Volkswagen runs scheduled guided tours of the main plant, including the press shop, the body assembly hall, and the final line where Golfs, Tiguans, and Touareg ID.3s come together. The tour lasts about two hours and is conducted on foot and by electric bus through the gigantic halls.
You need to book in advance and bring photo ID; flat closed shoes are required. The tour is genuinely impressive — far more so than the Autostadt — and is the best way to understand what Wolfsburg actually is. Tours are run in German and English on most weekdays.