The Mercedes-Benz S-Class SEL 560 SEL, produced from September 1985 to September 1987, represents the pinnacle of luxury and performance within the W126 generation. This long-wheelbase (SEL) variant, equipped with the M117 E 56 5.6-liter V8 engine and a four-speed automatic transmission, was positioned as the flagship model, offering a more refined and powerful experience than its smaller-engined siblings. The W126 S-Class, introduced in 1979, established Mercedes-Benz as a leader in automotive safety and innovation, and the facelifted models of 1985 further enhanced its reputation for quality and engineering excellence. The 560 SEL was primarily marketed towards discerning buyers in North America and Europe who demanded the highest levels of comfort, prestige, and performance.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | S-class |
| Generation | S-class SEL (V126, facelift 1985) |
| Type (Engine) | 560 SEL V8 (272 Hp) Automatic |
| Start of production | September, 1985 |
| End of production | September, 1987 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 17.1 l/100 km (13.8 US mpg, 16.5 UK mpg, 5.8 km/l) |
| Fuel consumption (extra urban) | 10.6 l/100 km (22.2 US mpg, 26.6 UK mpg, 9.4 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.9 sec |
| Acceleration 0 – 62 mph | 6.9 sec |
| Acceleration 0 – 60 mph | 6.6 sec |
| Maximum speed | 238 km/h (147.89 mph) |
| Weight-to-power ratio | 6.7 kg/Hp, 150.3 Hp/tonne |
| Weight-to-torque ratio | 4.2 kg/Nm, 237.6 Nm/tonne |
| Power | 272 Hp @ 5000 rpm |
| Power per litre | 49 Hp/l |
| Torque | 430 Nm @ 3750 rpm (317.15 lb.-ft. @ 3750 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 117 E 56 / 117.968 |
| Engine displacement | 5547 cm3 (338.5 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 96.5 mm (3.8 in.) |
| Piston Stroke | 94.8 mm (3.73 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 | 13.5 l (14.27 US qt | 11.88 UK qt) |
| Kerb Weight | 1810 kg (3990.37 lbs.) |
| Max. weight | 2270 kg (5004.49 lbs.) |
| Max load | 460 kg (1014.13 lbs.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Length | 5160 mm (203.15 in.) |
| Width | 1820 mm (71.65 in.) |
| Height | 1446 mm (56.93 in.) |
| Wheelbase | 3070 mm (120.87 in.) |
| Front track | 1555 mm (61.22 in.) |
| Rear track | 1527 mm (60.12 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, automatic transmission |
| Front suspension | Double wishbone |
| Rear suspension | Threaded twist beam |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 215/65 R15Rear wheel tires: 215/65 R15 |
| Wheel rims size | Front wheel rims: 7J x 15Rear wheel rims: 7J x 15 |
Powertrain & Engine Architecture
The heart of the 560 SEL is the M117 E 56 engine, a 5.6-liter (5547 cc) naturally aspirated V8. This engine, a descendant of the earlier M117 series, featured a cast-iron block and aluminum cylinder heads. It employed a single overhead camshaft (SOHC) valvetrain with two valves per cylinder. Fuel delivery was handled by a Bosch K-Jetronic multi-port fuel injection system, known for its reliability and precise metering. The engine produced 272 horsepower at 5000 rpm and 430 Nm (317 lb-ft) of torque at 3750 rpm. The four-speed automatic transmission, a robust unit designed to handle the engine’s output, provided smooth and relatively quick shifts. It was not an electronically controlled transmission, relying on hydraulic pressure and mechanical linkages for operation.
Driving Characteristics
The 560 SEL offered a distinctly grand touring experience. While not overtly sporty, the combination of the powerful V8 and the automatic transmission delivered brisk acceleration – 0 to 60 mph in approximately 6.6 seconds – and effortless cruising. The automatic transmission, while smooth, wasn’t particularly quick to downshift, meaning that overtaking maneuvers required planning. Compared to the 380 SEL or the later 420 SEL, the 560 SEL provided a significant performance boost. The longer wheelbase of the SEL model contributed to a more comfortable and stable ride, particularly on long journeys. The gear ratios were optimized for relaxed highway driving, prioritizing comfort over outright acceleration.
Equipment & Trim Levels
The 560 SEL came standard with a comprehensive list of luxury features, befitting its flagship status. These included leather upholstery, power-adjustable front seats with memory function, climate control, a premium sound system, and power windows and locks. The SEL also featured a more extensive use of wood trim compared to other S-Class models. Optional extras included a sunroof, rear seat entertainment system, and upgraded sound systems. The interior design emphasized understated elegance and high-quality materials.
Chassis & Braking
The W126 S-Class featured a robust chassis with independent suspension all around. The front suspension utilized double wishbones, while the rear employed a threaded twist beam. This setup provided a comfortable ride and good handling characteristics. The 560 SEL was equipped with ventilated disc brakes at the front and solid disc brakes at the rear. An Anti-lock Braking System (ABS) was standard, enhancing safety and control during hard braking. The steering was a recirculating ball system with hydraulic power assistance, providing a relatively heavy but precise feel.
Market Reception & Comparison
The 560 SEL was generally well-received by automotive critics, who praised its luxurious interior, powerful engine, and comfortable ride. However, its fuel economy was often criticized, reflecting the realities of a large-displacement V8 engine in the 1980s. Compared to the 380 SEL and 420 SEL, the 560 SEL offered a substantial performance advantage but came at a higher price. The 560 SEL was also seen as a more direct competitor to other luxury sedans from BMW and Jaguar.
Legacy
The M117 engine, while not known for being particularly fuel-efficient, is renowned for its durability and longevity. Properly maintained examples of the 560 SEL can still provide reliable service today. The W126 S-Class, and particularly the 560 SEL, has become a sought-after classic car, appreciated for its build quality, timeless design, and luxurious appointments. Parts availability is generally good, although some specific components can be difficult to find. The 560 SEL remains a symbol of 1980s automotive excess and engineering prowess, and continues to be a favorite among Mercedes-Benz enthusiasts.
