On your first one off the reversing lights looking at the eBay bulb wrong fitting. The
Ateca ones are push fitting. You get loads of light through the flash wolves and it's very white. Page 100 of the Nov 2016 manual.
Reverse light W16W... < so it's W16W fitting which is push.
The Flashwolves / Mtech ones I fitted taking the cue from the German
Ateca board on what worked:
http://www.seatcupra.net/forums/showthread.php?t=438101
Page 99 of the November 2016
Ateca manual covers the front fog lights.
The Erwin maintenance manual covers adjusting the range so you would have to be careful you didn't change that in removing the assembly. The German
Ateca board had details of people changing the bulbs but I don't think anyone in the UK has ventured that far. Will look for the link and post up.
Probably more searching on the come home function of Obdeleven is required.
Edit.
German thread for the reversing lights where Bernard et al came down in preference too the ones we call Flashwolves
https://www.ateca-forum.de/index.php/Thread/2311-LED-Rückfahrlicht/?pageNo=5
So I took my cue from them.
On front fog they have a thread. Bernard again H8 light
www.ateca-forum.de/index.php/Thread/1781-Nebelscheinwerfer-Leuchtmittel/?pageNo=5
He had canbus errors thou and fixed with a resister... I guess with the 2018 spec more people will want to mod their front fogs.
Will put on background tasks looking for going home as fogs...