The Mercedes-Benz S-Class SE (W126) 500 SE, produced from October 1981 to September 1985, represented a significant leap forward in luxury and engineering for the German automaker. Positioned as a top-tier variant within the W126 generation – which replaced the W116 – the 500 SE featured a powerful 5.0-liter V8 engine paired exclusively with a four-speed automatic transmission. This combination aimed to deliver effortless performance and a refined driving experience, cementing the S-Class’s reputation as a status symbol and technological showcase. The W126 platform itself was a pivotal design, introducing numerous safety and comfort features that would become hallmarks of the S-Class lineage.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | S-class |
| Generation | S-class SE (W126) |
| Type (Engine) | 500 SE V8 (231 Hp) Automatic |
| Start of production | October, 1981 |
| End of production | September, 1985 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 15.2 l/100 km (15.5 US mpg, 18.6 UK mpg, 6.6 km/l) |
| Fuel consumption (extra urban) | 9.1 l/100 km (25.8 US mpg, 31 UK mpg, 11 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.1 sec |
| Acceleration 0 – 62 mph | 8.1 sec |
| Acceleration 0 – 60 mph | 7.7 sec |
| Maximum speed | 225 km/h (139.81 mph) |
| Weight-to-power ratio | 7 kg/Hp, 142.6 Hp/tonne |
| Weight-to-torque ratio | 4 kg/Nm, 250 Nm/tonne |
| Power | 231 Hp @ 4750 rpm |
| Power per litre | 46.5 Hp/l |
| Torque | 405 Nm @ 3000 rpm (298.71 lb.-ft. @ 3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 117 E 50 / 117.963 |
| Engine displacement | 4973 cm3 (303.47 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 96.5 mm (3.8 in.) |
| Piston Stroke | 85 mm (3.35 in.) |
| Compression ratio | 9.2:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | SOHC |
| Engine oil capacity | 9 l (9.51 US qt | 7.92 UK qt) |
| Coolant | 13.5 l (14.27 US qt | 11.88 UK qt) |
| Kerb Weight | 1620 kg (3571.49 lbs.) |
| Max. weight | 2140 kg (4717.89 lbs.) |
| Max load | 520 kg (1146.4 lbs.) |
| Trunk (boot) space – minimum | 505 l (17.83 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Length | 4995 mm (196.65 in.) |
| Width | 1820 mm (71.65 in.) |
| Height | 1436 mm (56.54 in.) |
| Wheelbase | 2930 mm (115.35 in.) |
| Front track | 1545 mm (60.83 in.) |
| Rear (Back) track | 1517 mm (59.72 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: 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 500 SE was the M117 E 50 engine, a 4.97-liter (303.47 cubic inches) naturally aspirated V8. This engine featured a single overhead camshaft (SOHC) design with two valves per cylinder. Bosch K-Jetronic fuel injection was employed, a mechanical system known for its reliability and precise fuel delivery, though less efficient than later electronic systems. The engine produced 231 horsepower at 4750 rpm and 299 lb-ft of torque at 3000 rpm. The four-speed automatic transmission, a robust unit for its time, was designed to provide smooth and comfortable shifts, prioritizing luxury over outright performance. It was a hydraulic controlled transmission, lacking the electronic controls found in later automatics.
Driving Characteristics
The 500 SE offered a distinctly different driving experience compared to its six-cylinder siblings, such as the 280 SE or 380 SE. The V8 provided significantly more power and torque, resulting in effortless acceleration and relaxed highway cruising. While not a sports car, the 500 SE could reach 60 mph in around 7.7 seconds and had a top speed of 139.81 mph. The automatic transmission, while smooth, did result in some power loss compared to a manual transmission (which wasn’t offered with this engine). The gear ratios were tuned for comfort and refinement, rather than aggressive acceleration. The car felt substantial and planted on the road, thanks to its weight and well-tuned suspension.
Equipment & Trim Levels
The 500 SE was generously equipped, reflecting its position as the flagship model. Standard features included power windows, power locks, a sunroof, leather upholstery, and climate control. Wood trim adorned the interior, adding to the luxurious ambiance. Optional extras included a premium sound system, heated seats, and a self-leveling suspension system. The interior layout was classic Mercedes-Benz, emphasizing functionality and understated elegance. The dashboard featured a comprehensive array of gauges, providing the driver with detailed information about the vehicle’s performance.
Chassis & Braking
The W126 S-Class featured a robust chassis with independent suspension at all four wheels. 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 500 SE was equipped with ventilated disc brakes at the front and solid disc brakes at the rear. An Anti-lock Braking System (ABS) was standard, a relatively new technology at the time that significantly improved braking performance and safety. The steering was a recirculating ball system with hydraulic power assistance, providing a comfortable and precise driving experience.
Market Reception & Comparison
The 500 SE was well-received by critics and buyers alike. It was praised for its luxurious interior, smooth ride, and powerful engine. However, its fuel consumption was a concern, particularly in the early 1980s when gasoline prices were rising. Compared to the 280 SE and 380 SE, the 500 SE offered significantly more performance but came at a higher price. The 500 SE was also more complex and potentially more expensive to maintain than its six-cylinder counterparts. It appealed to buyers who prioritized performance and luxury above all else.
Legacy
The M117 engine, found in the 500 SE, is known for its durability and longevity. With proper maintenance, these engines can reliably exceed 200,000 miles. The W126 S-Class, in general, is considered a classic Mercedes-Benz, and the 500 SE is particularly sought after by collectors and enthusiasts. Today, well-maintained examples command a premium in the used car market. While fuel economy is still a concern, the 500 SE remains a compelling choice for those seeking a luxurious and iconic classic automobile. Parts availability is generally good, although some specific components can be difficult to find. The car represents a high point in Mercedes-Benz engineering and design, and its influence can still be seen in modern S-Class models.
