I currently have a 13-plate S-Class (long wheel base). Today, while at the local dealer they had a 2015 S-Class (non the long wheel base version, which I prefer). I currently pay £270 a month for my car...to upgrade, I have a little equity and then my monthly payments will nearly double. In my mind, I'm thinking: newer car, less problems, possibly cheaper to run...but at the same time, it's a lot more monthly. I also much prefer the non-long wheel base version. Should I spend more and upgrade now or just stick with what I have got?!?