The 1999 Mercedes-Benz SLK-Class, part of the pioneering R170 generation (1996-2004), is a compact, two-door luxury roadster that introduced the innovative "Vario-roof" – a power-retractable hardtop. This feature allowed it to transform from a secure coupe to an open-air convertible at the touch of a button, making it immensely popular. For 1999, the primary trim was the SLK230 Kompressor, initially priced around $40,000. Its stylish design and blend of sportiness with Mercedes prestige truly made it stand out.
The Good
Emotionally, its distinctive design and the "wow" factor of the retractable hardtop deliver immense driving pleasure and status. Practically, the SLK230 Kompressor offers respectable fuel efficiency for a supercharged sports car, Mercedes-Benz build quality (though with caveats), and the year-round usability of its innovative roof. It combines accessible luxury with compact maneuverability.
The Bad
Key weaknesses include potential issues with the complex Vario-roof hydraulic system, electrical gremlins, and supercharger clutch failures. Rust can be a concern in some areas, along with degrading interior plastics and higher long-term maintenance costs typical of a luxury German vehicle.
1999 Mercedes-Benz SLK-Class: Quick Overview
- Engine Option (1999 SLK230 Kompressor): M111 2.3-liter DOHC 16-valve inline-4, supercharged with intercooler.
- Horsepower: Approximately 185-190 hp at 5300 rpm.
- Torque: Around 200 lb-ft at 2500-4800 rpm.
- Fuel Economy (EPA estimates):
- Manual: Approximately 20 MPG City / 28 MPG Highway
- Automatic: Approximately 19 MPG City / 26 MPG Highway
- 0-60 MPH Acceleration: Typically ranges from 7.0 to 7.5 seconds, depending on transmission and conditions.
- Towing Capacity: Not applicable; the vehicle is not designed or rated for towing.
- Transmission: Available with a 5-speed manual or a 5-speed automatic transmission.
- Trim-Level Features (SLK230 Kompressor Standard):
- Power-operated retractable hardtop (Vario-roof).
- Leather upholstery.
- Automatic climate control.
- Power windows, door locks, and heated side mirrors.
- Cruise control.
- Anti-lock Braking System (ABS).
- Electronic Stability Program (ESP) and Traction Control System (TCS).
- Dual front airbags and door-mounted side airbags.
- Power-adjustable seats.
- AM/FM stereo with CD player (or cassette, market-dependent).
- Integrated fog lights.
- 16-inch alloy wheels.
- Sport-tuned suspension.
- Optional Features:
- Heated seats.
- Bose premium sound system.
- Wind deflector.
1999 Mercedes-Benz SLK-Class Specifications
Vehicle Information
| Year | 1999 |
| Make | Mercedes-Benz |
| Model | SLK-Class |
| Trim | - |
| Style | - |
| Type | Cabriolet |
| Category | Compact Car |
Manufacturing Details
| Made In | Germany |
| Manufacturing City | SINDELFINGEN |
Dimensions
| Doors | 2-Door |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 2.3-L I4 |
| 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 | - |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | - |
| Invoice Price | - |
| Delivery Charges | - |
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What Problems Does the 1999 Mercedes-Benz SLK-Class Have?
The 1999 Mercedes-Benz SLK-Class, while generally robust in core mechanicals, does have several frequently reported problems. The most notorious is the Vario-roof system. Over time, the hydraulic cylinders that operate the roof tend to leak, leading to slow operation or complete failure. Repair involves replacing or rebuilding multiple cylinders, and the hydraulic pump motor can also fail. This is often the most expensive repair on these cars.
Electrical issues are also common with age, including window regulator failures, flickering or faded instrument cluster pixels, and occasionally issues with wiring harness degradation, though the latter is less prevalent than on earlier Mercedes models.
Under the hood, the supercharger clutch can fail, resulting in a rattling noise or loss of boost. Mass Air Flow (MAF) sensor failures are also common, causing rough idling or poor performance. Oil leaks from the valve cover gasket or rear main seal can develop.
Rust can be a significant concern, particularly on the lower edges of the wheel arches, trunk lid, and subframe components, especially in regions with harsh winters. Interior plastics can become sticky or brittle, and seat bolsters wear out. Suspension components like bushings and ball joints will require replacement over time.
Regarding recalls, while the 1999 model year had some, many relate to specific component batches like certain airbag inflators (e.g., Takata, though most are now replaced) or minor electrical components. Owners should check the NHTSA database using their VIN for any outstanding recalls. Overall, while the engine and transmission (especially manual) are durable, the complex convertible roof and aging electronics require careful attention and budget for long-term reliability.
Electrical issues are also common with age, including window regulator failures, flickering or faded instrument cluster pixels, and occasionally issues with wiring harness degradation, though the latter is less prevalent than on earlier Mercedes models.
Under the hood, the supercharger clutch can fail, resulting in a rattling noise or loss of boost. Mass Air Flow (MAF) sensor failures are also common, causing rough idling or poor performance. Oil leaks from the valve cover gasket or rear main seal can develop.
Rust can be a significant concern, particularly on the lower edges of the wheel arches, trunk lid, and subframe components, especially in regions with harsh winters. Interior plastics can become sticky or brittle, and seat bolsters wear out. Suspension components like bushings and ball joints will require replacement over time.
Regarding recalls, while the 1999 model year had some, many relate to specific component batches like certain airbag inflators (e.g., Takata, though most are now replaced) or minor electrical components. Owners should check the NHTSA database using their VIN for any outstanding recalls. Overall, while the engine and transmission (especially manual) are durable, the complex convertible roof and aging electronics require careful attention and budget for long-term reliability.
How long will the 1999 Mercedes-Benz SLK-Class last?
With diligent maintenance, a 1999 Mercedes-Benz SLK-Class can easily achieve 150,000 to 200,000 miles and serve for 20+ years. Many examples are still on the road today, often with lower mileage due to their typical use as weekend or pleasure vehicles. The core engine and transmission (particularly the manual) are known for good durability when serviced regularly. However, long-term weaknesses are predominantly related to age and complexity. The Vario-roof's hydraulic system is almost guaranteed to require attention. Electrical gremlins often emerge, and plastic/rubber components throughout the vehicle degrade. Rust can severely impact longevity, especially in corrosive climates. Proactive maintenance, addressing issues promptly, and keeping up with fluid changes are critical to maximizing its service life.
What Technology & Safety Features are Included?
The 1999 Mercedes-Benz SLK-Class (R170) featured a blend of luxury and forward-thinking technology for its era. Its most prominent built-in tech was the Vario-roof, a power-operated retractable hardtop that allowed seamless conversion from a secure coupe to an open-air convertible in about 25 seconds. Other standard conveniences included automatic climate control, power windows, central locking, and power-adjustable mirrors.
For entertainment, it typically came with a Mercedes-Benz branded AM/FM stereo system, often with a CD player or cassette deck, depending on the market and specific options. An optional Bose premium sound system was available for enhanced audio quality. However, advanced infotainment screens, navigation, or smartphone integration were not features of this generation.
In terms of driver-assistance and safety, the SLK was well-equipped for its time. Standard features included Anti-lock Braking System (ABS) for improved stopping control and a sophisticated Electronic Stability Program (ESP) with Traction Control System (TCS), which was advanced for a 1999 roadster, helping drivers maintain control in slippery conditions or during aggressive maneuvers. Safety features included dual front airbags and door-mounted side airbags, alongside seatbelt pretensioners. Crucially for an open-top car, integrated roll-over bars were strategically placed behind the seats to enhance occupant protection in the event of a rollover.
Specific crash-test ratings from agencies like NHTSA or IIHS in their modern, detailed format are generally not available for vehicles of this vintage. However, Mercedes-Benz had a strong reputation for safety engineering, and the inclusion of ESP and side airbags was a testament to their commitment to safety, placing the SLK ahead of many contemporaries in this regard.
For entertainment, it typically came with a Mercedes-Benz branded AM/FM stereo system, often with a CD player or cassette deck, depending on the market and specific options. An optional Bose premium sound system was available for enhanced audio quality. However, advanced infotainment screens, navigation, or smartphone integration were not features of this generation.
In terms of driver-assistance and safety, the SLK was well-equipped for its time. Standard features included Anti-lock Braking System (ABS) for improved stopping control and a sophisticated Electronic Stability Program (ESP) with Traction Control System (TCS), which was advanced for a 1999 roadster, helping drivers maintain control in slippery conditions or during aggressive maneuvers. Safety features included dual front airbags and door-mounted side airbags, alongside seatbelt pretensioners. Crucially for an open-top car, integrated roll-over bars were strategically placed behind the seats to enhance occupant protection in the event of a rollover.
Specific crash-test ratings from agencies like NHTSA or IIHS in their modern, detailed format are generally not available for vehicles of this vintage. However, Mercedes-Benz had a strong reputation for safety engineering, and the inclusion of ESP and side airbags was a testament to their commitment to safety, placing the SLK ahead of many contemporaries in this regard.
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.
1999 Mercedes-Benz SLK-Class Prices and Market Value
When new in 1999, the Mercedes-Benz SLK230 Kompressor typically retailed in the range of $39,700 to $41,000. Like most luxury vehicles, it experienced significant initial depreciation over its first decade.
Today, current used market prices vary widely. Poor condition or high-mileage examples might fetch $3,000-$6,000, while good, well-maintained cars average $7,000-$12,000. Pristine, low-mileage collector-grade examples can command $15,000 to over $25,000. Depreciation has largely bottomed out, and well-preserved R170 SLKs are now appreciating.
Factors heavily influencing resale value include: overall condition (especially paint, interior, and rust), a fully functional Vario-roof, complete maintenance records, and mileage (lower is better). A manual transmission can sometimes add a premium for enthusiasts. Its appeal as a modern classic is growing.
Today, current used market prices vary widely. Poor condition or high-mileage examples might fetch $3,000-$6,000, while good, well-maintained cars average $7,000-$12,000. Pristine, low-mileage collector-grade examples can command $15,000 to over $25,000. Depreciation has largely bottomed out, and well-preserved R170 SLKs are now appreciating.
Factors heavily influencing resale value include: overall condition (especially paint, interior, and rust), a fully functional Vario-roof, complete maintenance records, and mileage (lower is better). A manual transmission can sometimes add a premium for enthusiasts. Its appeal as a modern classic is growing.
1999 Mercedes-Benz SLK-Class Cost of Ownership
Owning a 1999 Mercedes-Benz SLK-Class is generally costly to own, not economical.
Insurance can be moderate for its age, potentially qualifying for classic car policies, but rates vary. Fuel requires premium unleaded, impacting running costs despite reasonable MPG for a sports car.
Maintenance at an independent Mercedes specialist can be reasonable for routine service, but parts are inherently more expensive than for mass-market vehicles. Repairs, particularly for the Vario-roof hydraulics, electrical issues, or supercharger components, can be significant. Labor costs for Mercedes-Benz expertise are high. Long-term ownership demands a dedicated budget for preventative maintenance and unexpected repairs, especially given the vehicle's age and complexity. Buyers should anticipate these costs beyond the low purchase price.
Insurance can be moderate for its age, potentially qualifying for classic car policies, but rates vary. Fuel requires premium unleaded, impacting running costs despite reasonable MPG for a sports car.
Maintenance at an independent Mercedes specialist can be reasonable for routine service, but parts are inherently more expensive than for mass-market vehicles. Repairs, particularly for the Vario-roof hydraulics, electrical issues, or supercharger components, can be significant. Labor costs for Mercedes-Benz expertise are high. Long-term ownership demands a dedicated budget for preventative maintenance and unexpected repairs, especially given the vehicle's age and complexity. Buyers should anticipate these costs beyond the low purchase price.
1999 Mercedes-Benz SLK-Class Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
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City Mileage
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Highway Mileage
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1999 Mercedes-Benz SLK-Class Insurance
Insurance for a 1999 Mercedes-Benz SLK-Class is moderately priced, reflecting its status as a Cabriolet with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 1999 Mercedes-Benz SLK-Class Compare to Other Cabriolet?
The 1999 Mercedes-Benz SLK-Class (R170) occupied a unique niche among its rivals.
Key Rivals:
Performance: The SLK230 Kompressor offered good straight-line acceleration and respectable handling for a boulevard cruiser, thanks to its supercharged engine. However, it wasn't as dynamically sharp or communicative as the mid-engined Porsche Boxster, which provided superior balance and a more engaging driving experience. The BMW Z3, especially in 2.8L or 3.0L guise, offered a more traditional, direct roadster feel with robust inline-six engines.
Features: The SLK's standout feature was its revolutionary Vario-roof, providing coupe-like security and quietness with convertible freedom – a significant advantage over the soft-top Z3 and Boxster. Inside, it offered typical Mercedes luxury for the era, though perhaps less sporty than the Boxster's cabin. The Audi TT (when it arrived) offered a more modern and design-forward interior.
Reliability: This is a mixed bag. The SLK's mechanicals are generally robust, but the complex Vario-roof and aging electrical systems can be sources of expensive repairs. BMW Z3s are known for robust engines but have cooling system weaknesses. Early Porsche Boxsters (986) famously suffered from IMS bearing issues, leading to potentially catastrophic engine failure. The Mazda Miata remains the benchmark for simplicity and long-term reliability.
Price (used): Today, used SLK prices are generally competitive with or slightly higher than equivalent Z3s, and often more accessible than Boxsters (especially considering Boxster's potential engine repair costs). The Miata is consistently the most budget-friendly option.
Recommendations:
Key Rivals:
- BMW Z3 (E36/7): A direct competitor, offering a more traditional soft-top roadster experience.
- Porsche Boxster (986): A more performance-focused, mid-engine alternative.
- Mazda MX-5 Miata (NB): A smaller, more affordable, and simpler roadster.
- Audi TT Roadster (8N): A newer contender, arriving later in the R170's lifecycle, with FWD/AWD options.
Performance: The SLK230 Kompressor offered good straight-line acceleration and respectable handling for a boulevard cruiser, thanks to its supercharged engine. However, it wasn't as dynamically sharp or communicative as the mid-engined Porsche Boxster, which provided superior balance and a more engaging driving experience. The BMW Z3, especially in 2.8L or 3.0L guise, offered a more traditional, direct roadster feel with robust inline-six engines.
Features: The SLK's standout feature was its revolutionary Vario-roof, providing coupe-like security and quietness with convertible freedom – a significant advantage over the soft-top Z3 and Boxster. Inside, it offered typical Mercedes luxury for the era, though perhaps less sporty than the Boxster's cabin. The Audi TT (when it arrived) offered a more modern and design-forward interior.
Reliability: This is a mixed bag. The SLK's mechanicals are generally robust, but the complex Vario-roof and aging electrical systems can be sources of expensive repairs. BMW Z3s are known for robust engines but have cooling system weaknesses. Early Porsche Boxsters (986) famously suffered from IMS bearing issues, leading to potentially catastrophic engine failure. The Mazda Miata remains the benchmark for simplicity and long-term reliability.
Price (used): Today, used SLK prices are generally competitive with or slightly higher than equivalent Z3s, and often more accessible than Boxsters (especially considering Boxster's potential engine repair costs). The Miata is consistently the most budget-friendly option.
Recommendations:
- For raw driving pleasure and handling: The Porsche Boxster (986) is superior, but budget for potential engine work.
- For a more traditional roadster feel with strong engines: The BMW Z3 2.8L or 3.0L is an excellent choice.
- For maximum reliability and lower ownership costs: The Mazda MX-5 Miata (NB) is unbeatable, though it lacks the luxury and power.
Final Verdict: Is the 1999 Mercedes-Benz SLK-Class a Good Cabriolet?
The 1999 Mercedes-Benz SLK-Class (R170) is ideal for enthusiasts seeking an affordable, stylish luxury convertible with the unique benefit of a retractable hardtop. It appeals to those who appreciate Mercedes design and aren't afraid of classic car ownership.
Is it worth buying? Yes, but with significant caveats. It's only worth buying used, and the absolute priority is finding an example with a complete service history and, most importantly, a fully functional Vario-roof. A pre-purchase inspection by a Mercedes specialist is non-negotiable. Buyers must budget generously for maintenance and potential repairs, as parts and labor can be expensive. It's best suited as a weekend cruiser or a second vehicle, rather than a primary daily driver, unless you have deep pockets. The SLK230 Kompressor offers a good balance of performance and economy for the 1999 model year. It's a charming car for the right, informed owner.
Is it worth buying? Yes, but with significant caveats. It's only worth buying used, and the absolute priority is finding an example with a complete service history and, most importantly, a fully functional Vario-roof. A pre-purchase inspection by a Mercedes specialist is non-negotiable. Buyers must budget generously for maintenance and potential repairs, as parts and labor can be expensive. It's best suited as a weekend cruiser or a second vehicle, rather than a primary daily driver, unless you have deep pockets. The SLK230 Kompressor offers a good balance of performance and economy for the 1999 model year. It's a charming car for the right, informed owner.
Eugene S
Eugene is an automotive enthusiast with over 15 years of experience in the used car market. As a writer at VINCheck.info, he brings deep industry insight and a passion for cars, helping readers make smart, informed decisions. Eugene has written hundreds of used car reviews and is known for breaking down complex automotive topics into clear, actionable advice. Over the years, he has driven and worked on a wide range of vehicles—starting with tuning street cars in his early days and eventually focusing on performance upgrades and reliability improvements. Today, he specializes in evaluating used vehicles through the lens of real-world ownership and enthusiast needs. A longtime fan of Porsche, Eugene especially appreciates vehicles that blend durability with driving enjoyment.