I purchased a 2013 c250 as a Certified pre-owned car. The carfax report was clear, one owner no accidents. The Mercedes dealer provided the CPO checklist. I have had the car 2 years and have only driven it 700 miles. It drives beautifully. When i took it in for the annual service this year my local dealer claims it needs spark plugs, brake fluid replacement AND new motor mounts! $1500! How can a car go from passing all CPO items and 700 miles later need all this work? New spark plugs? The car has ONLY 6900 miles. Yes 6900 not 69,000.