A beautifully restored 1955 Mercedes-Benz 300 SL Gullwing Coupe is heading to the block at Broad Arrow Auctions' The Las Vegas Auction 2026, carrying a pre-sale estimate of $1,750,000 to $2,000,000. Finished in Graphite Grey over a striking red leather interior, this matching-numbers coupe pairs one of the most recognizable postwar silhouettes in the world with the kind of documented, no-expense-spared ownership history that serious 300 SL buyers look for.
This particular car carries chassis No. 198.040.5500726 and is a matching-numbers example, with its original chassis, engine, and body all still together — a detail that carries real weight in a market where "matching numbers" can mean a six-figure swing in value. The coupe was fully restored in its current Graphite Grey over Red livery by noted 300 SL specialist Rudi Koniczek, then upgraded with a five-speed manual transmission by Canepa in 2016, a popular modification that makes these cars noticeably friendlier to drive on longer tours. More recently, in 2024, the car benefited from roughly $75,000 in service work performed by Robert Webster of RW Fabrications. It rides on highly sought-after Rudge-style knock-off wheels and comes with a matching two-piece luggage set from Taris Charysyn and Co., and it remains eligible for some of the most exclusive events in the hobby, including the Mille Miglia and the Colorado Grand.
The 300 SL's road-going Gullwing coupe was directly derived from the tube-framed sports racer that won the 1952 Carrera Panamericana and the 24 Hours of Le Mans that same year. Those high side sills made conventional doors impractical, which is exactly why Mercedes-Benz engineers hung the doors from the roofline instead. Power came from a fuel-injected, 2,996cc straight-six good enough to push the coupe past 160 mph in its day, making it one of the fastest production cars in the world when it launched in 1954. Mercedes-Benz built roughly 1,400 Gullwing coupes through 1957, when the model gave way to the open 300 SL Roadster, and the coupe has endured ever since as one of the most collectible cars in the entire hobby.
Hagerty's Valuation Tools offer a useful gut check on where this sale fits into the broader market. As of this summer, Hagerty's Price Guide places a #3 (Good condition) 1955 300 SL Gullwing at roughly $1.35 million, with a range spanning about $1.22 million to $1.48 million, and values are down modestly, around 3.6 percent, compared to a year ago. Zooming out to the last 12 months of tracked auction results, Hagerty has logged more than 30 300 SL sales worth a combined $54 million, averaging about $1.6 million per car, even as the total number of cars changing hands has slipped. Given the depth of this example's restoration, its matching numbers, and its event eligibility, Broad Arrow's $1.75 million to $2 million estimate lands well above Hagerty's #3 benchmark, in territory closer to a #2 (Excellent) example.
The 300 SL's influence still runs through Mercedes-Benz's current lineup, and the SL nameplate keeps finding new collectors. Motorious recently looked at how a well-kept 2022 Mercedes-AMG SL55 is already building its own following among buyers looking for a more attainable entry point into that roadster heritage.
Rarity and documentation keep driving surprising results well beyond any single price guide, too. A one-off, gold-plated 1953 Cadillac concept recently resurfaced after more than seven decades out of public view, a reminder that unique history can push a car's value in directions no comp sheet can fully predict. Condition and paperwork matter just as much down the price ladder, from six and seven-figure European classics to muscle-era Americana like a numbers-matching 1959 Corvette convertible crossing the block at Mecum's Nashville sale, where Hagerty's price guide is again the reference point buyers and sellers lean on.
This 300 SL Gullwing is set to cross the block as part of Broad Arrow's The Las Vegas Auction 2026, where it joins a docket built around exactly this kind of blue-chip, well-documented collector car. For a coupe with this much history, condition, and paperwork behind it, the pre-sale estimate looks less like a stretch and more like a reflection of just how much the market still rewards doing it right.
⚡️ Read the full article on Motorious
Sign up for the Motorious Newsletter. For the latest news, follow us on Facebook, Twitter, and Instagram.