Jeep 2012 Grand Cherokee - Owner Manual - Manual (Page 274)

3. The liftgate may be opened with the cargo cover in
place.
WARNING!
In a collision, a loose cargo cover in the vehicle could
cause injury. It could fly around in a sudden stop and
strike someone in the vehicle. Do not store the cargo
cover on the cargo floor or in the passenger compart-
ment. Remove the cover from the vehicle when taken
from its mounting. Do not store it in the vehicle.
Rear Cargo Cover
272 UNDERSTANDING THE FEATURES OF YOUR VEHICLE