Ensuring your 2012 Mercedes-Benz CLS63 AMG receives the proper lubrication is critical for maintaining the performance of its high-output 5.5L twin-turbo V8 engine. This vehicle places unique demands on its fluids due to the extreme temperatures generated by the turbochargers and the precision tolerances of its high-performance components. Using synthetic lubricants designed specifically for European vehicles can help mitigate wear, control heat, and ensure reliable operation across all driving conditions.
Recommended AMSOIL Products
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – A premium synthetic designed for the unique demands of European gasoline, diesel, and hybrid vehicles, featuring a precise blend of base oils and additives.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – An excellent alternative viscosity option for all temperatures, offering the same European-specific protection and synthetic durability.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Engineered to withstand the rigors of heavy towing and elevated temperatures while remaining fluid in sub-zero conditions.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A cost-effective option that provides robust protection against wear for the 7-speed automatic transmission.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A unique poly-organic acid (OAT) formulation that protects all cooling system metals, gaskets, and hoses with a long service life.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – A concentrated formula offering protection up to 150,000 miles or 5 years in passenger cars, greatly surpassing standards for corrosion and erosion.
- 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.
Protecting the High-Performance V8 Engine
The 2012 CLS63 AMG is powered by a formidable 5.5-liter M157 bi-turbo V8 engine. This powerplant operates under significant stress, generating immense heat that standard mineral oils simply cannot handle over time. To protect this engine, AMSOIL recommends filling it with 8.5 quarts of motor oil when including a filter change. It is crucial to refill to the correct level and verify the oil quantity after the engine has been serviced, as an accurate level is vital for the lubrication of the turbocharger bearings and the rest of the valvetrain.
For oil changes, you have the flexibility to choose between two high-performance synthetic grades depending on your local climate and driving style. The AMSOIL 5W-40 FS is an ideal year-round choice for most conditions. Alternatively, for maximum flow during cold starts, the AMSOIL 0W-40 FS offers superior pumpability while maintaining a robust protection film at operating temperature. Both oils feature formulations specifically tailored for European vehicles, ensuring they meet the strict requirements of the M157 engine. Proper torque settings are also essential during service; the M14 drain plug bolt requires 22 ft/lbs, while the M12 plug requires 14.7 ft/lbs.
Transmission Fluid for the 7-Speed Automatic
The CLS63 AMG relies on a sophisticated 7-speed automatic transmission (models 722.907 and 722.930) to manage the engine’s massive torque output. Keeping this transmission in peak condition requires a fluid that can handle high shear forces and thermal loads without breaking down. AMSOIL offers two primary options for this application. The AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is designed to withstand the rigors of heavy use and extreme temperatures.
The specific capacity for the transmission depends on the model and whether it features the reduced-friction code (A89). For a total fill, the 722.907 model requires 9.5 quarts, while the 722.930 model requires 7.5 quarts. If you prefer a highly capable alternative, the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid provides excellent protection against wear and is suitable for these applications. Using a high-quality synthetic transmission fluid ensures that the transmission shifts smoothly and remains protected against sludge and temperature-related failures.
Cooling System and Brake Fluid
Proper cooling is essential for any high-performance vehicle, and the CLS63 AMG’s cooling system requires precise maintenance. The coolant capacity varies slightly depending on the presence of an auxiliary radiator, ranging from 13.6 to 14.8 quarts. AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free formula that protects all cooling system components, including gaskets and hoses. For those who prefer a concentrated coolant that requires mixing with distilled water, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant is an excellent choice, offering superior corrosion protection and extended service intervals.
Braking performance is equally critical for a vehicle of this caliber. The CLS63 AMG is equipped with high-performance braking systems that can benefit from a fluid that resists boiling under heavy track or spirited street driving. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is compatible with systems requiring DOT 4 specifications, such as those labeled HBH. It provides a stable viscosity across a wide temperature range and ensures responsive pedal feel, which is vital for safe stopping power.
Vitality for the Fuel System and Long-Term Storage
To maximize the efficiency of the direct injection and port injection systems in the M157 engine, keeping the fuel system clean is paramount. The AMSOIL P.i.® Performance Improver Gasoline Additive works to restore up to 14% horsepower and cleans GDI fuel injectors, helping to maintain optimal fuel flow and economy. For vehicle owners who do not drive their CLS63 every day, storing the vehicle properly is important to prevent fuel degradation and internal corrosion. The AMSOIL Gasoline Stabilizer keeps fuel fresh for up to 12 months, protecting against varnish and gum buildup. Additionally, the AMSOIL Engine Fogging Oil can be used to coat internal engine components during long periods of inactivity, preventing rust and ensuring the engine is ready for immediate action when needed.
About the Vehicle: The 2012 Mercedes-Benz CLS63 AMG
The 2012 Mercedes-Benz CLS63 AMG represents a fascinating chapter in automotive history, blending the elegance of a luxury shooting brake with the raw power of a high-performance sports sedan. Based on the W212 platform, the CLS series is distinct for its four-door coupe design, offering a sleek, sloping roofline that sets it apart from traditional luxury sedans. The 2012 model year was significant as it introduced the highly anticipated 5.5-liter M157 V8 engine, replacing the previous naturally aspirated V8s with a twin-turbocharged powerhouse.
This engine code 157.981 variant delivers an impressive output, characterized by instant torque and a high-revving nature that enthusiasts adore. The CLS63 AMG was marketed as a grand tourer capable of blistering acceleration without sacrificing the daily usability expected of a German luxury vehicle. It combines a sophisticated multi-link suspension with the aggressive stance and aerodynamic efficiency of the AMG line. The interior typically features high-quality leather, advanced infotainment systems, and driver-focused instrumentation, all designed to provide a comfortable yet commanding driving environment. Owners of this model often appreciate its versatility; it serves equally well as a comfortable cruiser on long highway jaunts and as a thrilling track toy during spirited driving. Its reputation for performance has cemented its status as a favorite among those who desire a unique blend of style and substance in the luxury segment.