CJS71

the yellow is the constant live and red is switched. swap them over the red to a live with ignition.

VCDS originally called vagcom from rosstech is the best alternatively OBDeleven is much cheaper and has a lot of good features both them can program different features on your car if just a reader wanted the I've found OBD auto doctor a very reliable program with a cheap elm32 adapter

I'm taking it that your car doesn't have Bose.. I found the best way is to connect the positive rear speaker wires from your head unit to rear speakers then the negative side of your speakers connect straight to ground and don't connect the negative from your head unit rear speakers to anything. leaves the audio well balanced from front to rear.

love my Audi 2.0 TDI with just a few extra bhp. taken me over 120,000miles and counting.

hello, had my Audi for 12 years and still learning and playing looking forward to learning more cheers CJ