Sao Paulo is 4 hours behind Berlin (winter) or 5 hours behind (summer). When it's 3:00 PM in Berlin, it's 10:00 AM or 11:00 AM in Sao Paulo. Brazil no longer observes DST.
Berlin uses CET/CEST while Sao Paulo uses BRT (Brasilia Time).
Optimal window: 1:00 PM - 6:00 PM Berlin time (8:00 AM - 1:00 PM Sao Paulo). Afternoon in Berlin reaches morning business hours in Brazil.
Germany is Brazil's largest trading partner in the EU, with strong automotive and machinery trade.