A1 General module

Plug connector overview

NumberX-pin, colourDescription
X25326-pin, blackPlug connector B General module
X25420-pin, blackPlug connector C General module
X33226-pin, blackPlug connector A General module

Pin assignments at plug connector X253

PinTypeDescription / Signal typeConnection /
Measuring notes
1ASignal, driver's door contactDriver's door contact switch
   
2AFront lid signalFront lid contact switch
   
3 Not used 
   
4 Not used 
   
5AInterior protectionInterior protection control unit
   
6AInterior protectionTouring only Control unit, radio-operated passenger compartment protection
   
7AWipe-wash controlTouring only Intermittent wipe/wash control unit, rear
   
8AVehicle inclination signalTilt sensor
   
9 Not used 
   
10ARear lid open signalRear lid unlocking switch
   
11ARear lid open signalRear lid release switch (interior)
   
12ASignal, anti-jamming systemJamming protection switch, rear left window
right-hand drive Jamming protection switch, rear right window  
13ACrash signalAirbag diagnostic module
   
14ADrive-away protectionElectronic immobilizer control unit (EWS)
   
15EWiper I activationWiper relay I
   
16EWiper II activationWiper relay II
   
17AHeadlight cleaner activationHeadlight washer module
   
18AIntensive wash activationHeadlight washer module
   
19ELED activationElectrochromic interior rear view mirror
   
20AInclination signalTilt sensor
   
21ESignal Unlock rear windowWindow motor relay
   
22ERelay Unlock boot lidRear lid motor relay
   
23ESpeedometer (A) output signalIntegrated electronic control unit (IKE)
   
24ASignal, anti-jamming systemJamming protection switch, rear right window
right-hand drive Jamming protection switch, rear left window  
25AIntermittent switching supplyWindscreen wiper switch
   
26MTerminal 31Ground connector
   

Pin assignments at plug connector X254

PinTypeDescription / Signal typeConnection /
Measuring notes
1MTerminal 31 Power groundGround point
right-hand drive Ground connector  
2AOpen window signalPower window motor, rear left
right-hand drive Power window motor, rear right  
3AEngine Unlock boot lidBoot lid servo motor
   
4ETerminal 30Fuse F27
   
5AOpen window signalPower window motor, rear right
right-hand drive Power window motor, rear left  
6ALock signalZV motor drives, rear doors/tank flap
   
7 Not used 
   
8MTerminal 31Ground connector
   
9AServotronic activationElectrohydraulic converter of servotronic
   
10ETerminal 30Fuse F4
   
11AServotronic activationElectrohydraulic converter of servotronic
   
12AClose window signalPower window motor, rear left
right-hand drive Power window motor, rear right  
13ACentral arrest signalZV motor drives, rear doors
   
14AUnlock signalZV motor drives, rear doors/tank flap
   
15AClose window signalPower window motor, rear right
right-hand drive Power window motor, rear left  
16 Not used 
   
17AHorn signalAntitheft horn (DWA)
   
18APump signalWasher pump
   
19ASignal, switch off consumer loadConnector, switch off consumer load
   
20AInterior lights signalConnector, interior lights
   

Pin assignments at plug connector X332

PinTypeDescription / Signal typeConnection /
Measuring notes
1ETerminal 30Fuse F11
   
2EInterior lights signalInterior/reading lamp, front
   
3EWindscreen wash signalWindscreen wiper switch
   
4EWindscreen wipe 2 signalWindscreen wiper switch
   
5EWindscreen wipe 1 signalWindscreen wiper switch
   
6EDoor contact signalRear RH door contact switch
right-hand drive Rear left door contact switch  
7EDoor contact signalRear left door contact switch
right-hand drive Rear RH door contact switch  
8EDoor contact signalPassenger's door contact switch
   
9EUnlock signalRear lid lock switch
   
10AIntensive wash activationHeadlight washer module
   
11ERear lid closed signalZV drive rear lid
   
12E/AK-bus signal lineK-bus connector
   
13ECentral locking signalRemote control central locking
   
14MGroundGround connector
   
15EClose window signalRear left door power window switch
right-hand drive Rear right door power window switch  
16EIntensive wash signalWindscreen wiper switch
   
17EOpen window signalRear right door power window switch
right-hand drive Rear left door power window switch  
18EClose window signalRear right door power window switch
right-hand drive Rear left door power window switch  
19ESignal soft-close automatic unlockMotor drive for rear lid servo lock
   
20ESignal, windscreen wipers in motionWiper motor
   
21ARear lid open signalRear window servo opening switch
   
22ELocked signalRear lid lock switch
   
23ETerminal RFuse F38
   
24EClose signalCentral locking (ZV) switch
   
25E/AP-bus signal lineP-bus connector
   
26EOpen window signalRear left door power window switch
right-hand drive Rear right door power window switch