Hi guys
Need some help, I have a a3 2l tdi on an 05, when start up I have a water sloshing sound behind the dash, and under acceleration. No over heating and very small coolant loose once every 3 or 4 weeks, no sign of head gasket with no water in oil, no overheating. Have read it could be heater core faulty but dont want to take dash apart to find out??