This 2G/3G/4G site is installed inside the Martin-Luther-Kirche at Tulpenstraße 1, Berlin-Lichterfelde. It features four antennas, but only three independent sectors. The north-east- and south-west-facing antennas are both emitting Sector 7.
The tower seen from the north-west:
And south-west:
The church with roof construction works going on seen from the south-east: