I had this same question with the Chrysler dealer about two weeks ago. On mine, if the steering is centered, it is tight. If you turn the steering one rev left or right there is about an inch or two of play. The Chrysler/Crossfire tech was not sure so he said he called the "experts" at Chrysler corporate. They said that with the kind of steering used on the XF, it is normal for it to have play when turned and the car stopped. The steering should be tight and not wander while moving though. I have a few curves around home and gave it whirl. The steering is tight even in the turns.

If you have play in the steering while centered, then you need to have it checked.

Hope this helps.