I'm currently doing the facelift conversion on my 2012 A4 and I ordered a pair of 2013 Headlights that are missing the ballasts and bulbs and I was wondering if I could just take the parts from my 2012 headlights and just use those or if I have to buy a new ballast and bulb? Also wondering does anyone know if I would have to do any coding for the new headlights to work?
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