Generic OBD-II scanners can only tell you so much when it comes to European...

https://wiki-view.win/index.php/BMW_vs_Mercedes_Maintenance_in_Malaysia_%E2%80%93_Which_Is_Fussier%3F

Generic OBD-II scanners can only tell you so much when it comes to European cars in Malaysia. These vehicles use manufacturer-specific codes that need specialist tools to decode properly