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Buick Y-Job
1938 Buick Y-Job
Often called the first concept car, Harley Earl's Y-Job was built to test ideas rather than to be sold. Its headlamps hid behind covers that opened like eyelids, the windows were electrically operated and the convertible top disappeared under a metal cover. Wraparound bumpers and flush door handles completed a look that ran ahead of every Buick in the showroom.
Its real legacy shows on the dashboard: the Y-Job's instruments set the tone for the Buicks that followed, and Earl used it as his own personal car. Hidden headlamps and power windows took decades to become common, which makes this the clearest starting point for the whole idea of a car that previews the future.
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Chrysler Thunderbolt (1941 concept car)
The retractable hardtop starts here. The Thunderbolt's one-piece metal roof retracted electrically into a space behind the seat at the flick of a switch, giving a closed coupe and an open roadster in one body, and its headlamps hid away when not in use.
Folding metal roofs took decades to become a common showroom option, but the trade-off they solve, the quiet and security of a coupe with the fresh air of a convertible, is exactly what this car demonstrated in 1941. Only five were built, so seeing the idea work at all on a prewar car is the point: the smooth, enveloping body looks like a styling exercise, while the roof is a genuine engineering preview.
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Pininfarina BMC 1800 Berlina Aerodinamica (1967 concept car)
This is the concept that drew the 1970s family car. Pininfarina built it on its own initiative on the humble Austin and Morris 1800, wrapping that roomy platform in a low-nosed, wedge-tailed fastback shaped for air flow rather than fashion.
BMC passed on it, and other companies took the hint. The Citroen GS and CX, the Rover SD1 and a string of two-box sedans from Italy and Germany share its profile closely enough that historians treat it as their common ancestor, although the designers of those cars deserve their own credit. The idea that made the jump is not a gadget but a whole silhouette: the aerodynamic hatchback sedan that still shapes everyday cars.
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Mercedes-Benz ESF 22 (1973 experimental safety vehicle)
The airbag in your steering wheel has a clear ancestor in this bulky S-Class. Mercedes built a series of Experimental Safety Vehicles in the early 1970s, and the ESF 22, shown at the international safety vehicle conference in Kyoto in 1973, carried a driver airbag alongside three-point belts with force limiters.
That combination is the one that reached customers: Mercedes previewed the driver airbag and belt tensioner for the 126-series S-Class in December 1980, and the first cars fitted with them left the line early in 1981. It looks like an ordinary sedan with big bumpers, which is the lesson: the most important part of this future was hidden inside.
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BMW Turbo
1972 BMW Turbo
Gullwing doors grab the eye, but look past them. The Turbo's center console was angled toward the driver so a belted driver could reach the controls, and BMW put that driver-oriented layout into production in the first 3 Series of 1975. Most BMW dashboards still lean toward the driver.
It also carried a radar distance warning that showed the gap to the car ahead and sounded an alert when it closed too quickly. That system never went on sale, and it only warned rather than kept a distance, but BMW's radar-based Active Cruise Control arrived on the 7 Series in the early 2000s. Its turbocharged engine reached showrooms far sooner, in the 2002 Turbo of 1973.
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Ford Probe III (1981 concept car)
Ford used this Frankfurt show car to get buyers used to a shape it was about to sell them. The Probe III appeared in September 1981, a year before the Sierra, with the same smooth, grille-light nose and rounded body that replaced the boxy Cortina, and its drag figure undercut that of the new 1984 Corvette.
The production Sierra was tamer but recognizably the same car, and the Probe's twin-deck rear spoiler turned up on the sporty version that Americans bought as the Merkur XR4Ti. The aero thinking also fed the 1986 Ford Taurus. Pick this one to see how a concept can work as a public rehearsal: it softened the shock of a radical design before the real thing reached dealers.
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Mercedes-Benz F100
1991 Mercedes-Benz F 100
Shown at the Detroit auto show in 1991, this minivan-shaped research car reads like the options list of a modern luxury sedan. It replaced the key with a chip card, and Mercedes' Keyless Go followed on the S-Class at the end of the decade. Its radar distance control ran ahead of the Distronic cruise control that the same S-Class later offered.
Xenon headlamps, a rain sensor, tire-pressure monitoring and voice control of the phone all appeared on it too, and all reached production Mercedes models within the decade. If you want one concept that shows how much of today's driver assistance was imagined before the web went mainstream, this is it.
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Mercedes-Benz F200
1996 Mercedes-Benz F 200 Imagination
The headline idea flopped, and the rest arrived almost at once. The F 200 had no steering wheel or pedals, only drive-by-wire sidesticks, and that never went on sale. What did go on sale is a useful checklist: the window airbag it introduced reached the E-Class in 1998, Active Body Control suspension made production in the CL coupe in 1999, and its voice control was Linguatronic, which Mercedes was putting into the S-Class at the same time.
Its electrically dimming glass roof later appeared on the Maybach 62. Choose this car for the contrast it offers: a show car can miss on its loudest promise and still be one of the most productive concepts of its decade.
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Volvo SCC
2001 Volvo Safety Concept Car
Volvo built the SCC around a simple question: what can the driver actually see? Cameras in the door mirrors watched the blind spot, and Volvo began fitting its camera-based Blind Spot Information System to production models at the end of 2004. Blind-spot warning is now common on new cars.
Not every idea made it. The see-through A-pillars, built from a metal frame filled with clear plastic, never went on sale. That mixed record is what makes it useful here: it shows which kind of idea survives contact with a factory.
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General Motors Hy-wire
2002 General Motors Hy-wire
Strip the body off almost any modern electric car and you find the Hy-wire's big idea: a flat skateboard holding the energy store and the motor, with the cabin sitting on top. GM's 2002 concept ran on hydrogen fuel cells and steered by wire, and because nothing mechanical had to pass through the floor, designers could shape the interior freely and even swap bodies on the same chassis.
The fuel cell did not become everyday, but the skateboard did, with batteries in its place. Tesla's skateboard cars were on sale for years before GM returned to the layout for its Ultium electric cars. Treat it as a shared idea rather than a direct blueprint: the Hy-wire is the clearest early demonstration of it.
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Chevrolet Volt
2007 Chevrolet Volt concept
When GM unveiled the Volt concept in Detroit in January 2007, the pitch was a car that drove on battery power and carried a small gasoline engine only to make more electricity on long trips. It was the first car designed around the company's E-Flex system, and GM said a fuel-cell version was in the works.
The sharp-edged show car did not survive, but the drivetrain idea did: the production Volt that reached customers in December 2010 used the same plug-in, range-extending approach. Plug-in hybrids are now an ordinary choice in showrooms. The styling changed completely, so this earns its place for the powertrain rather than the looks.
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Mercedes-Benz F 015 Luxury in Motion (2015 concept car)
The F 015 asked what a car is for once it drives itself, and answered with a living room. Unveiled at CES in Las Vegas in 2015, it had four lounge chairs that swiveled to face each other and six screens worked by eye tracking and gestures, plus LED panels that showed whether the car or a person was in charge.
This is the most speculative entry, and that is worth being clear about: no production Mercedes has the swivel lounge. The premise has started to arrive, though. In 2023 California approved Mercedes' Drive Pilot for sale on the S-Class and EQS, letting drivers hand control to the car on suitable freeways in daylight at up to 40 mph. The F 015 is the picture of where that road was pointing.
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Mercedes-Benz Vision EQXX
2022 Mercedes-Benz Vision EQXX
The newest entry, and the quickest to pay off. The Vision EQXX was built to show how far an electric car could go on a charge through efficiency alone, with a drive unit engineered to waste very little energy.
That work went straight into the electric CLA. Mercedes says the production car's drive unit is derived directly from the EQXX's, and it quotes up to 93 percent battery-to-wheel efficiency on long drives. The CLA looks nothing like the teardrop show car, so its place rests on the drivetrain. It is the best current example of a concept turning ordinary within a few years.
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