Problems with the SmartKey

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4MATIC (permanent four-wheel drive)
Never tow the vehicle with one axle raised. This may damage the transfer case. Damage of this sort is not covered by the Mercedes-Benz Limited Warranty. All wheels must remain either on the grou ...

Defrosting the windows
Windows fogged up on the inside ► Activate the cooling with air dehumidification function. ► Activate automatic mode . ► If the windows continue to fog up, activate the defrost ...

Information on 4MATIC vehicles
Vehicles with 4MATIC must not be towed with either the front or the rear axle raised, as doing so will damage the transmission. If the vehicle has transmission damage or damage to the front or rea ...