Switching the seat ventilation on/off

See also:

Refined atmosphere for maximum driving pleasure
The high-class interior - which seems even more spacious when fitted with the optional panoramic glass sunroof - makes use of new materials and colour combinations to enhance the high-class appeal ...

Vehicle data, GL 450
The data stated here refers specifically to a vehicle with standard equipment. Consult an authorized Mercedes-Benz Center for the data for all vehicle variants and trim levels. ...

Hazard warning lamps
The hazard warning lamps automatically switch on if:  - an air bag is deployed.  - the vehicle is slowed down severely from a speed of over 45 mph(70 km/h) and comes to a halt. ...