The 2018 Mercedes-Benz SLC is a luxury compact roadster, serving as the refreshed successor to the iconic SLK-Class, which debuted in 1996. It features a distinctive two-seater convertible body style with a retractable hardtop. The SLC nameplate was introduced in 2017 and ran through 2020. Key trims include the SLC 300 and the performance-oriented AMG SLC 43. New pricing ranged from approximately $48,000 to over $60,000. Its appeal lies in its blend of classic Mercedes-Benz luxury, open-air driving pleasure, and everyday usability, particularly with its solid, insulated hardtop.
The Good
The 2018 Mercedes-Benz SLC offers refined performance, especially the potent AMG SLC 43. Its luxurious, well-appointed interior provides excellent comfort, enhanced by the AIRSCARF system for top-down driving. The sleek design with its retractable hardtop appeals emotionally, while reasonable fuel efficiency for its class and the Mercedes-Benz brand's prestige offer practical long-term value and reliability assurance.
The Bad
Known weaknesses for the 2018 Mercedes-Benz SLC include limited interior space for taller occupants and tight cargo capacity, especially with the roof down. Its infotainment system can feel dated compared to newer rivals. The ride, particularly on AMG models, can be firm, and ownership costs for maintenance and repairs are typically higher due to its luxury brand status.
2018 Mercedes-Benz SLC: Quick Overview
- Engine Options:
- SLC 300: 2.0-liter turbocharged inline-4 cylinder engine.
- AMG SLC 43: 3.0-liter biturbo V6 engine.
- Horsepower:
- SLC 300: 241 hp @ 5,500 rpm.
- AMG SLC 43: 362 hp @ 5,500-6,000 rpm.
- Torque:
- SLC 300: 273 lb-ft @ 1,300-4,000 rpm.
- AMG SLC 43: 384 lb-ft @ 2,000-4,200 rpm.
- Transmission:
- Standard 9G-TRONIC 9-speed automatic transmission for both trims.
- Fuel Economy (EPA Estimated):
- SLC 300: 23 MPG city / 32 MPG highway / 26 MPG combined.
- AMG SLC 43: 20 MPG city / 29 MPG highway / 23 MPG combined.
- 0-60 mph Acceleration:
- SLC 300: Approximately 5.8 seconds.
- AMG SLC 43: Approximately 4.6 seconds.
- Towing Capacity:
- Not rated or recommended for towing, as is typical for two-seater sports roadsters.
- Key Trim-Level Features:
- SLC 300 (Standard Features): 17-inch alloy wheels, LED daytime running lights, dual-zone automatic climate control, 7-inch central display, Bluetooth audio, USB input, MB-Tex upholstery, power-folding hardtop, power-adjustable seats, ATTENTION ASSIST.
- AMG SLC 43 (Adds/Upgrades over SLC 300): More powerful biturbo V6 engine, AMG-tuned sport suspension, AMG high-performance braking system, AMG body styling, 18-inch AMG alloy wheels, leather upholstery, red seat belts, AMG Sport exhaust system, Dynamic Select driving modes with "Sport+" mode.
- Optional Features (Available on both, more common on AMG SLC 43): COMAND navigation system with an 8-inch display, Harman Kardon Logic7® surround sound system, Nappa leather upholstery, AIRSCARF neck-level heating system, MAGIC SKY CONTROL electrochromic panoramic roof, Blind Spot Assist, Lane Keeping Assist, PARKTRONIC with Advanced Parking Assist, LED headlights, heated seats.
2018 Mercedes-Benz SLC Specifications
Vehicle Information
| Year | 2018 |
| Make | Mercedes-Benz |
| Model | SLC |
| Trim | - |
| Style | - |
| Type | Convertible |
| Category | Sports Car |
Manufacturing Details
| Made In | Germany |
| Manufacturing City | BREMEN |
Dimensions
| Doors | 2-Door |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | 130.3 cm |
| Overall Length | 413.51 cm |
| Overall Width | 181.61 cm |
| Wheelbase Length | 243.08 cm |
| Standard Seating | 2 |
Engine & Performance
| Engine | 2L I4 |
| Engine Size | 2L |
| Engine Cylinders | 4 |
| Transmission | 9-Speed Automatic |
| Transmission Type | Automatic |
| Transmission Speeds | 9-Speed |
| Drivetrain | Rear-Wheel Drive |
Additional Features
| Anti-Brake System | 4-Wheel ABS |
| Steering Type | Rack & Pinion |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | $48,400 USD |
| Invoice Price | $45,012 USD |
| Delivery Charges | $995 USD |
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What Problems Does the 2018 Mercedes-Benz SLC Have?
The 2018 Mercedes-Benz SLC, being part of the refreshed R172 generation (which started as the SLK in 2011), generally benefits from a mature platform. However, like many luxury vehicles, specific issues can arise. Commonly reported problems, though not necessarily widespread, can include electrical glitches. Owners have occasionally noted issues with the COMAND infotainment system, such as freezing or slow responses, which can be frustrating given the system's age relative to newer competitors. While the 9G-TRONIC transmission is generally robust, some anecdotal reports of occasional rough shifts or hesitations have surfaced, though often rectified with software updates.
The retractable hardtop mechanism, while a defining feature, is complex. Over time, components like seals, hydraulic lines, or sensors within the roof system can develop issues, potentially leading to leaks, slow operation, or complete failure. Regular maintenance and lubrication of the roof seals are crucial to prevent these problems. Suspension components, especially on the firmer AMG SLC 43, can wear out faster when driven aggressively or over poor roads, requiring replacements like bushings or shock absorbers. Minor interior rattles and squeaks can also develop over time, which is not uncommon in convertibles.
As of current data, there have been a few recalls impacting the 2018 Mercedes-Benz SLC. One notable recall involved the emergency call system software (Mercedes-Benz mbrace), which could transmit an incorrect vehicle location to emergency responders in the event of a crash. Another recall concerned certain vehicles where the electrical ground connection to the steering column module might not be correctly secured, potentially leading to a loss of the steering column control unit, including airbags, for short periods. It's always recommended to check the NHTSA website using the specific VIN for any open recalls before purchasing a used vehicle. Long-term reliability is generally good for Mercedes-Benz when meticulously maintained, but the cost of parts and specialized labor means repairs can be expensive.
The retractable hardtop mechanism, while a defining feature, is complex. Over time, components like seals, hydraulic lines, or sensors within the roof system can develop issues, potentially leading to leaks, slow operation, or complete failure. Regular maintenance and lubrication of the roof seals are crucial to prevent these problems. Suspension components, especially on the firmer AMG SLC 43, can wear out faster when driven aggressively or over poor roads, requiring replacements like bushings or shock absorbers. Minor interior rattles and squeaks can also develop over time, which is not uncommon in convertibles.
As of current data, there have been a few recalls impacting the 2018 Mercedes-Benz SLC. One notable recall involved the emergency call system software (Mercedes-Benz mbrace), which could transmit an incorrect vehicle location to emergency responders in the event of a crash. Another recall concerned certain vehicles where the electrical ground connection to the steering column module might not be correctly secured, potentially leading to a loss of the steering column control unit, including airbags, for short periods. It's always recommended to check the NHTSA website using the specific VIN for any open recalls before purchasing a used vehicle. Long-term reliability is generally good for Mercedes-Benz when meticulously maintained, but the cost of parts and specialized labor means repairs can be expensive.
How long will the 2018 Mercedes-Benz SLC last?
With proper and diligent maintenance, the 2018 Mercedes-Benz SLC can reliably serve its owners for a significant period. Mercedes-Benz engines are engineered for longevity, and it's reasonable to expect these vehicles to reach 150,000 to 200,000 miles or more, often providing 10-15 years of service. However, achieving this longevity hinges heavily on adherence to the manufacturer's recommended service schedule, using genuine parts, and addressing issues promptly.
Over time, common long-term durability concerns include the aforementioned retractable hardtop mechanism, which will eventually require servicing or parts replacement. Electrical components, while generally reliable, can develop intermittent faults as wiring and sensors age. Suspension components, especially bushings and control arms, will eventually wear, affecting ride quality. Regular fluid changes, including transmission fluid, are vital for component health. While the core mechanicals are robust, the complexity of luxury features means higher costs for upkeep as the vehicle ages.
Over time, common long-term durability concerns include the aforementioned retractable hardtop mechanism, which will eventually require servicing or parts replacement. Electrical components, while generally reliable, can develop intermittent faults as wiring and sensors age. Suspension components, especially bushings and control arms, will eventually wear, affecting ride quality. Regular fluid changes, including transmission fluid, are vital for component health. While the core mechanicals are robust, the complexity of luxury features means higher costs for upkeep as the vehicle ages.
What Technology & Safety Features are Included?
The 2018 Mercedes-Benz SLC offers a solid array of technology, entertainment, and safety features for its class, though some aspects show their age compared to newer luxury vehicles.
Built-in Tech & Entertainment: Standard features include a 7-inch central display screen controlled by a console-mounted knob, Bluetooth audio streaming and hands-free calling, two USB ports, HD Radio, and a CD player. The standard audio system is competent. Optional upgrades significantly enhance the experience, most notably the COMAND® navigation system, which typically includes an 8-inch screen, voice control, and real-time traffic updates. Audiophiles could opt for the premium Harman Kardon Logic7® surround-sound system, which delivered superior audio quality. The unique AIRSCARF neck-level heating system was a popular option, allowing comfortable top-down driving in cooler weather, and the MAGIC SKY CONTROL panoramic roof could instantly switch from clear to opaque at the touch of a button.
Driver-Assistance Features: Mercedes-Benz equipped the SLC with several advanced driver-assistance systems. Standard on all trims was ATTENTION ASSIST®, which monitors driver behavior for signs of drowsiness. Optional features included Blind Spot Assist, which warns drivers of vehicles in their blind spots, and Lane Keeping Assist, which alerts the driver if the car drifts out of its lane without signaling. PARKTRONIC with Advanced Parking Assist offered both front and rear parking sensors and could even steer the vehicle into parallel or perpendicular parking spaces automatically.
Safety Features: The 2018 SLC comes with a comprehensive suite of passive and active safety features. This includes eight airbags (dual front, knee, head-level side, and torso airbags), anti-lock brakes (ABS), electronic stability control (ESC), traction control, and an active pop-up roll bar system for enhanced occupant protection in the event of a rollover. A rearview camera was also standard, aiding in parking and reversing maneuvers. Mercedes-Benz's PRE-SAFE® system was optionally available, which could sense an impending collision and prepare the vehicle by tightening seatbelts and adjusting seats.
Crash-Test Ratings: Due to its status as a low-volume luxury roadster, the 2018 Mercedes-Benz SLC (and its SLK predecessor) was not subjected to crash testing by major independent organizations like the National Highway Traffic Safety Administration (NHTSA) or the Insurance Institute for Highway Safety (IIHS) in the United States. This is a common occurrence for specialty vehicles in this segment.
Built-in Tech & Entertainment: Standard features include a 7-inch central display screen controlled by a console-mounted knob, Bluetooth audio streaming and hands-free calling, two USB ports, HD Radio, and a CD player. The standard audio system is competent. Optional upgrades significantly enhance the experience, most notably the COMAND® navigation system, which typically includes an 8-inch screen, voice control, and real-time traffic updates. Audiophiles could opt for the premium Harman Kardon Logic7® surround-sound system, which delivered superior audio quality. The unique AIRSCARF neck-level heating system was a popular option, allowing comfortable top-down driving in cooler weather, and the MAGIC SKY CONTROL panoramic roof could instantly switch from clear to opaque at the touch of a button.
Driver-Assistance Features: Mercedes-Benz equipped the SLC with several advanced driver-assistance systems. Standard on all trims was ATTENTION ASSIST®, which monitors driver behavior for signs of drowsiness. Optional features included Blind Spot Assist, which warns drivers of vehicles in their blind spots, and Lane Keeping Assist, which alerts the driver if the car drifts out of its lane without signaling. PARKTRONIC with Advanced Parking Assist offered both front and rear parking sensors and could even steer the vehicle into parallel or perpendicular parking spaces automatically.
Safety Features: The 2018 SLC comes with a comprehensive suite of passive and active safety features. This includes eight airbags (dual front, knee, head-level side, and torso airbags), anti-lock brakes (ABS), electronic stability control (ESC), traction control, and an active pop-up roll bar system for enhanced occupant protection in the event of a rollover. A rearview camera was also standard, aiding in parking and reversing maneuvers. Mercedes-Benz's PRE-SAFE® system was optionally available, which could sense an impending collision and prepare the vehicle by tightening seatbelts and adjusting seats.
Crash-Test Ratings: Due to its status as a low-volume luxury roadster, the 2018 Mercedes-Benz SLC (and its SLK predecessor) was not subjected to crash testing by major independent organizations like the National Highway Traffic Safety Administration (NHTSA) or the Insurance Institute for Highway Safety (IIHS) in the United States. This is a common occurrence for specialty vehicles in this segment.
What Colors Options are Available?
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In the meantime, feel free to explore the other sections for more content.
2018 Mercedes-Benz SLC Prices and Market Value
When new, the 2018 Mercedes-Benz SLC 300 had an MSRP starting around $48,000, while the more powerful AMG SLC 43 began at approximately $61,500, with options quickly pushing prices higher. Today, in the used market, current prices for a 2018 SLC 300 typically range from $25,000 to $35,000, depending on mileage, condition, and options. The AMG SLC 43 commands a premium, generally selling for $35,000 to $45,000.
Luxury convertibles, including the SLC, tend to depreciate significantly from their new price, often losing 40-50% of their value within the first three to five years. This depreciation curve makes them attractive as used purchases. Factors affecting resale value include the vehicle's overall condition, comprehensive service history, mileage, desirable optional packages (like AIRSCARF or AMG Line appearance), and market demand. While initially steep, depreciation stabilizes over time, making a well-maintained used SLC a relatively good value proposition for luxury roadster enthusiasts.
Luxury convertibles, including the SLC, tend to depreciate significantly from their new price, often losing 40-50% of their value within the first three to five years. This depreciation curve makes them attractive as used purchases. Factors affecting resale value include the vehicle's overall condition, comprehensive service history, mileage, desirable optional packages (like AIRSCARF or AMG Line appearance), and market demand. While initially steep, depreciation stabilizes over time, making a well-maintained used SLC a relatively good value proposition for luxury roadster enthusiasts.
2018 Mercedes-Benz SLC Cost of Ownership
Owning a 2018 Mercedes-Benz SLC is generally a costly endeavor, reflecting its luxury segment. Insurance premiums are typically higher due to its performance, luxury status, and convertible body style. Fuel costs will be significant, as both the SLC 300 and AMG SLC 43 require premium unleaded gasoline. Maintenance costs are notably above average; routine services at Mercedes-Benz dealerships can be expensive, and parts are premium-priced. Unexpected repairs, especially for complex systems like the retractable hardtop or advanced electronics, can also be quite high. This vehicle is certainly not economical to own; prospective buyers should budget accordingly for its premium operational and upkeep expenses.
2018 Mercedes-Benz SLC Fuel Efficiency
Fuel Type
Gasoline
Fuel Capacity
60.19 liters
City Mileage
10.63 km/l
Highway Mileage
13.61 km/l
2018 Mercedes-Benz SLC Safety Rating
2018 Mercedes-Benz SLC 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
2018 Mercedes-Benz SLC Insurance
Insurance for a 2018 Mercedes-Benz SLC is moderately priced, reflecting its status as a Convertible with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2018 Mercedes-Benz SLC Compare to Other Convertible?
The 2018 Mercedes-Benz SLC competes in a niche but competitive segment, primarily against the BMW Z4, Audi TT Roadster, and the Porsche 718 Boxster. Each offers a distinct flavor.
Performance: The SLC 300 with its 241hp turbo-four offers decent zest for daily driving and relaxed cruising, comparable to the four-cylinder BMW Z4 sDrive30i or the base Audi TT Roadster. The AMG SLC 43, with its 362hp biturbo V6, is significantly more potent, matching the Z4 M40i (if a 2018 version were available, which it wasn't; the Z4 was redesigned for 2019) in spirit, but falls short of the razor-sharp handling and raw power of a Porsche 718 Boxster S or GTS, which are true sports car benchmarks. The Boxster offers a mid-engine layout, giving it superior balance and driving dynamics for enthusiasts.
Features: The SLC shines with its classic Mercedes luxury, offering a plush interior, comfortable seating, and the unique retractable hardtop for enhanced refinement and security compared to soft-top rivals. Features like AIRSCARF are distinctive. However, its COMAND infotainment system felt a bit dated compared to BMW's iDrive or Audi's Virtual Cockpit in the TT. The Z4 offered a more contemporary cabin design, while the Boxster prioritized driving ergonomics and performance-oriented features.
Reliability: All three German marques generally offer good reliability with proper maintenance. However, the complexity of the SLC's hardtop mechanism could be a long-term concern not present in soft-top rivals. BMW and Audi similarly have their own quirks, but none stand out as significantly more or less reliable overall. Porsche often has higher maintenance costs but is renowned for its engineering robustness.
Price: When new, the SLC was competitively priced, especially the SLC 300, undercutting the Boxster significantly. On the used market, the SLC has experienced steeper depreciation, making it a strong value proposition compared to a used Boxster, which tends to hold its value exceptionally well. Used Z4s and TT Roadsters typically fall in a similar price bracket to the SLC.
Alternatives:
The SLC is a strong choice for those prioritizing Mercedes-Benz luxury, a comfortable ride, and the security of a hardtop, rather than ultimate performance track prowess.
Performance: The SLC 300 with its 241hp turbo-four offers decent zest for daily driving and relaxed cruising, comparable to the four-cylinder BMW Z4 sDrive30i or the base Audi TT Roadster. The AMG SLC 43, with its 362hp biturbo V6, is significantly more potent, matching the Z4 M40i (if a 2018 version were available, which it wasn't; the Z4 was redesigned for 2019) in spirit, but falls short of the razor-sharp handling and raw power of a Porsche 718 Boxster S or GTS, which are true sports car benchmarks. The Boxster offers a mid-engine layout, giving it superior balance and driving dynamics for enthusiasts.
Features: The SLC shines with its classic Mercedes luxury, offering a plush interior, comfortable seating, and the unique retractable hardtop for enhanced refinement and security compared to soft-top rivals. Features like AIRSCARF are distinctive. However, its COMAND infotainment system felt a bit dated compared to BMW's iDrive or Audi's Virtual Cockpit in the TT. The Z4 offered a more contemporary cabin design, while the Boxster prioritized driving ergonomics and performance-oriented features.
Reliability: All three German marques generally offer good reliability with proper maintenance. However, the complexity of the SLC's hardtop mechanism could be a long-term concern not present in soft-top rivals. BMW and Audi similarly have their own quirks, but none stand out as significantly more or less reliable overall. Porsche often has higher maintenance costs but is renowned for its engineering robustness.
Price: When new, the SLC was competitively priced, especially the SLC 300, undercutting the Boxster significantly. On the used market, the SLC has experienced steeper depreciation, making it a strong value proposition compared to a used Boxster, which tends to hold its value exceptionally well. Used Z4s and TT Roadsters typically fall in a similar price bracket to the SLC.
Alternatives:
- For more engaging driving dynamics: The Porsche 718 Boxster is the undisputed king of driving pleasure in this class, offering superior handling, steering feel, and engine response.
- For a more modern interior and technology (especially post-2018 models): The BMW Z4, particularly the G29 generation (2019+), offers a more contemporary interior and updated tech.
- For distinctive design and AWD capability: The Audi TT Roadster, with its sleek design and available Quattro all-wheel drive, provides a different aesthetic and all-weather usability.
The SLC is a strong choice for those prioritizing Mercedes-Benz luxury, a comfortable ride, and the security of a hardtop, rather than ultimate performance track prowess.
Final Verdict: Is the 2018 Mercedes-Benz SLC a Good Convertible?
The 2018 Mercedes-Benz SLC is ideal for buyers seeking a luxurious, comfortable two-seater roadster with the security and refinement of a retractable hardtop. It appeals to those who prioritize brand prestige, a smooth ride (especially the SLC 300), and a stylish appearance over raw, track-focused performance. This vehicle suits daily cruising and weekend getaways rather than aggressive canyon carving.
It is absolutely worth buying, but almost exclusively as a used vehicle. Its significant depreciation makes it a fantastic value on the secondary market compared to its new price. For most buyers, the SLC 300 offers an excellent balance of performance, efficiency, and luxury. The AMG SLC 43 is for those desiring more power and a sportier edge, but be prepared for a firmer ride and higher running costs. Essential conditions for purchase include a thorough pre-purchase inspection by a Mercedes specialist, a complete service history, and a clear understanding of the higher long-term ownership costs associated with a luxury convertible.
It is absolutely worth buying, but almost exclusively as a used vehicle. Its significant depreciation makes it a fantastic value on the secondary market compared to its new price. For most buyers, the SLC 300 offers an excellent balance of performance, efficiency, and luxury. The AMG SLC 43 is for those desiring more power and a sportier edge, but be prepared for a firmer ride and higher running costs. Essential conditions for purchase include a thorough pre-purchase inspection by a Mercedes specialist, a complete service history, and a clear understanding of the higher long-term ownership costs associated with a luxury convertible.
Drew B
Drew is a seasoned automotive expert and contributor to VinCheck.info. With nearly 15 years of experience as a former Porsche technician, he brings a wealth of hands-on knowledge to his writing. Born in North Carolina, a region renowned for its deep-rooted NASCAR culture, Drew developed a passion for cars early in life, often building and working on vehicles from a young age. At VINCheck, Drew leverages his extensive technical background to provide in-depth analyses of various vehicles. His articles often focus on engine performance, reliability, and maintenance insights, offering readers practical information grounded in real-world experience. Some of his notable contributions include reviews on the Mazda CX-5's longevity and detailed examinations of engine options for models like the 2011 Toyota Camry and Tacoma