Now I have almost all the lights installed and all at once works (!! polarity must be respected, as with almost all LED lights !!!), beautiful white Blue Xenon light !! Works without problems in a 5 Series or golf in a VW Golf. 2009 and an Opel Vivaro bj. 2014 (you've built there) in the interior with Canbus there may be problems in the outdoor area as lamps, .. !! A small drawback have the bulbs, because the bent wire strands at the base are not down all 100 percent straight and bent and can thus when inserting a short supply this can be easily bent and directed, but for this price it is for me not Basic deducted a point) may only know about this Birndchen now have even ordered a second set because of my friends also who want to have installed)