I just purchased a 2018 Foretravel Realm LVB. There is a small locked panel on the rear passenger quarter panel at the rear of the coach for which none of my keys will open. I suspect it may unlock the mechanism to open the panel to the chassis batteries. I see no lever to open that rear panel. Here is a photo of the door with lock (the coach is dirty after a severe rainstorm):
Believe it's the def fluid access door
Congrats on your new to you coach. If you have not done so, need to join the Motorcade Club. It will give you 10% discount on parts and service from FOT & MOT
Also Join the Facebook Motorcade and just the Foretravel Groups.
I agree, the door is for the DEF fill up.
You need to get a key since if you get low on DEF you can be stuck where you are at unless you want to do down the road at 5 mph. On my coach the key that works the gas lids also works the Def Lid.
Thank you for the responses. The former owner replaced the locks on the driver and passenger side fuel doors and the driver's side DEF door with toggles. I have joined the Motorcade Club but don't do Facebook. My wife does so I may have to creep on her Facebook.