A1 General module

Connector overview

NumberX-pin, colorDescription
X25326-pin, blackConnector B General module
X25420-pin, blackConnector C General module
X33226-pin, blackConnector A General module

Pin assignments at connector X253

PinTypeDescription / Signal typeConnection /
Measuring notes
1ADriver's door contact signalDriver's door jamb switch
   
2AEngine hood signalSaloon only Underhood light switch
   
3 Not used 
   
4AInterface signal RDC/DWARDC control module
   
5AInterior protectionSaloon only Interior protection control module
   
6 Not used 
   
7AWiper-washer controlIntermittent wipe/wash control unit, rear
   
8AVehicle tilt signalSaloon only Tilt sensor
   
9 Not used 
   
10ATrunk lid open signalTrunk lid locking switch
   
11ATrunk lid open signalTrunk lid release switch (interior)
   
12APressure-sensitive finger guard system signalLeft rear window pressure-sensitive finger guard right-hand drive Right rear window pressure-sensitive finger guard
   
13ACrash signalSupplemental restraint system control module
   
14 Not used 
   
15EWiper control IWiper relay
   
16EWiper control IIWiper relay
   
17AHeadlight wash controlHeadlight washer module
   
18AIntensive wash controlHeadlight washer module
   
19ELED controlElectrochromic rear view mirror
   
20ATilt signalTilt sensor
   
21EStarter relayTouring only Rear lid motor relay
   
22ERelay Unlock trunk lidTouring only Window motor relay
   
23ESignal Rear left wheel speed (not used on S62)Integrated instrument cluster control module (IKE) Instrument cluster
   
24APressure-sensitive finger guard system signalRight rear window pressure-sensitive finger guard right-hand drive Left rear window pressure-sensitive finger guard
   
25AIntermittent wiper voltage supplyWiper/washer switch
   
26MTerminal 31Ground splice
   

Pin assignments at connector X254

PinTypeDescription / Signal typeConnection /
Measuring notes
1MTerminal 31 Ground wireGround point right-hand drive Ground splice
   
2AOpen window signalLeft rear window motor right-hand drive Right rear window motor
   
3AEngine Unlock trunk lidZV drive rear lid Touring Trunk lid servo motor
   
4ETerminal 30Fuse F27
   
5AOpen window signalRight rear window motor right-hand drive Left rear window motor
   
6ALock signalRear doors/tank access flap central locking motors
   
7 Not used 
   
8MTerminal 31Touring only Ground splice
   
9AServotronic control (not used on S62)Electro-hydraulic converter (Servotronic)
   
10ETerminal 30Fuse F4
   
11AServotronic control (not used on S62)Electro-hydraulic converter (Servotronic)
   
12AClose window signalLeft rear window motor right-hand drive Right rear window motor
   
13ACentral arrest signalRear doors central locking motors
   
14AUnlock signalRear doors/tank access flap central locking motors
   
15AClose window signalRight rear window motor right-hand drive Left rear window motor
   
16 Not used 
   
17AHorn signalAnti-theft horn (DWA)
   
18APump signalWasher pump
   
19AConsumer cut-off signalConsumer cut-off splice
   
20AInterior lights signalInterior lights splice
   

Pin assignments at connector X332

PinTypeDescription / Signal typeConnection /
Measuring notes
1ETerminal 30Fuse F11
   
2EInterior lights signalInterior/reading lamp, front
   
3EWindshield wash signalWiper/washer switch
   
4EWindshield wipe signal 2Wiper/washer switch
   
5EWindshield wipe signal 1Wiper/washer switch
   
6EDoor contact signalRear right door jamb switch right-hand drive Left rear door jamb switch
   
7EDoor contact signalLeft rear door jamb switch right-hand drive Rear right door jamb switch
   
8EDoor contact signalPassenger's door jamb switch
   
9EUnlock signalSaloon only Lift gate lock switch
   
10AIntensive wash controlHeadlight washer module
   
11ETrunk lid closed signalZV drive rear lid
   
12E/AK-bus signal lineK-bus splice
   
13ECentral locking signalElectrochromic rear view mirror Central locking remote control
   
14MGroundGround splice
   
15EClose window signalLH rear power window switch right-hand drive RH rear power window switch
   
16EIntensive wash signalWiper/washer switch
   
17EOpen window signalRH rear power window switch right-hand drive LH rear power window switch
   
18EClose window signalRH rear power window switch right-hand drive LH rear power window switch
   
19ESoft-close automatic unlock signalSoft close trunk lid motor assembly
   
20EWipers in motion signalWiper motor
   
21ATrunk lid open signalRear window servo opening switch
   
22ELocked signalSaloon only Lift gate lock switch
   
23ETerminal RFuse F38
   
24EClose signalGlobal locking switch
   
25E/AP-bus signal lineP-bus splice
   
26EOpen window signalLH rear power window switch right-hand drive RH rear power window switch