Okay group, I've got another issue going on. I'm hearing a rattling sound, that I can only best describe as someone rattling a paint can. This only happens when the XF is under load between 1st and 4th gear before it's at full temp. Once the car is at full temp the sound is gone. I was originally thinking that it could be the cat going out because it seams to be coming from under and slightly to the rear of the car, then after searching through the other posts was thinking maybe a heat shield or maybe the exhaust hangers.
Any suggestions?