See also:

Cleaning the wheels
Do not use acidic wheel cleaning products to remove brake dust. This could damage wheel bolts and brake components. Do not park the vehicle for an extended period straight after cleaning it, ...

Setting the air distribution
Air distribution settings Automatic climate control: the air distribution can be set individually for the driver's and front-passenger sides. Front control unit: Directs the airflow through the ...

Safety & Reliability
As of this writing, the Insurance Institute for Highway Safety has not yet crash-tested the GL-Class. Eight standard airbags include three-row side curtain airbags and seat-mounted side-impact air ...