See also:

Mercedes-Benz M-Class Owners Manual
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Air distribution settings
Dual-zone climate control: the air distribution can be set individually for the driver's and front-passenger sides. Directs air through the defroster vents Directs air through the center a ...

Setting a speed
WARNING Keep in mind that it may take a brief moment until the vehicle has made the necessary adjustments. Increase or decrease the set vehicle speed to a value that the prevailing road cond ...