First problem with my 2016 ....just before taking the car in for the 15K check got a "check coolant " light on the dash. Had pre-flighted the engine compartment 200 miles/2days previously and found no issues. Coolant level had been stable for the first year of ownership. No drips or residue on the garage floor. Service Department checks during 15K service and says no leaks found and tops off the reservoir. 200 miles later, the reservoir is noticeably lower again. Return to dealer, recheck, same response. Service guy claims it could be evaporation (like evaporation just started three weeks ago). Swears up and down there's no coolant in the oil (head gasket problem). I suspect aliens have found a way to suck G13 out of the car as I drive down the road.