Neither the E class or the Series 5 is considered a cheap car to own. Where one is better is offset by where it is worse dollar wise. They are both going to loose half their value in depreciation in 5 years or less (31000 dollars average). If you added just 7000 dollars to what you are going to loose in money and invested that in a Ford SHO (2010 model) you would be money ahead and have a faster more reliable car.
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