Mercedes-Benz Mercedes Benz OEM Parts Mercedes Benz OE Replacement Parts
Technical Service Bulletin # S-07_61-039D Date: 091116
Engine Controls - MAF/IAT Sensor DTC Troubleshooting
Date: November 2009
Order No.: S-B-07.61/039d
Supersedes: S-B-07.61/039c (May 2006)
Group: 07.61
Revision History:
Revision Date Purpose
d November Models 204, 207 and 212 Added.
2009
c May 2006 Additional Models application (164.175, 219.375, 251.175)
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b June 2005 Applies to all Model 215 and 220 vehicles;
screen shots and notes under Step B/B1 Changed
SUBJECT:
TROUBLE SHOOTING FAULT CODES RELATED TO:
^ ADAPTATION LIMITS OF LAMBDA CONTROL
^ MASS AIR FLOW SENSORS / INTAKE AIR TEMPERATURE SENSOR
MODELS
This bulletin explains how to troubleshoot fault codes P2004-[ ], P2006-[ ], P2017-[ ], P2086-[ ], P2016-[ ], and P2085-[ ] by providing a special
fault tree for each P-code. Troubleshoot each fault code by solving it before moving onto the next code. If you have no codes or a code other than
the above P-codes DO NOT REPLACE THE AIR MASS SENSOR.
Requirements for ALL air mass sensor replaced under warranty:
^ Printout of all fault codes of the ME2-SFI-motor electronics (short test).
^ Freeze frame data of all fault codes stored in the ME2-SFI-motor electronics.
^ Signal voltage printout Fig. 4 (page 10) of component B2/5 (Hot film MAF sensor).
^ Returned MAF sensors without the required information will be debited back to the dealer.
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Note:
Only original, readable printouts with the VIN number (DAS-readout) of the vehicle are accepted. The required printouts can be made only with
DAS-Version starting 02/04. All mass air flow sensors will be tested and if found to be functioning correctly will be sent back to the dealer and the
corresponding claim will be debited.
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In case of Warranty, use the table above.
MAF Sensor/Self-Adaptation of Mixture Formation
MAF sensor and self-adaptation of mixture formation trouble-shooting diagram
Repair process for fault code P2004-[ ]
Functional description of the MAF sensor:
Upon engine start, a current is passed through the MAF sensor, heating the wire film to a certain temperature. As air passes through the sensor, this
film is cooled and the sensor determines how much electricity is required to keep the film up to temperature. This enables the sensor to determine
how much air (in weight) is passing through the sensor at any given moment. This signal is then sent to the ECU which it compares to a
preprogrammed map to deliver fuel and ignition spark, taking into account other engine inputs such as engine RPM and temperature.
The air intake temperature sensor is also mounted in the mass air flow sensor.
The monitor of the MAF sensor is active after a specified time after engine start and above a specified engine speed threshold.
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Repair process for fault code P2004-[2]
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Repair process for fault code P2004-[1]
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Repair process for fault code P2004-[4]
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Repair process for fault code P2004-[8]
Description of test steps of remedy process fault codes P2004-[ ]
Step A: Test voltage supply 5V of component B2/5 ( MAF sensor).
Step A1: Additionally please check the voltage supply of component B2/5 (MAF sensor) also with running engine to extend this test on higher
temperature and vibration conditions of the MAF sensor.
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Step A2: If the measured value is not O.K. please follow the next steps shown in Fig. 2:
Step B: Test voltage supply 12V of component B2/5 ( MAF sensor).
Step B1: Additionally please check the voltage supply of component B2/5 (MAF sensor) also with running engine to extend this test on higher
temperature and vibration conditions of the MAF sensor.
If the measured value is not O.K., check for a short circuit on the wiring or connector of the12V battery voltage cable and also the Z-connection
(Z7/35) of the MAF sensor (B2/5).
Step C: Test signal voltage of component B2/5 ( MAF sensor) by means of actual value.
Technical Service Bulletin # LI42-10_P-048315 Date: 091208
Brakes - Rear Brake Squeal
REAR BRAKES SQUEAL WHEN APPLIED
Topic number LI42.10-P-048315
Version 1
Design group 42.10 Service brake
Date 12-08-2009
Validity Model 212.056 with code (494/050/Q06) and model 212. 072 with code 494.
Reason for change
Reason for block
Complaint:
Rear wheel brake squeal when braking.
2010 Mercedes Benz E 550 Sedan (212.072) V8-5.5L (273.971) Page 179
Cause:
Resonant vibrations
Remedy:
1. Check brake pads for ease of movement.
2. Remove brake pads from brake pad slots and clean the slots if necessary.
3. Replace brake pads and housing retaining springs.
Note:
Lubricate brake pads on their guide pieces ("hammer heads") with MB Plastilube brake paste, see attachment.
Remark:
- As a rule brake disks do not have to be replaced due to brake squeal. One exception is major score marks or waviness resulting from wear. In, this
case the possibility of brake squeal cannot be fully ruled out.
- Reproduce squealing noise when braking and ensure that the noise is caused by the rear axle.
- If necessary, use the help of an assistant to localize the noise.
Attachments
Symptoms
Parts
Work Units
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WIS-References
Validity
Attachment - Lubricate brake pads on guide pieces
