My oil pressure gauge is always above 3 on my 88 560SEL. Soon as I turn the ignition on it goes to 3, when the engine starts it stays, and even after driving it stays. I am assuming the sender is bad or the guy that sold me the car rigged it to hide low oil pressure. What I need to know is where is the sender on the engine?

Thanks
David
88 560SEL
67 European Beetle
69 Conv. Beetle
00 Dodge Durango

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David
1988 560SEL, Green, Chrome wheels.
2000 Suburban, 20" wheels, DVD, wood grain dash (wife's car).
67 Beetle euro, Lots of Empi parts.
69 Beetle conv, 1980s cal look.