Don't recall needing to do battery coding on my 2004 VW, but that was... 2004. Zero clue about what VW does today.
Got curious what this "coding" business is about. Sounds like one could change to the profile from flooded to AGM; not sure about the reverse. But it also puts in other info.
Link
Quote:
The electrical system in late-model BMWs is so sophisticated that it tailors charging as closely as possible to both the type and age of the battery. There's a computer that controls the alternator. When you replace a battery, this computer really needs to know if you've replaced the battery or updated the vehicle from a conventional Lead Acid battery to an Absorbent Glass Mat (AGM) type; it charges the AGM differently than a traditional battery.
Quote:
This Service Function informs the vehicle that the battery has been replaced. It completes the following operations:
- Battery capacity is set to 80
- Current Odometer reading are stored. The odometer readings at which the last seven battery replacements took place
can be read off from the Diagnosis Requests of Control Unit Functions
- Stored battery statistics (current, voltage, battery charge level) are deleted
- Stored temperature statistics are deleted