Hello my a3 turbo is using or loosing coolant. cant find any signs of a leak. need some direction on where to find leak. no smoke out of exhaust, no fogged windows or coolant smell inside car. all input accepted with thanks .

Nick

 

On my 3.2 A3 I was losing anti freeze. Went and filled up then. For 40K service they discovered defect thermostat which was causing loss. Did NOT have any fluid on garage floor. It evidently would leak and engine heat would evaporate, but made a mess on engine block.

 

Pressure test the system, and look for leaks.