Hello,I'm just about to fit a towbar to my 2004 A3 hatch, and was wandering whether to use the genine Audi wiring kit or use an aftermarket kit e.g Towsure. Has anybody had any experiance fitting these kits? Just spoke to the Audi dealer and they seem a bit vague, and even told me that they have never sold one. Cheers for any advise giving. Regards Scott.