My 2015 c220d premier plus estate with privacy glass, air-matic suspension, in brilliant blue, totally unmarked with 12300 miles on the clock. I have a real dilemma as its going to cost me £20k to keep it, plus £430 for A4 Service and mot, plus tyres in the near future. I scared that its value will plummet with the diesel stigma, plus the scandal of Mercedes emissions now coming to light. I love the car but is it really worth paying £20k for it. Please give some sensible suggestions as I'm starting to worry about it.