IAuto Coventry branch actually mainly do MOTs, they do very little servicing work. If any work it's on German, non-VAG cars.
The Solihull branch do few MOTs, more servicing. They mainly they work on Mercedes, BMW & Porsche (Cayennes) and seem to do a fairly good job. However they only have one VAG mechanic who is HOPELESS! He isn't very knowledgeable on modern VAG engines (only older ones - didn't realise I'd removed my HPFP on TFSI engine); so won't know how to fix or service your car properly; can't use a diagnostics machine (I was showing him); may break stuff (broke my front bumper top mount bolts); or damage your car (bulkhead paint heavily scratched requiring respray) & then not mention it; spend 5x or more the time trying to fix things at '50% less than dealer labour rates' so bill is still huge; not own the correct VAG tools (had to buy new ones); not own a mechanics stethoscope or be able to diagnose obvious bearing failure (bought my own). Oh dear!
I can't actually recommend Midland VW in Cannock either, I've experienced their incompetance at my huge cost too. If a complete engine out/swap in a rebuilt engine means you have to ask them to fit serviceable items to guarantee reliability -then they forget to fit a new cam belt tensioner, ignore a rusting metal fixed water coolant pipe, miss out bolts to your propshaft, don't bother tracking your suspension AT ALL afterwards, charge a huge bill (grossly overcharging for new engine mounts) then you can imagine the hell I suffered afterwards!! I broke that car afterwards, so found every mistake they made....
I also have tried Wizard Works, Hollywood (test drove my car very hard, also without my permission); Central VW, Castle Vale (bad attitude); Deutche Technik, Sparkhill (cowboys); V Hub, Tewkesbury ('TFSI specialists' with a mechanic with no TFSI knowledge or training) to name a few, also best avoided, many mistakes made (at my cost again!). You have been warned!
I can recommend Lee Round (a customer of mine, plus done some great work for Joe), plus Badger 5, Gloucester. In the past 3 years I've met in the region of 90 or more Audi S3 or TT owners, those who have used Badger 5 agree that their work is excellent.I've inspected his work on the vehicles I've seen and can confirm this!
Alistair