Maybe this might help in some way, maybe not
Some years back i wanted the cluster illumination to stay always on (was in winter so my mornings were dark) so i found the below. by default they only come on when parks are switched on...
See what options you get when you access this (i cant tell you as i dont have my car with me)
Open Controller
Security Access - 25327
[Adaption-10] > Change (1)-Illumination-Scale_switching_algorithm from parking_light to lds
** another thing comes to mind, would there be a light sensitivity option to change or tinker with? I think if you get this step right then you can change one of the light functions of the footwells to act as the dash illumination light.