 Complete the following phrase:  The HS1 with which ATS had begun the season was a poor car and the teams regular drivers Jean-Pierre Jarier and Jochen Mass had struggled to even be close to competitiveness. The D1 was first used in practice for the Dutch Grand Prix and Keke Rosberg, who had stood in for Jarier earlier in the year, used it for the last two races of the season. He placed it 15th on the grid for the 