How do you remove the rear bumper cover on a 2006 Chrysler 300?

It's a pretty easy process.

There are plastic retainers holding the bumper cover on right where the trunk closes at. Then there are a few in each wheel well. And there are some on the bottom of the bumper cover.

The best place to start is by taking out the bottom ones. Then the ones inside the rear fenders on each side. Then the top ones, then you should be able to then slide the bumper away from the body of the car. For extra wiggle room, you can remove the rear tail lights, this will especially help during installation. It's a straight forward job and pretty easy to do, no more than 30 min.

If you have chrome trim to transfer, then you'll spend time trying to not break the clips and will add some time to the job.