Before you spent more money, test coolant temperature sensor.
Also take off air filter and check for broken wires. German vehicles from the 80's have a very bad wires. With age PVC jacket became very stiff, breaking easily, exposing copper to air, then aging process in copper takes place, becomes brittle and corrodes. Keep this in mind when you work under the hood. Check first for the most obvious.
Last edited by kjsabat; 03-18-2003 at 10:05 AM.