OK,
I'm alittle slow. My tach has been working off and on for sometime now. Did the search for the sending unit on the left fender and al(l with no luck I may add). Am I looking in the right place or can someone post a picture. Was brought to my attention that the sending unit is on the lower front of the motor by the crank pulley. Is this so? Funny, can do a valve guide and seal job, but cant seem to get my tach or my horn to work. Go figure.

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Richie
1986 300E

I'm not sure I have a lot of help for you, but here's what I know:

- the box on the left fender is the ignition controller. It has 4 or 5 connectors on it; 2-3 small ones and 2 big ones. One of the small connectors is a coax. That's the one that comes from the inductive sensor at the crank pulley.

- the inductive sensor is about at the 1 o'clock position above the crank pulley... I think.

If the engine runs, I doubt the problem is with the sensor or the sensor cable.

Sixto
91 300SE
87 300SDL
81 300SD

Thanks Sixto,

I' give it a look to see what I come up with.

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Richie
1986 300E