A few years ago I bought an 03 A6 3.0 and I love the car except it came with a few problems. The car jerks when it runs between 1500 rmp and 2000. Also it the car shuts off and I have to pull the battery poles out to "reset" the car and it'll work fine again for a while. Recently the car has been shutting off more frequently and I have no idea how to fix this. help?

I also took the car to be diagnosed and it came back with problems with the powertrain control module modulators, a vacuum leak, injector faults, and high/low fuel pressure

 

Can you get it re-scanned and post the actual codes? That'll help narrow down the issues.