The 2007 Mercedes-Benz R500 is a premium crossover that combines the rugged capability of an SUV with the elegance of a luxury sedan. At the heart of this sophisticated vehicle lies the M273 5.0L V8 engine, a powerhouse designed for high performance and smooth power delivery. However, as vehicles age, the demands placed on their engine oils and fluids evolve. The precise synthetic formulations required by German engineering are not one-size-fits-all, and selecting the wrong viscosity or additive package can lead to premature wear, reduced fuel economy, or poor cold-start performance. Ensuring the correct lubrication is not just about following a manual; it is about maximizing the longevity and reliability of a complex powertrain that has seen decades of evolution.
Recommended AMSOIL Products
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – A premium formula specifically designed for the unique demands of European V8 engines, offering superior high-temperature stability and wear protection for the R500’s 5.0L powerplant.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – An ultra-flowing synthetic option that provides excellent cold-weather starting and rapid lubrication while maintaining critical film strength during high-RPM operation.
- AMSOIL Oil Filter – Engineered to capture 99% of harmful contaminants at 20 microns, this filter ensures the cleanest possible oil flow to protect vital engine components and reduce wear.
- WIX Oil Filter – A premium aftermarket option featuring media that offers improvements over original equipment manufacturer filters for optimal filtration efficiency and service life.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A phosphate-, nitrate-, and silicate-free extended-life coolant that protects the engine’s cooling system from corrosion and overheating for up to 150,000 miles.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Delivers exceptional protection against sludge and wear for the 722.9 transmission, ensuring smooth shifts and resistance to extreme temperatures.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Provides a stable viscosity across a wide temperature range and excellent responsiveness for ABS and traction control systems.
Understanding the specific lubrication needs of the 2007 R500 is crucial for maintaining its performance characteristics. The vehicle’s 5.0L V8 engine, with its 8-cylinder configuration, generates significant heat and requires oil that can maintain viscosity under stress. The recommended capacity for a 5.0L engine oil change, including the filter, is 9 quarts. It is essential to adhere to the proper torque specifications for the oil drain plug, which is set at 25 ft/lbs, to prevent leaks or damage to the threads. Furthermore, after the refill, owners should always check the oil level to ensure the correct amount has been added, as the engine’s internal tolerances are precise and sensitive to over or under-filling.
While the engine is the primary concern, the R500’s 7-speed automatic transmission (model 722.9) also requires specific attention. The fluid capacity for a total fill is 9.5 quarts. There are specific notes regarding the transmission fluid application depending on the data card code; for models with the A89 reduced-friction code, specific fluid properties are required, while models without this code or with code SL057 have their own distinct requirements. Using a fluid that matches these specifications ensures the transmission’s clutch packs and valves function correctly, preventing shudder, slipping, and premature wear. AMSOIL offers both Signature Series and OE Fuel-Efficient options tailored to these needs, providing a clear choice for enthusiasts looking to extend transmission life.
Thermal management is another critical aspect of the R500’s maintenance regimen. With a cooling system capacity of 11.1 quarts, the vehicle relies heavily on the integrity of its antifreeze and coolant mixture. The recommended AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a poly-organic acid (OAT) formulation that is phosphate-, nitrate-, nitrite-, silicate-, borate-, and amine-free. This unique chemistry is designed to be compatible with all other antifreeze colors and protects all cooling system metals, gaskets, and hoses. For owners who prefer to mix their own, the concentrated Propylene Glycol Antifreeze and Engine Coolant offers an alternative that greatly surpasses standards for metallic corrosion and erosion, with protection extending up to 150,000 miles or 5 years. Both options ensure the engine operates within its ideal temperature range, protecting against overheating in summer and freezing in winter.
Fluid System and Maintenance Details
Moving beyond the engine and transmission, the R500 requires specialized attention for its braking and steering systems. The brake fluid recommendation specifies the use of DOT 3 and DOT 4 products. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is formulated to provide excellent ABS and traction-control responsiveness while maintaining stable viscosity over a wide temperature range. This stability is vital for preventing brake fade and ensuring consistent pedal feel, which is essential for a heavy vehicle with significant performance capabilities.
Power steering is equally important for the R500, regardless of whether it utilizes a belt-driven power steering pump or an electro-hydraulic system. The AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid is designed to reduce friction, help seals remain soft to prevent leaks, and resist heat for long fluid life. It offers strong anti-wear protection and is formulated for quiet operation, which helps maintain the smooth and precise steering feel that owners expect from a Mercedes-Benz. Additionally, the vehicle’s transfer case, if applicable, requires 1.1 pints of lubricant with specific torque settings of 16 ft/lbs for both the drain and fill plugs. For the rear and front differentials, the capacity is 2.3 pints each. The AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid can serve as a versatile gear lubricant for these applications, providing robust protection against the rigors of towing and challenging terrain.
About the Vehicle
The 2007 Mercedes-Benz R-Class, specifically the R500 model, occupies a unique and somewhat misunderstood niche in the automotive landscape. Often referred to as a “Sport Activity Vehicle” (SAV) by the manufacturer, it blends the versatility of a crossover with the luxury and ride quality of a sedan. The R500 is powered by the M273 5.0L naturally aspirated V8 engine, a robust unit known for its smooth power delivery and distinctive exhaust note. This engine produces substantial horsepower and torque, allowing the heavy vehicle to accelerate with surprising vigor despite its substantial curb weight.
Owners of the R500 typically appreciate its versatile design, which offers seating for up to seven passengers without sacrificing the comfort of the front row. The cabin is generally quiet, featuring high-quality materials and advanced technology for its time, including the COMAND infotainment system. The driving character is a blend of luxury and utility; while it handles like a car more often than a truck, it possesses the cargo space and ground clearance to handle family hauling needs or light recreational towing. The vehicle was originally manufactured for markets demanding a premium alternative to standard SUVs, focusing on on-road performance rather than off-road capability.
Despite its engineering excellence, the R500 is not without its common issues that owners should be aware of as the vehicle ages. One of the most prevalent concerns involves the engine mounts, which can degrade over time, leading to excessive vibration and clunking noises, particularly when accelerating or shifting gears. Another frequent problem is related to the oil cooler seal or gasket failure, which can lead to oil leaks into the coolant system, causing contamination and potential overheating issues. Additionally, the engine’s variable camshaft timing system (VVT) components, specifically the solenoids and phasers, are known to fail or become sluggish, resulting in rough idling or check engine lights related to camshaft timing. A fourth common issue involves the air suspension compressor or leveling system, which can become unreliable as the system ages, leading to uneven ride heights or warnings in the instrument cluster.
Using high-quality synthetic lubricants like AMSOIL can significantly mitigate the wear associated with these aging components. The superior thermal stability and film strength of the 5W-40 FS or 0W-40 FS oils help maintain proper lubrication to the VVT system and engine bearings, even as clearances widen over time. Similarly, the AMSOIL Oil Filter helps maintain clean oil to reduce wear on these components. The synthetic brake fluid helps protect the hydraulic components of the suspension and braking systems from corrosion and moisture absorption, ensuring reliable operation. By adhering to a strict fluid maintenance schedule and using products designed to meet the stringent requirements of German engineering, R500 owners can extend the service life of their vehicle and address many of the common maintenance challenges associated with this unique luxury crossover.