Quote:
Originally Posted by DR.DIESEL
I had a similar issue with my mechanical oil pressure gauge on my 76 240d.
It was slow to read, then pow! 3 bar. I cleaned out the line and the
gauge itself to remove 30 year old oil sludge. All was fine afterwards.
Try that if nothing else works! 
DR.D |
This is what I was thinking was going on too...you could hook up a gauge directly to the fitting on the engine to test the theory but I'd bet it is your gauge that is faulty.