1. The Mercedes SLK

2. From concept to reality

3. Powertrain and performance

4. The 2000 facelift and performance upgrades

5. A clever roof for real roads

6. A legacy that evolved

The Mercedes SLK

When Mercedes-Benz introduced the SLK, it wasn’t just launching another small roadster — it was reviving a formula that had once made the 190SL the elegant younger sibling of the legendary 300SL. Just as the 190SL shared little with its big brother beyond the “Sport Leicht” name, the SLK echoed the spirit of the larger R129 SL, while bringing something fresh and thoroughly modern to the table. The “K” in its name stood for Kurz — German for “short” — highlighting its more compact proportions.

From concept to reality

The story of the SLK began at the Turin Motor Show in April 1994, where the first concept car made its debut. Built on a C-Class platform under the direction of Dieter Futschik, the SLK was shaped by the masterful hand of Bruno Sacco and his design team. Because it was only a concept at that stage, the car didn’t even have a roof — allowing for bold design choices unencumbered by production constraints.

A second concept followed at the Paris Salon later that same year, and this time it featured what would become its most famous party trick: the power-operated “Vario-Roof”, a folding steel hardtop that could open or close in just 25 seconds. Behind the seats, the signature roll-over hoops hinted at the car’s sporty character.

By the 1996 Turin Show, Mercedes unveiled the production version of the SLK. Remarkably, much of the concept’s charm had survived the transition to the showroom. Only the lighting units were slightly toned down. Thanks to advanced safety engineering, the cabin was surprisingly roomy for such a compact roadster.

Powertrain and performance

At launch, the SLK was available with two engine options:

• A 2.0-litre naturally aspirated four-cylinder producing 136 bhp

• A 2.3-litre supercharged (Kompressor) engine delivering 193 bhp

Certain markets, like Italy, received a supercharged 2.0-litre variant to work around tax regulations. Buyers could choose between a five-speed manual or five-speed automatic transmission.

The starting price in Germany was €27,000, making the SLK an accessible entry point into the Mercedes-Benz roadster world. In January 1997, the SLK 2.3 Kompressor reached the U.S. market. A sportier trim level, complete with AMG body styling and wheels, arrived by the 1999 model year.

The 2000 facelift and performance upgrades

For the 2000 model year, the SLK received a subtle facelift inspired by updates to the larger SL. Unveiled at the Detroit Auto Show, the refreshed model entered production in February. The lineup now featured:

• SLK200 Kompressor

• SLK230 Kompressor

• SLK320, powered by a smooth 218 bhp V6

Transmission choices included a six-speed manual and a five-speed automatic.

Then came the SLK32 AMG, revealed at the 2001 Detroit Show. This range-topping version packed a supercharged V6 with 354 bhp, capable of sprinting from 0–100 km/h in just 5.2 seconds. It featured an AMG-tuned SpeedShift automatic gearbox, aggressive body styling, and upgraded suspension components, turning the SLK into a genuine performance machine.

A clever roof for real roads

One of the SLK’s greatest strengths was its folding steel roof. European convertible enthusiasts often deal with unpredictable weather, and the SLK offered the perfect solution: the security and insulation of a coupe with the open-air joy of a roadster. This innovation would inspire many competitors in the years to follow.

A legacy that evolved

The original R170 SLK bowed out in 2004, replaced by the R171 series, which debuted at the Geneva Motor Show. Drawing design inspiration from the SLR supercar, the new SLK moved further upmarket, cementing its position as a stylish, compact luxury roadster with serious performance credentials.

But it’s the first-generation SLK that truly changed the game. It proved that a compact Mercedes roadster could be both fun and practical, combining German engineering with clever design. Even today, the R170 remains a beloved modern classic — a reminder that sometimes, less really is more.

Q: Which engine is the best choice in the R170 SLK?
A: For a balance of performance and everyday usability, the SLK230 Kompressor is one of the most appealing versions. Its supercharged four-cylinder produces 193 bhp, giving the lightweight R170 considerably more performance than the naturally aspirated SLK200. The later SLK320 offers a smoother 218-bhp V6, while the SLK32 AMG is the choice for outright performance.
Q: Is the Mercedes SLK230 Kompressor reliable?
A: The engine itself can be durable when properly maintained, but buyers should remember that these cars are now around two decades old. Age-related problems with cooling components, belts, electrical systems, suspension and the supercharger system can be more important than the engine’s original reliability. Service history and overall condition therefore matter more than mileage alone.
Q: What is special about the SLK32 AMG?
A: The SLK32 AMG is the performance flagship of the R170 range. Its supercharged V6 produces 354 bhp and allows 0–100 km/h in approximately 5.2 seconds. It also received AMG-tuned suspension, styling upgrades and a SpeedShift automatic transmission, making it substantially more serious than the standard SLK models.
Q: How does the Vario-Roof work?
A: The Vario-Roof is an electrically operated folding metal hardtop that transforms the SLK from a closed coupe into an open roadster. The roof folds into the rear of the car and can be operated in roughly 25 seconds. Its major advantage is that it provides much better weather protection, insulation and security than a conventional fabric convertible roof.
Q: What should you check when buying an R170 SLK?
A: The Vario-Roof should be one of the first things you test. Make sure it opens and closes smoothly and that there are no hydraulic leaks or unusual noises. Also inspect the body for corrosion, check the suspension and steering, examine the cooling system and verify that all electrical equipment works. On Kompressor models, the supercharger system should also be inspected carefully.
Q: Is the R170 SLK becoming a classic?
A: Yes, the R170 is increasingly regarded as a modern classic. Its distinctive 1990s Mercedes design, compact dimensions and innovative folding hardtop give it a strong identity. The most desirable examples are likely to be well-preserved, original cars and rare performance versions such as the SLK32 AMG.

Are you already a proud owner of a Mercedes R170? If so, check out our selection of parts for this car at the following link:

https://octoclassic.com/product-category/mercedes-benz/r170

Photo sources: ultimatespecs.com, autoevolution.com