Sometimes as mentioned above the E-brake can get in the way...find the star wheel through the lug hole and loosen it to pull the parking brake pads back far enough to ensure they are not interfering.

Then use a BFH

Jonathan

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Blue Ridge Mercedes
Jonathan Hodgman
http://www.blueridgemb.com/
Enthusiast Service, Restoration & Tuning.
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Located in the Atlanta area
Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines.
Mercedes Repair Atlanta