I bought my xf about 8months and took it to jaguar garage to have software update loaded to car, ever since then had alot of problems with the car so i took it back to jaguar for them to sought problem out, and the problem was the dpf had been removed so i had to pay the £2000 to be put back in. running a dream now,so if i decide to buy another jag ill make sure that i dont get stung again ie dpf.