What a mission!
Just had to fix my lights (had a headlight, brake light, and the reverse light blown)..
Reverse light has never worked and is corroded, so I managed to get it working by spending longer on scraping the corrosion off this time, and managed to fix that for the first time in 9 months! But in turn that messed up the indicator.. also corroded.. dammit! So cleaned up that and got those working.
The brake light was the other side so changed that over, sorted, slight signs of corrosion on the fog light and indicator though

Thought newer cars were meant to be better!
Headlight.. ok, no room to work, cant even see the bulb to know how it fits in.. look in the manual.. take it to the dealer?! Erm no.
Stupid little metal clip thing later and its out and new one back in..
I cannot believe it actually took an hour to change a few bulbs around.. took me about 5 mins on my mk3!