I am getting ready to do the left head gasket on my 560 SL. I would like to know what are the absolutly necessary tools required. The manual specifies a 1/2" drive 8mm hex drive tool # 116 589 00 13 00, which is a hex drive that goes around the camshaft or oil rail. Is this absolutly necassary or are there some good work arounds. I did a few of these 25 years ago on several 450 series and I don't remember using this tool. The slide hammer and 6 mm "T" allen wrench seem something I can get away without.

Thank You
John Roncallo