I replaced the wiring harness on my 92 400E last year, I was missing a cylinder because a short circuit in the wiring harness, it cost me more than a $1000 only for part, Mercedes dealer claimed they never had any issue with the wiring harness.

BTW, I am in Ottawa, my 400E was originally delivered in Toronto in 1992.

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99 BMW 540i 6-speed 110K Km
03 SAAB 9-5 wagon 80K Km
92 400E (Sold) 245K km
Still missing the days with the Benz, it kept me busy.