See also:

Sound output
Switching on/off When the ignition is switched off: press ON/OFF button on the radio. Muting When the ignition is switched on or the engine is running: press the ON/OFF button on the radio. ...

Low tire pressure message
The yellow warning lamp lights up. A Check Control message is displayed. There is a flat tire or a major loss in tire inflation pressure. The system was not reset after a wheel change ...

Switching on/off manually
Press the button. On: the LED lights up. Off: the LED goes out. ...