I would first suspect a bad OVP (over-voltage protection) relay. A bad OVP will cause many things to happen - a non-starting problem, an idle problem, will cause your ABS and ASR lights to come on, will cause fault codes, etc. Check your OVP for the known bad part number, 000-540-52-45. If that is the part number on you ovp, get the new updated OVP - replacement number 000-540-67-45.

The OVP is behind the black plastic cover on the firewall side of the battery. You shouldn't be able to see it unless you remove the plastic cover.

It is silver (aluminum), has a clear plastic flip top on it, and has a tab on the both side of the canister for securing it to the mounting hole.

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95 E320 Cabriolet, 169K