I am buying straight from the dealership as an approved used, so it will have all the documentation, warranty and servicing from the dealers. This is one thing that I am willing to pay a bit extra for. The -only- car I drove has 67k on the clock, but I thought diesels can handle this quite easily.

I am not that technical, what would constitute 'a good one'? I apologise for all these questions. As you might understand, I am under a lot of stress with a new baby coming and all...

Thanks once again!