Complaint: Active Multi-contour Seat function not available.
The fault memory contains the fault “B1EA904 – Multi-contour seat pneumatic pump has malfunction. Internal fault.”
The pneumatic pump can only be activated again by deleting the fault entry.
Cause: The malfunction of the pneumatic pump is due to temporary icing due to large temperature fluctuations.
Remedy:
- Never replace the pneumatic pump!
- The pneumatic pump control unit (M40/1) is equipped with the latest software.
Notes on the new software:
- In the event of temporary icing, a fault is again recorded in the control unit M40/1 and the pneumatic pump remains locked in the current ignition sequence.
- The next time the ignition switch is switched on, the pump restarts and the pneumatic multi-contour function is available again.