Sorry to revive this thread after a month but I'm still dealing with the coolant leak problem...

It's now become more severe and I'm losing coolant daily. The mechanic has since replaced the water pump but the leak returned the next day. He has now said it is the feeder pipes and that he has a feeling it could be due to bad pressure and ultimately a head gasket problem.

After arriving home today after picking the car back up from the garage I checked the coolant and it was at least double the amount that should be in the bottle... well over the max line and almost at the cap?!?! Would this not cause more problems with pressure as it now has no space to breath and will force the excess coolant out at the weakest point?

I've cut my loses with the current garage as it's almost 2 months wasted and still no repair. I've booked it in with an official Audi dealer next week and hopefully they don't come to the same conclusion...really don't fancy replacing the head gasket

Any help would be much appreciated.