See also:

System self-test
After you have switched on the ignition, the system carries out a self-diagnosis. WARNING A malfunction in the system has been detected if one of the following conditions occurs:  - ...

Points to observe before use
The sockets can be used for accessories, e.g. lamps or mobile phone chargers with a maximum current draw of 180 W (15 A). If you use the sockets for long periods when the engine is switched off, ...

Underinflated or overinflated tires
Underinflated tires WARNING Follow recommended tire inflation pressures. Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect handling and fuel ...