Is it the oil pressure sender or the guage (or nothing)?
On my 1985 500SEL, the oil pressure guage jumps to the top as soon as the key is in the number 2 position and does not move until the key is turned off, whether the engine is running or not. What voltage range should there be to the guage? Could it be the sender?
1985 500SEL (260,000 miles) SOLD!
1974 280 SOLD!
1994 Volvo 850 Turbo Wagon (Yuppie Ice Sled)
"I know I have a Benz and they know it too." If you start bragging about it or shoving in people's face, you then become a Wally; especially to the girls.