The 2007 Mercedes-Benz ML350 with its 3.5L V6 engine is a capable luxury SUV that demands high-performance maintenance to ensure long-term reliability. Proper lubrication is critical for this vehicle, as its European engineering standards require oils and fluids that meet specific viscosity and additive requirements. Using the correct synthetic fluids helps prevent wear, manage operating temperatures, and maintain the performance of complex systems like the automatic transmission and power steering.
Recommended AMSOIL Products
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – Designed for the unique demands of European gasoline, diesel, and hybrid vehicles, providing a precise blend of synthetic base oils and premium additives.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – An excellent alternative viscosity for extreme temperatures, featuring the specialized European formula for enhanced protection.
- AMSOIL Oil Filter – Provides 99% filtration efficiency at 20 microns with greater capacity for contaminants to help reduce engine wear.
- WIX Oil Filter – Features premium media that offers improvements over original equipment manufacturer-branded filters for reliable protection.
- MANN-FILTERS Oil Filter – Offers premium filtration media suitable for this Mercedes-Benz application.
- MANN-FILTERS Air Filters – Premium air filtration to ensure clean airflow for the engine and improve efficiency.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – A phosphate-, nitrate-, and silicate-free formula providing protection for up to 150,000 miles or 5 years.
- AMSOIL Propylene Glycol Antifreeze and Engine Coolant – Concentrated coolant that greatly surpasses standards for metallic corrosion and erosion protection.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands 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 protects against wear and promotes smooth shifts.
- AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Suitable for transfer case applications, offering resistance to heavy loads and heat.
- AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid – Guards against leaks and resists harmful sludge in transfer case and transmission systems.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Offers excellent ABS and traction-control responsiveness with a stable viscosity over a wide temperature range.
- AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid – Reduces friction and helps seals remain soft to prevent leaks in both belt-driven and electro-hydraulic systems.
Engine Oil and Filter Specifications
The heart of the 2007 ML350 is the 3.5L V6 engine (Engine Code 3498cc W). To maintain optimal performance, this engine requires a motor oil that can handle the unique stress levels of European vehicles. AMSOIL recommends either the 5W-40 FS or the 0W-40 FS 100% Synthetic European Motor Oil. These oils are formulated with a precise blend of synthetic base oils and premium additives specifically designed to meet the rigorous standards of Mercedes-Benz engines. The 0W-40 variant is ideal for extreme cold weather, while the 5W-40 offers excellent protection for a wide range of temperatures.
The total oil capacity for the 2007 ML350 is 8.5 quarts when the filter is replaced. It is important to note that after refilling, you should check the oil level to ensure it is within the correct operating range. When performing the oil change, ensure the oil drain plug is torqued to 25 ft/lbs to prevent leaks or damage to the pan. For filtration, the AMSOIL Oil Filter (EA15K39-EA) provides superior filtering efficiency compared to many competitors, capturing wear-causing contaminants to extend engine life. Alternatively, the WIX Oil Filter (57078-EA) and MANN-FILTERS Oil Filter (HU7185X-EA) offer high-quality protection that meets or exceeds OEM specifications.
Transmission and Transfer Case Fluids
The automatic transmission in the 2007 ML350, specifically the 7-speed unit, is a critical component that requires a fluid capable of withstanding the demands of a luxury SUV. There are variations based on the presence of the A89 code (Reduced-Friction) on the datacard. For units with the A89 code, or generally for optimal performance, the AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is highly recommended. This fluid remains fluid in sub-zero temperatures and withstands the rigors of heavy towing and elevated temperatures.
If the vehicle does not have the A89 code, the total fill capacity for the 7-speed transmission is 9.5 quarts. The AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is a reliable choice for standard operation. For the transfer case, which is part of the 4Matic all-wheel-drive system, fluid selection depends on whether the unit is a single-speed or double-speed configuration. The double-speed transfer case holds 3.2 pints, while the single-speed unit requires 1.1 pints. In these transfer case applications, the AMSOIL Signature Series Multi-Vehicle 100% Synthetic Automatic Transmission Fluid or the AMSOIL OE Multi-Vehicle 100% Synthetic Automatic Transmission Fluid provides excellent resistance to sludge and promotes smooth, shudder-free operation.
Coolant and Brake Systems
Maintaining the cooling system is vital for the longevity of the V6 engine. The 2007 ML350 requires 10 quarts of coolant. Owners can choose between the AMSOIL Passenger Car & Light Truck Antifreeze & Coolant, which is an ethylene glycol 50/50 pre-mix ready to use and compatible with all cooling system metals, or the AMSOIL Propylene Glycol Antifreeze and Engine Coolant, which is a concentrated option for those who prefer to mix with distilled water. Both options offer protection against corrosion for up to 150,000 miles or 5 years and are free of phosphates, nitrates, and silicates.
For the braking system, the ML350 requires a DOT 3 and DOT 4 compatible fluid. The AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid is an excellent choice, providing stable viscosity over a wide temperature range and ensuring excellent responsiveness for ABS and traction control systems.
Steering and Seasonal Maintenance
The power steering system in this vehicle can be either belt-driven or electro-hydraulic. For both types, the AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid is recommended. This fluid reduces friction, resists heat for long fluid life, and helps seals remain soft to prevent leaks, ensuring quiet and smooth operation.
For seasonal storage, the AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, protecting against varnish and gum buildup. Additionally, the AMSOIL Engine Fogging Oil is ideal for protecting internal engine components during long periods of inactivity.
About the Vehicle
The 2007 Mercedes-Benz ML350 represents the second generation of the ML-Class, often referred to as the W164 platform. Introduced to replace the W163, this generation marked a significant shift in Mercedes-Benz design philosophy, offering a more aerodynamic and sophisticated silhouette that bridged the gap between a rugged off-roader and a comfortable luxury SUV. The ML350 is powered by the M272 engine, a 3.5-liter V6 that delivers a smooth and robust 268 horsepower, providing ample power for highway merging, overtaking, and light towing tasks. This engine is renowned for its balance of performance and efficiency, making the ML350 a versatile choice for families and adventure enthusiasts alike.
The vehicle features the 7G-Tronic automatic transmission, a robust 7-speed unit that revolutionized shifting smoothness in the mid-2000s. It is available with the 4MATIC all-wheel-drive system, which provides superior traction in various weather conditions without the driver needing to worry about engaging four-wheel drive manually. The interior of the 2007 ML350 reflects the high standards of the era, with premium materials, advanced safety features, and a focus on driver comfort. Its market position was strong as a competitor to the BMW X5 and Land Rover LR3, offering a blend of German engineering, reliability, and practicality.
Despite its reputation for reliability, the ML350 can face specific issues as it ages, particularly with its engine and suspension systems. One common problem is the VANOS system, which manages the timing of the intake and exhaust valves. Oil degradation can lead to sludge buildup, causing the VANOS solenoids to stick, resulting in rough idling or loss of power. Using high-quality synthetic motor oil that resists oxidation and sludge formation is a proactive solution to keep the VANOS system functioning smoothly. Another area to monitor is the engine mounts. Over time, the hydraulic mounts can fail, leading to increased vibration and a rougher ride. While not a fluid issue per se, maintaining proper engine health with the correct lubricants can reduce the stress on these mounts and delay wear.
Owners of this vehicle may also experience issues with the transmission shudder or harsh shifting, especially as the fluid ages. The transmission fluid can lose its friction modifiers and protective properties, leading to wear on clutch plates and the torque converter. Regular changes with a high-performance synthetic transmission fluid can restore smooth shifting and prevent costly repairs. Additionally, the air conditioning system in the W164 ML-Class is known to occasionally suffer from compressor failures, often linked to contamination from internal wear. While a separate system, keeping the engine and cooling systems in peak condition ensures the air conditioning compressor is not overworked by a struggling engine, contributing to the overall longevity of the vehicle’s electrical and mechanical systems.
By adhering to a strict maintenance schedule using AMSOIL’s premium lubricants, owners can mitigate these common issues and keep their 2007 ML350 running smoothly for years to come. Whether navigating city streets or tackling a weekend trail, the right fluids make all the difference in protecting this sophisticated piece of automotive engineering.