Mercedes-Benz M-Class instrument cluster

The 30 pin connector behind the instrument cluster

 
A Connector Pins
1  left turn indicator lamp
2  high beam indicator
3  ground
4  not used
5  instrument light dimming pot
6  AAM - door contact switch output 
7  fuse 1
8  SRS fault light
9  fuse 16
10 right turn signal lamp
11 fuse 5
12 not used
13 fuse 9
14 steering lock switch
15 seat belt indicator
16 not used
17 not used
18 airbag off indicator lamp

B Connector Pins
1  charge indicator
2  fuel level sensor
3  fuel level sensor
4  key in starter switch
5  outside temperature sensor
6  outside temperature sensor
7  coolant level sensor switch
8  coolant level sensor switch
9  CAN-Bus Low
10 CAN-Bus High
11 diagnostic DTC connector
12 not used

From a MY2000 M-Class. Other years may differ.

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