Window Switches
The window switches of the E65 are of the press/pull type as first seen on the E46. The drivers door switch block is a control unit that communicates with the door module via a local P-bus (single wire: 9.6 kbps).
The drivers door module signals the status of all of the switches of the drivers switch block to the other door modules and the CAS over the K-CAN-P.
The single switches in the passenger doors are conventional ground switches that communicate 5 statuses over 2 wires as used on the predecessor E38.