“The Islamic Center Munich [IZM] invokes the Koran.” Of course it does.

“Men have authority over women because Allah has made the one superior to the other, and because they spend their wealth to maintain them. Good women are obedient. They guard their unseen parts because Allah has guarded them. As for those from whom you fear disobedience, admonish them and send them to beds apart and beat them.” — Qur’an 4:34

Muhammad “struck me on the chest which caused me pain, and then said: Did you think that Allah and His Apostle would deal unjustly with you?” — Aisha (Sahih Muslim 2127)

In light of those passages, the Islamic Center Munich might not be so open about its stance on this issue, but it is extremely unlikely to change it.

“German Islamic community recommends men hit ‘unruly’ women,” by Benjamin Weinthal, Jerusalem Post, August 4, 2019: