R 350 4MATIC (251.165) V6-3.5L (272.967) (2006)
License Plate Frame: All Technical Service Bulletins
Parking Assist System - False Triggering
Date: February 1, 2007
Order No.: T-B-54.65/182
Supersedes:
Group: 54
SUBJECT:
Model 164.122/175/177/186
Model 251.122/165/175
All Model Years with SA code 220 (Parktronic)
Parktronic Triggers Without Obvious Cause at Front Bumper Due to License Plate Width
If you receive customer reports on the above model vehicles exhibiting all of the below symptoms, this may be caused by the side edges of the license
plate being detected as an obstruction by the PTS sensor. Due to varying license plate widths, the system may trigger at the front at random.
1. Parktronic triggering without obvious cause at the front sensors
2. No faults are present or stored in the parktronic control unit
3. The complaint does not occur when the front license plate is removed
NOTE:
No additional license plate frame should be mounted on the front bumper.
To resolve, follow steps below to program license plate width:
1. Information and Communication -> Parktronic -> Control unit adaptations -> Read coding and modify if necessary -> License plate bracket
2. Code the actual width of the license plate bracket.
NOTE:
The allowable labor operations should be used when submitting a warranty claim for this repair.
In Case of Warranty
Operation:
Short test, perform (54-1011)
Control unit - ... Code (after short test), perform (54-0992)