My 2 year old 2.0 tdi is due its second inspection service at 38000 miles. I've been quoted £405 by the local Audi dealer and £215 from a local specialist. As the specialist uses genuine Audi parts it maintains the warranty and they say they can also update the digital service record with Audi. So I'm asking myself why would I use the dealer when they are nearly £200 more expensive.