My father thinking of getting a special car he always wanted but could never afford when it was new. One is a 2008 BMW X5 (3000cc) and the other is Mercedes CLS (3500cc) 2008 model. His daily car for work is a Toyota Prius which is 6 years old. No way would he consider VW because of their problems. Which is a better choice: The Mercedes CLS350 or BMW X5?