The Mercedes-Benz W113 SL, affectionately known as the “Pagoda SL,” represented a significant evolution in the iconic SL lineage. Produced between 1963 and 1971, the W113 offered a blend of luxury, performance, and sophisticated styling. The 250 SL, manufactured from December 1966 to January 1968, occupied a crucial middle ground within the W113 range, bridging the gap between the earlier 230 SL and the later, more powerful 280 SL. This variant, particularly when equipped with the four-speed automatic transmission, aimed to provide a more relaxed and accessible grand touring experience compared to its manual-transmission siblings.
The 250 SL Automatic: Positioning and Overview
The 250 SL was introduced as a replacement for the 230 SL, featuring a larger 2.5-liter engine. The automatic transmission option was a key component of the 250 SL’s appeal to buyers seeking a comfortable and refined driving experience. It wasn’t positioned as the outright performance leader – that role belonged to the manual transmission versions – but rather as a luxurious cruiser. Within the W113 lineup, the 250 SL Automatic sat between the more affordable and sport-oriented 230 SL and the top-of-the-line 280 SL, which offered even more power and features. The 250 SL aimed for a balance, offering a noticeable power increase over the 230 SL without the higher price tag of the 280 SL.
Powertrain & Engine Architecture
The heart of the 250 SL was the M 129.982 engine, a 2.5-liter (2496 cc) inline-six cylinder powerplant. This engine featured a cast iron block and an aluminum cylinder head, a common configuration for Mercedes-Benz engines of the era. It produced 150 horsepower at 5500 rpm and 216 Nm (159.31 lb-ft) of torque at 4200 rpm. The engine utilized multi-port manifold fuel injection, a relatively advanced system for the time, contributing to improved fuel efficiency and smoother operation. The valvetrain employed a single overhead camshaft (SOHC) design with two valves per cylinder.
The automatic transmission paired with the 250 SL was a four-speed unit, designed to provide smooth and effortless gear changes. While not known for its blistering acceleration, the transmission was well-suited to the car’s grand touring character. The transmission’s gear ratios were optimized for comfortable cruising, prioritizing relaxed highway driving over aggressive acceleration. The automatic transmission was a popular choice, particularly in the North American market, where buyers often favored convenience over outright performance.
Driving Characteristics
The 250 SL Automatic offered a distinctly different driving experience compared to the manual transmission versions. While the manual offered a more engaging and sporty feel, the automatic prioritized comfort and ease of use. Acceleration from 0-60 mph was around 10.1 seconds, and 0-100 km/h took approximately 10.6 seconds. Top speed was rated at 190 km/h (118.06 mph). The automatic transmission did slightly diminish the car’s overall performance, but it also made it more accessible to a wider range of drivers. The power delivery was smooth and linear, making it easy to modulate the throttle and maintain a comfortable cruising speed. The automatic transmission’s shift points were generally well-chosen, providing adequate power for most driving situations. However, drivers seeking more spirited performance might find the transmission somewhat sluggish compared to modern automatics.
Equipment & Trim Levels
The 250 SL Automatic came standard with a respectable level of equipment for its time. Standard features included leather upholstery, a wood-trimmed dashboard, and a comprehensive instrument cluster. Power steering and power-assisted disc brakes were also standard. The interior was designed with comfort and elegance in mind, offering a refined and luxurious driving environment. Optional extras included a radio, air conditioning, and a hardtop in addition to the standard soft top. The interior trim options were relatively limited, typically offering a choice of leather colors and wood finishes. The overall aesthetic was one of understated elegance, reflecting Mercedes-Benz’s commitment to quality and craftsmanship.
Chassis & Braking
The W113 SL chassis was a robust and well-engineered design. The 250 SL utilized a coil spring and double wishbone suspension at the front, providing a comfortable ride and good handling characteristics. The rear suspension employed coil springs. The front suspension also incorporated a transverse stabilizer bar to reduce body roll during cornering. Braking duties were handled by disc brakes on all four wheels, providing ample stopping power. The steering system was a cone worm with recirculation balls, offering precise and responsive steering feel. The 185 HR 14 tires provided adequate grip for the car’s performance capabilities. The curb weight of the 250 SL Automatic was approximately 1360 kg (2998.29 lbs).
Market Reception & Comparison
The 250 SL Automatic was generally well-received by automotive critics. It was praised for its comfortable ride, refined interior, and smooth-shifting automatic transmission. However, some critics noted that the automatic transmission slightly diminished the car’s overall performance compared to the manual transmission versions. Fuel economy was rated at 11.2 l/100 km (21 US mpg, 25.2 UK mpg, 8.9 km/l). Compared to the 230 SL, the 250 SL offered a noticeable power increase and improved refinement. Compared to the 280 SL, the 250 SL was more affordable and offered a slightly more manageable driving experience. The 250 SL Automatic appealed to buyers who prioritized comfort and convenience over outright performance, making it a popular choice for grand touring enthusiasts.
Technical Specifications
| Engine Model/Code | M 129.982 |
| Engine Displacement | 2496 cm3 (152.32 cu. in.) |
| Number of Cylinders | 6, Inline |
| Cylinder Bore | 82 mm (3.23 in.) |
| Piston Stroke | 78.8 mm (3.1 in.) |
| Compression Ratio | 9.5:1 |
| Number of Valves per Cylinder | 2 |
| Fuel Injection System | Multi-port manifold injection |
| Engine Aspiration | Naturally aspirated |
| Power | 150 Hp @ 5500 rpm |
| Torque | 216 Nm @ 4200 rpm (159.31 lb.-ft. @ 4200 rpm) |
| Engine Oil Capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Coolant Capacity | 12.9 l (13.63 US qt | 11.35 UK qt) |
| Kerb Weight | 1360 kg (2998.29 lbs.) |
| Max. Weight | 1715 kg (3780.93 lbs.) |
| Max Load | 355 kg (782.64 lbs.) |
| Trunk (boot) Space | 340 l (12.01 cu. ft.) |
| Fuel Tank Capacity | 82 l (21.66 US gal | 18.04 UK gal) |
| Length | 4285 mm (168.7 in.) |
| Width | 1760 mm (69.29 in.) |
| Height | 1320 mm (51.97 in.) |
| Wheelbase | 2400 mm (94.49 in.) |
| Transmission | 4 gears, automatic transmission |
Legacy
The 250 SL Automatic remains a highly sought-after classic car today. Its combination of elegant styling, comfortable ride, and reliable powertrain has ensured its enduring appeal. While the automatic transmission may not be as desirable to some enthusiasts as the manual, it continues to attract buyers who appreciate its ease of use and relaxed driving experience. The M 129 engine, when properly maintained, is known for its durability and longevity. However, like any classic car, the 250 SL requires regular maintenance and attention to detail. Parts availability can be a challenge, but a thriving aftermarket supports the W113 community. The 250 SL Automatic represents a significant chapter in Mercedes-Benz’s SL history, offering a unique blend of luxury, performance, and timeless style.
