The Mercedes-Benz SL 280, produced from April 2008 to December 2011, was a variant of the R230 generation SL-Class roadster. Positioned as a mid-range offering within the facelifted R230 lineup (introduced in 2008), it provided a balance between performance and affordability compared to the higher-powered SL 350, SL 550, and SL 63 AMG models. The SL 280 featured a naturally aspirated 3.0-liter V6 engine paired exclusively with Mercedes-Benz’s 7G-TRONIC seven-speed automatic transmission. This combination aimed to deliver a comfortable grand touring experience with reasonable fuel economy for a vehicle of its class.
Powertrain & Engine Architecture
The heart of the SL 280 is the M 272.949 engine, a 2,996 cc (182.83 cu. in.) naturally aspirated V6. This engine utilizes a 60-degree V-angle configuration and is constructed primarily from aluminum alloy. It features multi-port fuel injection, delivering fuel directly into the intake ports, and a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. The compression ratio is 11.3:1. The engine produces 231 horsepower (hp) at 6000 rpm and 300 Newton-meters (221.27 lb-ft) of torque between 2500 and 5000 rpm. Power per liter is rated at 77.1 hp/l.
The 7G-TRONIC automatic transmission, a seven-speed unit, was a key component of the SL 280’s drivetrain. This transmission offered smooth and responsive shifting, contributing to the vehicle’s refined driving experience. It featured a torque converter and electronically controlled gear changes. The transmission was designed to optimize fuel efficiency and provide a wide range of gear ratios to suit various driving conditions. The transmission’s gear ratios were tuned to balance acceleration with cruising comfort, prioritizing smooth operation over outright performance.
Engine Code Specifics
The M 272 engine family, including the 272.949 variant in the SL 280, was known for its relatively robust design and reliability. However, early versions of the M272 engines (prior to 2009) were susceptible to balance shaft sprocket wear, potentially leading to engine noise. Mercedes-Benz addressed this issue with revised components in later production years, including those used in the 2008-2011 SL 280. Regular oil changes with the correct specification oil are crucial for maintaining the longevity of this engine.
Driving Characteristics
The SL 280, with its 231 hp and 7G-TRONIC transmission, offered a comfortable and refined driving experience. Acceleration from 0 to 100 km/h (0-62 mph) took approximately 7.8 seconds, while 0-60 mph was achieved in around 7.4 seconds. Top speed was electronically limited to 250 km/h (155.34 mph). Compared to the more powerful SL 350, the SL 280 felt less urgent in acceleration, particularly at higher speeds. However, the V6 engine provided ample power for everyday driving and comfortable highway cruising.
The 7G-TRONIC transmission contributed to a smooth and seamless driving experience. Gear changes were generally imperceptible, and the transmission readily adapted to different driving styles. While not as sporty as some dual-clutch transmissions, the 7G-TRONIC prioritized comfort and refinement. The relatively lower power output of the SL 280 meant that the transmission rarely hunted for gears, providing a relaxed and predictable driving experience.
Equipment & Trim Levels
The SL 280 came standard with a comprehensive list of features befitting a luxury roadster. Standard equipment included leather upholstery, automatic climate control, power-adjustable seats, a premium sound system, and bi-xenon headlights. The interior featured wood trim accents and a generally upscale ambiance.
Optional extras were plentiful, allowing buyers to customize their SL 280 to their preferences. Popular options included the COMAND infotainment system with navigation, a panoramic sunroof, active body control suspension (ABC), and various interior trim upgrades. The AIRSCARF system, which directed warm air onto the occupants’ necks, was also a popular option, enhancing open-top driving comfort. The SL 280 was generally offered in a range of exterior colors, with metallic paint finishes being a common choice.
Chassis & Braking
The SL 280 utilized a lightweight aluminum chassis, contributing to its relatively low curb weight of 1750 kg (3858.09 lbs). The suspension system consisted of independent multi-link suspension at both the front and rear, with coil springs and shock absorbers. This setup provided a comfortable ride quality while maintaining good handling characteristics.
Braking duties were handled by ventilated disc brakes at all four corners, providing ample stopping power. The SL 280 was equipped with ABS (Anti-lock Braking System) as standard, enhancing safety and stability during braking maneuvers. The steering system was a hydraulic power-assisted rack and pinion setup, offering precise and responsive steering feel. Standard tire size was 255/45 R 17, mounted on 8.5 J x 17 inch wheels.
Market Reception & Comparison
The SL 280 was generally well-received by automotive critics as a comfortable and refined grand tourer. It was praised for its smooth ride, luxurious interior, and relatively fuel-efficient engine. However, some critics noted that its performance was not as exhilarating as that of the higher-powered SL models.
Compared to the SL 350, the SL 280 offered a more affordable entry point into the SL-Class range. The SL 350, with its larger 3.5-liter V6 engine, provided noticeably more power and quicker acceleration. However, the SL 280’s fuel economy was slightly better. In terms of reliability, the SL 280’s M 272 engine proved to be generally reliable, particularly in later production years. However, as with any luxury vehicle, maintenance costs could be significant.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | SL |
| Generation | SL (R230, facelift 2008) |
| Type | SL 280 V6 (231 Hp) 7G-TRONIC |
| Start of production | April, 2008 |
| End of production | December, 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Roadster |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (urban) | 13.5 l/100 km (17.4 US mpg) |
| Fuel consumption (extra urban) | 7 l/100 km (33.6 US mpg) |
| Fuel consumption (combined) | 9.4 l/100 km (25 US mpg) |
| CO2 emissions | 224 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.8 sec |
| Acceleration 0 – 62 mph | 7.8 sec |
| Acceleration 0 – 60 mph | 7.4 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 7.6 kg/Hp |
| Weight-to-torque ratio | 5.8 kg/Nm |
| Power | 231 Hp @ 6000 rpm |
| Torque | 300 Nm @ 2500-5000 rpm (221.27 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 272.949 |
| Engine displacement | 2996 cm3 (182.83 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 88 mm (3.46 in.) |
| Piston Stroke | 82.1 mm (3.23 in.) |
| Compression ratio | 11.3:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant capacity | 11 l (11.62 US qt | 9.68 UK qt) |
| Kerb Weight | 1750 kg (3858.09 lbs.) |
| Max. weight | 2120 kg (4673.8 lbs.) |
| Max load | 370 kg (815.71 lbs.) |
| Trunk (boot) space – minimum | 235 l (8.3 cu. ft.) |
| Trunk (boot) space – maximum | 339 l (11.97 cu. ft.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Length | 4562 mm (179.61 in.) |
| Width | 1820 mm (71.65 in.) |
| Height | 1317 mm (51.85 in.) |
| Wheelbase | 2560 mm (100.79 in.) |
| Drive wheel | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | Automatic transmission |
Legacy
The Mercedes-Benz SL 280, while not the most powerful variant of the R230 generation, remains a desirable used car option. Its combination of luxury, comfort, and reasonable running costs makes it an attractive choice for buyers seeking a classic roadster experience. The M 272 engine, when properly maintained, has proven to be relatively reliable. However, potential buyers should be aware of the potential for balance shaft sprocket wear in earlier models and ensure that all scheduled maintenance has been performed. Today, the SL 280 represents a relatively affordable entry point into the world of Mercedes-Benz SL ownership, offering a stylish and refined driving experience at a reasonable price.
