Some cars are impressive on their own. Others become even more special when brought together. At Ultrace Germany, the Mercedes-Benz Museum from Stuttgart presented five remarkable machines: the Sauber-Mercedes C9, Mercedes-Benz C11, Mercedes-Benz C292, Mercedes-Benz CLK GTR, and Mercedes-Benz C112. Five cars from different chapters of the brand’s history, each representing a different approach to performance, engineering,…