well audi charge by the hour usually but a bit of haggling then they will do for 30 mins, but if you know them well they might do a quick read for free, but usually what approx £100 a hour, but find someone in your area with VCDS then most would help you & read for free or beer, but you could always get a genuine cable for your car which allows you to do it all now & future by yourself, its 2.5 hours worth of audi charges so very much worth it & audi's comparable unit is 5k, so you can see the deal is pretty good.
I have a group buy running if you're interested for £228.75 for the full genuine cable.
PM if interested or check the stickies for local VCDS users
If its the v3/4 leads then pointless cause there so outdated, ye basic checks but wont allow you to do much at all
& also if counterfeit, real good advice, they use old outdated software, dont allow access to all modules, go wrong easily & can possibly cause issues with car modules, so in end a £60 lead costs you alot more money & no doubt RT will stop illegal leads from being used, so is it really cheap & worthwhile???
If you're considering buying then go genuine, yes I have offered a group buy but no profit in it for me as you can easily find out yourself, just helping others get the cable etc easier & in one place & fedup seeing counterfeits on market.
If you promote counterfeits the Thread will be closed as they are cracking down on these things now & justifyably so, after all its there bread & butter at RT
Compare, Audi's 5051/52 is £5k, RT's tool £230ish, urrrm
I bought a "counterfeit" lead from ebay - it is the one with the buffering in it so it cost about 30 quid (not the cheapest) and it has worked fine with my a4 and a6 over the last few years. A demo copy of vag-com will come with it usually and it will allow you to see all the error codes and do basic resets and module programming... though with the latter be very careful about what you are doing.
PM me if you're still interested and I'll see if I can't dig out the seller's ID - won't post it on here as I'm not in the habit of advertising for someone else.