Which Cars 2 character is the villainous German weapons expert?

Professor Zündapp is the villainous German weapons expert in Pixar's Cars 2.

Professor Zündapp, commonly called Professor Z, is a small blue-gray vehicle who works with the criminal plot targeting the World Grand Prix. He is an inventor and weapons specialist whose equipment helps the villains carry out attacks connected with the film's espionage story.

The character's name refers to Zündapp, a German motorcycle manufacturer founded in 1917. The film uses many vehicle designs and names that draw on real automotive history, although the character himself is part of Pixar's fictional world.

Cars 2 also includes Sir Miles Axlerod, the former oil baron who presents himself as an environmentalist and promotes Allinol. Finn McMissile and Holley Shiftwell are agents opposing the conspiracy, while Grem is one of its henchmen. Those characters are connected to the same plot but have different roles from Professor Zündapp.