as far as i know my rear windshield is original and it has both symbols on the lower drivers side corner.
It's a renowned European glass manufacturer, now part of the Pilkington glass group I believe. http://www.flachglas-markenkreis.de/deu/data/index_start.php Don't know if they still make carglass though, but they used to be on every other car make alongside Sekurit http://www.saint-gobain-sekurit.com/anglais/default.asp I'm pretty sure MB used both as their supplier, but if its an original MB rear window it should have the star as well as the glass suppliers name.It was “SIGLA�. Does anyone know this brand?