hi, i was recently put in touch with a mobile mechanic, its a father and son team who came out this morning to my door and fitted a cambelt kit and water pump to my 1.9tdi engine. they also cleaned out the intercooler because the fins were blocked with alot of dirt. they were very nice people, they completed the job in only 2.5 hours that included cleaning the intercooler and re-aligning the lower front bumper as it was out of alignment since ive owned the car. total cost was £250 ! absolute bargain and all while you wait in the comfort of your own home. the audi also had an very lumpy idle before they came which has been getting worse, the idle is now perfect and the turbo boosts better from lower rpm. they also noticed that something had been rubbing against the intercooler so they fixed that aswell before it rubbed through it if anyone is interested in this pm me and i will supply you with their company name and phone number. i beleive that they work around north east england only but could be wrong.