Can you top this??? You can't make this up. A little background- Have 230SL with a bad engine, bought a '68 250SE donor sedan w/frozen engine, towed home 70 miles, pulled engine/tranny as unit, pan off, oil pump frozen in, got bevel gear off idle shaft(oil pump, etc) with a little help. Then, the sprocket came off-fell off the idle shaft. No key resistance. Looked at the key. It was a 'offset key'!!. One of the kind for the cam shaft sprocket to offset chain stretch.
This has got to be in Shade Tree Hall of Fame!