Complete Interior swap from 2000 a4 in 98 a4
 

I just purchased a 2000 a4 donor car with super clean interior to swap in my 98. The 2000 has heated power leather seats and my 98 has manual heated seats.The 2000 being a facelift car has alot more features than my 98 like symphony radio...bose audio...door speakers ..sunroof controls etc. Can I swap the entire interior harness so I can make all these functions work in the 98? I already have the dash out of both cars..

As you've got both cars, then there's no reason why everything shouldn't work. It's a lot of work, hours, but very feasible.