See also:

Mercedes-Benz M-Class Owners Manual
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Adaptive Highbeam Assist
You can use this function to set the headlamps to change between low beam and high beam automatically. The system recognizes vehicles with their lights on, either approaching from the opposite ...

115 V power socket
WARNING   The 115V AC socket operates at high voltage. Use the 115V AC socket in the vehicle with the same caution and prudence that you exercise when using power outlets at home. Keep ...