i just bought a c 300 sport and is it normal for the alloy rims to get dirty quickly? im constantly cleaning them. what can i use to make them stay clean? help please! thanks

 

I have the same issue with my C 320 sport wagon. The problem is the brake pads are of a soft material which deteroriates at a rapid pace. If you replace them with a firmer pad, you may prevent some of the dust from going on the wheel. But, you will probably diminish the quality of the brakeing system, which can create a slower stop.