Mercedes Benz Truck R 320 BLUETEC Technical S-91_16-179 Date: 081104 Mercedes Benz Truck R 320 BLUETEC Page 169 Restraints - Can't Reset Active Head Restraints

Mercedes Benz Truck R 320 BLUETEC Technical S-91_16-179 Date: 081104
Mercedes Benz Truck R 320 BLUETEC
Page 169
Restraints - Can't Reset Active Head Restraints
Date: November 4, 2008
Order No.: S-B-91.16/179
Supersedes:
Group: G91
SUBJECT:
All Model 164, 204, 209, 211, 219, 221 and 251 Vehicles
Active Head Restraints Cannot be Reset
If you receive customer reports in the above model vehicles of the active head restraint not able to be reset by the process illustrated in the owner s
manual, this may be caused by the solenoid in the head restraint not allowing the head restraint to reset. To remedy, please follow the procedure
below.
1. Remove the seat back lining of the affected seat and unplug the connector of the active head restraint (Figure 1). See table below for WIS
references per model for removing the seat back lining.
2. Connect adapter cable to the head restraint side of the Neck Pro wiring harness using special tool W220 589 00 99 02 from kit W220 589 00
99 00 (Figure 2).
Mercedes Benz Truck R 320 BLUETEC
Page 170
3. Connect adapter cable to Vehicle Power Adapter Plug with Banana Jack (found in Solar Panel Charging Module W900 589 02 63 00, or is
locally available at Radio Shack Catalog #: 270-1521) using tester cable W220 589 00 99 20 from kit W220 589 00 99 00 (Figure 3)
NOTE:
It is not necessary to use the vehicle power adapter, but it is highly recommended.
4. Turn to at least key position 1 and plug the Vehicle Power Adapter Plug into the 12 V onboard power supply for about 1 second and then
unplug from onboard power supply.
NOTE:
Do not leave the Vehicle Power Adapter Plug in for more than about a second. Extended stress from current on the solenoid may damage
the solenoid.
5. Switch leads on the Vehicle Power Adapter Plug [put (+) to (-) and (-) to (+)], and repeat step 4.
6. After the process is done, it should be possible to reset the head restraint as described in the owner s manual.
Special Tools
NOTE:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated
on November 4, 2008. Please refer to Netstar -> Star TekInfo -> Star Time for the most current labor time allowance.
Mercedes Benz Truck R 320 BLUETEC
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In Case of Warranty
Operation: Seat backrest rear covering - front passenger seat, R&R/replace (91-5852)
Seat backrest rear covering - on driver seat R&R/replace (91-5832)
Headrest reset procedure (91-0000)