| 13.2.1955 | Willow Springs [Modified +1.5] | 150 | 300 S | Crane / Talbot | T. W. Warner | DNA |
| 27.2.1955 | Preliminary Fort Pierce [BM+CM+DM+EM+CP+DP] | 4 | 300 SL | Duncan Black | | 16th |
| 27.2.1955 | SCCA National Fort Pierce [BM+CM+DM+EM+CP+DP] | 4 | 300 SL | Duncan Black | | raced |
| 13.3.1955 | 12 h Sebring | 30 | 300 SL | Scheffer / Lilley | Hector Scheffer | DNA |
| 13.3.1955 | 12 h Sebring | 31? | 300 SL | Woodnorth / Makins | Rees T. Makins & Herman Rutson | 21st |
| 13.3.1955 | 12 h Sebring | 32 | 300 SL | Flynn / Munoz | Chester J. Flynn | 35th |
| 13.3.1955 | 12 h Sebring | 33 | 300 SL | Pola / Croquer | Pancho P. Croquer | DNF |
| 13.3.1955 | 12 h Sebring | 34 | 300 SL | | Mercedes-Benz Distributors | DNA |
| 13.3.1955 | 12 h Sebring | | 300 SL | Black / Yates | Jack Pry Ltd. | DNA |
| 17.4.1955 | SCCA National Pebble Beach [CP+DP+EP] | | 300 SL | Terry Hall | | raced |
| 1.5.1955 | Mille Miglia | 010A | 180D | Masera / Cardinali | | 220th |
| 1.5.1955 | Mille Miglia | 011A | 180D | Butjens / Gosselin | | 240th |
| 1.5.1955 | Mille Miglia | 03 | 180D | Drexel / Loss | | DNF |
| 1.5.1955 | Mille Miglia | 04 | 180D | Retter / Larcher | | 201st |
| 1.5.1955 | Mille Miglia | 06 | 180D | Mondini / Bagaioli | | DNF |
| 1.5.1955 | Mille Miglia | 09 | 180D | Reinhardt / Wisnewski | | 214th |
| 1.5.1955 | Preliminary Bakersfield [Production] | 76 | 300 SL | Terry Hall | Terry Hall | 3rd |
| 1.5.1955 | SCCA National Bakersfield [S+1.5] | 76 | 300 SL | Terry Hall | Terry Hall | DNS |
| 1.5.1955 | Mille Miglia | 331 | 220 | Zedlitz / Diemer | | 131st |
| 1.5.1955 | Mille Miglia | 400 | 300 SL | V. Festi | | DNF |
| 1.5.1955 | Mille Miglia | 417 | 300 SL | Fitch / Gesell | Daimler Benz AG | 5th |
| 1.5.1955 | Mille Miglia | 428 | 300 SL | Gendebien / Washer | | 7th |
| 1.5.1955 | Mille Miglia | 443 | 300 SL | Heinrich Sauter | | DNA |
| 1.5.1955 | Mille Miglia | 445 | 300 SL | Salvatore Casella | | 10th |
| 1.5.1955 | Mille Miglia | 658 | 300 SLR | Juan Manuel Fangio | Daimler Benz AG | 2nd |
| 1.5.1955 | Mille Miglia | 701 | 300 SLR | Karl Kling | Daimler Benz AG | DNF |
| 1.5.1955 | Mille Miglia | 704 | 300 SLR | Herrmann / Eger | Daimler Benz AG | DNF |
| 1.5.1955 | Mille Miglia | 722 | 300 SLR | Moss / Jenkinson | Daimler Benz AG | 1st |
| 8.5.1955 | Eläintarhanajo [Production] | 8 | 300 SL | Olle Persson | | 6th |
| 8.5.1955 | GP Spa | 35 | 300 SL | Gilberte Thirion | | DNS |
| 15.5.1955 | GP Bari [S+2.0] | 8 | 300 SL | Salvatore Casella | | DNF |
| 15.5.1955 | Baden | 8 | 300 SL | Kurt Zeller | Kurt Zeller | DNF |
| 15.5.1955 | Baden [S+F3] | 8 | 300 SL | Kurt Zeller | | 1st |
| 15.5.1955 | SCCA National Cumberland [DP] | 59 | 300 SL | Art Simmons | A. R. Simmons | 4th |
| 15.5.1955 | Preliminary Cumberland [Novice 3.0] | 134 | 300 SL | Ed Hugus | R. Williamson | 3rd |
| 15.5.1955 | SCCA National Cumberland [DP] | 148 | 300 SL | Paul O'Shea | P. O'Shea | 1st |
| 22.5.1955 | Circuit de Dieppe | | 300 SL | Hans Tak | | raced |
| 29.5.1955 | Eifelrennen Nürburgring | 1 | 300 SLR | Juan Manuel Fangio | Daimler-Benz A.G. | 1st |
| 29.5.1955 | Eifelrennen Nürburgring | 2 | 300 SLR | Karl Kling | Daimler-Benz A.G. | 4th |
| 29.5.1955 | Eifelrennen Nürburgring | 3 | 300 SLR | Stirling Moss | Daimler-Benz A.G. | 2nd |
| 29.5.1955 | Supercortemaggiore | 6 | 300 SL | Casella / Gibbon | | DNF |
| 29.5.1955 | SCCA Regional Thompson [Match Race] | 58 | 300 SL | Art Simmons | | 5th |
| 29.5.1955 | SCCA Regional Thompson [DP] | 58 | 300 SL | Art Simmons | | 2nd |
| 29.5.1955 | National Zandvoort | 71 | 300 SL | | | raced |
| 29.5.1955 | SCCA Regional Thompson [DP] | 144 | 300 SL | Paul O'Shea | | 1st |
| 29.5.1955 | SCCA Regional Thompson [Match Race] | 144 | 300 SL | Paul O'Shea | | 1st |
| 30.5.1955 | Iowa [EM+FM+CP+DP+EP] | 76 | 300 SL | Terry Hall | Terry Hall | DNA |
| 30.5.1955 | Iowa [BM+CM+DM+EM+CP+DP+EP] | 76 | 300 SL | Terry Hall | Terry Hall | DNA |
| 30.5.1955 | Iowa [EM+FM+CP+DP+EP] | 93 | 300 SL | Bud Seaverns | George Seaverns III | DNA |
| 30.5.1955 | Iowa [Novice +1.5] | 93 | 300 SL | Jerry Godolphin | George Seaverns III | DNA |
| 30.5.1955 | Iowa [BM+CM+DM+EM+CP+DP+EP] | 93 | 300 SL | Bud Seaverns | George Seaverns III | DNA |
| 30.5.1955 | Iowa [EM+FM+CP+DP+EP] | 101 | 300 SL | Bill Victor | William Victor | 6th |
| 30.5.1955 | Iowa [BM+CM+DM+EM+CP+DP+EP] | 101 | 300 SL | Bill Victor | William Victor | DNA |
| 5.6.1955 | Santa Rosa [Production 3.0] | 76 | 300 SL | Terry Hall | | 1st |
| 5.6.1955 | Novice Santa Rosa [S+1.5] | 78 | 300 SL | Richard Mann | | 11th |
| 5.6.1955 | Santa Rosa [Production 3.0] | 157 | 300 SL | Jack Cardwell | | 2nd |
| 12.6.1955 | 24 h Le Mans | 19 | 300 SLR | Fangio / Moss | Daimler-Benz AG | DNF |
| 12.6.1955 | 24 h Le Mans | 20 | 300 SLR | Levegh / Fitch | Daimler-Benz AG | DNF |
| 12.6.1955 | 24 h Le Mans | 21 | 300 SLR | Kling / Simon | Daimler-Benz AG | DNF |
| 3.7.1955 | Milwaukee [CP+DP+EP] | 62 | 300 SL | Paul van Antwerpen | | DNA |
| 3.7.1955 | Milwaukee [BM+CM+DM+EM+CP+DP+EP] | 62 | 300 SL | Paul van Antwerpen | | DNA |
| 4.7.1955 | Preliminary Beverly [CP+DP+EP] | 22 | 300 SL | Art Simmons | | 2nd |
| 4.7.1955 | Preliminary Beverly [CP+DP+EP] | 39 | 300 SL | Paul O'Shea | | DNF |
| 10.7.1955 | Preliminary Torrey Pines [CP+DP+EP] | 14 | 300 SL | Paul O'Shea | Paul O'Shea | 1st |
| 10.7.1955 | SCCA National Torrey Pines [S+1.5] | 14 | 300 SL | Paul O'Shea | Paul O'Shea | 6th |
| 10.7.1955 | SCCA National Torrey Pines [S+1.5] | 77 | 300 SL | Richard Mann | Ensign Richard Mann | DNA |
| 10.7.1955 | Preliminary Torrey Pines [CP+DP+EP] | 77 | 300 SL | Richard Mann | Ensign Richard Mann | DNA |
| 10.7.1955 | Coppa d'Oro delle Dolomiti | 115 | 300 SL | Olivier Gendebien | | 1st |
| 10.7.1955 | Coppa d'Oro delle Dolomiti | 125 | 300 SL | Hans Tak | | 8th |
| 24.7.1955 | Monsanto [GT] | | 300 SL | Fernando de Mascarenhas | | 1st |
| 24.7.1955 | Monsanto [GT] | | 300 SL | Fernando Stock | | 2nd |
| 24.7.1955 | Monsanto [GT] | | 300 SL | Mário Rodrigues | | 3rd |
| 31.7.1955 | SCCA National Seafair [BM+CM+DM+EM] | 14 | 300 SL | Paul O'Shea | Paul O'Shea | 5th |
| 31.7.1955 | SCCA National Seafair [CP+DP+EP] | 14 | 300 SL | Paul O'Shea | Paul O'Shea | 1st |
| 31.7.1955 | SCCA National Seafair [CP+DP+EP] | 76 | 300 SL | Terry Hall | Terry Hall | 2nd |
| 31.7.1955 | SCCA National Seafair [BM+CM+DM+EM] | 76 | 300 SL | Terry Hall | Terry Hall | 7th |
| 7.8.1955 | GP Sverige | 1 | 300 SLR | Juan Manuel Fangio | Daimler-Benz | 1st |
| 7.8.1955 | GP Sverige | 2 | 300 SLR | Stirling Moss | Daimler-Benz | 2nd |
| 7.8.1955 | GP Sverige [Production/GT+2.0] | 33 | 300 SL | Karl Kling | Daimler-Benz | 1st |
| 7.8.1955 | GP Sverige [Production/GT+2.0] | 34 | 300 SL | Wolfgang von Trips | Daimler-Benz | DNF |
| 7.8.1955 | GP Sverige [Production/GT+2.0] | 35 | 300 SL | Erik Lundgren | Philipsons Automobil AB | 2nd |
| 7.8.1955 | GP Sverige [Production/GT+2.0] | 36 | 300 SL | Olle Persson | | 6th |
| 7.8.1955 | GP Sverige [Production/GT+2.0] | 37 | 300 SL | Bengt Martenson | Bengt Mårtenson | DNF |
| 7.8.1955 | GP Sverige [Production/GT+2.0] | 38 | 300 SL | Henri de Barry | Ecurie Azur | DNA |
| 7.8.1955 | GP Sverige | | 300 SLR Uhlenhaut Coupé | | Daimler-Benz | T-car |
| 13.8.1955 | Edenvale [S+3.0] | 46 | 300 SL | George Arents | | 3rd |
| 13.8.1955 | Edenvale [S3.0] | 46 | 300 SL | George Arents | | DNA |
| 13.8.1955 | 1 h Edenvale [Le Mans Handicap] | 46 | 300 SL | George Arents | | 3rd |
| 13.8.1955 | 1 h Edenvale [Le Mans Handicap] | 108 | 300 SL | Paul van Antwerpen | | 2nd |
| 13.8.1955 | Edenvale [S+3.0] | 108 | 300 SL | Paul van Antwerpen | | 1st |
| 13.8.1955 | Edenvale [S3.0] | 108 | 300 SL | Paul van Antwerpen | | 3rd |
| 14.8.1955 | Kanonloppet [Production/GT+2.0] | 16 | 300 SL | Olle Persson | | 4th |
| 14.8.1955 | Kanonloppet [Production/GT+2.0] | 17 | 300 SL | Bengt Martenson | | 7th |
| 14.8.1955 | Kanonloppet [Production/GT+2.0] | 24 | 300 SL | Wolfgang von Trips | | DNF |
| 14.8.1955 | Kanonloppet [Production/GT+2.0] | 25 | 300 SL | Erik Lundgren | | DNS |
| 21.8.1955 | Roskilde Ring [Formula Libre] | 21 | 300 SL | Bengt Martenson | | DNA |
| 21.8.1955 | Buchanan Field [Production 300SL+Jaguar+USA] | 76 | 300 SL | Terry Hall | Terry Hall | 5th |
| 21.8.1955 | Buchanan Field [Modified +1.5] | 76 | 300 SL | Terry Hall | Terry Hall | DNA |
| 21.8.1955 | Buchanan Field [Production 300SL+Jaguar+USA] | 78 | 300 SL | Richard Mann | Richard Mann | DNA |
| 21.8.1955 | Buchanan Field [Modified +1.5] | 78 | 300 SL | Richard Mann | Richard Mann | DNA |