e53 Diesel, Loud engine and Oil pressure light.

[tsotnek]

Hello, so I have e53 2002 diesel and I noticed that the engine is quite loud, also when I am driving for a long time especially when going uphill for example in the countryside, after 1.5 hours of driving the oil pressure warning light comes on and it is flickering when pushing the gas pedal, also the warning text comes on the dashboard telling me - "Stop engine oilpress!".

I have read online that this could be because of an oil pump, however, I want to know if anybody else has had the same problem with e53, or know if it could be caused by something else.

Any help is appreciated... the maintenance of this car has cost me thousands already...