Central Body Electronics / Bus System

Instrument Cluster
The instrument cluster is similar to the cluster used in the coupes and it is the main source for information display. Information about the status of different operating systems in the vehicle is displayed through the gauges, LCD display, warning LEDs and Gong. Switches are also integrated in the instrument cluster to reset the trip mileage, perform BC functions and to change over some units of measurement e.g. degrees F to degrees C.

Additional to the M Cluster is the use of an engine oil temperature gauge which replaces the fuel economy gauge below the tachometer.

The tachometer incorporates the cold engine warning LEDs that were introduced with the E39 M5. Starting at 4000 RPM, orange LEDs are illuminated with a cold engine start up. The LEDs will go out, in 500 RPM increments, as the engine warms up. The MS S54 engine control system monitors the engine oil temperature and signals the instrument cluster over the CAN line for operation of the oil temperature gauge and illumination of the LEDs.

Central Body Electronics (ZKE)

The following functions are directly controlled by the General Module (GM V):
- Windshield wiping/washing with optional Rain Sensor Interface
- Central locking with power trunk release
- FZV Keyless Entry
- Power window control
- Car Memory/Key Memory Capabilities
- Interior lighting
- DWA alarm system (optional)
- Consumer cut-off/sleep mode

The following functions are included as body electrical systems but are not directly controlled by the GM V:
- Rain Sensor
- Sunroof operation (Sunroof Control module on K Bus).
- Driver's seat electrical adjustment with memory (Seat Memory control module on K Bus)
- Passenger seat electrical adjustment (no control module - switch controlled)
- Mirror Memory - adjustment/heating (also includes windshield washer jet heating switch controlled)