Door, Lock And Lid Switches

There are contact breakers on the side doors and tailgate/trunk lid which indicate whether the door or lid is open or closed. There is also a separate contact breaker at the hood if the car has an alarm. There is no contact breaker at the fuel tank filler cover. The contact breakers are closed when the door or lid is closed, providing a ground connection to the central electronic module (CEM).

There is a contact breaker in each lock unit that indicates the position of the lock motors on the central locking motor and lock motor for electrical child-proof lock (if such a lock unit is installed). The contact breakers are directly connected to its respective door control module, which then forwards the information to the central electronic module (CEM).