The Mercedes-Benz R107 generation SL, produced from 1971 to 1989, represented a significant evolution for the iconic roadster. The 350 SL V8, introduced in November 1970 and continuing through February 1976, was a cornerstone of the early R107 lineup. Positioned as a mid-range offering, it bridged the gap between the entry-level 280 SL and the more potent 450 SL, offering a blend of performance and luxury. The R107 was designed to succeed the W113 “Pagoda” SL, and aimed to provide a more modern, comfortable, and safer grand touring experience while retaining the classic roadster appeal. It was primarily marketed towards North American buyers, where it found considerable success, and became a symbol of aspirational luxury.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | SL |
| Generation | SL (R107) |
| Type (Engine) | 350 SL V8 (200 Hp) |
| Start of production | November, 1970 |
| End of production | February, 1976 |
| 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 | 8.8 sec |
| Acceleration 0 – 62 mph | 8.8 sec |
| Acceleration 0 – 60 mph | 8.4 sec |
| Maximum speed | 210 km/h (130.49 mph) |
| Weight-to-power ratio | 7.7 kg/Hp, 129.9 Hp/tonne |
| Weight-to-torque ratio | 7.3 kg/Nm, 137 Nm/tonne |
| Power | 200 Hp @ 5800 rpm |
| Power per litre | 57.2 Hp/l |
| Torque | 211 Nm @ 4000 rpm (155.63 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 116 E 35 / 116.982 |
| 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 | 9.5:1 |
| 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.) |
| Trunk (boot) space – maximum | 252 l (8.9 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Permitted trailer load with brakes (12%) | 1200 kg (2645.55 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| 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.) |
| Minimum turning circle | 10.34 m (33.92 ft.) |
| Drivetrain Architecture | 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, 278 mm |
| Rear brakes | Disc, 279 mm |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 205/70 R14 Rear wheel tires: 205/70 R14 |
| Wheel rims size | Front wheel rims: 6.5J x 14 Rear wheel rims: 6.5J x 14 |
Powertrain & Engine Architecture
The heart of the 350 SL was the M116 E 35 3.5-liter V8 engine. This engine, a significant departure from the six-cylinder engines previously used in the SL series, was a robust and relatively lightweight design. It featured a single overhead camshaft (SOHC) per bank, operating two valves per cylinder. The M116 utilized Bosch K-Jetronic mechanical fuel injection, a system known for its reliability and consistent fuel delivery. This system, while not as sophisticated as later electronic fuel injection, provided smooth operation and good performance. The engine’s 9.5:1 compression ratio contributed to its respectable power output of 200 horsepower and 211 Nm (155.63 lb-ft) of torque. The engine was mounted longitudinally in the front of the vehicle, driving the rear wheels. The 4-speed manual transmission was standard, offering a direct connection to the engine’s power.
Driving Characteristics
The 350 SL V8 with the manual transmission offered a balanced driving experience. While not a sports car in the modern sense, it provided ample power for comfortable cruising and spirited driving. Acceleration to 60 mph took approximately 8.4 seconds, and the top speed was around 130 mph. The gear ratios were well-chosen for both highway and city driving, providing good responsiveness. Compared to the later, more powerful 450 SL, the 350 SL felt more nimble and balanced, due to its lower weight. The manual transmission allowed for greater driver control, while the V8 engine delivered a smooth and refined power delivery. The ride quality was generally comfortable, thanks to the independent suspension on all four wheels.
Equipment & Trim Levels
The 350 SL came standard with a respectable level of equipment for its time. Interior appointments included leatherette upholstery (leather was optional), wood trim on the dashboard and center console, and a comprehensive instrument cluster. Standard features included power-assisted steering and brakes, and a four-speed manual transmission. Optional extras included automatic transmission, air conditioning, power windows, and a sunroof. The exterior featured chrome bumpers and trim, and a distinctive hardtop. A soft top was also available, transforming the car into a true open-air roadster.
Chassis & Braking
The R107 SL utilized a robust chassis with independent suspension all around. The front suspension employed double wishbones, while the rear suspension featured a trailing arm design. This setup provided a comfortable ride and good handling characteristics. Braking duties were handled by ventilated discs at the front and solid discs at the rear. The hydraulic power steering made maneuvering the car relatively easy, even at low speeds. The car rode on 6.5J x 14 inch wheels, fitted with 205/70 R14 tires.
Market Reception & Comparison
The 350 SL V8 was generally well-received by automotive critics. It was praised for its comfortable ride, refined engine, and stylish design. Compared to the 280 SL, the 350 SL offered a significant performance boost. However, the 450 SL, with its larger engine and higher power output, was often considered the more desirable model by those seeking maximum performance. The 350 SL offered a good balance between performance, luxury, and price, making it a popular choice for buyers who wanted a capable and comfortable grand tourer. Fuel economy was reasonable for the era, averaging around 18.1 US mpg.
Legacy
The Mercedes-Benz 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 car has gained a strong following among classic car enthusiasts, and well-maintained examples command respectable prices in the used car market. While maintenance can be costly due to the car’s age and complexity, the R107 350 SL remains a desirable and rewarding classic roadster, representing a high point in Mercedes-Benz engineering and design.
