Mercedes-Benz Concept Vehicles –
the Shape of the Future
A fresh vision for the roadster: SLK I and SLK II concepts
Ever since the 1950's, the letters "SL" have stood for a very special breed of Mercedes-Benz: sporty ("S"), light ("L") cars which were for the most part open-top roadsters. The SL series is now an established part of the range. By 1994 however, the time had come to air a new, compact version of the SL. The SLK concept made its debut in two stages.
The brand’s compact roadster: The SLK made its debut in 1994. The first version is an open-top car without a roof
In spring 1994 it appeared at the Turin Motor Show. Already in near-production form, it still lacked a roof however. That followed in the second SLK concept, which appeared a few months later at the Paris Motor Show. At the press of a button, the sensational electro-hydraulic "vario roof" transformed the SLK from a convertible into a winter-proof coupe – or vice versa – in just 25 seconds. Mercedes-Benz was the first manufacturer to revive this type of roof, which harked back to an earlier era. The SLK appeared as a production model in 1996 (R 170).
Vehicle 1:
SLK I concept
Spring 1994
Turin Motor Show
Vehicle 2:
SLK II concept
Fall 1994
Paris Motor Show
Sporty roadster with compact dimensions and innovative roof
Four-stroke four-cylinder gasoline engine, rear-wheel drive, five-speed manual transmission
Technical highlights
  • Vario roof
    Introduced 1996 in the Mercedes-Benz SLK (R 170)
  • Carbon fiber dashboard
The SLK Concept
The SLK concept took a variety of design cues from its imposing big brother, the SL, producing its own variation on the latter's themes of elegance and dynamism. The result was styling which looked to the future while at the same time being firmly rooted in the tradition of the Mercedes-Benz brand.
The face, the short overhangs front and rear and a pronounced wedge shape emphasized the affinity with the SL and gave an impression of agility. In other areas the SLK concept took a tangent however, for example in its compact exterior dimensions and various other highlights. These included the sheathed roll-over bars behind each of the two seats, which harked back to the successful 300 SLR sports car of 1955.
Mercedes-Benz SLK concept car from 1994
A pared-down look can be quite desirable in a roadster, as the interior of the SLK concept attested with an abundance of exposed, gleaming metal surfaces, only twenty percent of which sported any trim or cladding; in the later production SLK of course, it was a different story. A key design element was a dashboard of very lightweight carbon fiber material which gave the appearance of floating in mid-air. Two stowage nets underneath it continued the minimalist theme, although they were at the same time perfectly practical.
The instruments were aluminum-rimmed, as was the ignition lock, which was positioned in a horizontally swiveling hemisphere. Set in a second aluminum hemisphere in the center console was the short gearshift lever.
The second SLK concept
The second SLK concept exhibited a different interior. Appropriately in light of the venue – Paris – the keynote was elegance, with plentiful luxurious leather trim. As on the outside there was a preponderance of blue. This was a salute to the host country, since blue was the traditional color of French racing cars. For the most part, the bodywork of the second SLK concept differed from the first only in minor details, although it did sport exposed roll-over bars and the aforementioned vario roof, which folds down into the trunk at the touch of a button.
Clever protection: The second SLK concept car features the innovative vario roof
The sturdy windshield frame, sturdy roll-over protection and extremely rigid body structure offered the maximum in passive safety. Further safety features included full-size airbags in the carbon fiber steering wheel or, for the passenger, in the instrument panel, plus belt tensioners. Like all Mercedes-Benz cars, the SLK concept was also equipped with an anti-lock braking system (ABS).
The SLK concept was based on its own custom-designed platform. In classic sports car tradition, it used a five-speed manual transmission to transfer the power from the state-of-the-art four-cylinder four-valve engine to the rear axle. Sheltering behind the new-design five-spoke alloy wheels were vented disc brakes with fixed four-piston calipers.
The SLK concept was sporty, it was light in weight and it inspired the engineers, the marketing staff and above all the customers in equal measure. The production vehicle (R 170) appeared on the market in 1996. Since 2004 the success story of the R 170 is being continued by the new generation of the compact roadster SLK, the R 171.
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