Lumbar adjustment function - GF91.29-P-0008GR
MODEL 166 up to model year 2016 with CODE 275 (Memory package (driver seat, steering column, mirrors))
MODEL 166 up to model year 2016 with CODE 560 (Left and right electrically adjustable driver seat)
MODEL 166 up to model year 2016 with CODE P64 (Memory package)
Function requirements, general
- Circuit 30g On or run-on active
- No overvoltage or undervoltage
- No on-board electrical system limp-home mode
If circuit 30g is switched off, the lumbar support remains adjustable for t = 180 s (run-on time). If, during the run-on time, the circuits status or the door status is changed, the run-on time starts again.
Lumbar support adjustment, general
To achieve optimum support of the vertebral column, the backrests on the driver and front passenger seat are each equipped with a lumbar support unit.
The lumbar support unit consists of the following components:
- two air cushions
- Lumbar support pneumatic pump
- Lumbar support adjustment control unit
Function sequence for lumbar support adjustment
Setting is performed via the lumbar support adjustment switch. The signal of the lumbar support adjustment switch is read in directly by the lumbar support adjustment control unit. The lumbar support adjustment control unit controls the corresponding inflation or deflation of the air cushions via integrated valves. The lumbar support pneumatic pump is directly actuated by the lumbar support adjustment control unit for the compressed air supply.
| Electrical function schematic, lumbar support adjustment | PE91.29-P-2055-97NAA |
| Overview of system components, electric seats | GF91.29-P-9992GR |