Congratulations on your purchase - I bought a 2015 GLK 350 4Matic in March 2015. 98,000 miles on it so far with some pretty tough driving in the mountains and back roads going to the cabin each weekend, as well as numerous cross-country trips. Not a single problem to date...knock on burl walnut wood trim! Just regular A and B service...and recently started third set of tires. Just bought a 2019 GLC 300 4Matic as a back-up!!