General Information, Version Coding

NOTE: The PSE provides pressure or vacuum for the following systems:
- Central locking (CL), (pressure or vacuum) - activation via remote central locking (RCL), interior switch (CL) (S6/1s2) and via mechanical key (only (USA) (J)).
- Remote trunk release (RTR), (pressure) - activation via remote trunk release switch (S15) or via remote central locking (RCL), (RTR except for model 170).
- Retractable rear head restraint (RHR), (vacuum) - activation via RHR unlocking switch (S6/1s3). (RHR for model 140 only).
- Multi-contour seat (OSB), (pressure) - control of the working pressure via pressure switch in the PSE, as soon as the ignition ON signal is received via the CAN-interface. (OSB for models 129,140 only).
- Manifold Vacuum Assist (MVA), (vacuum) - control of the working vacuum via pressure switch in the PSE, as soon as the ignition ON signal is received via the CAN-interface. (MVA for model 140 only).

Diagnostic Trouble Code (DTC) Memory:
- Pneumatic as well as electrical faults of the systems (CL, OSB, MVA, RTR and RHR) are recognized by the PSE and stored in the DTC memory. DTC memory can only be readout and erased using the Hand-Held-Tester (HHT).

CAUTION! Erasing the DTC memory, may also erase the DTC memory for the other systems which use the PSE control module DTC memory.

Additional components of the PSE:
- Heated rear window relay (model 170 only)
- Crash sensor for emergency unlocking
- ATA control module (model 170 only)






PSE control module version coding:
- The PSE control module (A37) must be version coded. In the HHT display, the menu point 6 appears as a result.
- Version coding is menu driven.