What are 3 German made cars?

Audi, BMW, Maybach, Mercedes, Opel, Porsche, Smart, and VW I can think of at the moment

Audi & VW are part of the same group - though you might not think so if you had to buy for an Audi a replacement part identical on both, and compared the prices if you bought it in a VW-labelled carton! Opel is part of General Motors, or certainly was for many years.