S 500 4MATIC (220.184) V8-5.0L (113.966) (2003)
Head Rest: Technical Service Bulletins
Interior - Passenger Headrest Automatically Lowers
Date: August 27, 2003
Order No.: P-B-91.16/63
Supersedes:
Group: 91
SUBJECT:
Model 220.170/175/178/183/184
Model 215.374/375/376
Model Year 2003
Headrest Automatically Lowers
In the above models if you receive customer reports of the passenger side head restraint automatically lowering when the seat is not occupied, do not
perform any repairs. This is a feature, which aids in improving driver viewing. This feature is explained within Revision B of the 2003 Sand CL-class
owner's manual. Please refer the customer to page 37 of their owner's manual for operating instructions.
Note:
For reference the owner's manual states: The front passenger seat head restraint automatically lowers after a few seconds when the front passenger
seat is not occupied. This improves the driver's outward view as well as the forward view from the rear passenger compartment. When the front
passenger seat is occupied again, the front passenger seat head restraint returns to the last set position within a few seconds. If the front passenger
seat was moved fore or aft while not being occupied, the front passenger seat head restraint returns to a position that corresponds best with the seat's
axial position when the seat is occupied again."
Note:
This condition can be falsely triggered if objects such as brief cases, or purses are placed on the passenger side seat. The head restraint may
automatically raise and lower as the object's weight shifts.
Note:
Please instruct the customer not to place objects onto the seat that are heavier than 20 lbs (9 Kg). This could cause the front or side impact airbag on
the front passenger side to deploy in a crash which exceeds the SRS deployment threshold.
Note:
As of model year 2004 series production 220.XXX-1A-385118, and 215.XXX-1A-039250, the automatic front passenger head restraint is
deactivated. Upon customer request it will be able to activate this feature through STAR Diagnosis with software release 10/03. Additionally for
2003 model year 220 and 215 vehicles, it will also be possible to deactivate/activate this feature.