Changing the language on a Volkswagen RNS 300 unit to a new language (e.g., English, French, Spanish) can be done directly through the system’s "SETUP" menu, although it may require the navigation CD to be inserted to update the system language, particularly if switching from German.
Frozen Screen: If the unit hangs during the "Loading Language" phase, do not turn off the ignition. Wait a few minutes for the data transfer to complete. how+on+rns+300+change+language+new
Select System: Use the rotary knob to scroll to System and press the knob to select it. Changing the language on a Volkswagen RNS 300
to scroll through the menu options until you find "Language" (or its equivalent in the current language, e.g., "Sprache" for German). Select & Confirm Changing language is moderately easy if you follow
If you need to change the language on the central screen between your gauges: Enter Menu
If you're looking for a specific language code, here are a few common ones: