Date registered: Mar 2005
Vehicle: '01-E320 & 02-ST2
Location: John 15:18-19
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Quoted: 12 Post(s)
Take a good picture of the bolt from a few angles and post them. If you have not chewed it up too badly you may be able to grind two flat faces onto it (dremel) and then use LARGE vise grips to remove it.
If it is simply too badly chewed up and you have a clean place to work, then I would remove the lower oil pan -- be careful, it's full of oil -- and tape plastic over the opening to help keep dirt out. Then I'd pour out the oil, wipe out the lower pan and drill the bolt center out and use a reverse-thread screw extractor, clamping it into a bench-mounted vise and turning the lower pan (better torque and stability).
Then clean off all the old sealant from both halves, spray the mounting surfaces with brake cleaner/similar and wipe and let dry, then apply new sealant and reinstall. After it's cured (overnight is best) then install the drain plug and torque to 25NM (about 18 ft/lbs).
Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; its inherent virtue is the equal sharing of misery. (Winston Churchill)