The Mercedes-Benz SL-Class boasts a heritage stretching back decades, synonymous with luxurious open-top motoring. The 2018 model continues this tradition as a two-door roadster with a retractable hardtop. Key trims include the SL450, SL550, AMG SL63, and AMG SL65. New pricing ranged from approximately $90,000 to well over $200,000 for the top-tier AMG models. Its blend of performance, luxury, and the convenience of a hardtop convertible contributes to its enduring popularity.
The Good
The 2018 SL-Class offers potent performance and a luxurious, comfortable ride. The elegant design and retractable hardtop appeal to emotion, while the refined interior, advanced technology, and reasonable (for its class) reliability cater to more practical considerations. It delivers a prestigious ownership experience.
The Bad
The 2018 SL-Class can suffer from potentially costly repairs, particularly with the complex retractable hardtop and advanced electronics. Some owners have reported issues with the infotainment system and air suspension. While generally reliable, preventative maintenance is crucial to avoid expensive problems down the line. It also doesn't offer the most spacious interior.
2018 Mercedes-Benz SL-Class: Quick Overview
Here's a summary of the 2018 Mercedes-Benz SL-Class key specifications:
- Engine Options:
- SL450: 3.0L V6 Biturbo
- SL550: 4.7L V8 Biturbo
- AMG SL63: 5.5L V8 Biturbo
- AMG SL65: 6.0L V12 Biturbo
- Horsepower:
- SL450: 362 hp
- SL550: 449 hp
- AMG SL63: 577 hp
- AMG SL65: 621 hp
- Fuel Economy (EPA Estimated): (Note: Actual figures may vary)
- SL450: 20 mpg city / 28 mpg highway
- SL550: 17 mpg city / 25 mpg highway
- AMG SL63: 16 mpg city / 25 mpg highway
- AMG SL65: 13 mpg city / 22 mpg highway
- 0-60 Times:
- SL450: ~4.9 seconds
- SL550: ~4.3 seconds
- AMG SL63: ~4.0 seconds
- AMG SL65: ~3.9 seconds
- Towing Capacity: Not applicable (the SL-Class is not designed for towing)
- Trim-Level Features:
- SL450: Leather upholstery, COMAND infotainment system with navigation, Apple CarPlay/Android Auto, heated seats, Airscarf neck-level heating system, power-folding hardtop, LED headlights.
- SL550: Adds upgraded leather, multi-contour seats with massage function, keyless-go.
- AMG SL63: Adds AMG-tuned engine and suspension, performance brakes, unique styling elements, upgraded interior trim.
- AMG SL65: Adds even more powerful engine, carbon-fiber trim, ceramic brakes (optional).
2018 Mercedes-Benz SL-Class Specifications
Vehicle Information
| Year | 2018 |
| Make | Mercedes-Benz |
| Model | SL-Class |
| Trim | - |
| Style | - |
| Type | Sedan |
| Category | Sports Car |
Manufacturing Details
| Made In | Germany |
| Manufacturing City | BREMEN |
Dimensions
| Doors | 2-Door |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | 2 |
Engine & Performance
| Engine | M278 |
| Engine Size | 4.7L |
| Engine Cylinders | 8 |
| Transmission | 9-Speed Automatic |
| Transmission Type | Automatic |
| Transmission Speeds | 9-Speed |
| Drivetrain | Rear-Wheel Drive |
Additional Features
| Anti-Brake System | Standard |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | $112,300 USD |
| Invoice Price | $104,439 USD |
| Delivery Charges | $995 USD |
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What Problems Does the 2018 Mercedes-Benz SL-Class Have?
Frequently reported problems for the 2018 Mercedes-Benz SL-Class often revolve around its complex systems. Issues with the retractable hardtop mechanism are not uncommon, ranging from minor malfunctions to complete failure, which can be expensive to repair. The COMAND infotainment system, while feature-rich, can sometimes experience glitches or freezing issues. Air suspension problems, while not widespread, can also lead to costly repairs as the car ages.
Recalls for the 2018 SL-Class, like with any vehicle, can vary. It's best to consult the NHTSA (National Highway Traffic Safety Administration) website for the most up-to-date recall information specific to the 2018 model year. Common recall items often involve safety-related components, such as airbags or brake systems.
Long-term reliability concerns primarily stem from the aging of electronic components and the hydraulic systems associated with the convertible top and suspension. Regular maintenance and proactive addressing of any warning signs are essential to mitigate potential issues. Some model years within the SL-Class generation (R231) have been reported to have slightly higher instances of certain problems, so researching specific model year forums and owner reviews is advisable before purchasing a used SL.
Recalls for the 2018 SL-Class, like with any vehicle, can vary. It's best to consult the NHTSA (National Highway Traffic Safety Administration) website for the most up-to-date recall information specific to the 2018 model year. Common recall items often involve safety-related components, such as airbags or brake systems.
Long-term reliability concerns primarily stem from the aging of electronic components and the hydraulic systems associated with the convertible top and suspension. Regular maintenance and proactive addressing of any warning signs are essential to mitigate potential issues. Some model years within the SL-Class generation (R231) have been reported to have slightly higher instances of certain problems, so researching specific model year forums and owner reviews is advisable before purchasing a used SL.
How long will the 2018 Mercedes-Benz SL-Class last?
With proper maintenance, a 2018 Mercedes-Benz SL-Class can easily provide 150,000 miles or 10+ years of service. However, its long-term durability is heavily dependent on meticulous maintenance. Regular servicing of the engine, transmission, and, importantly, the hydraulic systems related to the roof and suspension is crucial. Weaknesses often emerge as the car ages, including potential corrosion in certain climates, wear and tear on interior components, and increased likelihood of electrical issues. Owners who adhere to recommended service intervals and promptly address any emerging problems can expect a longer and more trouble-free ownership experience.
What Technology & Safety Features are Included?
The 2018 Mercedes-Benz SL-Class comes well-equipped with technology. Standard features include the COMAND infotainment system with a central display, navigation, Bluetooth connectivity, and Apple CarPlay/Android Auto integration. The entertainment system features a premium audio system for a high-quality listening experience.
Driver-assistance features include standard features like a rearview camera, blind-spot monitoring, and lane-keeping assist. Options often included adaptive cruise control, parking sensors, and a surround-view camera system.
Safety features include multiple airbags, antilock brakes, and stability control.
Unfortunately, the NHTSA (National Highway Traffic Safety Administration) and IIHS (Insurance Institute for Highway Safety) do not typically perform crash tests on low-volume sports cars like the SL-Class. Consequently, official crash test ratings are generally unavailable. However, the SL-Class incorporates numerous active and passive safety systems designed to enhance occupant protection. The robust construction and advanced safety technologies contribute to its overall safety profile.
Driver-assistance features include standard features like a rearview camera, blind-spot monitoring, and lane-keeping assist. Options often included adaptive cruise control, parking sensors, and a surround-view camera system.
Safety features include multiple airbags, antilock brakes, and stability control.
Unfortunately, the NHTSA (National Highway Traffic Safety Administration) and IIHS (Insurance Institute for Highway Safety) do not typically perform crash tests on low-volume sports cars like the SL-Class. Consequently, official crash test ratings are generally unavailable. However, the SL-Class incorporates numerous active and passive safety systems designed to enhance occupant protection. The robust construction and advanced safety technologies contribute to its overall safety profile.
What Colors Options are Available?
Exterior Colors
Black
Polar White
Obsidian Black Metallic
Iridium Silver Metallic
Diamond White Metallic
Brilliant Blue Metallic
Lunar Blue Metallic
designo Cardinal Red Metallic
designo Selenite Grey Magno
designo Mocha Brown Metallic
designo Diamond White Bright
designo Cashmere White Magno
designo Mystic Blue
designo Graphite Metallic
Interior Colors
Black Nappa Leather
Gray Nappa Leather
Bengal Red/Black Nappa Leather
designo Classic Red/Black Nappa Leather
designo Porcelain/Black Nappa Leather
designo Saddle Brown/Black Nappa Leather
2018 Mercedes-Benz SL-Class Prices and Market Value
When new, the 2018 Mercedes-Benz SL-Class ranged from approximately $90,000 for the SL450 to over $200,000 for the AMG SL65. As of late 2023, used market prices for a 2018 SL-Class typically range from $45,000 to $80,000, depending on the trim level, mileage, and condition. Depreciation is significant, as is typical for luxury vehicles. Factors affecting resale value include the car's condition, maintenance history, mileage, color (desirable colors hold value better), and whether it's a sought-after AMG model. Lower mileage and a clean Carfax report will command higher prices.
2018 Mercedes-Benz SL-Class Cost of Ownership
The 2018 Mercedes-Benz SL-Class is a costly vehicle to own. Insurance premiums are high due to its value and performance. Fuel costs can be significant, especially with the V8 and V12 engines. Maintenance, including scheduled servicing and potential repairs, can be very expensive given the car's complexity and reliance on specialized parts. Long-term ownership requires a substantial financial commitment. Budgeting for potential repairs is essential to avoid unexpected financial burdens. It is not an economical car.
2018 Mercedes-Benz SL-Class Fuel Efficiency
Fuel Type
Gasoline (Required)
Fuel Capacity
44.74 liters
City Mileage
7.23 km/l
Highway Mileage
10.63 km/l
2018 Mercedes-Benz SL-Class Safety Rating
NHTSA
2018 Mercedes-Benz SL-Class Insurance
Insurance for a 2018 Mercedes-Benz SL-Class is moderately priced, reflecting its status as a Sedan with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 2018 Mercedes-Benz SL-Class Compare to Other Sedan?
The 2018 Mercedes-Benz SL-Class competes with roadsters like the Porsche 911 Cabriolet, BMW 6 Series Convertible (discontinued after 2018, but relevant in the used market), and Jaguar F-Type Convertible. The SL-Class offers a blend of luxury and performance, but the Porsche 911 often surpasses it in terms of handling and driver engagement. The BMW 6 Series provided similar luxury but with a slightly more sporty feel, while the Jaguar F-Type stands out for its distinctive styling and exhaust note.
In terms of reliability, the Porsche 911 generally holds a slight edge. The SL-Class offers comparable features but can be more expensive to maintain. Price-wise, the SL-Class is competitive within its segment.
Alternatives worth considering include: Porsche 911 Cabriolet (for superior handling and a more modern feel), BMW M850i Convertible (for similar luxury but a potentially newer model with updated tech, though more expensive), or a well-maintained, earlier generation Aston Martin Vantage Roadster for unique style and exclusivity (though significantly more expensive to maintain). If outright performance is the priority, the 911 is usually the better choice. For a balance of luxury and performance at a potentially lower price on the used market, the SL-Class remains a strong contender.
In terms of reliability, the Porsche 911 generally holds a slight edge. The SL-Class offers comparable features but can be more expensive to maintain. Price-wise, the SL-Class is competitive within its segment.
Alternatives worth considering include: Porsche 911 Cabriolet (for superior handling and a more modern feel), BMW M850i Convertible (for similar luxury but a potentially newer model with updated tech, though more expensive), or a well-maintained, earlier generation Aston Martin Vantage Roadster for unique style and exclusivity (though significantly more expensive to maintain). If outright performance is the priority, the 911 is usually the better choice. For a balance of luxury and performance at a potentially lower price on the used market, the SL-Class remains a strong contender.
Ranks #84 Convertible
| 1 | 2005 Toyota MR2 Spyder | (0.0★) |
| 2 | 2015 Lexus IS | (0.0★) |
| 3 | 2009 Honda S2000 | (4.0★) |
| 4 | 2023 Mazda MX-5 Miata RF | (4.0★) |
| 5 | 2023 BMW 8 Series | (0.0★) |
| 6 | 2021 Ford Mustang | (5.0★) |
| 7 | 2020 Mercedes-Benz SL-Class | (0.0★) |
| 8 | 2023 Audi S5 Sportback | (0.0★) |
| 9 | 2023 Ferrari F8 Spider | (0.0★) |
| 10 | 2023 Porsche 718 Boxster | (4.0★) |
| 11 | 2021 Jeep Compass | (5.0★) |
| 12 | 2019 Buick Cascada | (0.0★) |
| 84 | 2018 Mercedes-Benz SL-Class | (0.0★) |
Final Verdict: Is the 2018 Mercedes-Benz SL-Class a Good Sedan?
The 2018 Mercedes-Benz SL-Class is ideal for buyers seeking a luxurious and comfortable roadster with a retractable hardtop, offering both open-air enjoyment and year-round usability. It's worth buying, especially on the used market, if you prioritize comfort and a prestigious brand image. However, be prepared for potentially high maintenance costs. The SL450 or SL550 trims offer the best balance of performance and value. A pre-purchase inspection by a qualified mechanic is highly recommended to assess the condition of the roof mechanism, suspension, and electronics. Avoid the AMG SL65 unless you specifically desire its extreme performance and are prepared for significantly higher running costs.
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.