Keeping your 2009 Mercedes-Benz CL550 running smoothly requires more than just following a generic maintenance schedule. This luxury grand coupe is powered by the robust 5.5L M273 V8 engine, a powerplant that demands precise lubrication to handle its high performance requirements. Proper maintenance ensures the complex valve train, the high-pressure fuel system, and the delicate components within the 722.9 transmission receive the protection they need to operate efficiently for years to come. Using the correct fluids is essential for maintaining the vehicle’s reputation for smooth power delivery and engineering excellence.
Recommended AMSOIL Products
To ensure your CL550 receives the highest level of protection available, we have selected the top-tier lubricants and filters designed specifically for European engineering standards. These products offer superior thermal stability, extended service life, and enhanced wear protection compared to conventional alternatives.
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – This oil is engineered for the unique demands of gasoline and hybrid European vehicles, featuring a precise blend of synthetic base oils and premium additives to ensure excellent performance in both cold starts and high-temperature operation.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – An excellent alternative for extreme temperature conditions, this synthetic formula provides superior engine cleanliness and protection while maintaining optimal flow characteristics for the M273 engine.
- AMSOIL Oil Filter – Designed to maximize filtering efficiency, this filter helps reduce engine wear by capturing small, wear-causing contaminants more effectively than standard filters, ensuring the longevity of your high-revving V8.
- WIX Oil Filter – A premium aftermarket option that offers improvements over original equipment manufacturer-branded filters, ensuring reliable protection during your oil change intervals.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands the rigors of heavy use and elevated temperatures, this fluid remains fluid in sub-zero temperatures and is ideal for the 7-speed automatic transmission found in this model.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A fuel-efficient synthetic solution that protects against wear while providing a smooth shift feel, suitable for both standard and reduced-friction versions of the transmission.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Offers excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range, exceeding MB Sheet 331.0 requirements.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Reduces friction and helps seals remain soft to prevent leaks, providing strong anti-wear protection and excellent high-temperature performance for quiet operation.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique poly-organic acid formulation that protects cooling system metals, gaskets, and hoses, allowing for extended intervals up to 150,000 miles.
The 2009 Mercedes-Benz CL550 is equipped with the M273 5.5L V8 engine, a sophisticated powerplant known for its balance of power and refinement. When performing an oil change, it is crucial to note that the engine capacity is 9.0 quarts, which includes the oil filter replacement. After refilling, always check the oil level to ensure it is within the correct operating range. For cooling system maintenance, the system requires a total of 12.7 quarts of antifreeze. When servicing the automatic transmission, the total fill capacity for the 7-speed 722.9 unit is approximately 10.4 quarts. It is important to verify if your vehicle has the A89 code (Reduced-Friction) on the data card, as this can influence specific fluid choices, though both the Signature Series and OE Fuel-Efficient AMSOIL transmission fluids are compatible with these requirements.
Maintaining Performance with Premium Fluids
Why settle for standard fluids when you can upgrade to the best? The synthetic motor oils recommended for this vehicle, such as the 5W-40 FS and 0W-40 FS, are designed to blow the doors off the highest industry standards. They provide exceptional protection against wear, even in the most severe driving conditions. Whether you are navigating the winding roads of a canyon, enduring a long commute in stop-and-go traffic, or simply extending the time between oil changes, these synthetic oils keep the engine clean and protected.
Transmission health is just as critical as engine health. Using a properly formulated transmission fluid for the CL550 can protect your vehicle from costly problems down the road. AMSOIL transmission fluids offer the best protection, remaining fluid in sub-zero temperatures while providing reserve protection during heavy use and abuse. This ensures the 722.9 transmission shifts smoothly and reduces the risk of overheating or sludge buildup that can occur with conventional fluids.
Beyond the engine and transmission, the braking and steering systems of the CL550 require specific attention. The recommended DOT 3 and DOT 4 synthetic brake fluid ensures excellent responsiveness for your ABS system and maintains a stable viscosity regardless of the heat generated during spirited driving. Similarly, the 100% synthetic multi-vehicle power steering fluid helps seals remain soft to prevent leaks and resists heat for a long fluid life, contributing to the smooth, quiet operation characteristic of this luxury coupe.
Vehicle Background
About the 2009 Mercedes-Benz CL550
The 2009 Mercedes-Benz CL550 represents the epitome of a grand touring coupe from the early 2010s. As part of the C216 generation, the CL-Class served as the luxury-oriented, two-door sibling to the S-Class sedan. The CL550 specifically was powered by the Mercedes-Benz M273 5.5-liter naturally aspirated V8 engine, which delivered a robust 382 horsepower. This engine was renowned for its smooth power delivery and reliability, making it a preferred choice for owners seeking effortless performance without the complexity of a turbocharger or supercharger.
Built on the W220 S-Class platform’s successor, the CL550 inherited the S-Class’s renowned ride quality and advanced safety technologies. The “CL” designation stood for “Coupé Luxus,” and the vehicle was celebrated for its spacious interior, high-quality leather upholstery, and cutting-edge electronics for its time. It offered a comfortable and secluded ride for two occupants, making it a favorite for highway cruisers who appreciated the blend of luxury and sportiness. The vehicle’s design, with its distinctive sloping roofline and elegant proportions, positioned it as a premium competitor to the BMW 6 Series, offering a unique combination of style and engineering prowess that continues to appeal to enthusiasts today.
Additional Protection and Maintenance
For vehicle owners who plan to store their CL550 during colder months or during periods of non-use, AMSOIL offers specialized products to ensure the engine remains protected from corrosion and fuel degradation. The AMSOIL Gasoline Stabilizer can help keep fuel fresh for up to 12 months, preventing varnish and gum buildup. For long-term storage, the Engine Fogging Oil provides a highly effective rust preventive designed to protect internal engine components.
Fuel system health is another critical aspect of maintaining peak performance. The AMSOIL P.i. Performance Improver gasoline additive can restore up to 14% horsepower and clean GDI fuel injectors back to 100% flow rate, helping to reduce the need for higher-octane fuel and improving overall fuel economy. Additionally, the Upper Cylinder Lubricant Corrosion Inhibitor offers further protection for the fuel system and upper cylinders.
To keep your CL550 looking as pristine as it drives, a variety of detailing products are available. The AMSOIL Heavy-Duty Degreaser is professional-strength and effective at removing the toughest grease and grime from engine surfaces. For exterior maintenance, the Exterior Ceramic Spray provides easy application and rapid water shedding, while the Miracle Wash Waterless Wash and Wax Spray leaves a fantastic shine and protects against UV rays. Whether you are cleaning brake parts, glass, or applying a protective layer to the body, these products are formulated to perform efficiently and leave no residue.
By selecting the right AMSOIL products, you ensure that your 2009 Mercedes-Benz CL550 receives the comprehensive care it deserves. From the engine oil and filters to the transmission fluid and brake fluid, every component benefits from the superior technology and rigorous testing that defines the AMSOIL brand. This commitment to quality translates to a vehicle that runs smoother, lasts longer, and delivers the performance you expect from a German engineering masterpiece.
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