Hello AJMW,
So, I did a little more research on your issue. In the details panel of your Scene Capture 2D there is a a post processing section.
Tweaking the eye adaptation/auto exposure will help keep your lighting at a steady level. If you go to the auto exposure section and st your min Brightness/Max Brightness and your Exposure Bias all to one that will help.
Also it appears that your car has tinted windows. You may try changing just how dark those windows are. So the issue could lie that you are in a shadow looking through tinted windows.
Let me know if this helps.
Thanks,