My 2015 2.0TDI 150 PS DSG had the light for low coolant come on so I booked it in with the main dealer. It is second hand and two months out of the guarantee . Later that day they rang me to say the problem was that the heater matrix was blocked and the bill would be over £1300 pounds, but as a goodwill gesture they would deduct 45% Bringing it down to £706.97. My job before retirement being a company engineer responsible for field liability claims resolution, on pressuries boiler