Tonight I got the GPS, set the time, to work:
- Set the head unit to allow the option to be set.
- Set the body unit to allow the GPS to set the code.
For those interested in how to automatically set the car's clock via its GPS, the coding edits in my 2015 BEV were:
1. HU_NBT module > 3000 > SETTINGS_TIME_AUTOMATIC > set to navigation
2. BKOMBI module > 3000 > GPS_UHR > set to active
In some older U.S. i3s, the auto-clock setting is active from the factory, but it's inactive in others, requiring drivers to manually change the car's time in spring and autumn. Unlike the 2015, the auto-clock setting was active in my 2018 BEV.