Just curious, but has anyone had any type of rear differential failure related to the lack of changing the diff oil? Or are we all just wasting our time buying 14mm special hex heads (that only Auto Zone sells), and using pipe extensions?

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2003 S500 Black/Charcoal
1990 560SEL 61k Arctic White/Grey

SOLD:
1988 420SEL Black/Palomino Sold @ 85k
1987 420SEL Midnight Blue/Grey
1986 420SEL Diamond Blue/Grey
1983 380SEL Champagne/Palomino