By Luc Olinga Premium-electric-vehicle maker Tesla should see its wish to further increase production volumes come true. Tesla (TSLA) – Get Tesla Inc Report and Chief Executive Elon Musk are officially very close to starting production of cars at their Berlin-based European factory. After several months of uncertainty, a key German regulator has approved the Austin EV manufacturer’s request, according to the German business newspaper Handelsblatt. Tesla has been waiting for several months for a permit from the German authorities to start manufacturing vehicles in this gigafactory, which will p…