I know very little about the South African racing scene, but a quick Google leads me to believe that Viana at least was a BMW factory driver in SA- turned up quite a few pics of his cars with 'Winfield' sponsorship and 'BMW Dealer Team' sunstrips
http://www.pabloclark.co.za/news/upl...s/1-719033.jpg
http://www.pabloclark.co.za/news/upl...s/6-709013.jpg
http://www.flickr.com/photos/peterel...en/3306557140/