location of crankshaft position sensor on 1990 Audi 80 Quattro

Can anyone help me find the location of the crankshaft position sensor?

Asked by for the 1990 Audi 80 Quattro
1 answer
it should be in the area the trans bolts to the engine on the upper drivers side. there are 2, one speed sensor, one reference (black and gray plugs) i thing the gray one is reference (position) sensor.