I have a C4 Grand Picasso which will be three years old next month. I bought it with 18 months warranty left. It's served us well and we're really happy with it, the seven seats are something we use occasionally and when we do they are invaluable. Should we trade it in and get a new car (if so what do you recommend?) or stick with it? I'm keen to keep the value of the car we own up, if you see what I mean.