The Lexus will only cost you oil changes, tires, filters and brakes. It will run perfect for many years. The BMW will be in the shop constantly. The Mercedes is like throwing your money out the window for routine maintenance.
I had Toyota that had one repair in 17 years for a water pump. The basic routine maintenance I did myself. I sold that car and the kid driving it had put on so many miles without any trouble. The Lexus is a fancy Camry. It should run perfect if you just change the oil with Mobil one every 5K.