I've now completed five years of ownership. I am now at 49,700 miles. Only 2,900 per year. Other then normal maintenance and custom touches the XF has been trouble free except for replacing a microswitch on the spoiler. Since my battery is 5 years old I am now finding the spoiler in the up position occasionally when starting the engine but so far I have been able to lower it with the switch. Time for a new battery.