PSI (pounds per square inch)

A standard unit of measure for tire pressure.

    See also:

    Checking the coolant level
    Only check the coolant level when the vehicle is on a level surface and the engine has cooled down. Turn the SmartKey to position 2 in the ignition lock. On vehicles with KEYLESS-GO, press 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 ...

    Automatic interior lighting control
    •► To switch on/off: press the button. When the automatic interior lighting control is activated, the button is flush with the overhead control panel. The interior lighting automatically ...