I think the Audi technicians in my area definitely won't notice anything. Girlfriends 95 A4 had the coolant warning light on one day on the way to the Audi dealer for some work, so we asked them to check that too whilst they had the bonnet open. They failed to spot that the coolant tank was near empty and told me that I needed a new coolant temp sensor quoting me £100 to fit... I did it myself in 5 mins costing £25 (old black sensor) and then found that the tank was empty myself, I didn't check b4 cos' I trusted that they would have spotted that if it was this simple! They only just "checked" it last week and I could have saved that 25 even... bunch of muppets really! They're either incompetent or dishonest, either way they deserve some serious bashing.