See also:

Checking the coolant level
1. Do not open the hood until the engine has cooled down. 2. Turn the expansion tank cap counterclockwise slightly to allow any accumulated pressure to escape; then continue turning to open. ...

Malfunction
The warning lamp comes on when the system has failed. A message appears on the Control Display. More information ...

Switching the warning function on/off
Switching the warning function on/off Press the button ▷ On: the LED lights up. ▷ Off: the LED goes out. The state is stored for the remote control currently in use. ...