jochen19 Said:
"MBP 15" 2016 Display Problems / Burn In: [...]Do you think this will still work and not create new issues because of the black bars?"
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Replacing the Screen:
With bars being there, you it seems you need to have the screen replaced. The entire screen is not filling up, as it should. So, get the screen replaced. When you call Apple, take a picture and show this to them.
Apple Support Info:
Note: Phone calls are taking a bit to go through at the moment, due to lots of calls. With the Coronavirus Pandemic, many are at home at the moment, with much time on their hands to contact Apple. So, just stay on the line, and you will get through :)
Screenshare with the Apple Rep:
To easily show the Apple Rep what is going on here, request a prompt for a screensharing session with the Apple Rep. That will allow them to see this firsthand, and upfront. Show this user through screensharing your Mac. Show them any paperwork and hover over your device, through the Photos app on your iPhone. If you have no iPhone handy, then ask someone else, if you may use their iPhone to perform this.