The Mercedes-Benz S-Class Long (V220 facelift), produced from 2002 to 2005, represented a significant evolution of the flagship S-Class sedan. The S 350 V6 variant, equipped with a 3.7-liter engine and the 5G-TRONIC automatic transmission, occupied a crucial position in the lineup, offering a balance of luxury, performance, and efficiency. This long-wheelbase version, primarily aimed at markets where rear passenger space was highly valued, provided an extended cabin for enhanced comfort. It was a key model in maintaining Mercedes-Benz’s reputation for automotive excellence and technological innovation.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | S-Class |
| Generation | S-Class Long (V220, facelift 2002) |
| Type (Engine) | S 350 V6 (245 Hp) 5G-TRONIC |
| Start of production | 2002 |
| End of production | 2005 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 16.4 l/100 km (14.3 US mpg, 17.2 UK mpg, 6.1 km/l) |
| Fuel consumption (extra urban) | 8.1 l/100 km (29 US mpg, 34.9 UK mpg, 12.3 km/l) |
| Fuel consumption (combined) | 11.1 l/100 km (21.2 US mpg, 25.4 UK mpg, 9 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.3 sec |
| Acceleration 0 – 62 mph | 7.3 sec |
| Acceleration 0 – 60 mph | 6.9 sec |
| Maximum speed | 246 km/h (152.86 mph) |
| Weight-to-power ratio | 7.1 kg/Hp, 141.2 Hp/tonne |
| Weight-to-torque ratio | 5 kg/Nm, 201.7 Nm/tonne |
| Power | 245 Hp @ 5700 rpm |
| Power per litre | 65.8 Hp/l |
| Torque | 350 Nm @ 3000 rpm (258.15 lb.-ft. @ 3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 112 E 37/112.975 |
| Engine displacement | 3724 cm3 (227.25 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 97 mm (3.82 in.) |
| Piston Stroke | 84 mm (3.31 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 3 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant | 10.5 l (11.1 US qt | 9.24 UK qt) |
| Kerb Weight | 1735 kg (3825.02 lbs.) |
| Max. weight | 2370 kg (5224.96 lbs.) |
| Max load | 635 kg (1399.94 lbs.) |
| Trunk (boot) space – maximum | 500 l (17.66 cu. ft.) |
| Fuel tank capacity | 88 l (23.25 US gal | 19.36 UK gal) |
| Length | 5163 mm (203.27 in.) |
| Width | 1855 mm (73.03 in.) |
| Width including mirrors | 2092 mm (82.36 in.) |
| Height | 1444 mm (56.85 in.) |
| Wheelbase | 3085 mm (121.46 in.) |
| Front track | 1574 mm (61.97 in.) |
| Rear (Back) track | 1574 mm (61.97 in.) |
| Front overhang | 872 mm (34.33 in.) |
| Rear overhang | 1206 mm (47.48 in.) |
| Minimum turning circle | 12.1 m (39.7 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 5 gears, automatic transmission G-TRONIC |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 225/60 R16 |
| Wheel rims size | 16 |
Powertrain & Engine Architecture
The S 350 V6 was powered by the M112 E 37 engine, a 3.7-liter naturally aspirated V6. This engine was a cornerstone of Mercedes-Benz’s mid-range offerings during this period. The M112 featured all-aluminum construction, three valves per cylinder, and a sophisticated multi-port fuel injection system. This design contributed to its relatively smooth operation and respectable power output. The engine produced 245 horsepower at 5700 rpm and 350 Nm (258 lb-ft) of torque at 3000 rpm. The 5G-TRONIC automatic transmission, a five-speed unit, was specifically tuned to provide smooth and refined gear changes, prioritizing comfort over outright performance. This transmission was known for its adaptive learning capabilities, adjusting shift points based on driving style.
Driving Characteristics
The S 350 V6 offered a comfortable and composed driving experience. While not as dynamically engaging as some of its higher-performance S-Class siblings (like the S 500 with its V8), it provided ample power for effortless cruising and overtaking. The 5G-TRONIC transmission, while smooth, could feel somewhat hesitant during quick acceleration compared to the more responsive manual transmissions available in other markets. The gear ratios were optimized for fuel efficiency and relaxed highway driving. The long wheelbase contributed to a stable and comfortable ride, effectively isolating passengers from road imperfections.
Equipment & Trim Levels
The S 350 V6 came standard with a comprehensive array of luxury features, befitting its flagship status. These included leather upholstery, wood trim, automatic climate control, power-adjustable seats with memory function, and a premium audio system. Optional extras included a sunroof, upgraded audio systems (such as Harman Kardon), rear seat entertainment, and various driver-assistance systems like Distronic adaptive cruise control. The long-wheelbase configuration added significantly to rear passenger legroom, making it a popular choice for those who frequently traveled with passengers in the back.
Chassis & Braking
The S-Class V220 featured a fully independent suspension system, utilizing double wishbones at the front and a multi-link setup at the rear. This configuration provided a comfortable ride and good handling characteristics. The S 350 V6 was equipped with disc brakes on all four wheels, coupled with ABS (Anti-lock Braking System) and Electronic Stability Program (ESP) for enhanced safety. 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 S 350 V6 was generally well-received by automotive critics. It was praised for its comfortable ride, luxurious interior, and refined powertrain. However, some reviewers noted that its performance was not as exhilarating as that of the V8-powered S 500. Compared to the S 430, the S 350 offered a more affordable entry point into the S-Class range, while still providing a high level of luxury and refinement. Fuel economy was a strong point for the S 350, making it a more practical choice for those who prioritized efficiency. The S 350 was positioned as a sensible luxury option, appealing to buyers who valued comfort and prestige over outright performance.
Legacy
The M112 engine, in general, proved to be a reliable and durable powerplant. The 5G-TRONIC transmission, while occasionally requiring maintenance, also demonstrated good longevity. Today, well-maintained S 350 V6 models from this era are sought after by enthusiasts who appreciate their classic Mercedes-Benz styling and comfortable driving experience. Common issues include wear and tear on suspension components and potential leaks in the hydraulic systems. However, parts availability remains relatively good, and the S 350 V6 continues to represent a compelling value proposition in the used luxury car market.
