E 63 AMG Sedan (212.077) V8-6.3L (156.985) (2010)
Seat Back: Customer Interest
Interior - Pneumatic 4-Way Lumbar Support Fails
Failure of pneumatic 4-way lumbar support
Topic number
LI91.10-P-048411
Version
2
Design group
91.10 Front seats
Date
02-09-2010
Validity
Model series 204, 212, 207, 164, 251 with pneumatic lumbar support! Not valid for code 409 or 432 (multicontour or dynamic seat)
Reason for change
Additional damage cause and remedy added
Reason for block
Complaint:
The pneumatic 4-way lumbar support fails.
(Lumbar support on multicontour seat / dynamic seat not affected!)
Cause:
Cause 1: Sporadic function failure and subsequent system shutoff at low temperatures due to faulty pressure parameters.
Cause 2: Air cushions can be inflated but not deflated regardless of temperature and ignition cycle due to a stuck valve.
Remedy:
Remedy - cause 1:
Under analysis!
Do not replace any parts!
Remedy - cause 2:
Loosen stuck valve by knocking on valve housing (see picture Lo1)
If the valve cannot be loosened, replace the lumbar support module.
Attachments
Symptoms