I believe a 94 W202 still used an Overvoltage Relay. This relay is a silver box with 1 maybe 2 fuses in the top of it. It supplies voltage to the engine control "LH-HFM" and ABS control modules. It is located on right side rear of engine compartment under the black cover near the X11/4 connector, the OBD connector . Try tapping on the relay and see if the car stalls. If it does, thats your problem.