Changing the language on a Volkswagen RNS 300 unit (common in vehicles like the Golf, Passat, or Touran) is done through the system settings. Note that you may need your original navigation CD inserted, as the system often requires data from the disc to load different language files. Step-by-Step Language Change Guide Power On: Turn on your RNS 300 unit.
What I tested
To change the language on a Volkswagen RNS 300 unit, you generally need to navigate through the setup menu or use a navigation disc. Note that because this is an older CD-based system, some language changes (especially for voice directions) might require the corresponding navigation CD to be inserted. Standard Language Change Steps Access Setup: Press the Setup button on the unit. how+on+rns+300+change+language+new