My car is a Mercedes-Benz A220 CDI auto. It has most optional extras and I've owned it from new. It's done 15,000 miles and will soon need an MoT, major servicing and two new tyres. Whilst I have enjoyed the car, I'm wondering if I should trade-in the car since it will soon be out of warranty and other purchased warranties (wheel and tyre damage, GAP insurance, paintwork protection) will have lapsed. The car could soon start costing money for all sorts of things previously covered. The other factor which is beginning to weigh heavily is the fact that my car has a diesel engine. Any advice, please?