Thanks - I'm coming from a Cooper S which gives 26mpg on a good day, so even if I go for the petrol, any improvement is an improvement.   I used to drive a Xsara HDi 90, which gave amazing MPG and mid-range acceleration so I know the benefits of that camp too. Decisions, decisions.   Did anyone go for the Navidrive option?...   There seems very limited information on it to read up on. I like the idea of being able to make hands-free calls AND have an integrated sat nav at the same time, I know its not bluetooth though.