Originally Posted by Pacemaker
Two things: A "sprinkler hose" one of those flattish multi tube hoses with small holes all over the top of the hose placed in long coils under the car makes a great belly wash. Also, a trucker I used to drive with taught me that you should go into Neutral if you have any idea that you may slide in a stopping situation. Works well on the XF so far. No sideways funhouse stuff on these icy TN. hills (yet).
Thanks folks, for all the other help. This is a GREAT forum! 
Part of your tip was added. As far as the neutral thing..... this would be in my opinion completely useless on the automatics and maybe somewhat helpful for the manuals.