I am not familure with my TL 100% yet as I have owned the car for a week.

I was rotating my tires with the car on jackstands with the ebrake on & the car in park. While tightening my lugnuts I noticed the rear passenger wheel rotated slightly about 4-5 inches before it locked in place. The drivers side rear wheel did not have this play. I don't believe this is normal, however I can be wrong.
There is no indication of a problem & the car only has 6k on it.

Anyone else notice this ?

I need to get a helms manual for this bitch :-p

 

i rotate my own tires and have not had this issue at all. since you say you have the car in park, i guess you own an AT as well right?

 

It's probably normal.
I have the 6mt, and my garage has a small incline. The car rolls an inch or two before it stops when I set the E-brake. It was different from side-to-side when you were rotating the tires, because you were turning the tires in differen directions. I believe the TL's e-brake is a drum system inside the disc that you see from the outside of the wheel. Drum systems can have this directional difference.
Mike