This article is from the Chrysler-Plymouth-Dodge FAQ, by Dr. David Zatz with numerous contributions by others.
Bob Jaworski says rattles in the back may be cured by getting the rear
shocks replaced - there is a recall or TSB on this. If your middle seat is
rattling: the hook that holds the seat in may be loose. Crinkling sound
from the steering wheel: Resolved by readjusting column housing