See also:

Shiftlock
When your vehicle is parked, the gear selector is locked in the P (Park) position. To release the selector from this position, the ignition must be in mode II (see page 82) or the engine must ...

Activation
PAC is activated when the gear selector is moved to R if the system is selected in the MY CAR menu system or by pressing the CAM button in the center console. See page 133 for a description ...

Faults in the system
If the yellow warning symbol illuminates and PARK ASSIST SERVICE REQUIRED is shown on the information display, this indicates that the system is not functioning properly and has been disengage ...