I could totally figure it all out if my speedometer worked haha, Johnathan said he thinks the sender from the transmission is shot, so I need to run to a junkyard and see if I can find one. I assume that part in question could be interchangeable between the coupe and sedan? Also, how many different types of transmissions were used in the W126 chassis? Would a 420SEL use the same transmission as my 560SEC?
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