Ok so iv bought a 118D my first question is what is the difference regarding the engines between the 118d and 120d models? I'm assuming there mostly the same hardware wise and its mainly mapping where the increase is? Second question is what suggestions do you guys have for straight swop for standard CD player? Again I assume there was a high spec model with sat nav, iPod, ect? No doubt ill have more questions the more familiar I get with car.