Carlsson Mercedes-Benz SLK (2000) Review & Specs

Introduction

The Carlsson Mercedes-Benz SLK (2000) represents a distinctive interpretation of the first-generation R170 SLK roadster, modified by the German tuning specialist Carlsson Autotechnik. Founded in 1989 by brothers Rolf and Andreas Hartge in Merzig, Germany, Carlsson specialised exclusively in Mercedes-Benz vehicles and built a strong reputation in motorsport, including a class victory at the 1999 Nürburgring 24 Hours with a Carlsson-tuned SLK 200 Competition Roadster.

For the R170 SLK, Carlsson offered a range of tuning packages, most notably the CK20 engine performance kit based on the SLK 200 Kompressor. This package raises the 1.8-litre supercharged four-cylinder engine's output from 163 PS to 195 PS, and is complemented by chassis enhancements, aerodynamic components, and interior refinements. Buyers considering this vehicle should understand that Carlsson offered its components both as complete packages and as individual items, meaning individual examples may differ significantly in specification. Verifying the authenticity and completeness of the Carlsson conversion is therefore essential before purchase.

Exterior Design and Dimensions

The Carlsson CK20 is built on the R170 SLK, which Mercedes-Benz produced between 1995 and 2004 using a shortened variant of the W202 C-Class platform. The R170 was a two-door roadster with a retractable steel hardtop, a long bonnet, short overhangs, and a compact footprint. The standard R170 measures 3,995–4,010 mm in length, 1,715 mm in width, and 1,269–1,284 mm in height, with a wheelbase of 2,400 mm.

Carlsson's exterior modifications for the SLK 200 include a front spoiler with supplementary xenon fog lamps and large air ducts for brake cooling, aerodynamically optimised side mouldings with optional rear-brake ventilation ducts, and a rear apron with an integrated diffuser. A rear spoiler reduces lift at higher speeds. The vehicle rides on Carlsson one-piece Brilliant Edition alloy wheels in 8.5 x 18-inch dimensions at the front and 10 x 18-inch at the rear, fitted with Dunlop SP Sport Maxx tyres in 225/40 ZR18 and 255/35 ZR18 sizes respectively. The Carlsson sport suspension lowers the body by 30 mm, reducing the centre of gravity and improving handling characteristics.

Interior, Comfort, and Practicality

The interior of the Carlsson CK20 starts with the already well-appointed R170 SLK cabin and is enhanced by Carlsson with high-quality materials. The centrepiece is a luxurious bicolour leather interior in Walknappaleder (soft nappa leather), with the seat bolsters finished in graphite and the seat centre sections, headrest centre panels, and door centre panels in cognac. An ergonomically designed sports steering wheel is covered in top-quality leather, and two high-gloss polished stainless steel roll bars with the Carlsson logo are fitted behind the seats.

The R170 SLK is a two-seat roadster with a retractable hardtop that folds into the boot. The cabin offers good headroom and legroom for a roadster of its size. Practical limitations are typical of a compact roadster: luggage space is modest, particularly when the roof is stowed, and the low seating position can make entry and exit challenging for some occupants. Carlsson's interior modifications do not significantly alter the vehicle's practicality, though the leather appointments and stainless steel roll bars add a more luxurious and sporting character.

Technology, Ownership, and Maintenance

Ownership of a Carlsson-modified SLK requires attention to both the standard R170 maintenance schedule and the specific requirements of the Carlsson components. Routine servicing for the SLK 200 Kompressor includes oil and filter changes at recommended intervals, with spark plugs and air filters replaced at longer intervals. The 1.8-litre four-cylinder supercharged engine, designated M111, is the standard powerplant in the SLK 200 Kompressor.

Carlsson-specific components demand particular attention. The CK20 engine performance kit, which increases supercharger boost pressure by 0.1 bar, should be inspected for correct installation and function. The Carlsson sport suspension, comprising lowering springs and matching sport shock absorbers, lowers the ride height by 30 mm and should be checked for correct seating and damper condition. The stainless steel sport rear silencer with hard-chromed, flow-optimised tailpipes should be inspected for corrosion and secure mounting.

Parts availability for the base R170 SLK is generally good through Mercedes-Benz dealerships and independent specialists. Carlsson-specific parts, however, may be more difficult to source, particularly the aerodynamic components and Brilliant Edition alloy wheels. Prospective buyers should confirm that any required Carlsson parts are available or that suitable alternatives exist. Documented mechanical concerns for the R170 SLK include issues with the retractable hardtop mechanism and general electronic complexity typical of Mercedes-Benz vehicles of this era. These are general R170 considerations and not specific to the Carlsson conversion.

Carlsson Mercedes-Benz SLK (2000) Specifications and Performance

The Carlsson CK20 is based on the Mercedes-Benz SLK 200 Kompressor, which in 2000 was powered by a 1.8-litre supercharged four-cylinder engine producing 163 PS (120 kW) and 240 Nm of torque. Carlsson's CK20 engine performance kit increases the supercharger boost pressure by 0.1 bar, raising output to 195 PS (144 kW) at 5,500 rpm, with torque rising to 270 Nm at 3,500 rpm. These are Carlsson's verified figures for the CK20 conversion and should not be confused with the factory SLK 200 Kompressor specifications.

Carlsson quotes a 0–100 km/h acceleration time of 6.7 seconds for the CK20 with the six-speed manual transmission, a significant improvement over the standard SLK 200's 7.9 seconds. The top speed is quoted at 234 km/h, compared with 228 km/h for the standard model. The torque increase from 240 Nm to 270 Nm provides stronger in-gear acceleration, which is particularly noticeable at lower engine speeds. The performance increase is achieved through increased supercharger boost pressure and a revised air intake system, with no mechanical changes to the engine internals required.

Carlsson also offered higher-performance packages for the R170 SLK. The CK23 pulley kit for the SLK 230 Kompressor increases output to approximately 193–200 PS. The CM55 K package, based on the SLK 32 AMG, adds a supercharger system to the 3.2-litre V6, producing approximately 354 PS. A Carlsson-tuned SLK 200 Competition Roadster, powered by a naturally aspirated 2.0-litre engine developing approximately 240 PS, won its class at the 1999 Nürburgring 24 Hours. These packages are fundamentally different from the CK20 and should be distinguished when assessing any individual car.

Specifications Table

Specification	Carlsson CK20 (2000)
Make and model	Carlsson Mercedes-Benz SLK (CK20, based on SLK 200 Kompressor R170)
Model year	2000
Generation	R170 (first-generation SLK)
Body style	Two-door roadster with retractable hardtop
Engine	1.8-litre four-cylinder supercharged, M111
Maximum power (Carlsson CK20)	195 PS (144 kW) at 5,500 rpm
Maximum torque (Carlsson CK20)	270 Nm at 3,500 rpm
Standard SLK 200 power (for reference)	163 PS (120 kW)
Standard SLK 200 torque (for reference)	240 Nm
Transmission	Six-speed manual or five-speed automatic
Drivetrain	Rear-wheel drive
Acceleration 0–100 km/h	6.7 seconds (Carlsson figure, manual)
Maximum speed	234 km/h (Carlsson figure)
Length	3,995–4,010 mm
Width	1,715 mm
Height	1,269–1,284 mm
Wheelbase	2,400 mm
Kerb weight (SLK 200 reference)	Approximately 1,270–1,425 kg

City Driving and Highway Use

The Carlsson CK20 is a compact roadster with dimensions that make it well suited to urban environments. At approximately 4.0 metres in length, it is easy to manoeuvre and park in city conditions. The 30 mm suspension lowering reduces ground clearance, and drivers should exercise care with speed humps and steep driveways.

In city traffic, the torquey supercharged engine and the optional automatic transmission provide smooth, relaxed progress. The torque increase to 270 Nm gives the CK20 noticeably stronger low-speed response than the standard SLK 200, making overtaking and merging easier. Fuel consumption in urban conditions will be higher than the official combined figure. Official figures for the standard SLK 200 Kompressor quote approximately 9.5 l/100 km combined, with urban consumption around 14.1 l/100 km.

On the highway, the CK20 benefits from its sport suspension, which reduces body roll and improves stability at speed. The supercharged four-cylinder engine provides adequate acceleration for motorway merging and on-ramps, and the 234 km/h top speed indicates strong high-speed capability. The low-profile 18-inch tyres may transmit more road noise and impact harshness than the standard setup, particularly on coarse surfaces. The retractable hardtop provides coupe-like refinement when closed, making the CK20 a viable long-distance tourer.

Safety Equipment and Pre-Purchase Inspection

The R170 SLK was equipped with a comprehensive suite of safety features for the 2000 model year. Standard safety equipment includes dual front airbags with BabySmart auto passenger-side airbag deactivation, door-mounted side impact airbags, anti-lock brakes (ABS), Brake Assist, Automatic Slip Control (ASR) traction control, 3-point seat belts with emergency tensioning retractors and belt force limiters, dual integrated rollbars, and reinforced A-pillars. The R170 SLK was evaluated by Euro NCAP and received a four-star adult occupant protection rating, with the car proving very strong in frontal and side impact testing. Pedestrian protection was rated as poor. Carlsson modifications do not typically alter the factory safety systems, but any changes to suspension, wheels, or tyres should be assessed for their effect on vehicle dynamics and safety system calibration.

When inspecting a Carlsson CK20, the following checks are recommended:

• Service history: Confirm regular maintenance at correct intervals, with invoices from Mercedes-Benz specialists or Carlsson-approved workshops.
• CK20 engine kit: Verify that the supercharger boost increase and associated components are correctly installed. Check for any error messages or warning lights related to engine management.
• Engine condition: Check for oil leaks, coolant leaks, and signs of overheating. Listen for unusual noises from the supercharger and inspect for excessive oil consumption.
• Transmission: Test the manual or automatic transmission for smooth, hesitation-free operation across the full speed range.
• Suspension: Inspect the Carlsson sport springs and shock absorbers for correct seating and condition. Check for uneven ride height, which could indicate a broken spring or damaged damper. Note that some owners have reported a firm ride with Carlsson suspension components.
• Exhaust system: Inspect the Carlsson stainless steel sport rear silencer with hard-chromed tailpipes for corrosion, cracks, and secure mounting.
• Wheels and tyres: Examine Carlsson 18-inch alloy wheels for cracks, kerb damage, and correct tyre sizes. Confirm the tyres are matched and within legal tread depth.
• Retractable hardtop: Test the roof mechanism through several complete cycles, checking for smooth operation and correct latching.
• Body and paint: Check for accident damage and verify the authenticity of Carlsson body components. Look for uneven panel gaps or evidence of poor repair.
• Interior: Verify the condition of Carlsson-specific leather trim, steering wheel, and roll bars. Check all electronic functions, including climate control and seat adjustment.
• Documentation: Confirm that the Carlsson conversion is documented and that any applicable Mercedes-Benz recalls have been completed.

Trims, Versions, and Tuning Packages

Carlsson offered several tuning packages for the R170 SLK, and it is important to distinguish between them. The CK20, based on the SLK 200 Kompressor, is the entry-level performance package, with 195 PS and 270 Nm achieved through increased supercharger boost pressure. The CK23 pulley kit, based on the SLK 230 Kompressor, increases output to approximately 193–200 PS through a smaller supercharger pulley and revised engine management. The CM55 K, based on the SLK 32 AMG, adds a supercharger system to the 3.2-litre V6, producing approximately 354 PS.

It is important to note that individual cars may have been modified with a selection of Carlsson components rather than a complete package, and some may have had modifications applied after initial delivery. The Carlsson sport suspension, for example, can be fitted independently of the engine tuning. The aerodynamic package and alloy wheels are also available separately. Prospective buyers should request documentation of the specific Carlsson work performed and verify that the components fitted match the claimed package.

Advantages and Disadvantages

Advantages

• Significant performance increase over the standard SLK 200 Kompressor, with 195 PS and 270 Nm from the CK20 kit, delivering stronger acceleration and more responsive in-gear performance.
• Distinctive and exclusive appearance thanks to Carlsson body components, 18-inch Brilliant Edition alloy wheels, and interior trim details including bicolour nappa leather and polished stainless steel roll bars.
• Based on the R170 SLK, which offers a retractable hardtop, a four-star Euro NCAP safety rating, and the motorsport heritage of Carlsson's class victory at the 1999 Nürburgring 24 Hours.

Disadvantages

• Carlsson-specific parts, particularly the aerodynamic components and 18-inch alloy wheels, can be difficult to source and expensive to replace compared with standard Mercedes-Benz parts.
• The lowered suspension and low-profile tyres reduce ride comfort and increase the risk of wheel damage on poor road surfaces. Some owners have reported a particularly firm ride with Carlsson suspension components.
• The R170 SLK's retractable hardtop mechanism and electronic systems can be complex and costly to repair if faults develop.

Final Verdict

The Carlsson Mercedes-Benz SLK (2000) is a compelling proposition for buyers seeking a compact roadster with enhanced performance and a degree of exclusivity. The CK20 package transforms the already capable SLK 200 Kompressor into a more responsive and visually distinctive vehicle, with verified performance figures that place it well above the standard model. The combination of a supercharged four-cylinder engine, Carlsson chassis enhancements, and bespoke interior appointments makes it a genuinely special interpretation of the SLK formula.

However, prospective buyers should approach any Carlsson-modified SLK with caution. The modifications add complexity and potential maintenance burden, and the condition of the specific example is more important than the badge. A well-documented car with a complete service history and evidence of proper care is essential. Buyers should pay particular attention to the CK20 engine kit and verify that the Carlsson components are correctly installed and functioning. This is not a car for the faint-hearted, but for the right buyer, it offers a rare blend of open-top driving pleasure, performance, and individuality in a compact package.

Frequently Asked Questions

What engine does the Carlsson CK20 have?

The Carlsson CK20 is based on the Mercedes-Benz SLK 200 Kompressor and retains its 1.8-litre four-cylinder supercharged engine. Carlsson's CK20 engine performance kit increases output from 163 PS to 195 PS, with torque rising from 240 Nm to 270 Nm.

What should buyers inspect before purchasing a Carlsson SLK?

Buyers should verify the authenticity of the Carlsson conversion through documentation, check the condition of Carlsson-specific components such as the alloy wheels, exhaust, and suspension springs, and confirm that the base R170 SLK has a full service history. A thorough test of the retractable hardtop mechanism is also recommended.

What distinguishes the Carlsson CK20 from a standard SLK 200 Kompressor?

The CK20 features the engine performance kit producing 195 PS instead of 163 PS, Carlsson sport suspension lowering the body by 30 mm, 18-inch Brilliant Edition alloy wheels, a front spoiler with xenon fog lamps, side mouldings, a rear apron with diffuser, and interior appointments including bicolour nappa leather and polished stainless steel roll bars.