2009-2011 Mercedes-Benz S-class (W221 facelift ) S 500 V8 (388 Hp) 4MATIC G-TRONIC

The Mercedes-Benz S 500 4MATIC, produced from 2009 to 2011, represents a significant iteration of the W221 S-Class generation, following the facelift introduced in 2009. This model combined a naturally aspirated 5.5-liter V8 engine with a seven-speed G-TRONIC automatic transmission and Mercedes’ 4MATIC all-wheel-drive system. Positioned as a high-performance, luxury offering within the S-Class range, it sat above the S 350 and S 450 models, but below the even more potent S 600 and S 63 AMG variants. The W221 facelift brought revised styling, updated technology, and improved efficiency compared to the pre-facelift models, solidifying the S-Class’s reputation as a benchmark for automotive luxury and innovation.

Powertrain & Engine Architecture

The heart of the S 500 4MATIC is the M273.968 engine, a 5.5-liter (5461 cc) naturally aspirated V8. This engine utilizes a three-valve-per-cylinder design (two intake, one exhaust) and multi-port fuel injection. The M273 engine family was known for its smooth power delivery and relatively high specific output. It produces 388 horsepower (hp) at 6000 rpm and 530 Newton-meters (390.91 lb-ft) of torque between 2800 and 4800 rpm. The compression ratio is 10.7:1. The engine’s block is constructed from aluminum, contributing to weight reduction.

The engine is paired with the 7G-TRONIC automatic transmission, a seven-speed unit renowned for its smooth and responsive shifts. This transmission features a torque converter lock-up clutch to improve efficiency and a wide range of gear ratios to optimize performance and fuel economy. The 7G-TRONIC also incorporates adaptive shift programming, adjusting shift points based on driving style and road conditions. The 4MATIC all-wheel-drive system distributes power between the front and rear axles, enhancing traction and stability, particularly in adverse weather conditions. The default power split is typically 40% front / 60% rear, but this can vary dynamically based on sensor inputs.

Engine Code Specifics

The M273.968 engine code designates this specific variant of the 5.5-liter V8. Early versions of the M273 engine were known to experience issues with balance shaft sprocket wear, potentially leading to engine noise and, in severe cases, engine damage. Mercedes-Benz issued service bulletins and revised components to address this issue, and the engines produced during and after the 2009 facelift generally benefited from these improvements. Regular oil changes with the correct specification oil are crucial for maintaining the longevity of this engine.

Driving Characteristics

The S 500 4MATIC delivers a refined and powerful driving experience. The 5.5-liter V8 provides ample torque throughout the rev range, resulting in strong acceleration. Mercedes-Benz claimed a 0-60 mph time of 5.1 seconds and a 0-100 km/h time of 5.4 seconds. The 7G-TRONIC transmission contributes to smooth and seamless gear changes, enhancing the overall driving comfort. The 4MATIC system provides excellent grip and stability, inspiring confidence in various driving conditions.

Compared to the S 350, the S 500 offers significantly more power and acceleration. While the S 350 prioritizes fuel efficiency, the S 500 focuses on providing a more engaging and dynamic driving experience. Compared to the higher-performance S 63 AMG, the S 500 offers a more balanced blend of luxury and performance, lacking the AMG’s aggressive styling and track-focused tuning. The gear ratios of the 7G-TRONIC are tuned for both acceleration and highway cruising, providing a comfortable and efficient experience at higher speeds.

Equipment & Trim Levels

The S 500 4MATIC came standard with a comprehensive array of luxury features. Standard equipment typically included leather upholstery, wood trim, a premium sound system, dual-zone automatic climate control, power-adjustable and heated front seats with memory function, a sunroof, and bi-xenon headlights. The S-Class was also equipped with a host of advanced safety features, including ABS, ESP, and multiple airbags.

Optional extras were plentiful, allowing buyers to customize their S 500 to their preferences. Popular options included rear seat entertainment, a massaging function for the seats, a panoramic sunroof, a night vision system, and advanced parking assist features. Interior color combinations and trim materials could also be customized. The S 500 4MATIC generally represented a well-equipped vehicle even in its base form, offering a high level of luxury and comfort.

Chassis & Braking

The W221 S-Class features a fully independent suspension system, utilizing air suspension with Adaptive Damping System (ADS) as standard. This system automatically adjusts the damping characteristics based on road conditions and driving style, providing a smooth and comfortable ride. The front suspension utilizes a multi-link design, while the rear suspension employs a multi-link setup with air springs.

The braking system consists of disc brakes on all four wheels. ABS (Anti-lock Braking System) and ESP (Electronic Stability Program) are standard features, enhancing braking performance and stability. The S 500 4MATIC typically features larger brake rotors and calipers compared to the lower-trim models. The steering system is a rack-and-pinion setup with speed-sensitive power assistance.

Market Reception & Comparison

The S 500 4MATIC was generally well-received by automotive critics. It was praised for its powerful engine, smooth ride, luxurious interior, and advanced technology. However, some critics noted the relatively high fuel consumption compared to the smaller-engined models. Fuel economy figures ranged from 11.3-11.4 l/100 km (20.8-20.6 US mpg) combined.

In terms of reliability, the M273 engine, while generally robust, was known for potential balance shaft issues as mentioned earlier. The 7G-TRONIC transmission proved to be a reliable unit, but required regular fluid changes. Compared to the S 450, the S 500 offered a noticeable performance advantage, justifying the higher price tag for buyers seeking more power. Compared to the S 600, the S 500 provided a more accessible entry point into the top-tier S-Class performance range.

Technical Specifications

Legacy

The S 500 4MATIC (W221 facelift) remains a desirable used luxury car. The M273 engine, when properly maintained, can provide many years of reliable service. However, potential buyers should be aware of the potential balance shaft issues and ensure that the vehicle has received the necessary service updates. The 7G-TRONIC transmission is generally considered durable, but regular fluid changes are essential.

Today, these vehicles offer a significant amount of luxury and performance for their price point. The W221 S-Class, particularly the facelift models, are appreciated for their comfortable ride, spacious interior, and advanced technology. While newer S-Class generations offer even more features and efficiency, the W221 S 500 4MATIC continues to represent a compelling option for buyers seeking a high-end luxury sedan.