Just traded my 128i for a CPO 235i. Great car except for ride noise. There seems to be something that rattles around, sounds like a loose component. The service tech at BMW drove it with me and assured me that the suspension on this car, along with the run flats transmit all the noise I'm hearing. But it's not the somewhat bumpy ride that bothers me, or the tire harmonics. something just sounds loose. I can't believe this is normal for a BMW like this. Anyone have any experience with this car that would shed some light? Furthermore, would replacing the Pirelli P7 run flats with Michelin super sports feel significantly different?