I hate that bolt but have had good luck using 2 wobble extensions so that the bolt is addressed in a straight line by the socket. Also having a length of pipe over the breaker bar allows more control over what you are doing.

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Hanno
'79 6.9 Sold (after 27 years)
'83 280SL, 5 spd.
'94 E320 Sdn. 5 spd conversion
'02 E320 Sdn.(on loan to mom!)
'87 300E (5 spd. conversion) Sold
'05 E500 Wagon