I have longlife servicing on an Audi diesel and if you don’t feel comfortable with an independent service here’s a couple of tips:
1. Ask for pricing without oil and supply your own. The stealers charge a fortune for the premium oil that must be used in these types of engines. Cheapest place is National Tyres. Make sure you get the correct spec – it’ll be in the handbook and be something like 505 or 506. To give you an idea Audi charge about 70-80 quid for something that costs 30 quid at National. You’ll need 4 litres. Halfords will charge 40 quid.
2. Ring around and get the best price (without oil) within a certain radius. Then call back your preferred garage and ask them to price match. They all charge different amounts for labour and in my experience, the less ‘city-centre’ they are, the cheaper they are.