Radio P20 is supplied directly (pin 7 of connector A) from the battery via the line for fuse F23 of the engine compartment junction unit B1 .The radio P20 receives an ignition-operated (INT) power supply (pin 4 of connector A) via the line for fuse F49 of the junction unit under the dashboard B2 .Pin 8 of connector A is earthed.Pins 1 and 3 of connector A receive the CAN line by which radio P20 is connected to Body Computer M1 and the other system nodes.The control buttons located in the front courtesy light G10 - connector G - are connected to pins 10 and 12 of connector D of P20.