I bought a second hand 3 se 1.8 last year, (4 years old) and at 54000 miles is due for its service. I could take it into the local audi dealership, in battersea , but heard that in general audi labour is overpriced. they quoted £360 before anything specific for a service. have also got a local garage in fulham who were recommended but don't necessarily specialise who do a service for about £200. am I missing a trick by going to the local cheaper garage? will this backfire on my service history when I want to sell it? any advice out there? many thanks