The 2007 Mercedes-Benz S550 is a sophisticated luxury sedan powered by a robust 5.5-liter V8 engine. Keeping this vehicle running smoothly requires more than just following the factory manual; it demands fluids that can handle the unique stresses of European engineering. AMSOIL synthetic lubricants are specifically designed to exceed the demands of modern engines, providing superior protection against wear, sludge, and temperature extremes. Whether you are tackling long highway commutes or pushing your vehicle in severe driving conditions, the right fluids are essential for longevity.
Recommended AMSOIL Products
For the 2007 Mercedes Benz S550, AMSOIL offers a comprehensive lineup of premium lubricants designed for European vehicles. These products ensure maximum protection and performance.
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – Engineered with a precise blend of synthetic base oils and premium additives specifically for the unique demands of gasoline, diesel, and hybrid European vehicles.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – A robust synthetic option designed to protect European engines against wear and provide excellent flow at low temperatures.
- AMSOIL Oil Filter – Delivers 99 percent filtering efficiency at 20 microns, offering greater capacity for contaminants than competing filters to help reduce engine wear.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing and elevated temperatures while remaining fluid in sub-zero conditions, providing reserve protection during severe use.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Formulated to provide protection against wear for automatic transmissions requiring OE specifications.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Provides excellent ABS and traction-control responsiveness with stable viscosity over a wide temperature range.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Reduces friction, helps seals remain soft to prevent leaks, and offers strong anti-wear protection for long fluid life.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique poly-organic acid formulation that protects all cooling system metals, gaskets, and hoses for up to 150,000 miles.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated option requiring mixing with distilled water, offering protection up to 150,000 miles or 5 years.
Engine Oil and Filtration Specifications
The heart of your 2007 S550 is the 5.5L V8 engine (Engine Code 273.961.2). This powerhouse requires a lubricant that can maintain viscosity under high heat while flowing quickly during cold starts. The engine oil capacity is 9.0 quarts when performed with a filter change. This figure is critical to ensure the crankshaft and bearings are fully submerged in the proper amount of lubricant. Overfilling or underfilling can lead to poor performance or seal damage.
For this application, two distinct viscosity grades of AMSOIL 5W-40 FS 100% Synthetic European Motor Oil are recommended. The AMSOIL 0W-40 offers extended cold-weather performance. Both options feature a European formula designed to meet the precise requirements of Mercedes-Benz engines, preventing the formation of sludge and deposits that can clog oil galleries in high-mileage vehicles.
Pairing this premium oil with the AMSOIL Oil Filter ensures that the engine is protected from the smallest contaminants. The filter media is engineered to capture wear-causing particles more effectively than standard filters. For those preferring an aftermarket alternative, the WIX Oil Filter is also a compatible option that offers premium media improvements over original equipment manufacturer-branded filters.
Transmission and Cooling System Care
The automatic transmission in the S550, specifically the 722.9 series, operates under significant thermal and mechanical stress. AMSOIL provides two specialized fluids for this system. The AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is designed to withstand the rigors of heavy towing and elevated temperatures, while also maintaining fluidity in sub-zero conditions. It provides reserve protection during heavy use and abuse.
Alternatively, the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid offers robust protection against wear for vehicles requiring OE specifications. Maintaining these fluids is vital to prevent costly transmission repairs and ensure smooth gear shifts.
The cooling system of the S550 requires a coolant that protects aluminum components and rubber seals without sacrificing flow. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a 50/50 pre-mix formulation that is phosphate, nitrate, nitrite, silicate, borate, and amine-free. It protects all cooling system metals and provides service life up to 150,000 miles or 5 years. For those who prefer a concentrated solution, the AMSOIL Propylene Glycol Antifreeze allows for mixing with distilled water, offering protection up to 150,000 miles in passenger cars.
Brake and Power Steering Fluids
Safety and control are paramount in a luxury sedan. The brake fluid must maintain a stable viscosity over a wide temperature range to ensure consistent pedal feel and ABS responsiveness. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is specifically recommended for this vehicle, providing excellent performance in both low and high-temperature environments.
Similarly, the power steering system benefits from the AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid. This fluid resists heat, keeps seals soft to prevent leaks, and reduces friction for quieter operation. It offers high-temperature protection and low-temperature performance, ensuring your steering remains responsive in all weather conditions.
About the Vehicle
The 2007 Mercedes-Benz S550 represents the pinnacle of mid-2000s German automotive engineering, sitting within the iconic W220 generation of the S-Class lineup. This full-size luxury sedan was renowned for its “magic carpet” ride quality, combining plush comfort with surprising agility for its substantial size. Under the hood, the S550 houses the 5.5-liter M273 V8 engine, a naturally aspirated powerplant that delivers a smooth and linear power curve rather than aggressive torque spikes. This engine was designed for durability and refinement, producing power that feels effortless on the highway.
The S550 was a flagship model, often chosen by executives and diplomats who required a vehicle that projected authority and reliability. It features advanced electronic systems for its time, including the AIRMATIC air suspension, which allows the driver to adjust ride height and damping to suit various road conditions. The interior is a sanctuary of leather, wood, and chrome, offering rear-seat entertainment and cooling capabilities that set the standard for the industry. Owners of the S550 appreciate the balance between the vehicle’s substantial weight and its nimble handling, making it a pleasure to drive despite its length.
However, with age comes specific maintenance needs common to high-mileage German luxury sedans. Owners frequently report issues related to the valve cover gaskets and the thermostat housing, which can lead to oil leaks or coolant loss. These gaskets become brittle over time due to thermal cycling. Using high-quality synthetic oils like AMSOIL 5W-40 FS can help mitigate oil consumption and reduce the stress on these aging seals by maintaining better lubrication and cleaning properties. Another common issue involves the power steering pump and rack, which can develop leaks or noise as the vehicle ages. Synthetic power steering fluid can help condition seals and reduce friction, potentially extending the life of these components and improving the quality of the steering feel.
Cooling system failures are also a known concern in the W220 chassis, particularly in older models where plastic components in the radiator or coolant pipes can become brittle and crack. A robust antifreeze formulation with excellent corrosion inhibitors is crucial to prevent electrolysis and corrosion from accelerating these failures. Furthermore, the automatic transmission in these vehicles can sometimes suffer from harsh shifting or fluid breakdown if not maintained with the correct specifications. Using a high-performance synthetic transmission fluid helps maintain proper viscosity and friction characteristics, reducing the likelihood of transmission slipping or shifting issues. By proactively addressing these potential problem areas with superior lubricants, owners can significantly extend the service life of their S550 and maintain its reputation as a reliable luxury cruiser.