I bought my 2009 335xi in August after driving my C70 Volvo into the ground with 173k on it. The volvo was a sled compared to this beauty. This car is not problem free! I have had the car in four times for warranty and I'm still not happy. First check engine light " miss fire " second time bad high pressure fuel pump, third time, mechanical fuel pump. Turn on the intermittent wiper and listen to the relay click under the dash. Dealer says that's normal. Then the seat belt arm shorted out. So they replaced that. I just bought 4 Toyota Yaris for my delivery fleet and they are quieter than this BMW. Dealer said get use to the noises I said are you kidding me !!
raise the seat belt buckle up higher, work on all the noises in the car, install dust free brake pads, install better quality parts