT:
MY- All, Models 164 and 251
Simplified Battery Replacement
Be advised that it is no longer necessary to remove the front passenger seat when replacing either the main or additional battery on the above
vehicles. Time should not be charged for removing the seat. It is sufficient to slide the seat completely forward to remove and replace either battery.
See WIS document AR54.10-P-0005GZ for the 164 and AR54.10-P-0005RT for the 251 on Remove/Install Battery.

Mercedes Benz Truck R 320 BLUETEC Technical S-83_55-118 Date: 090310 A/C - No Or Low A/C Cooling Performance Date: March 10, 2009

Mercedes Benz Truck R 320 BLUETEC Technical S-83_55-118 Date: 090310
A/C - No Or Low A/C Cooling Performance
Date: March 10, 2009
Order No.: S-B-83.55/118
Supersedes:
Group: 83.55
SUBJECT:
All Passenger and Light Truck Models
Defective Refrigeration Circuit / Refrigerant Compressor
If you receive customer reports in the above model vehicles related to "no or low AC cooling performance", it may be due to a locked refrigerant
compressor, a broken torque limiter on the refrigerant compressor, the refrigeration circuit blocked or an electrical defect in the refrigerant
compressor. To remedy any of these issues please proceed with the following.
Note:
This document is intended as a supplement to the SDS function test "Refrigerant circuit test". Only perform repair and replacement work on the
refrigerant circuit if the SDS refrigerant circuit test was unsuccessful and you have received appropriate instructions in the SDS function test.
Prerequisites:
1. Before parts can be replaced, the exact quantity of the refrigerant in the refrigeration circuit must be determined by evacuating the system. When
returning parts be sure to indicate the exact amount of refrigerant in the circuit and any other findings by the technician. If the filling capacity is not
indicated, warranty claims may be rejected.
2. If the fill level of the refrigerant circuit is too low, parts should only be replaced if the torque limiter is broken.
3. If the fill level of the refrigerant circuit is too low and the torque limiter is damaged, the leak test (Test 6 "Leak in refrigeration circuit") must be
performed using the "Technology Guide Vehicle Climate Control" located in SDS SDMedia first and then the system must be refilled and checked.
If the amount of refrigerant in the circuit is less than 80% of the normal level, it is too low. Inadequate fill levels may be the cause of the air
conditioning shutting down or malfunctioning.
Remedy A - Broken Torque Limiter:
1. Ensure the alternator freewheel (when applicable) is not damaged and that the belt pulley of the refrigerant compressor rotates in the belt drive.
2. If the alternator freewheel is blocked, replace the alternator freewheel. For refrigerant compressors with a replaceable belt pulley, replace the belt
pulley only, otherwise replace the refrigerant compressor. Refer to EPCNet for applicable part number.
3. If the alternator freewheel is not blocked and black refrigerant/oil is evacuated from the system, replace the AC compressor. Refer to EPCNet for
applicable part number.
Remedy B - Blockage in the Refrigeration Circuit
1. Identify through SDS function test "Refrigeration circuit test" that the refrigerant circuit has not been underfilled or overfilled.
2. Inspect along the AC lines to check for blockage at the points with marked temperature differences.
3. Identify and replace the blocked components in the refrigeration circuit. Refer to EPCNet for applicable part number.
Remedy C - Electrical Defect in Refrigerant Compressor
1. Identify through SDS function test "Refrigeration circuit test" that the refrigerant circuit has not been underfilled or overfilled.
2. After ruling out a short circuit in the actuation and ground wiring, replace the refrigerant compressor only. Refer to EPCNet for applicable part
number.
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Note:
^ Always empty the oil from the new refrigerant compressor before installing.
^ When completely refilling the system, ensure the quantity of oil and refrigerant is correct (refer to WIS document BF83.00-Z-9999AZ). Take
into consideration whether individual components or the entire refrigerant circuit are to be replaced.
^ Always perform a leak test on the system after changing the refrigerant circuit but before filling it with refrigerant.
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on
March 10, 2009. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.
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In Case of Warranty, use the tables above.