Jeep 2009 Grand Cherokee SRT - Owner Manual - Manual (Page 168)

3. The liftgate may be opened with the cargo cover in
place.
WARNING!
In an accident, 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
compartment. Remove the cover from the vehicle
when taken from its mounting. Do not store in the
vehicle.
Rear Cargo Cover
166 UNDERSTANDING THE FEATURES OF YOUR VEHICLE