Summary

First gen. VW up! did not have the boot lamp even in the highest of trims. This is my remedy. It consists of a PIR LED lamp with batteries mounted on one of the hooks in the boot.

Glue the two parts together and mount the lamp with zip-ties. There are two holes in the front plate, those are for two M3 screws that will prevent the lamp to slide. I used "headless set screws", see image.

Just to be sure: you must print this in ABS, PETG or other high temperature plastic. PLA will not work and will melt in a vehicle. For ABS gluing I use nitro thinners to do that, altough acetone should work just as well.

Link to lamp: https://www.ebay.co.uk/itm/Kingavon-8-LED-Light-with-PIR-Sensor-Black-Garden-Garages/223068073254?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D225114%26meid%3D473b10bbe1b845529b5e03402743ca17%26pid%3D100227%26rk%3D4%26rkt%3D14%26sd%3D352309719033%26itm%3D223068073254%26pmt%3D1%26noa%3D0%26pg%3D2053904&_trksid=p2053904.c100227.m3827