The overvoltage protection system, is there to protect all of the electronic systems in the car which can be damaged by inductive or unregulated voltage spikes. It's a combination fuse and relay which has a sensing circuit that shunts or damps voltage spikes so they don't wreck all the computer modules in your MBZ's and cost you great volumes of $$$ and aggravation. If this component is not working properly, it can affect any number of systems in the car, including engine and fuel management systems. Can produce a ton of weird symptoms related to electrically controlled components.

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Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE

[This message has been edited by jeffsr (edited 10-20-2000).]