I had a beautiful S-Type for 7 years until it developed a diferential fault. My dealer informed me that it was going to be very expensive to repair needing a new prop shaft, diff and drive shafts - almost as much as it was worth. They offered me what I thought was a good trade-in price for a 2½ year old XF in the same colour - red, which I just love. My wife and her cousin both previously said thay didn't like the look of an XF - "Doesn't look like a Jaguar" they said so I had stuck with the S-Type for all those years and would have kept it forever if it hadn't become BER. I must say it was a great move, 2.2 diesel, road tax £145, 57 MPG and fantastic technology which is great for a tech freak like me! What I am saying here is, that if the time comes for you to trade in your X or S-Type, embrace the XF, it is a fantastic car and I am so happy to have it.