I turn mine with a 27 or 28MM deep well 1/2" socket - I think 1 1/16" might work as well (but I'm not exactly sure what size socket you will need). You are looking for the bolt in the center of the crankshaft pulley and will probably have to work your socket wrench in behind the fan - you may not be able to see it and will have to work the wrench on by feel. Make sure you turn the engine clockwise...

ryan

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RG Newell

1984 300D
1972 250
1986 560SL
1991 300CE