“It’s a high-tech production site. Around 900 top-quality BMWs leave this plant every day."
"The all-electric BMW i4, for example, already makes up a quarter of the production volume"
900 cars a day = 328,000 cars a year
i4 is currently 25% (a quarter of production) = 225 i4 a day = 82,125 i4 a year (this year 2022)
Production at Munich has maxed out at around 221,000 units per year in the recent past, and 328,000 would represent well over double the output for the last couple of years, so I wouldn't extrapolate the numbers like that. The i4 is the only full BEV produced at Munich, so if 50% of the cars are full BEV, and they get the production back up above 200k, that will give them the 100,000 units stated.