Only for the OM642 3.0L V6 diesel engine 2010 and later (BlueTec)
These are manufactured by Borg Warner, the OEM supplier to Mercedes Benz. This is the identical unit as those sold at a franchise dealer.
The fan clutch for the 2010 and later engines has an electrically actuated clutch. The earlier 2007-2009 models have a centrifugally actuated declutching mechanism.