Do not attempt an update if you already have V1.30 or higher. Downgrading is impossible without specialized tools.
The best resource for discovering these hidden features and community-made modifications remains owner forums like Minkara. With a little patience, your Eclipse AVN133MRC can be a trusty companion for years to come. eclipse avn133mrc english manual upd
You can use this as a reference or print it. For an official update, check the manufacturer’s website or contact their support. Do not attempt an update if you already have V1
: There is usually no built-in menu option to switch the entire system to English. eclipse avn133mrc english manual upd
Once your display is in English, locating the official manual is the next logical step.