Hi Michael,

The rule of thumb is that, on average, a new car loses 50 per cent of its value over the first three years. Some cars do a little better than that, but not many and not by much, so I’d say your BMW is probably worth around €28-29,000 right now, assuming it's in excellent shape and you’ve kept it fully serviced. As for the other car, assuming you mean another BMW 520d, it will still be worth, probably, around €35-40,000 depending on the original spec. The best way to trade it in? Head into the dealer and don’t leave until you get the deal you’re happy with…