Folks,

I'm working on a new project, an '84 190D 2.2 5 Speed. This car has some interesting electrical problems, PO destroyed the dash attempting to install a bigger stereo. Luckily I also have an '85 190E 2.3 to rob parts from. I also have purchased a Tech Manual from e-Bay.....helpful but not an MB manual.

What drives the Tachometer on these cars????

I have pulled out the Instrument Cluster, and it does not appear to be a mechanical tach. If it's electrical there are several ways that I know of to drive a tach......Alternator......Flywheel Teeth......Pickup on Harmonic Balancer / Pulley......but I haven't a decent schematic that I can find a Tachometer pickup on.

I have asked this question over at "190 Revolution" a week or so ago and there hasn't been any reply.......I followed a DIY link from here and thought that there would be a bunch of specific knowledge over there......not a lot of technical knowledge in evidence........

Thanx,
SB

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Diesels:
'85 300D, "Max, Blue Benz", 155K, 27.0 MPG
'84 190D 2.2, "Eva, Brown Benz", 142K, 40.2 MPG
'77 240D (parts car)
'67 Eicher ES 202 Tractor "Otto" (2cyl, Air Cooled, 30HP)
Gassers:
'94 Ford F-150, "Henry", 170K (300 Six) 17.5 MPG
'85 190E 2.3, 148K....Parts Car
'58 Dodge W300M Powerwagon (Flat Fenders) Less than 10 MPG