Homes and offices were targeted in the pre-dawn swoops with mobile phones SIM cards and computers seized for analysis.
The raids even targeted six cells at the Moabit jail in the city.
The association Fussilet 33 was formed around the Fussilet Mosque which authorities shut down earlier this year because it was a magnet for Jihadists.
Amri, 24, worshipped there before he drove a hijacked lorry into a yuletide market on December 19 last year, killing 12 and injuring dozens more.
A police spokesman confirmed the seizure of the association’s communications devices but there were no immediate reports of arrests.