Broadly speaking the XF is an excellent vehicle. The only downside is ,in my opinion, if you are only doing short trips of 5-10 miles a day for instance, don't get a diesel version as the DPF ( diesel particulate filter ) will eventually need cleaning out or replacing which is quite expensive. I add Millers DPF cleaner to my fuel every second fill and so far I have da no problems in the 2 years I have owned the car. As an A road, motorway cruiser they are unbeatable so if you are going to be doing motorway driving as well as town driving you will be fine . If only short trips/town driving, go for a petrol engine. Having said all that the XF is a quality vehicle and a joy to drive. I get about 37mpg locally and 50 mpg on a long run from my 2.2 litre.