Gonna do the swap to my 81 soon. I've dug through the threads of others who have tried this but I have one unanswered question regarding the wiring. What about the neutral safety switch? Also about the backup lights? I assume these are the same.... I thought this was pretty much plug and play but I suspect the harnesses are different.

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1978 Mercedes 240D
1981 Mercedes 240D
1982 Mercedes 240D