See also:

Windows fogged up on the outside
Switch on the windshield wipers. Press the button repeatedly until the or symbol appears in the display. You should only select this setting until the windshield is clear again. ...

Switching the ZONE function on/off
•►  To switch on: press the button. The indicator lamp above the button lights up. Dual-zone automatic climate control: the temperature setting for the driver's side is not adopt ...

Refrigerant of the air-conditioning system
The air-conditioning system is filled with R134a refrigerant and a special PAG lubricant. Never use refrigerant R 12 (CFC) or mineral lubricants. Otherwise, you could damage the air-conditio ...