Table:
text: Mercedes-Benz W154
Non-championship results
Non-championship results
Year_ Event Venue Driver Result_ Category Report
1939 Eifelrennen Nürburgring Hermann Lang 1 Grand Prix Report
1939 Eifelrennen Nürburgring Rudolf Caracciola 3 Grand Prix Report
1939 Eifelrennen Nürburgring Manfred von Brauchitsch 4 Grand Prix Report
1939 Eifelrennen Nürburgring Hans Hartmann 8 Grand Prix Report
1939 Eifelrennen Nürburgring Richard Seaman Ret Grand Prix Report
1939 Belgrade City Race Kalemegdan Park Manfred von Brauchitsch 2 Grand Prix Report
1939 Belgrade City Race Kalemegdan Park Hermann Lang Ret Grand Prix Report
1947 Indianapolis 500 Indianapolis Duke Nalon Ret American National Championship Report
1948 Indianapolis 500 Indianapolis Chet Miller * Ken Fowler Louis Tomei Ret American National Championship Report
1949 Indianapolis 500 Indianapolis Joel Thorne DNQ American National Championship Report

Question: When did Hans Hartmann drive Mercedes-Benz W154?