I am trying to decide between the Acura TL and MB C300 for a 3-year lease. The prices are nearly the same, though MB wants $4K down and less per month and Acura wants nothing down but more per month. MB offers free service during the lease but charges about $600 as a return fee. Acura charges for service but requires no return fee. Acura does have a superb XM radio/navigator system plus the back-up view assistance capability. MB has the XM but no navigator nor backup. Any comments would be appreciated.