Gustav Brunner
The team stepped up to a two-car operation again in 1980, with Marc Surer and Jan Lammers signed to drive the D3. Surer took 7th at the Brazilian Grand Prix, while Lammers started 4th before retiring at the United States Grand Prix West, but the team were still distinct midfielders, even after the introduction of the new Gustav Brunner-penned D4. From the US GP West, they were back down to a single car, with Surer injured, though he returned in the French Grand Prix, this time replacing Lammers. Once again, though, the team failed to score points.