Hi,
Can't vouch for Aberdeen or Inverness but I've used the Dundee dealer once and was happy with the service.....had Auto Gearbox oil change carried out there and was cheapest price I could get from a main dealer.
I stood and watched them do it instead of enjoying the free tea, coffee and lifestyle magazines!
I'm not a big fan of the Arnold Clark dealerships in general and don't use them as a rule after a bad experience many years ago, but this was fine.
If there was a decent Indy hear her I'd probably use it with my E Class coming up for 4 yrs old in June.
Colin