The 2004 Mercedes-Benz CL500 is a sophisticated luxury coupe powered by a 5.0L V8 engine. To maintain the performance, longevity, and driving dynamics that owners expect from this German engineering marvel, using fluids designed specifically for high-demand European engines is essential. Factory fill specifications can be limiting, but AMSOIL synthetic lubricants are formulated to exceed OEM standards, offering superior protection against wear, thermal breakdown, and contamination.
For this vehicle, the cooling system capacity is 12.2 quarts, while the engine oil capacity stands at 8.5 quarts with filter. When maintaining a 7-speed automatic transmission (722.9), a total fill requires 9.5 quarts. Ensuring these reservoirs are filled with high-performance synthetic fluids rather than conventional mineral oils can significantly reduce internal friction and operating temperatures, leading to smoother shifts and improved fuel economy over the life of the vehicle.
Recommended AMSOIL Products
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – A specialized formula designed for the precise tolerances of gasoline, diesel, and hybrid European vehicles, featuring a blend that supports extended drain intervals and extreme protection.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – An excellent alternative viscosity choice for the 5.0L V8, ensuring optimal flow during cold starts while maintaining film strength at high operating temperatures.
- AMSOIL Oil Filter – Engineered to provide 99% efficiency at 20 microns, this filter handles higher contaminant loads and reduces flow restriction better than standard OEM filters to keep the engine lubricated.
- WIX Oil Filter – A premium aftermarket alternative featuring advanced filtration media that offers improvements over original equipment manufacturer branded filters for this specific engine application.
- MANN-FILTERS Oil Filter – A high-quality OEM-recognized filtration solution that ensures clean oil circulation for the 2004 CL500 engine.
- MANN-FILTERS Air Filters – Provides precise air filtration to ensure the engine breathes freely, protecting internal components from abrasive dust and particulates.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A phosphate-, nitrate-, and silicate-free ethylene glycol formulation that protects all cooling system metals and is compatible with all other antifreeze colors.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated, high-purity option that offers exceptional protection up to 150,000 miles and is safe for all metals and rubber components in the cooling system.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Specifically formulated for the 722.9 transmission, this fluid withstands heavy towing, elevated temperatures, and challenging terrain while maintaining fluidity in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – An optimal choice for protecting the transmission against wear and sludge while enhancing overall fuel efficiency in the 2004 CL500.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent responsiveness for ABS and traction-control systems with a stable viscosity across a wide temperature range.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Formulated to reduce friction and keep seals soft to prevent leaks, offering strong anti-wear protection for quiet operation.
- AMSOIL P.i.® Performance Improver Gasoline Additive – A potent injector cleaner that restores up to 14% horsepower and improves fuel economy, ideal for maintaining the efficiency of the 5.0L V8.
- AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor – Lubricates the fuel system and upper cylinders to reduce wear and corrosion within the intake valves and combustion chamber.
- AMSOIL Synthetic Multi-Purpose Grease – A high-performance grease suitable for chassis and suspension points, offering excellent load-carrying capabilities and resistance to washout.
- AMSOIL Brake and Parts Cleaner – Quickly removes oil, grease, and brake fluid from components without leaving residue, helping eliminate brake squeal during maintenance.
Maintaining the cooling system is equally critical for the CL500, which requires a specific capacity of 12.2 quarts. Using an ethylene glycol-based coolant like the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant ensures that the aluminum components of the engine and radiator are protected from corrosion without the use of silicates or borates that can cause buildup. For those who prefer a concentrated solution, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant offers a versatile option that provides protection for up to 150,000 miles and is compatible with all other antifreeze and coolant colors in the system.
Transmission and Fluid System Care
The automatic transmission in the 2004 CL500 is a precision component that requires fluid meeting specific frictional characteristics. Whether your vehicle has the reduced-friction code A89 or not, the transmission total fill capacity is 9.5 quarts. Switching to AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid ensures that the transmission remains fluid in sub-zero temperatures while providing reserve protection during heavy use. The AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is also a robust choice for protecting against wear and maintaining performance under the unique demands of the 722.9 gearbox.
Brake and steering systems also benefit from a shift to synthetic lubricants. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is designed for Mercedes-Benz applications, ensuring excellent responsiveness for ABS and traction control systems. Similarly, the AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid reduces friction and prevents leaks by keeping seals soft, while its strong anti-wear protection ensures quiet operation and long fluid life.
Performance Additives and Maintenance
To keep the engine running at peak efficiency, the AMSOIL P.i.® Performance Improver Gasoline Additive is a recommended addition to the fuel tank. This formula restores injectors to 100% flow rate after just one tank, helping to improve fuel economy and reduce the need for higher-octane fuel. For vehicles that see less frequent use, the AMSOIL Engine Fogging Oil provides a highly effective rust preventive that protects internal engine components during long periods of inactivity. Additionally, the AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor helps lubricate the fuel system and upper cylinders, adding a layer of protection against corrosion and wear.
General maintenance tasks are also simplified with AMSOIL’s range of car care products. The AMSOIL Brake and Parts Cleaner is essential for cleaning brake components without leaving residue, while the AMSOIL Synthetic Multi-Purpose Grease offers high-load protection for chassis points. For cleaning and detailing, the AMSOIL Miracle Wash Waterless Wash and Wax Spray provides a fantastic shine with a tough protective finish, and the AMSOIL Engine Degreaser removes the toughest grease and grime from engine surfaces with a professional-strength formula.
About the Vehicle
The 2004 Mercedes-Benz CL500 represents the pinnacle of grand touring luxury, sitting in the CL-Class lineup as the coupé variant of the S-Class sedan. Introduced in the early 2000s, this model is powered by the robust M113 5.0L V8 engine, known for its smooth power delivery and exceptional durability. The CL-Class was designed for high-speed cruising, offering a blend of sporty handling and unparalleled comfort that made it a favorite among owners who appreciated the prestige of the brand and the freedom of open-road driving. With its sleek, aerodynamic body and spacious interior, the CL500 served as a halo vehicle for the marque, showcasing Mercedes-Benz’s commitment to engineering excellence. The car’s 7-speed automatic transmission and advanced suspension systems allowed for a ride that was both composed and agile, making it a capable performer on twisty backroads as well as on the Autobahn. Owners often cite the CL500 as one of the most satisfying luxury cars of its era, combining raw V8 power with the sophisticated technology and build quality that German automotive engineering is famous for.