Theres a german EV-forum (
Übersicht 2021 LR / P Batteriekapazität Fahrzeugschein ) you might have seen with a excel dokument of different batteries. There was a lot of confusion because the German ministery of department( or whoever issues the paperwork for the cars) seem to randomly have used 77kwh and 82kwh and also 79 kwh numbers in the paperwork.
I was partly worried because I had a ’21 M3P on order as a direct result of the new version with heatpump and the longer range coupled to the 2170L cell. I did get SMT and found I had the bigger battery( 82.1kwh, most likely the 2170L battery).
In this forum some still use the battery label from the paperwork that is clearly wrong which I think ad up to the confusion.
Also, some seem to mix the reported values and refer the battery size as other values than ”Full pack when new” which should be used as the value for defining battery size by specification.
I think all M3 in the German forum that actually got scanned with SMT follow a very simple pattern:
LR has:
E3D = 77.8kwh ( = old Panasonic)
E5D = 74.5kwh ( = ”new” LG )
P has:
E3D = 82.1kwh (2170L)
I still have not seen a single case not following the above, when actually scanned by SMT.
The German paperwork mix/combine 77, 79 and 82 kwh with all above, but should be completely disregarded.