Keeping your 2007 Mercedes-Benz CLS63 AMG running at its peak requires more than just regular maintenance; it demands fluids specifically engineered to handle the extreme stresses of a high-performance V8 engine. This vehicle features a powerful 6.3L naturally aspirated engine (Engine Code DOHC E) that operates at higher temperatures and pressures than standard commuter cars. Using the correct viscosity and formulation ensures that critical components like the camshafts, pistons, and timing chain remain protected, even under track or aggressive street driving conditions.
Recommended AMSOIL Products
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – Designed specifically for the unique demands of European gasoline and diesel vehicles, this oil offers a precise blend of synthetic base oils and premium additives to handle the high-temperature environment of the CLS63 AMG. It meets the capacity requirement of 9.3 quarts with filter.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – An excellent choice for extreme cold temperatures, this viscosity grade ensures immediate lubrication on startup while maintaining stability in the engine’s upper heat ranges. It provides superior protection for the high-revving 8-cylinder engine.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – This pre-mixed, ethylene glycol formulation protects the cooling system metals, gaskets, and hoses against corrosion. It is essential for the CLS63’s cooling capacity of 8.3 quarts, ensuring the engine stays within optimal operating temperatures.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – For those preferring a concentrated fluid, this option offers extended protection up to 150,000 miles or 5 years. It is phosphate-, nitrate-, and silicate-free, making it safe for all cooling system metals and hoses.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Built to withstand the rigors of the CLS63’s transmission, this fluid provides protection against wear and elevated temperatures. It remains fluid in sub-zero conditions and is ideal for the 7-speed automatic transmission which requires a total fill of 9 quarts.
- AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – A high-performance alternative designed to protect against wear and extend service intervals while maintaining the smooth shifting characteristics required by the vehicle’s factory transmission specs.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Essential for maintaining responsive braking, this fluid offers excellent ABS and traction-control performance. It provides stable viscosity across a wide temperature range, ensuring reliable stopping power in both summer heat and winter cold.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Formulated to reduce friction and keep seals soft to prevent leaks, this fluid offers strong anti-wear protection and excellent high-temperature performance for the vehicle’s hydraulic steering system.
Understanding the specific fluid requirements for your CLS63 AMG goes beyond simply filling a reservoir. The 6.3L V8 engine is a marvel of German engineering, but it is also a high-output powerplant that generates immense heat. The engine oil capacity is 9.3 quarts, and it is crucial to use a synthetic oil with the right viscosity to maintain a proper lubricating film on the bearings and camshafts. The AMSOIL 5W-40 FS and 0W-40 FS options are formulated to meet the strict specifications of European manufacturers, offering superior thermal stability compared to conventional blends.
Beyond the engine, the cooling system plays a vital role in the longevity of the vehicle. With a coolant capacity of 8.3 quarts, the system is substantial and requires a high-quality antifreeze that prevents boiling and freezing. The AMSOIL Passenger Car & Light Truck Antifreeze provides a 50/50 pre-mix solution that is free of harmful silicates and borates, which can be abrasive to aluminum components often found in European cooling systems. For those who prefer a concentrated formulation to be mixed with distilled water, the Propylene Glycol Antifreeze option offers robust corrosion protection and extended service life.
The transmission in this vehicle, specifically the 7-speed automatic with code 722.9, requires precise fluid dynamics to shift smoothly under the load of a 500+ horsepower engine. The Signature Series Fuel-Efficient and OE Fuel-Efficient transmission fluid options are designed to handle the thermal stress of high-performance driving. They resist oxidation and shear down, ensuring that the transmission continues to shift crisply even after thousands of miles of service. Whether the vehicle has the reduced-friction code A89 or not, these fluids provide the necessary lubrication and friction modifiers to protect the clutch plates and gears.
Safety systems are just as critical as engine performance. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid in a high-performance vehicle like the CLS63 AMG must have a high boiling point to prevent vapor lock during hard braking. This fluid offers superior resistance to water absorption compared to standard DOT 4, which helps maintain a high boiling point over time. This ensures that the braking system remains consistent and responsive, giving the driver confidence when pushing the vehicle to its limits.
About the Vehicle
The 2007 Mercedes-Benz CLS63 AMG represents a bold and innovative step in automotive design, effectively creating the “four-door coupe” segment. Based on the W219 platform, this model combines the sleek, sloping roofline of a coupe with the practicality of a sedan. It was the first production vehicle to pair a naturally aspirated V8 engine from the AMG division with this distinctive body style, setting a new standard for performance luxury vehicles.
At the heart of the CLS63 AMG lies the M156 6.3-liter V8 engine. This powerplant produces approximately 518 horsepower and 479 lb-ft of torque. Unlike turbocharged alternatives of the era, this engine relies on its massive displacement and aggressive camshafts to deliver power. The sound of the naturally aspirated V8, often described as a deep, guttural roar, is a significant part of the vehicle’s appeal. The powertrain is paired with a 7G-Tronic automatic transmission featuring paddle shifters, allowing drivers to manage the immense torque with precision. The rear-wheel-drive layout is further enhanced by an AMG Speedshift system and an active rear differential, which improves handling dynamics significantly.
Owners of the CLS63 AMG are often drawn to the vehicle because it offers a unique blend of exclusivity and daily usability. It is not just a showpiece; it is a genuine performance machine capable of accelerating from 0 to 60 mph in under 4.5 seconds. Despite its aggressive stance and high performance, it serves as a practical luxury sedan with ample rear-seat space, making it a favorite for enthusiasts who refuse to compromise on utility. The vehicle’s reputation for high performance has cemented its place in Mercedes-Benz history as a landmark model that bridged the gap between sports cars and luxury sedans.
While the CLS63 AMG is a robust vehicle, it does have specific maintenance needs that are exacerbated by its high-performance nature. One common issue with the M156 engine is the development of oil consumption, particularly in higher mileage units. This can be attributed to the tight tolerances required for such a high-output engine and the thermal expansion of components. Using a high-quality synthetic oil like AMSOIL 5W-40 FS can help mitigate this issue by providing a stronger oil film that resists burn-off and reduces wear on piston rings. Regular oil changes are critical, as the engine operates at high temperatures that can break down conventional lubricants.
Another area of concern for these vehicles is the cooling system, which must manage the heat generated by the large V8. Over time, standard antifreeze can degrade, leading to corrosion or boiling issues, especially if the vehicle is driven aggressively. The AMSOIL antifreeze and Propylene Glycol Antifreeze solutions are designed to prevent these problems, extending the life of the radiator, water pump, and hoses. Additionally, the brake fluid can absorb moisture over time, leading to a spongy brake pedal and reduced performance. Upgrading to synthetic brake fluid helps maintain the high boiling point required for track or spirited driving, ensuring the braking system remains responsive.
Finally, the automatic transmission in the CLS63 AMG requires fluid that can handle the specific friction characteristics of the 722.9 gearbox. Standard factory fluids may break down under the heat of aggressive driving, leading to hard shifts or premature wear. AMSOIL Signature Series and OE Fuel-Efficient transmission fluids provide better thermal stability and lubrication, ensuring smooth operation and extending the life of the transmission components. By addressing these common points of failure with premium lubricants, owners can keep their 2007 CLS63 AMG running as smoothly as the day it left the factory.