 We bought one certified pre-owned 2009 E350 at MB Encino, California on 3/27/2010. Only drive about one month and 860 miles, there is a front tire pressure problem that was caused by a crack inside of the wheel (rim). We drive this new car very carefully, never hit anything since there is no damage on the outside wheel, also how to we hit or damage inside of the wheel? That is a  parts quality problem. MB's warranty should cover it but they don't. Please think about MB's wheel quality, before you plan to purchase a MB, since we found couple cases report about it already. Also, MB's customer service is not friendly, do not answer customer phone call, and do not care customer concern.