If I wanted to replace the standard Lead battery by a Lithium battery, would I have to make any adjustments at the alternator / regulator?
After all, Lithium batteries need different voltage levels than Lead batteries.
Apparently the M3W is less picky than my BMW E90:
In our first winter it would warn me every other day that the battery was next to dead - but the car would start immediately nevertheless.
After several trips to the BMW dealer we found out that the previous owner had replaced the standard battery (lead-acid?) by a different type (lead-gel?), but forgot to adjust the settings in the control menu.
The battery worked fine for at least 5 more years.