Mike - are you able to drain the torque converter, if so, how? How difficult is it to change the differential fluid? I've never changed diff fluid before. What type of oil is recommended?

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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