General information
If the trailer socket is occupied, some driver assistance
systems are unavailable, or available to a
limited extent. A Check Control message is displayed
where applicable.
When driving with a trailer or load carrier and the
trailer socket not occupied, some driver assistance
sys
Fuel tank leakage diagnosis module
The fuel system leak test is regularly conducted when the engine is switched
off. Here, the following processes
are executed during the DME run-down period:
Initial situation
During normal engine operation, the switchover valve in the diagnosis module
is in t