300 SL (Gullwing and Roadster)

300 SL: The Racer That Grew Gullwing Doors

Fifty miles from the finish of the third Carrera Panamericana, on a fast right-hander taken at close to 200km/h, Karl Kling and his co-driver Hans Klenk hit a vulture. It came through the windscreen and struck Klenk directly, briefly knocking him unconscious and leaving both men covered in blood and broken glass; the crew later agreed the bird needed a wingspan of at least 115 centimetres and was heavy enough to be, in Klenk's own estimate, worth as much as five fattened geese. They did not stop. Kling held the car at speed for another 70 kilometres to the next scheduled tyre change, where the two men washed off, fitted rough protective bars ahead of the now-missing glass, and carried on to win the race outright. The car was a Mercedes-Benz 300 SL, but not the road car this entry is chiefly about. This was that car's direct ancestor, officially the W194: a pure racing sports car built on a welded tubular spaceframe chassis and campaigned by the factory across a single, deliberately compact 1952 season that also included Le Mans. It is worth keeping firmly separate from the W198 road car whose production figures appear later in this entry. The W194 built perhaps a dozen examples for factory racing use, never for sale, and none of its figures belong in a road-car production count.

That 1952 season was Mercedes-Benz's first postwar return to factory competition, and it went about as well as a comeback could. The 300 SL finished second at the Mille Miglia in May, swept the top three places at the Bern sports-car race, then won Le Mans outright in June, with Hermann Lang and Fritz Riess sharing the winning chassis. To this day that remains the only occasion a factory-entered Mercedes-Benz has won Le Mans outright. The Carrera Panamericana win in November, vulture and all, closed the season. None of it was accidental engineering improvisation: the car was designed chiefly by Rudolf Uhlenhaut, who had joined Daimler-Benz as a test engineer in 1931, been put in charge of the racing department at just 30, and by 1949 headed the company's passenger-car test department as well. With Mercedes-Benz having no formal motorsport programme in the early 1950s, Uhlenhaut effectively built one around this single car, on his own initiative, and by his own reputation as a driver good enough to run competitive laps against the professionals he employed.

The detail that made the W194 famous, though, was not a styling decision at all. Structural requirements forced Uhlenhaut to place unusually high sills on the tubular spaceframe chassis: the frame's principal load-bearing members ran right through where a conventional door would need to be cut, and cutting them would have compromised the very rigidity the spaceframe existed to provide. Rather than redesign the chassis, Uhlenhaut hinged the doors at the roof centreline instead of the side, so they swung upward and out of the way of the sills. It solved a packaging problem for a racing car nobody expected the public to ever sit in, and it stuck, wholesale, when Mercedes decided to build a road car around the same basic structure. The doors that later became the single most recognisable feature of any postwar sports car were, at their origin, an engineering compromise, not an idea anyone at Mercedes set out to style.

Turning that racer into a car anyone could buy took an outsider's push. At a Stuttgart directors' meeting in 1953, US importer Max Hoffman proposed a road-going version of the SL racer for the American market; when Mercedes' own management was initially unconvinced, Hoffman guaranteed an order for 1,000 cars himself, and new general director Fritz Konecke approved the production run on the strength of that commitment. The result broke with Mercedes' usual show calendar entirely: rather than debut at Frankfurt or Geneva, the road-going 300 SL (internally the W198) was unveiled at the International Motor Sports Show in New York, 6-14 February 1954, a deliberate acknowledgment of where the car's real market was. It kept the racer's spaceframe and gullwing doors, and added a genuine first for the company: a Bosch mechanical direct fuel-injection system feeding the 2,996cc M198 straight-six, tilted some 50 degrees to clear the low bonnet line the spaceframe dictated, for around 215 PS in standard road tune and a top speed reported as high as 260km/h. That was enough for Mercedes to market it as the fastest production car then available, a claim the press widely repeated. It was the first fuel-injected Mercedes-Benz production car, and the model most responsible for making gasoline direct injection commercially and culturally significant, but not, as popular shorthand sometimes claims, the first fuel-injected production car outright; that distinction belongs to the low-volume 1952 Goliath GP700 Sport, a two-cylinder two-stroke coupe that reached the market roughly five years earlier. Both claims are worth keeping straight rather than collapsing the 300 SL's real achievement into an inaccurate absolute.

Mercedes built the Gullwing coupe at Sindelfingen from August 1954 to May 1957, 1,400 cars in all, including 29 lightweight alloy-bodied examples (26 in 1955 and three in 1956), plus a single plastic-bodied test car. The coupe's high-pivot swing-axle rear suspension, inherited essentially unchanged from the W194 racer, could produce large camber changes under hard cornering, and period and modern accounts alike describe a Gullwing pushed near its limit as capable of sudden, difficult-to-catch oversteer. Mercedes addressed that reputation directly when the open Roadster replaced the coupe for 1957: a low-pivot, single-joint swing axle with a compensating coil spring, adapted from the contemporary 220a sedan, tamed the handling. Later cars picked up further updates through the end of the run, including four-wheel Dunlop disc brakes standardized from roughly March 1961, fitted to somewhere around 270 late-production cars, and an aluminum-alloy engine block introduced around March 1962 in place of the original cast iron. The Roadster carried on to February 1963, 1,858 cars built, for a combined Gullwing-and-Roadster total across the W198's nine-year run of 3,258 cars. Even the three-letter name on the trunk lid has a small twist to it: Mercedes explained "SL" as "Sport Leicht" (sport, light) for decades, including throughout the 300 SL's original production life, but revised that explanation in 2017 to "Super Leicht" after a finding in its own corporate archives. Both meanings are genuinely attributable to the company at different points in its history, which is why "Super Leicht" is best described as Mercedes' current preferred reading rather than the only one that was ever true.

The car's cultural footprint grew alongside its racing pedigree almost immediately. Stirling Moss and Denis Jenkinson used a 300 SL Gullwing coupe for pre-race reconnaissance ahead of their record-setting 1955 Mille Miglia win. They went on to achieve that win in a works 300 SLR racing car, not the road-going Gullwing itself, a distinction period retellings sometimes blur. Reported private owners from the same era include Sophia Loren, who received a 1955 example as a gift from Carlo Ponti, alongside Clark Gable, Juan Manuel Fangio, Pablo Picasso, and Paul Newman. That glamour has only compounded in the collector market since: a 1955 Gullwing once reportedly owned by Gable sold for $1.85 million at a Scottsdale auction in 2013, a 1955 Alloy Gullwing set a model record at $6.82 million hammer at RM Sotheby's Scottsdale in January 2022, and a 1956 Gullwing surpassed that record at $9.355 million at RM Sotheby's 2024 "Rudi Klein Junkyard" sale. Roadsters have climbed alongside the coupes: a 1960 car brought $1,270,000 at Monterey in August 2023 and a 1962 car $1,792,500 at Amelia Island the same year. Hagerty's tracked average values across the whole 300 SL population rose from around $1.14 million to around $1.51 million over the two years covered in its 2024 70th-anniversary market report, seventy years on from a Le Mans win, a vulture strike, and a doors-up shape nobody at Mercedes originally set out to style.