Rick there are numerous threads regarding this:
http://www.cslregister.com/forum/sea...earchid=681507
Primarily it's the back of the front seats, scuffs from taking passengers/putting objects on the back seats etc.
The rear seats, where they fold to the rear console resulting in scuffs to seat cheeks, scuffs from the seat belts and scuffs to the console.
Basically it's all areas covered in the rubberised/plastidip type paint, that members have previously expressed concerns about in the numerous referred to above.
No E21? - No collection can be complete without one!