Other Fuel System Tank Assembly problems of the 2016 Volkswagen Jetta

Ever since I purchased my vehicle one year ago, I noticed that my car has trouble starting. It is a push-to-start car, and sometimes it cuts off and I have to push the button to have it restart. It happens during all types of weather, and I've had the batter tested at the dealership and it was in good standing, and they couldn't figure out what was wrong with it. I've also had to replace the tires multiple times over this last one year of having the car. The first time I had to do that was literally within two weeks of buying the car. Furthermore, the range feature that gives you an automatic reading of the gas gauge is inaccurate. When I fill up the tank if sometimes reads over 300 miles, and then sometimes it reads over 400; and then when the gas is low and nearing empty, it notifies me at 30 miles left till empty but then rapidly drops to 15 or less by increments of 5.