Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Collision-avoiding seat adjustment function - GF91.29-P-2010T
MODELS 211.0/2 with CODE (242b) Electrically adjustable front passenger seat with memory package (driver seat, steering column, mirrors) collision avoidance with rear seat
Function prerequisites:
- Normalizing performed
Function
If the rear seat backrest on the front passenger side is unlocked, the rear SAM control unit with fuse and relay module (N10/2) transmits a signal over the interior CAN to the passenger-side front seat adjustment control unit with memory (N32/2).
The seat fore/aft adjustment for the front passenger seat is moved to the 95 % position (150 mm from front stop).
If the seat fore/aft adjustment is in front of this position, then a backward adjustment can only be made up to this position.
If the rear seat backrest is locked again, the seat remains in its current position.
It is not automatically moved back to its default position.
If the rear seat backrest is locked again, the seat fore/aft adjustment is possible over the entire range of adjustment.
The "collision avoidance with rear seat" function is only possible for the front passenger seat.
| Rear SAM control unit with fuse and relay module, location/task | MODEL 211.0 | GF54.21-P-4130T |
| MODEL 211.2 | GF54.21-P-4130TA | |
| Right front seat adjustment control unit, with memory location/task | GF91.29-P-2107T |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.