well left rear stop light it the left rear brake light.
so if its working then either its a mistake, the bulb has since been replaced?
just check all the lights, if they work then there is nothing wrong.
how many lights are there at the left rear? not many
normal light,
brake light
reversing light
fog light
indicator
Good news now let the modifying begin!!!!
haha. first up the Fabia wiper!