Lumbar support, Convertible

Electrically operated seats/driver's seats have a pneumatic lumbar support. A switch (357o) placed in the seat cover on the seat side, is controlled by an electric compressor (357m) and a valve (357v). These are placed in the lower rear part of the seat. In the backrest is a plastic cushion which can be enlarged or reduced by compressed air from the compressor and a valve. The compressor and valve are supplied from fuse 27 in the REC via the switch and grounded in G34P (LHD) or G33P (RHD). This system works wholly independently without bus communication and memory function.