Ensuring your 2012 Mercedes-Benz CL550 receives the proper lubrication is critical for maintaining the performance of its 4.7L V8 engine, code 278.920 7 Turbo. This luxury coupe combines high-end engineering with demanding driving dynamics, requiring fluids that can withstand extreme temperatures, high RPMs, and turbocharger stress. Using the correct synthetic lubricants not only protects internal components from wear but also helps maintain fuel efficiency and extends the service intervals between maintenance tasks.
Recommended AMSOIL Products
Below are the primary AMSOIL lubricants and filters specifically recommended for the 2012 Mercedes-Benz CL550 to ensure optimal engine protection and performance.
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – This oil is specifically designed for the unique demands of European vehicles, offering a precise blend of synthetic base oils and premium additives for superior protection.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – An excellent alternative viscosity option for year-round use, providing exceptional cold-weather starting and high-temperature stability for your CL550.
- WIX Oil Filter – Features premium media that offers improvements over original equipment manufacturer-branded filters to trap contaminants and ensure clean oil circulation.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands the rigors of heavy towing and elevated temperatures while maintaining fluidity in sub-zero conditions for the 7-speed transmission.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A cost-effective OE specification fluid that provides protection against wear and ensures smooth shifting in the 722.9 transmission.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Provides excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range, meeting Mercedes-Benz requirements.
The 2012 CL550 relies on a 4.7-liter V8 biturbo engine that delivers significant power and torque. To keep this powerplant running smoothly, it requires 9.0 quarts of oil with a WIX Oil Filter replacement. The engine oil viscosity can be either 0W-30, 0W-40 in all temperatures, or 5W-30 and 5W-40 for temperatures above -25°C. Proper lubrication is essential because the high compression and turbocharging create intense heat, which can degrade standard mineral oils quickly. AMSOIL 5W-40 FS and AMSOIL 0W-40 FS are engineered to resist thermal breakdown and deposit formation, ensuring the engine stays clean and protected under the most severe driving conditions.
Transmission and Cooling System Care
The automatic transmission in this model is a 7-speed 722.9 unit. Depending on whether the vehicle has the “Reduced Friction” code (A89) on the data card, the total fill capacity is 10.2 quarts. For the transmission fluid, AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is a high-performance option, while the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid provides cost-effective protection. Both options help prevent sludge buildup and protect against wear, ensuring the transmission shifts smoothly and extends its service life.
Cooling is equally vital for the CL550’s longevity. The cooling system requires 14.5 quarts of antifreeze. You can choose between AMSOIL Passenger Car & Light Truck Antifreeze & Coolant, which is a 50/50 pre-mix formulation ready to use, or the concentrated AMSOIL Propylene Glycol Antifreeze and Engine Coolant. Both products offer protection for up to 150,000 miles or 5 years and are phosphate, nitrite, and silicate-free, making them safe for all cooling system metals, gaskets, and hoses. This level of protection prevents corrosion and overheating, which are common concerns for high-performance vehicles operating in extreme climates.
Essential Brake and Power Steering Fluids
While often overlooked, AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid and AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid play a critical role in the safety and handling of the Mercedes-Benz CL550. The vehicle recommends a DOT 4 plus fluid, specifically products approved on Mercedes-Benz Sheet 331.0. AMSOIL’s DOT 3 and DOT 4 100% Synthetic Brake Fluid is an ideal choice, offering stable viscosity over a wide temperature range and excellent responsiveness for ABS and traction control systems. This ensures consistent braking performance whether you are driving on a cold winter morning or pushing the car on a hot track day.
For the power steering system, AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid is recommended. Formulated for quiet operation, this fluid reduces friction and helps seals remain soft to prevent leaks. It resists heat, which can cause seal hardening and fluid degradation, ensuring long fluid life and strong anti-wear protection. By using this synthetic fluid, you help maintain the precise steering feel and reliability expected from a premium German coupe.
Additional Protection and Maintenance
Beyond the essential fluids, maintaining the 2012 CL550 involves using fuel additives to keep the fuel system clean. The engine utilizes Gasoline Direct Injection (GDI) technology, which can be prone to carbon buildup on intake valves. AMSOIL P.i.® Performance Improver Gasoline Additive helps restore up to 14% horsepower and brings fuel injectors back to 100% flow rate after just one tank of fuel. It also reduces the need for higher-octane fuel and helps prevent pre-ignition knock.
For seasonal storage, it is advisable to use AMSOIL Gasoline Stabilizer to keep fuel fresh for up to 12 months, protecting against varnish and gum buildup. Additionally, AMSOIL Engine Fogging Oil can be used to protect internal engine components during long periods of inactivity. These storage products ensure that when the vehicle is taken out of storage, it starts immediately without internal rust or fuel system issues. For exterior care, AMSOIL Miracle Wash Waterless Wash and Wax Spray provides a protective finish that repels dust and light dirt while protecting against UV rays without the need for soap and water.
Vehicle Background
The 2012 Mercedes-Benz CL550 is a grand tourer that represents the pinnacle of luxury and performance engineering. As part of the W216 generation, it serves as the coupe variant of the S-Class, sharing its platform and engineering philosophy but styled with a sleeker, more aggressive silhouette. The CL550 is powered by the M278 4.7-liter V8 twin-turbocharged engine, a unit that was a significant technological leap for Mercedes-Benz at the time, offering the power of a V8 with the efficiency of a V6. This engine is renowned for its smooth power delivery and impressive torque, making the CL550 a capable performer on both winding mountain roads and long highway cruises.
Owners of the CL550 often appreciate its blend of opulence and driving dynamics. The interior is crafted with high-quality materials, featuring advanced technology for its era, including sophisticated driver assistance systems and a premium audio setup. The vehicle’s air suspension and all-wheel drive system (when equipped) provide a comfortable ride quality that absorbs road imperfections effortlessly, while the chassis tuning ensures responsive handling and stability. The CL550 was designed to be a comfortable cruiser capable of covering vast distances at high speeds with ease, yet it retains the agility required for spirited driving. Its reputation as a reliable and high-performance luxury coupe continues to attract enthusiasts who value the craftsmanship and engineering excellence associated with the Mercedes-Benz brand.