NOT TRUE.. not true. my is250 is 3 years old, and I am getting all kind of noise in the car. family have MB/ BMW for many years all car will have wear and tear issue. But Lexus had been trouble free for 3 years. I had more problem with my e46 M3 in 6 months than 3 years of IS250.
PS: IS250 is 160W VS C280 240W. you will get a better car with 240w