See also:

Important safety notes
WARNING   The PARKTRONIC is a supplemental system. It is not intended to, nor does it replace, the need for extreme care. The responsibility during parking and other critical maneuvers ...

Radiator
Vehicles with a diesel engine: do not cover the radiator, for example with a winter front or bug cover. Otherwise, the readings of the on-board-diagnostic system may be inaccurate. Some of these ...

Towing a vehicle with both axles on the ground
When having your vehicle towed, observe the important safety notes WARNING The power assistance for the steering and the brake force booster do not work when the engine is not running. You ...