I bought my XF 2.2 just short of 6 months ago. The dealer (Citroen dealership) had tried to rectify a problem on the dif but whatever they did, didn't work culminating in a very loud bang whilst I was bomming down the motorway and an intense grinding noise thereafter. Fortunately, the Jag was only 1:3 into its warranty and the dealer fitted a new dif. All now seems well with this issue 5 months on (but I'm not holding my breath).
There is however a further repetitive fault. If I am doing a lot of stop / start driving, the engine gets rather warm (hot). When this happens performance drops through the floor and I have to drive with the paddles and rev high before changing gear to avoid a desperate limp. if I let The jag cool for a few hours, performance returns until things get hot again, when the fault becomes apparent again.
The dealer (perhaps being coy) didn't have a clue what the problem is. They did a test drive and said that they couldn't find a fault (a likely story). Over winter, the problem didn't show up quite as much but now that the weather is changing, the fault is becoming more prevalent.
Anybody got any ideas what the problem is and what the solution may be?
many thanks and B.W.