Mercedes production data for 2011 was not provided so I sourced what I could as best I could. Therefore gaps in 2012 do not represent nothing doing, but that I don't know for certain. Like BMW, production went up from 2.0% to 2.2%, coming in 13th and one behind the arch rival premium marque.
Mercedes has a broader spread of manufacturing facilities than its Bavarian competitor. That said 63% of all cars and light commercials are made in the homeland. China doesn't figure that highly compared to other premium marques.
Data source: OICA.