@Skello welcome here!
Yes, you can make it work properly again, by:
-taking out your METIN box
-watch closely RH from your seat-lock
-there is a small square switch which initiates your undertray light
-spray some WD 40 or similar in it
Works?
- if not, take this switch out, using a small blade from RH side to unlock
Pls give a feedback.