Hi everyone, I have an 2010 audi a4 2.0t. Recently it has been giving me a few issues and I'm not too sure what the problem is.

Issue 1: there is a lot of engine noise coming from the car, especially when it is in idle. When I accelerate the sound goes away to a certain extent and the noise does decrease. I noticed that when this sound gets louder whenever I get the message "please stop vehicle and check oil level". I've had this sign come on constantly after I break and come to a full stop, or if I make a turn and accelerate ive even had the car just shut off. Today the noise was there and I put half a litre of engine oil in and the sound goes away. Whenever this sign comes on I put just a small amount of oil in and it stops coming on. What I'm afraid of is why does that sound get very loud and is there a oil leak?

Issue 2: recently the EPC sign comes on randomly and I feel the car has very little throttle. This sign also comes on more often when my oil is low. The other day I was driving and I made a turn down my street and right away my car turn off, the sign came on "please stop vehicle and check oil". So I put the car in park and re started it. Sometimes it's as if the problem isn't there, and then all of a sudden it is. Its like driving two different cars.

The car is only 115000 km driven on it.