See also:

Cleaning the wheels
Do not use acidic wheel cleaning products to remove brake dust. This could damage wheel bolts and brake components. Do not park the vehicle for an extended period straight after cleaning ...

Tire pressure monitor warning messages
If the tire pressure monitor detects a significant pressure loss on one or more tires, a warning message is shown in the multifunction display. A warning tone also sounds and the tire pressure ...

Problems with PARKTRONIC
Problem Possible causes/consequences and Solutions Only the red segments in the PARKTRONIC warning displays are lit. You also hear a warning tone for approximately two ...