Disconnecting the same battery and replacing the battery are two very different things. No one is reading anything into this, it is fact. There are 4 fields in VCDS that must be updated when replacing the battery, especially if it varies from the specs of the one you are replacing. At the very least the serial number field must be changed to let the car know it is a new battery.somethingcool wrote: ↑Sat Sep 19, 2020 2:41 pmUh, definitely YMMV. I've had the 12v disconnected for more than a few hours on multiple 2019 eGolfs without issue. Sometimes you get the Christmas lights on startup but a turning it off and on a few times and a drive around the block always returns everything to normal in my experience. Maybe it varies per year, but I think you are reading way too much into a few people that had issues, the car was not designed to need "coding" for a 12v battery swap, not sure what that even means? The car has no way to tell one 12v battery from another.
Because the eGolf does not have a BEM system requiring this coding change. It's specifically for vehicles with stop/start systems. It won't hurt anything, but it also doesn't do anything, waste of time and effort.
No, they are the exact same thing. This coding is for BEM equipped cars with start/stop feature. Does nothing in the egolf and is not even required in BEM equipped cars. You are misapplying information here without understanding the context.