My oil pressure reads about 1 3/4 when at idle and as soon as you accelerate the pressure goes up to the full 3. I have been told that it's normal it's a little lower at idle, but I have also been told that it should always be a 3. Can anyone confirm this? From doing a search it appears that it could be either the oil pressure sensor or the oil pump. Is there anyway to know which could be the problem? Btw: My car is a w124 94 E320.

Drive it - what you have described is perfectly normal.

It should drop to between 1 and 2 bar when hot at idle and go to 3 whenever you have your foot in the gas.

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Jim

Agree - sounds normal. Your owner's manual should tell you exactly what to expect. If/when it becomes abnormal it's almost always a bad sending unit - about $30 or $40.

Is not 30 or 40 is $74 prices have gone to the roof those days

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New Addition to the family
2013 Passat TDI 5Miles
2004 E500 4MATIC Wagon 95k
1996 E300 Diesel 173k Sold
1993 300E 2.8 230k Sold
1994 E320 White Wagon 373K Sold
Still dreaming about ....500E


Radu Negru

I agree that prices have gone through the roof - but it's still available for well under $40.

It depends on whether you get the VDO(oem) unit $70+
or the HamburgTech aftermarket unit $30+.
The owner's manual says 0.3 bar is Acceptable at idle.Unfortunately,my car ' oil pressure drops to zero at hot idle,(but peaks at 3 bar during hwy)This I was advised by a MB mechanic to leave alone and do nothing for 1 year so far.
I've got the Hamburgtech unit but have not bothered to install it yet.

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Tom 2010 C250 4-matic Sport (Canada)

never put aftermarket junk on my benz. It pays on long run.
If I will put aftermarket parts on my car, by 300K miles I will have a FORD....

__________________
New Addition to the family
2013 Passat TDI 5Miles
2004 E500 4MATIC Wagon 95k
1996 E300 Diesel 173k Sold
1993 300E 2.8 230k Sold
1994 E320 White Wagon 373K Sold
Still dreaming about ....500E


Radu Negru