i cant get my tachometer to work in my 1980 280ce euro 4spd to '84 diesel turbo conversion. neither the '80 or the '84 have a tack amplifier on the driver side wheel well. i dont think there was ever an EGR controler on the 280 m110.

i have both tachs, all wiring and relays, including the kilma from the '84 w123
doner car.

does anyone know how i can set a working tach up?

don