For example, there is some debate on the Mercedes-Benz world Forum as to wind noise around the top of the new c class front windows. So the other day I decided to take the Z4 out for a same speed run because I thought that the car had much less wind noise than the C class however I did Notice it had just the same level of wind noise but you could hardly hear it over the road noise in the Z4. It just shows that the C class is so quiet in every other respect the wind noise becomes noticeable.