Five to six years back I bought a Golf tdi and as well as a number of other electrical faults, the central locking only worked on 2 not all 4 doors. The manual is not exactly helpful either. if this is a new car then your dealer really needs to to sort it out and the chips need to be re-programmed but sometimes you can try a couple of things first that some people have found out through experience. When the magic words were mentioned "pdi fails" all I got was "duuuhhhh?" Says it all, really!
The 'footwell' lighting settings are these days, apparently, found through the 'vehicle settings' menu using the infotainment screen. Where else?
Apparently, they can be from a setting of "off" to graded levels up to 100% On. See if you can find this in the manual and try to carry out the adjustment for yourself. If not, then its back to the dealer, I fear!
My latest car has "footwell" lighting. They call it it "mood lighting" - Ha! It makes my feet look like two cornish pasties in a microwave oven. Suffice to say I have disconnected the damn things since at night time it is so bright it has a distracting effect and affects visibility.
Good Luck!