Ok I'm new to this car, and to MB in general, but have worked on many vw and other makes. I have a friends car on which the oil pressure gauge stays at 45 (3 bar). Its a 1978 300 cd. I just reattached one of the sender wires on the top drivers side sender. It was broken, but clearly didn't fix the problem. Where is the oil pressure sender on that year diesel?
Thanks for the tips,
Vince