Can I take longer than the standard period to complete my university studies in Germany?

Yes, it's absolutely possible and quite common to take longer than the standard study period (Regelstudienzeit) to complete your university education in Germany. As long as you're making reasonable progress in your studies, extending your student residence permit usually isn't an issue. However, the Foreigners' Office (Ausländerbehörde) might ask for proof of progress, such as sufficient ECTS credits. If your studies extend, make sure to confirm the specific extension conditions with your local Ausländerbehörde.