The Mercedes-Benz 260 SE, part of the W126 S-Class range produced from June 1985 to February 1991, represented an entry point into the flagship sedan line. Positioned below the 300 SE and 560 SE, the 260 SE offered a blend of luxury and efficiency, appealing to buyers seeking the S-Class experience without the higher price tag or larger engine displacement. This facelifted W126 model, introduced in 1985, featured subtle but significant updates to the exterior and interior, solidifying its reputation as a technologically advanced and comfortable vehicle for its time. The “SE” designation signified “Sonderausstattung” – special equipment – indicating a higher level of standard features compared to base models.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | S-class |
| Generation | S-class SE (W126, facelift 1985) |
| Type | 260 SE CAT (160 Hp) Automatic |
| Start of production | June, 1985 |
| End of production | February, 1991 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 13.8 l/100 km (17 US mpg, 20.5 UK mpg) |
| Fuel consumption (extra urban) | 9.1 l/100 km (25.8 US mpg, 31 UK mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 10.9 sec |
| Acceleration 0 – 62 mph | 10.9 sec |
| Acceleration 0 – 60 mph | 10.4 sec |
| Maximum speed | 195 km/h (121.17 mph) |
| Weight-to-power ratio | 9.5 kg/Hp |
| Weight-to-torque ratio | 6.9 kg/Nm |
| Power | 160 Hp @ 5800 rpm |
| Power per litre | 61.6 Hp/l |
| Torque | 220 Nm @ 4600 rpm (162.26 lb.-ft. @ 4600 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 103 E 26 / 103.941 |
| Engine displacement | 2599 cm3 (158.6 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 82.9 mm (3.26 in.) |
| Piston Stroke | 80.25 mm (3.16 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 | 6 l (6.34 US qt | 5.28 UK qt) |
| Coolant capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Kerb Weight | 1520 kg (3351.03 lbs.) |
| Max. weight | 2040 kg (4497.43 lbs.) |
| Max load | 520 kg (1146.4 lbs.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Length | 5020 mm (197.64 in.) |
| Width | 1820 mm (71.65 in.) |
| Height | 1437 mm (56.57 in.) |
| Wheelbase | 2930 mm (115.35 in.) |
| Front track | 1555 mm (61.22 in.) |
| Rear track | 1527 mm (60.12 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 4 |
| Gearbox type | Automatic 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 |
| Tires size | 205/65 R15 |
| Wheel rims size | 7J x 15 |
Powertrain & Engine Architecture
The 260 SE was powered by the M103 E 26 engine, a 2.6-liter inline-six cylinder powerplant. This engine, a hallmark of Mercedes-Benz engineering, featured a single overhead camshaft (SOHC) valvetrain and Bosch K-Jetronic fuel injection. The K-Jetronic system, while sophisticated for its time, was known for its mechanical complexity and required precise maintenance. The engine produced 160 horsepower at 5800 rpm and 220 Nm (162 lb-ft) of torque at 4600 rpm. The engine’s longitudinal mounting and rear-wheel drive configuration were standard for Mercedes-Benz sedans of this era. Paired with the M103 was a four-speed automatic transmission, designed for smooth and comfortable shifts. This transmission, while not particularly sporty, was well-suited to the 260 SE’s grand touring character.
Driving Characteristics
The 260 SE Automatic offered a comfortable and refined driving experience, prioritizing smoothness over outright performance. Acceleration from 0 to 60 mph took around 10.4 seconds, and top speed was limited to 195 km/h (121 mph). Compared to the more powerful 300 SE, the 260 SE felt noticeably less energetic, particularly during overtaking maneuvers. The automatic transmission, while providing convenience, contributed to a slight loss of responsiveness. However, the well-tuned suspension and hydraulic power steering ensured a composed and predictable ride, even on less-than-perfect road surfaces. The gear ratios were optimized for fuel efficiency and relaxed cruising, making it an ideal choice for long-distance travel.
Equipment & Trim Levels
The 260 SE came standard with a generous array of features, befitting its S-Class designation. These included power windows, central locking, air conditioning, and a high-quality sound system. Interior upholstery was typically cloth, although leather was available as an option. The dashboard featured wood trim and analog gauges, reflecting the luxurious aesthetic of the era. Optional extras included a sunroof, heated seats, and a more advanced audio system. The 260 SE was often seen as a stepping stone into the S-Class range, offering a good balance of features and affordability.
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 trailing arm setup. This configuration provided a comfortable ride and good handling characteristics. Braking duties were handled by ventilated disc brakes at the front and solid discs at the rear. Power-assisted steering was standard, making maneuvering the large sedan relatively easy. The suspension was tuned for comfort, prioritizing a smooth ride over sporty handling. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The 260 SE was generally well-received by automotive critics, who praised its comfort, build quality, and refinement. However, some reviewers noted that its performance was somewhat underwhelming compared to its larger-engined siblings. Fuel economy was considered reasonable for a luxury sedan of its size, averaging around 13.8 l/100 km (17 mpg) in urban driving and 9.1 l/100 km (26 mpg) on the highway. Compared to the 300 SE, the 260 SE offered a more affordable entry point into the S-Class range, but at the expense of performance. The 260 SE was also more economical to run than the 560 SE, thanks to its smaller engine displacement.
Legacy
The Mercedes-Benz 260 SE, while often overshadowed by its more powerful counterparts, remains a desirable classic car today. The M103 engine is known for its durability and reliability, provided it receives regular maintenance. The K-Jetronic fuel injection system, however, can be a source of problems if not properly maintained. Parts availability is generally good, although some components can be expensive. The 260 SE represents a sweet spot in the W126 range, offering a blend of luxury, comfort, and relative affordability. Well-maintained examples are increasingly sought after by collectors and enthusiasts, appreciating in value as the years pass. The car stands as a testament to Mercedes-Benz’s commitment to engineering excellence and enduring quality.
