i think my xf is defective and i've only had it three days! in the first 24 hours the brakes rarely functioned and she traveled over 950 miles. to make matters worse, the accelerator is finicky and needs major adjustment. i can't keep it at the posted speed limit. i even had to run over a road hazard to cause a flat tire just to get the thing to stop for a rest. i also think something is terribly wrong with the exterior. people keep pointing at the car or pull up alongside and stare. i think maybe it's that broken piece of sheet metal that separates from the car when i hit about 65 mph.