I purchased this model from a US 3rd Party in Feb 2020 at 40803 miles. They completed all their multipoint inspection, drove the car to an Audi dealership where it passed the inspection again. Come mid-March 2020 the pandemic hit and the car was in my parking lot 80% of the time. When I took the car to the Audi Dealership for servicing at 42800 K Miles, it was serviced but returned with the advice that Thermostate coolant was leaking. Both parties are not taking responsibility for this lapse that is going to cost me $890 at the Audi Dealership. What do the gurus of this forum recommend I do? I am tired of requesting the 3rd party honor their error & the Audi dealership keeps pushing me back to them as my warranty expired in mid May. I did not take the extended warranty from the 3rd party at the time of purchase trusting "German Engineering"