The 1998 Mercedes-Benz SLK-Class (R170) introduced a groundbreaking compact luxury roadster to the market. Its distinctive two-door convertible body style featured the revolutionary "vario-roof," a fully automatic retractable hardtop that seamlessly transformed it from a sleek coupe to an open-air convertible in seconds. Launched in the US for the 1997 model year, the 1998 model was primarily available as the SLK230 Kompressor, priced around $40,000 new. This innovative roof mechanism made it incredibly popular, offering versatility and security unmatched by soft-top rivals.
The Good
The 1998 SLK230 Kompressor offers peppy supercharged performance and nimble handling, appealing to spirited drivers. Its iconic vario-roof provides both the joy of open-top motoring and the security of a coupe, a unique practical advantage. The design remains sleek and timeless, coupled with decent fuel efficiency for a luxury roadster. Mercedes-Benz build quality offers a sense of prestige and comfort, making it an attractive value on the used market.
The Bad
Known weaknesses for the 1998 SLK-Class include the complex vario-roof's hydraulic system, which can develop leaks and sensor issues, and potential rust, particularly on front fender edges and the subframe. Electrical gremlins, catalytic converter failures, and degrading interior plastic coatings are also common concerns for aging models.
1998 Mercedes-Benz SLK-Class: Quick Overview
- Engine Options: For the 1998 model year in the US, the primary and typically only engine offered was the M111 E23 ML, a 2.3-liter DOHC 16-valve inline-4 engine equipped with a supercharger (Kompressor). This engine was known for its robust construction and immediate power delivery.
- Horsepower: The 2.3L supercharged engine in the SLK230 Kompressor produced approximately 185 horsepower at 5300 rpm and 200 lb-ft of torque at 2500-4800 rpm, providing a lively performance for the lightweight roadster.
- Fuel Economy: Fuel economy figures for the 1998 SLK230 Kompressor with the standard 5-speed automatic transmission were generally around 20-22 MPG in the city and 28-30 MPG on the highway, respectable for a performance-oriented luxury car of its era. Manual transmission figures might vary slightly.
- 0-60 Times: The 1998 SLK230 Kompressor, when equipped with the automatic transmission, typically achieved 0-60 mph acceleration times in the range of 7.2 to 7.5 seconds. Manual transmission variants could be slightly quicker.
- Towing Capacity: The Mercedes-Benz SLK-Class, being a compact two-seater roadster, was not designed or rated for towing and therefore has no official towing capacity. It is not recommended to use this vehicle for towing purposes.
- Trim-Level Features (SLK230 Kompressor): As the sole trim for the US in 1998, the SLK230 Kompressor came well-appointed:
- Vario-Roof: The signature fully automatic retractable hardtop.
- Exterior: 16-inch alloy wheels, fog lights, heated power side mirrors.
- Interior: Leather upholstery, automatic climate control, power windows and door locks, cruise control, leather-wrapped steering wheel and shift knob.
- Audio: Mercedes-Benz "Audio 10" AM/FM stereo with cassette player. An optional CD changer was available.
- Safety & Driver-Assistance: Anti-lock Braking System (ABS), Acceleration Skid Control (ASR - traction control), dual front airbags, side airbags, and integrated rollover protection.
- Optional Features: Heated seats, upgraded sound system, and a trunk-mounted CD changer were popular options.
1998 Mercedes-Benz SLK-Class Specifications
Vehicle Information
| Year | 1998 |
| Make | Mercedes-Benz |
| Model | SLK-Class |
| Trim | - |
| Style | - |
| Type | Convertible |
| Category | Sports Car |
Manufacturing Details
| Made In | Germany |
| Manufacturing City | BREMEN |
Dimensions
| Doors | 2-Door |
| Curb Weight | 3036 pounds |
| Gross Vehicle Weight Rating | - |
| Overall Height | 50.70 inches |
| Overall Length | 157.30 inches |
| Overall Width | 67.50 inches |
| Wheelbase Length | 94.50 inches |
| Standard Seating | 2 |
Engine & Performance
| Engine | 2.3-L L-4 DOHC 16V |
| Engine Size | 2.3L |
| Engine Cylinders | 4 |
| Transmission | 5-Speed Automatic |
| Transmission Type | Automatic |
| Transmission Speeds | 5-Speed |
| Drivetrain | Rear-Wheel Drive |
Additional Features
| Anti-Brake System | 4-Wheel ABS |
| Steering Type | Recirculating |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | $39,700 |
| Invoice Price | $34,540 |
| Delivery Charges | - |
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What Problems Does the 1998 Mercedes-Benz SLK-Class Have?
The 1998 Mercedes-Benz SLK-Class, while offering Mercedes-Benz luxury and engineering, comes with a set of frequently reported problems and long-term reliability concerns typical of an aging, technologically advanced vehicle. The most prominent issue often revolves around the complex vario-roof system. Owners frequently report hydraulic leaks from the pump or cylinders, sensor failures that prevent roof operation, and relay issues. Repairing these can be costly due to specialized parts and labor.
Rust is another significant concern, particularly in regions with road salt. Common areas include the front fender edges, wheel arches, and increasingly, the rear subframe and suspension components. This is a crucial area to inspect during a pre-purchase assessment.
The supercharger clutch on the Kompressor engine can wear out, leading to reduced performance or eventual failure if not addressed. Catalytic converter failures are also common, resulting in "Check Engine" lights and requiring expensive replacements. Other engine-related issues include aging engine mounts and occasional vacuum leaks.
Electrical problems are widespread, ranging from faulty window regulators and dashboard pixel display failures to issues with the immobilizer system and key fobs. The interior also suffers from common plastic degradation, where the soft-touch coating on buttons and console elements becomes sticky or peels.
While specific recalls for the 1998 model might have addressed minor components like certain sensor wiring or seat belt issues (information would be available via NHTSA databases), no major, widespread safety recall fundamentally impacted the vehicle's core reliability. Long-term, while the engine and transmission can be robust if maintained, the complexity of the vario-roof, combined with aging electronics and rust susceptibility, means owners must budget for potentially significant repairs to keep the car in optimal condition.
Rust is another significant concern, particularly in regions with road salt. Common areas include the front fender edges, wheel arches, and increasingly, the rear subframe and suspension components. This is a crucial area to inspect during a pre-purchase assessment.
The supercharger clutch on the Kompressor engine can wear out, leading to reduced performance or eventual failure if not addressed. Catalytic converter failures are also common, resulting in "Check Engine" lights and requiring expensive replacements. Other engine-related issues include aging engine mounts and occasional vacuum leaks.
Electrical problems are widespread, ranging from faulty window regulators and dashboard pixel display failures to issues with the immobilizer system and key fobs. The interior also suffers from common plastic degradation, where the soft-touch coating on buttons and console elements becomes sticky or peels.
While specific recalls for the 1998 model might have addressed minor components like certain sensor wiring or seat belt issues (information would be available via NHTSA databases), no major, widespread safety recall fundamentally impacted the vehicle's core reliability. Long-term, while the engine and transmission can be robust if maintained, the complexity of the vario-roof, combined with aging electronics and rust susceptibility, means owners must budget for potentially significant repairs to keep the car in optimal condition.
How long will the 1998 Mercedes-Benz SLK-Class last?
With diligent maintenance, a 1998 Mercedes-Benz SLK-Class can easily achieve 150,000 to 200,000 miles or provide over 20 years of service. Its core engine and transmission are generally durable. However, long-term durability is heavily dependent on addressing its known weaknesses. Over time, the complex vario-roof hydraulic system becomes prone to leaks and sensor malfunctions, demanding expensive repairs. Rust, particularly on critical structural components like the subframe and body panels, can also severely impact its lifespan, especially in corrosive climates. Electrical gremlins and wear of interior components are also common. Consistent, preventative maintenance, focusing on these specific areas, is crucial to extending the SLK's service life and avoiding costly breakdowns.
What Technology & Safety Features are Included?
The 1998 Mercedes-Benz SLK-Class, particularly the SLK230 Kompressor, offered a commendable array of features for its time, blending luxury with a focus on convenience and safety. Its most iconic built-in technology was the "vario-roof," a fully automatic electro-hydraulic retractable hardtop that allowed the car to transform from a secure coupe to an open-air roadster with the push of a button. This was a significant technological marvel in its class.
Beyond the roof, standard built-in tech included automatic climate control, power windows, power door locks, power-adjustable heated side mirrors, and cruise control. The instrument cluster provided essential vehicle information, though digital displays could suffer from pixel degradation over time.
For entertainment, the car typically came with a Mercedes-Benz "Audio 10" head unit, which included an AM/FM stereo and a cassette player. An optional trunk-mounted CD changer was a popular upgrade, offering multi-disc playback, and some models could be optioned with a premium sound system.
Driver-assistance features, while not as extensive as modern vehicles, included fundamental systems crucial for safety. The 1998 SLK was equipped with a sophisticated Anti-lock Braking System (ABS) to prevent wheel lock-up during hard braking, and Acceleration Skid Control (ASR), which acted as a form of traction control to limit wheel spin during acceleration, especially important for a rear-wheel-drive sports car.
Safety features were robust for its era, including dual front airbags for the driver and passenger, as well as door-mounted side airbags for enhanced occupant protection. The SLK also incorporated seatbelt pretensioners to better secure occupants in a collision. Furthermore, its design integrated reinforced A-pillars and dedicated rollover protection hoops behind the seats, offering an additional layer of security in the unlikely event of a rollover.
Optional features beyond the CD changer included heated seats, which added comfort during colder convertible drives. Specific crash-test ratings from organizations like NHTSA or IIHS are challenging to find for a 1998 model in the same standardized format as contemporary vehicles. However, the SLK was engineered to meet stringent European safety standards of its time, providing a solid, secure platform for its occupants.
Beyond the roof, standard built-in tech included automatic climate control, power windows, power door locks, power-adjustable heated side mirrors, and cruise control. The instrument cluster provided essential vehicle information, though digital displays could suffer from pixel degradation over time.
For entertainment, the car typically came with a Mercedes-Benz "Audio 10" head unit, which included an AM/FM stereo and a cassette player. An optional trunk-mounted CD changer was a popular upgrade, offering multi-disc playback, and some models could be optioned with a premium sound system.
Driver-assistance features, while not as extensive as modern vehicles, included fundamental systems crucial for safety. The 1998 SLK was equipped with a sophisticated Anti-lock Braking System (ABS) to prevent wheel lock-up during hard braking, and Acceleration Skid Control (ASR), which acted as a form of traction control to limit wheel spin during acceleration, especially important for a rear-wheel-drive sports car.
Safety features were robust for its era, including dual front airbags for the driver and passenger, as well as door-mounted side airbags for enhanced occupant protection. The SLK also incorporated seatbelt pretensioners to better secure occupants in a collision. Furthermore, its design integrated reinforced A-pillars and dedicated rollover protection hoops behind the seats, offering an additional layer of security in the unlikely event of a rollover.
Optional features beyond the CD changer included heated seats, which added comfort during colder convertible drives. Specific crash-test ratings from organizations like NHTSA or IIHS are challenging to find for a 1998 model in the same standardized format as contemporary vehicles. However, the SLK was engineered to meet stringent European safety standards of its time, providing a solid, secure platform for its occupants.
What Colors Options are Available?
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In the meantime, feel free to explore the other sections for more content.
In the meantime, feel free to explore the other sections for more content.
1998 Mercedes-Benz SLK-Class Prices and Market Value
When new in 1998, the Mercedes-Benz SLK230 Kompressor had an MSRP typically in the range of $39,700 to $41,000. Today, as a used vehicle, its prices have depreciated significantly, often ranging from $5,000 to $15,000. Pristine, low-mileage examples with complete service records can command higher prices.
This vehicle has experienced substantial depreciation, making it an accessible classic. Factors heavily affecting current resale value include the overall condition of the vehicle (exterior, interior, rust absence), the functionality and health of the complex vario-roof system (a major repair can severely reduce value), comprehensive maintenance records, and mileage. Lack of rust, especially on critical areas, and a fully functional roof are paramount for retaining higher value in the used market.
This vehicle has experienced substantial depreciation, making it an accessible classic. Factors heavily affecting current resale value include the overall condition of the vehicle (exterior, interior, rust absence), the functionality and health of the complex vario-roof system (a major repair can severely reduce value), comprehensive maintenance records, and mileage. Lack of rust, especially on critical areas, and a fully functional roof are paramount for retaining higher value in the used market.
1998 Mercedes-Benz SLK-Class Cost of Ownership
Insurance costs for a 1998 SLK-Class are generally moderate, typical for an older two-seater luxury convertible. Fuel economy is decent, but it requires premium unleaded gasoline. Maintenance and repair costs are where ownership becomes less economical. Mercedes-Benz parts can be expensive, and specialized labor is often required, particularly for the complex vario-roof hydraulics, supercharger servicing, and addressing common electrical issues or rust. While the initial purchase price is low, the 1998 SLK-Class is not an economical vehicle to own long-term; owners must budget for higher-than-average running costs, especially for preventative maintenance and age-related repairs.
1998 Mercedes-Benz SLK-Class Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
14.00 gallons
City Mileage
22 miles/gallon
Highway Mileage
30 miles/gallon
1998 Mercedes-Benz SLK-Class Safety Rating
NHTSA
IIHS
1998 Mercedes-Benz SLK-Class Warranty
Basic
Original warranty
48 months / 50,000 miles
Estimated remaining
Expired
Powertrain
Original warranty
48 months / 50,000 miles
Estimated remaining
Expired
Rust
Original warranty
48 months / 50,000 miles
Estimated remaining
Expired
1998 Mercedes-Benz SLK-Class Insurance
Insurance for a 1998 Mercedes-Benz SLK-Class is moderately priced, reflecting its status as a Convertible with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 1998 Mercedes-Benz SLK-Class Compare to Other Convertible?
The 1998 Mercedes-Benz SLK-Class entered a burgeoning luxury roadster market, facing stiff competition. Its primary rivals included the BMW Z3 and the Porsche Boxster.
BMW Z3 (1998-2002):
Porsche Boxster (986, 1997-2004):
Recommendation:
For the pure enthusiast seeking the ultimate driving experience and handling prowess, the **Porsche Boxster** remains the top choice, provided one is prepared for potentially higher maintenance, including addressing the IMS bearing. For a more traditional, engaging roadster experience with a simpler, less problematic roof, the **BMW Z3** is an excellent alternative. The 1998 Mercedes-Benz SLK-Class stands out for its unique, innovative retractable hardtop, offering a blend of open-air freedom and coupe practicality that neither of its rivals could match in the same package. It's ideal for buyers prioritizing this unique feature and Mercedes-Benz luxury in a compact, stylish package, as long as they are aware of and prepared for the specific maintenance demands of the vario-roof and other age-related issues.
BMW Z3 (1998-2002):
- Performance: The Z3, particularly models like the 2.3 (later 2.5) with its naturally aspirated inline-six, offered a smoother, more refined engine note compared to the SLK's supercharged four-cylinder. The Z3's handling was often praised for its classic roadster feel.
- Features: It featured a traditional soft-top, simpler than the SLK's vario-roof but lacking its coupe-like security and refinement. Interior luxury was comparable.
- Reliability: Generally considered robust, but known for issues like cooling system component failures, rear subframe cracking (especially on M models), and suspension bushing wear. Its simpler roof mechanism meant fewer complex hydraulic issues.
- Price: New prices were competitive with the SLK. Used prices are now often similar, with good Z3 examples fetching a premium.
Porsche Boxster (986, 1997-2004):
- Performance: The Boxster, with its mid-engine layout and flat-six engine (2.5L initially, then 2.7L/3.2L "S"), offered superior handling, balance, and a more visceral driving experience. It was the benchmark for driving dynamics.
- Features: Featured a power-operated soft top with an optional hardtop. Interior quality was high, befitting Porsche's sports car lineage.
- Reliability: Infamously known for the Intermediate Shaft (IMS) bearing failure in early models (particularly pre-2000), which could lead to catastrophic engine damage. Other common issues included coolant leaks and Air/Oil Separator (AOS) failures.
- Price: Significantly more expensive when new. Used prices are generally higher than SLK or Z3, especially for the "S" models, but the IMS issue often depresses values for early cars.
Recommendation:
For the pure enthusiast seeking the ultimate driving experience and handling prowess, the **Porsche Boxster** remains the top choice, provided one is prepared for potentially higher maintenance, including addressing the IMS bearing. For a more traditional, engaging roadster experience with a simpler, less problematic roof, the **BMW Z3** is an excellent alternative. The 1998 Mercedes-Benz SLK-Class stands out for its unique, innovative retractable hardtop, offering a blend of open-air freedom and coupe practicality that neither of its rivals could match in the same package. It's ideal for buyers prioritizing this unique feature and Mercedes-Benz luxury in a compact, stylish package, as long as they are aware of and prepared for the specific maintenance demands of the vario-roof and other age-related issues.
Final Verdict: Is the 1998 Mercedes-Benz SLK-Class a Good Convertible?
The 1998 Mercedes-Benz SLK-Class (R170) is ideal for enthusiasts who appreciate its pioneering retractable hardtop, blending coupe security with convertible exhilaration, alongside Mercedes-Benz prestige. It's perfect as a stylish weekend cruiser or a fair-weather second car.
It is absolutely worth buying today, but exclusively as a **used vehicle** and under very specific conditions. A thorough **pre-purchase inspection (PPI)** by a Mercedes-Benz specialist is non-negotiable to assess the vario-roof's hydraulic health, identify any rust, and check for electrical or mechanical issues. Buyers must be prepared for **higher-than-average maintenance and repair costs**, especially for the aging roof system and potential rust remediation. The SLK230 Kompressor trim offers a good balance of performance and character.
This car is not suited as a primary, low-cost daily driver. It's a charming, affordable luxury convertible, provided the owner budgets for its specific long-term care.
It is absolutely worth buying today, but exclusively as a **used vehicle** and under very specific conditions. A thorough **pre-purchase inspection (PPI)** by a Mercedes-Benz specialist is non-negotiable to assess the vario-roof's hydraulic health, identify any rust, and check for electrical or mechanical issues. Buyers must be prepared for **higher-than-average maintenance and repair costs**, especially for the aging roof system and potential rust remediation. The SLK230 Kompressor trim offers a good balance of performance and character.
This car is not suited as a primary, low-cost daily driver. It's a charming, affordable luxury convertible, provided the owner budgets for its specific long-term care.
Simon A
Simon is a contributor to VinCheck, where he provides articles and reviews on various automotive topics. His work focuses on delivering accurate and up-to-date information about used cars, helping readers make informed decisions.