Originally Posted by stan37
Terminals were checked and are OK. In fact, when I turn key, I get full power to everything (lights, radio, all dash warning lights,) except to start car.
to engage the starter, it has to have full power....how old is the battery, and did they check the connections at the starter...the only other area to look would be the ignition switch itself...good luck....but, the XF is very dependant on a good battery...voltage sensitive to all of it's sensors...if it isn't getting good power, the sensors cause strang things to happen. They can check voltage to different areas of the car...if they want to, but I would have them put a "load" on the battery to make sure it is at full strength. It doesn't take much to just light up gauges.