Need someone with a vag-com cable to help me out and add a few simple mods. Will compensate you for your time.

 

I'm looking at buying one but not until the middle of June. If you're not in rush I'd be happy to help. I have a 2001 TT and I'm not sure if the cables are compatible?

 

Paul,
I have an old chineese one I bought a few years ago when I got my B6 S4 and an original Rosstech cable I just got this winter for my 2008 TT (MK2). So this is my experience with the VAG-COM cable on the MK1 TT:
My brother has a 2004 TT like yours and there is very little modifications he can do on his car even with the original VAG-COM. He was quite disapointed this winter when I got the original cable as he though he could do a lot more to the car. He currently has my chineese cable as it can read the fault codes as well as the original...
I would suggest you read on it before investing $350 on a cable that will give you very little access to the TT MK1 control modules and can read fault codes the same as a $25 cable. Just my 2cents...

 

Thanks for the heads up on this. I was going to do some research and was putting off buying one until I had some more information.
I'll make sure I dig deeper into this.