Osram doesn't make 6000 or 8000k bulbs. Period. The highest they make are 5400k, sorry. Bulbs must be the Korean knockoffs. eBay auctioneers commonly do this too. They always advertise that they carry brand name stuff, when in reality, it was a kit packaged in Korea or Taiwan, using the normal brand name ballasts (so as to look authentic), but the bulbs themselves are actually low quality Korean bulbs (since they can easily mimic the looks of the real brand bulbs fairly easily). The reliability of these has shown to be poor (I've heard of many failures since I've been studying the HID forums for many years). But the truth is Osram only makes 4100k (for OEM applications), and 5400k (made for the X1010 Aux. lowbeam Driving lights).
By the way, All Mercedes cars with factory xenon come with 4100k bulbs (not 6000k)
Also Osram doesn't make 'kits' for halogen to xenon retrofit either. Osram is an OEM or Aftermarket supplier that provides only LEGAL parts to the public. Other companies may use their components to build 'kits' to sell for retrofitting
