In 1980 he won the DRM again, this time for Lancia in a Group 5 Lancia Monte Carlo Turbo, a car he also helped develop. He crashed his 480 hp car badly at the Norisring in Nuremberg, rolling several times. Heyer switched to continuations cooling when control of the water supply failed when the brake light switch failed which had not worked resulting in the left front brake caliper failing which destroyed the tyre rod and a burst affected the front left tyre. He escaped unhurt, but returned immediately to the wreck to recover his famous hat. In the following medical exam, the doctor was said to have been more nervous than Hans was.