Hi Sherbs, I'll give you a little more info first. The problem started around October last year but was intermittent. I hear what Jules has said but as an ex loco engineer I know that the issue was the pads sticking to the discs. The problem became more common as the winter progressed. At this point note that I have winter wheels & tyres fitted (put on in October!). I put the sticking intermittenly down to the cold weather but noted that it only did it in the morning at home. The car is parked on an angled drive (approx 15deg) and when I pull in I stop the engine, put it into 1st gear and then apply the p/brake, the theory being it is less pressure on the p/brake.
I had the car serviced this January and asked prior to having it taken in to examine the brakes for the sticking problem. During inspection one of their technicians rang and advised that it is not what they thought i.e. salt causing a film on the pad/disc surface but the discs are showing signs of prmeature corrosion with grooving and they will take pictures and send them to Audi Uk for a possible warranty claim.
After getting the car back I left it for a couple of weeks (pads still sticking and I forgot to mention lack of response when first stopping!) and took a day trip to York a round trip of 130 miles. I did not use the car for the next 4 days and when I did there was no problem! Had the run cleaned up & freed everything off?
Anyway I rang the local dealership to ask if Audi Uk had responded but no one could recollect the conversation
. So, I was then back to the start of the original thread above, but, the Service manager had the car rechecked and agreed their was corrosion but showed me other Q3's and other models in and around the compound and they had slight corrsoion on the outer edges of the discs and he said this is normal but agreed to remove all pads, scrub the disc faces and reseat the pads with copper grease as they looked very dry which I agreed. All done free of charge.
The respnse from Audi Uk was quote" The exceptional weather cannot be their responsiblity and corrosion is to be expected. The service manager also advised that other models in the area had similar problems and this was put down to the large exposed brakes with winter alloy wheels combined with a consistently long period of very cold and damp weather.
Sorry for the long post.