92 400 SEL wiring diagrams

Can anybody tell, where can be found electrical diagrams. I have some problems: - The electronic system of left front door do not work propely. - The neckrests of back bench do not work.
Thanks
Ripa
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Your car is famous for having a bad wiring harness. MB has had these on recall for years. Check to see if you have an original. If so, install a new harness before you start trying to fix electrical problems. The original harness is a problem....and it will break down, just a matter of time.
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