I have a 1999 audi A4 2.8 w/Q and I need to put in a new alternator can anyone help me with like a step by step or even know whats involved just to get to it?

 

I don't know where it is on that engine so I can't give you overly specific procedures, but here's a pretty general procedure:

-Disconnect the battery negative and cover over the negative terminal just in case
-Remove engine cover if applicable
-Remove the accessory belt by putting a serpentine belt tool (or ratchet if you have the room) over the tensioner and removing tension, then slipping the belt off
-Find the alternator (they're pretty easy to spot) and disconnect all wires - try not to let any of them touch any metal because that will short out the electronics in the car, usually won't damage them but it could
-Remove the bolts from the alternator - generally about 3 - and remove it

-Installation is the reverse