I believe that the claim by sellers that their lights will not work in German cars applies to the newer cars that will detect faults with any electronic draw besides the intended bulb.
After going through a lot of different bulbs for my fog lights I came across these on eBay. IMHO, they look great. No heat issues.
I just bought a set of these; when they get here is a few weeks I will report back I am wanting to enable the Fog light DRL hack and once I get these I will do it.