BMW, MB, VAG, Audi and many OEM European cars oil, air, fuel, cabin, transmission filters are made by Mann&Hummel and Mahle (to a lot extent) there is another company whose name i believe starts with letter "W", but I can recall the name...
to find a dealer near you, check the website below...
Mann makes a very good filter as does Mahle and mostly for European applications. I use a Mahle on my VW Cabriolet & Austin Mini because it's affordable and is an excellent filter. I use Wix on everything else with the exception of my Santa Fe I use an Amsoil EAO.