The workshop is located on a small industrial yard at Lahnstr. 75 (next to the Lidl supermarket), close to S&U Bhf Neukölln. Take exit Lahnstrasse if you arrive with U7. Entering the yard it’s the front building, back entrance to the right.
Opening hours (usually): Mo – Fr, 10.00 – 16.00.
Better make an appointment if you wanna drop by.