Thanks. I found two on e-bay with the same part number (124 542 01 05), but the MB EPC shows a different part number for my car (A 000 542 72 27). One was $25 and the other $36. Maybe I should check the dealer and see what their price is too. It would put the risk on them if they gave me the wrong part.

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1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles