The 2008 Mercedes-Benz CL600 represents the pinnacle of German luxury engineering, featuring a powerful 5.5L 12-cylinder twin-turbo V8 engine. This high-performance Grand Coupe requires precise maintenance to sustain its power and longevity. Because this engine is designed to operate under extreme temperatures and high RPMs, standard mineral oils often fail to provide the necessary protection. Maintaining the correct fluid levels and using high-quality synthetic lubricants is essential for managing the thermal stress placed on the engine and transmission components. This includes selecting the right AMSOIL 5W-40 FS 100% Synthetic European Motor Oil or the cold-climate alternative to ensure optimal performance.
Recommended AMSOIL Products
For optimal performance, the AMSOIL selection includes two primary synthetic European motor oil options designed specifically for this vehicle’s twin-turbo engine. These fluids offer superior thermal stability and engine cleanliness compared to conventional alternatives.
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – An excellent choice for year-round use, featuring a precise blend of synthetic base oils tailored for the unique demands of European gasoline and diesel vehicles.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – Ideal for colder climates or drivers seeking maximum cold-flow protection, this synthetic European formula ensures rapid lubrication at startup while maintaining viscosity at high operating temperatures.
The engine requires 9.5 quarts of oil when including the filter. For those models equipped with an oil cooler, additional oil may be necessary if the cooler is drained during service. It is crucial to wait approximately five minutes after refilling or turning the engine off before checking the oil level to ensure an accurate reading. The oil drain plug should be torqued to 22 ft/lbs during reinstallation.
Engine and Cooling System Protection
Beyond the engine oil, the cooling system is critical for a vehicle with a twin-turbo V8 engine. The 2008 CL600’s cooling system holds a capacity of 15.9 quarts. Maintaining the correct antifreeze mixture protects against corrosion, erosion, and temperature extremes. AMSOIL offers two distinct options to meet the needs of different climates and maintenance preferences.
AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a ready-to-use 50/50 pre-mix formulation. This unique poly-organic acid (OAT) chemistry protects all cooling system metals, gaskets, and hoses for up to 150,000 miles or five years. It is phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free, making it compatible with other coolant colors.
Alternatively, AMSOIL Propylene Glycol Antifreeze and Engine Coolant provides a concentrated solution that requires mixing with distilled or high-quality water. This propylene glycol-based formula offers extended protection, surpassing standards for metallic corrosion and erosion. It is designed for long service intervals and is compatible with all other antifreeze and coolant colors.
Transmission and Power Steering Fluids
The automatic transmission in this model, specifically the 5-speed 722.6, is subjected to significant heat and load, particularly given the vehicle’s torque output. Proper fluid management is vital to prevent sludge, wear, and temperature-related failures. The total fill capacity for the 5-speed 722.6 transmission is 8.1 quarts.
AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is engineered to withstand the rigors of heavy towing, elevated temperatures, and challenging terrain. It remains fluid in sub-zero temperatures and provides reserve protection during heavy use. For those seeking an OE-matching solution, AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid offers comparable protection while adhering to original equipment manufacturer specifications.
The power steering system also benefits from premium lubrication. AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid reduces friction and helps seals remain soft to prevent leaks. It resists heat for long fluid life, provides strong anti-wear protection, and is formulated for quiet operation.
Brake Fluids and Additional Maintenance
The braking system on the 2008 Mercedes-Benz CL600 requires fluid that meets high performance standards. The manufacturer recommends using DOT 4 plus fluid, meeting MB Sheet 331.0 specifications. AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid delivers excellent ABS and traction-control responsiveness. It maintains stable viscosity over a wide temperature range, ensuring consistent braking performance in all conditions.
For seasonal storage, AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, protecting against varnish and gum buildup. Additionally, AMSOIL Engine Fogging Oil provides a highly-effective rust preventive for protecting internal engine components during long periods of inactivity.
Performance and cleaning are also essential. AMSOIL P.i. Performance Improver Gasoline Additive restores up to 14% horsepower and cleans GDI fuel injectors. AMSOIL Upper Cylinder Lubricant Corrosion Inhibitor further lubricates the fuel system and upper cylinders. For exterior care, AMSOIL Brake and Parts Cleaner removes contaminants without residue, while AMSOIL Miracle Wash Waterless Wash and Wax Spray offers a fantastic shine and tough protection.
For heavy-duty cleaning and protection, AMSOIL Engine Degreaser tackles the toughest grease and grime, while AMSOIL Heavy-Duty Metal Protector guards against salt and corrosion. For specific applications, AMSOIL MP Metal Protector cuts through rust and frees frozen components, and AMSOIL Silicone Spray protects rubber surfaces from drying and cracking.
Finally, ensure the fuel system runs smoothly with AMSOIL Power Foam® Carburetor and Induction-System Cleaner, and keep windows streak-free with AMSOIL Glass Cleaner. The lineup is rounded out by AMSOIL High-Foam Car Shampoo, AMSOIL Exterior Ceramic Spray, AMSOIL Interior Detailer – Light Lemon, and AMSOIL Interior Detailer – Scent Free. For off-road or dusty conditions, AMSOIL Mudslinger® Mud and Dirt Repellent provides a protective layer against accumulation.
About the Vehicle
The 2008 Mercedes-Benz CL600 is a distinguished member of the CL-Class lineup, a vehicle series known for blending the comfort of a luxury cruiser with the dynamic capabilities of a sports car. Based on the S-Class platform, this model is powered by the legendary M275 engine, a 5.5-liter V8 featuring twin turbochargers. This powertrain delivers substantial horsepower and torque, making the CL600 one of the most powerful coupes of its era.
Owners of this vehicle often appreciate its grand touring capabilities, which allow for effortless long-distance travel without sacrificing performance. The interior is renowned for its high-quality materials, advanced technology, and serene cabin environment, offering a driving experience that prioritizes both comfort and control. As a flagship coupe from Mercedes-Benz, the CL600 occupies a unique market position, appealing to enthusiasts who demand high performance but refuse to compromise on luxury and build quality. Its robust construction and sophisticated engineering make it a standout choice for those seeking a premium driving experience on the open road.