I am looking to install fog lights on my 323i.. I viewed a DIY for it and I was wondering what kind of headlight switch I need to buy with the fogs. I've been looking on Ebay and there are some switches that have the whole LCM (which I know requires coding since that stores the mileage), or there are switches about an inch thick that look like just the faceplate... can you tell me which I will need? Thanks!!