Just noticed that my car does not sit level ! It is a 09XFSC and is exactly 1/4 inch lower, both front and back, on the passenger side. I have noticed some body sgweeks on that side in the rear. Does this leaning seem normal ?

 

Further investigation shows that the wheel centers are all the same height from the ground, so the fender attachments are the culprits. The left rear fender might have been involved in a past incident which would explain the slight sqweeking so how do you quiet the attachment points for that fender ?

 

Entire side of the XF is one pressing from bumper to bumper. Only the front fenders bolt on afterwards. If the rear fender was replaced it was cut out and new welded in.

The wheel centers will always be the same height all around assuming the tires are all the same pressure. What you need to measure is the spring length on level ground. If the springs are the same length left to right then the ride height must be the same left to right.

 

Did you check the tire pressures?