PSI (pounds per square inch)

A standard unit of measure for tire pressure.

    See also:

    Inflating the collapsible spare wheel
    WARNING Inflate the collapsible spare wheel only after the wheel is properly attached. Inflate the collapsible spare wheel using the tire inflation compressor before lowering the vehicle. ...

    Underinflated tires
    WARNING Follow recommended tire inflation pressures. Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect handling and fuel economy, and are more ...

    Transfer case
    This section is only valid for vehicles with 4- wheel drive (4MATIC). Power is always transmitted to both axles. Performance tests may only be carried out on a 2-axle dynamometer. The brake ...