Check the OVP first. This is a normal sign of a failing OVP or a Blown OVP fuse. I would start there as it is simple. The OVP in the W201 is located behind the plastic cover behind the battery. Red Top Silver Cased Relay with a Plastic fuse cover on the top.

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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....