I have an Audi A6 quattro Turbo 2003, and has been leaking coolant.
2 years ago we put 2 grand into it and had them take the engine out and repair all the hoses. Now the coolant is leaking. I took it back in and they looked around and did a temp pressure test and said they couldn't find anything. I had the coolant tank replaced thinking maybe it was coming from that. It is still currently leaking and seems to do so after the car has been running and on an incline.