Quote:
Originally Posted by Ornery37
thanks for the info, but still new to Mercedes, where is the tach amp?
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In the 300sd it is a black round plug on the Driver's side fender well that unscrews. It has a small plastic strap that holds it in place.
Mine was giving intermittent results due to the plug inside not making contact with the socket. It turns out to that the plug's insulation shrinks leaving a space at the top of the plug.
Unscrew the plug and pull the inner plug out. Use something to fill the space. Some suggest a garden hose washer. Replace cap and this may fix your problem if its a loose tach amp.