Thanks for the insight.

Here is the scenario:

All is fine with the car. My wife is driving it and all of the guages, except the speedometer goes out. She drives the car home and parks it. I try to start the car and it will not crank. The radio works, the head lights work, but car will not crank. I hear a noise (it almost sounds like the a/c fan) coming from the engine compartment. The noise emanates from the fuse box and the relay box. No fuses are blown however.

Any more detail needed?

Thanks.

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1995 E 320 119,000
1983 300 TD 285,000 (sold)
1973 220D (sold)