See also:

General information
If you are no longer able to move the roller sunblind for the rear window after having activated it a number of times in a row, the system is blocked for a limited time to prevent overheating. ...

FTM Flat Tire Monitor
The concept The system does not measure the actual inflation pressure in the tires. It detects a pressure loss in a tire by comparing the rotational speeds of the individual wheels while moving ...

For better control
The indicator lamp flashes: DTC controls the drive forces and brake forces. The indicator lamp lights up: DSC and DTC has failed. DTC activated: The indicator lamp lights up and TRACTION ...