Friends,
I have a new 5500 that has the backup camera mounted above the license plate of my tow body. Because of liability issues, Ram restricts the option for grid lines on the camera because there is no standard location for the camera. So, I ordered an OEM camera extension cable to move that camera to the headache rack of the tow body and going to mount an extra wireless camera I have where the OEM one was. I can turn the grid lines on and off on the wireless camera and use it to check the landing gear on the 5th wheel. That way, I can toggle between the observation camera on the back of the 5th wheel trailer and the backup camera at the license plate anytime and use the high mounted (OEM) one for hooking up the 5th wheel. There's a bit of a story of wanting to see the front landing gear. I've had both front legs and cylinders of the Lippert Level-Up system and had my Mobile Suites in the shop numerous times with legs collapsing while unhitched and extending while running down the road. Just two weeks ago, the front jacks completely collapsed inside my shop. I raised them back up and they've held no problems. I worked with Lippert and we could not find the problem. There are now internal or external leaks. So, in this camera config, I can periodically toggle the camera at the license plat to monitor the legs are up. Sad, but this unit has spent 7 months total on 4 occasions working on the leveling system. Sorry about the rant.
While researching the camera built into the CHMSL, I found it for $400, and you have to drop the rear headliner, route the wiring down the back, under the plastic molding, take the center console apart, remove the 8.4 or the other one, everything is plug and play, then use a programmer they provide to turn it on. Having the built in headache rack does give me an advantage for mounting the camera. I used a wired camera on my '09 4500 that had a sun visor monitor that worked great for hooking up the 5th wheel. I have aux fuel tank/toolbox that impedes looking through the rear window or using the rear view mirror.
Take Care,
Ron