I have a 1998 audi a4 and I have a 1998 audi a6 parts car laying around. I need a new water pump, headlight, purge valve, thermostat, and drivers seat. Before I go tearing into my a6 I wanted to know will any of that even transfer over to my a4 from the a6? They both have the 2.8 v6 and are both quattro. Only difference is the a6 is the hatch back.