I had a Mercedes-Benz GLC 300. Recently I took it to the Keller Auto MB dealership for the computer programming update. Then, I was told that there were severe transmission oil leaks and it required a complete transmission oil pan and integrated parts replaced for over $850 (US). I could not believe that there would be sever leaks for only 15K miles. User's recommendation: Make sure if the problem real and file complaint so that they will look into the problem and fix it free for customers with such a low mileage use.