See also:

Mercedes-Benz M-Class Owners Manual
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Restarting the tire pressure loss warning system
Restart the tire pressure loss warning system if you have: changed the tire pressure changed the wheels or tires mount new wheels or tires Before restarting, consult the Tire and Loading Inf ...

Digital speedometer
Press the or button on the steering wheel to select the Trip menu. Press or to select the digital speedometer. ...