Joshua, what are the symptoms?
Does it turn over? not to say that you SHOULD do this
Does the fuel pump prime/whine?
Do the headlights flick down then up upon turning of key from OFF to ACC?
Inspection covers should be relatively easy to remove, not to say that I have ever had to remove them.
There are so many sensors on these cars that it could be one or more.
Would it be worth it to have an Audi dealer plug in the giant Gameboy and scan?