The Mercedes-Benz SL (R107) 350 SL V8, produced between February 1976 and March 1980, represents a significant iteration of the iconic SL roadster lineage. Falling within the long-running R107 generation (1971-1989), the 350 SL V8 occupied a sweet spot in the lineup, offering a blend of performance and luxury that appealed to a broad range of buyers. It was positioned as a step up from the six-cylinder models, providing increased power and refinement without reaching the higher price point of the later, more powerful SL variants. The R107 platform was designed to succeed the W113 “Pagoda” SL, aiming for a more modern and comfortable grand touring experience while retaining the classic roadster aesthetic.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | SL |
| Generation | SL (R107) |
| Type (Engine) | 350 SL V8 (195 Hp) |
| Start of production | February, 1976 |
| End of production | March, 1980 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Roadster |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (combined) | 13 l/100 km (18.1 US mpg, 21.7 UK mpg, 7.7 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9.5 sec |
| Acceleration 0 – 62 mph | 9.5 sec |
| Acceleration 0 – 60 mph | 9 sec |
| Maximum speed | 205 km/h (127.38 mph) |
| Weight-to-power ratio | 7.9 kg/Hp, 126.6 Hp/tonne |
| Weight-to-torque ratio | 5.6 kg/Nm, 178.6 Nm/tonne |
| Power | 195 Hp @ 5500 rpm |
| Power per litre | 55.7 Hp/l |
| Torque | 275 Nm @ 4000 rpm (202.83 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 116 E 35 / 116.984 |
| Engine displacement | 3499 cm3 (213.52 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 92 mm (3.62 in.) |
| Piston Stroke | 65.8 mm (2.59 in.) |
| Compression ratio | 9:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | SOHC |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant | 14.3 l (15.11 US qt | 12.58 UK qt) |
| Kerb Weight | 1540 kg (3395.12 lbs.) |
| Max. weight | 1960 kg (4321.06 lbs.) |
| Max load | 420 kg (925.94 lbs.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Length | 4390 mm (172.83 in.) |
| Width | 1790 mm (70.47 in.) |
| Height | 1300 mm (51.18 in.) |
| Wheelbase | 2460 mm (96.85 in.) |
| Front track | 1452 mm (57.17 in.) |
| Rear (Back) track | 1440 mm (56.69 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 4 gears, manual transmission |
| Front suspension | Double wishbone |
| Rear suspension | Trailing arm |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 205/70 R14Rear wheel tires: 205/70 R14 |
| Wheel rims size | Front wheel rims: 6.5J x 14Rear wheel rims: 6.5J x 14 |
Powertrain & Engine Architecture
The heart of the 350 SL V8 is the M116 E 35 engine, a 3.5-liter naturally aspirated V8. This engine, a cornerstone of Mercedes-Benz’s engineering prowess during the 1970s, featured a single overhead camshaft (SOHC) design per bank, operating two valves per cylinder. The M116 utilized Bosch K-Jetronic fuel injection, a mechanical system known for its reliability and precise fuel delivery. This system, while not as sophisticated as later electronic fuel injection, provided smooth operation and good fuel economy for the time. The engine’s 9:1 compression ratio contributed to its robust torque output. The 4-speed manual transmission was standard, providing a direct connection to the rear wheels. While an automatic transmission was available, the manual was favored by enthusiasts for its improved responsiveness and driver engagement.
Driving Characteristics
The 350 SL V8 offered a refined and comfortable driving experience. With 195 horsepower and 275 Nm (203 lb-ft) of torque, acceleration to 60 mph took around 9.5 seconds, respectable for a grand tourer of the era. The manual transmission allowed for precise control, while the V8 engine delivered a smooth and linear power delivery. Compared to the later 450 SL, the 350 SL felt more balanced and nimble, with less weight over the front axle. The gear ratios in the 4-speed manual were well-chosen for both cruising and spirited driving, providing adequate acceleration in most situations. While not a sports car, the 350 SL V8 offered a satisfying blend of performance and comfort.
Equipment & Trim Levels
The 350 SL V8 came reasonably well-equipped as standard. Interior appointments included leather upholstery, wood trim, and a comprehensive instrument cluster. Power steering and four-wheel disc brakes were also standard features. Optional extras included air conditioning, a sunroof, and upgraded audio systems. The exterior was typically finished in a single color, with a wide range of options available. The overall aesthetic was one of understated elegance, reflecting Mercedes-Benz’s commitment to quality and refinement.
Chassis & Braking
The R107 chassis featured independent suspension all around, with double wishbones at the front and a trailing arm setup at the rear. This configuration provided a comfortable ride and good handling characteristics. The 350 SL V8 utilized ventilated disc brakes at the front and solid discs at the rear, providing adequate stopping power for its weight and performance. Hydraulic power steering was standard, making the car easy to maneuver at low speeds. The suspension was tuned for comfort, but also provided a reasonable level of control in corners.
Market Reception & Comparison
The 350 SL V8 was well-received by critics and buyers alike. It was praised for its comfortable ride, refined engine, and elegant styling. Compared to the six-cylinder SL models, the 350 SL offered a significant performance upgrade. However, it was more expensive than the base models, positioning it as a premium offering. Compared to the later 450 SL, the 350 SL was often preferred by enthusiasts for its lighter weight and more balanced handling. Fuel economy was typical for a V8 of the era, around 18.1 US mpg combined.
Legacy
The Mercedes-Benz SL (R107) 350 SL V8 has proven to be a remarkably durable and reliable vehicle. The M116 engine is known for its longevity, and many examples are still on the road today. The R107 generation as a whole has gained a strong following among classic car enthusiasts, and the 350 SL V8 is particularly sought after for its balance of performance, comfort, and style. In the used car market, well-maintained examples command a premium, reflecting their enduring appeal and build quality. The 350 SL V8 remains a testament to Mercedes-Benz’s engineering excellence and a desirable classic roadster.
