Proper maintenance is the cornerstone of longevity for any luxury vehicle, and the 2009 Mercedes-Benz E350 is no exception. This mid-size luxury sedan, powered by a 3.5-liter naturally aspirated V6 engine, requires high-quality lubricants to manage the unique stresses of its precision engineering. Using the correct fluids ensures optimal performance in varying temperatures, extends service intervals, and protects critical components from wear and sludge buildup. For owners seeking to maintain the vehicle’s reputation for smooth driving and durability, selecting the right synthetic products is essential for keeping the engine, transmission, and cooling systems operating at their peak efficiency.
Recommended AMSOIL Products
- AMSOIL 5W-40 FS 100% Synthetic European Motor Oil – A specialized formulation designed for the precise demands of European gasoline, diesel, and hybrid engines, offering superior protection and cleanliness.
- AMSOIL 0W-40 FS 100% Synthetic European Motor Oil – An ideal choice for extreme cold climates, providing rapid oil flow during startup while maintaining high-temperature stability for extended durability.
- AMSOIL Oil Filter – Features premium media that filters 99 percent of wear-causing contaminants at 20 microns, offering greater capacity and lower restriction than standard filters to reduce engine wear.
- AMSOIL Passenger Car & Light Truck Antifreeze & Coolant – An ethylene glycol 50/50 pre-mix formulation that exceeds OEM requirements, protecting cooling system metals and hoses up to 150,000 miles or 5 years.
- AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid – Withstands heavy towing and elevated temperatures, remaining fluid in sub-zero conditions to ensure smooth shifting and transmission longevity.
- AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid – Delivers excellent ABS and traction-control responsiveness with a stable viscosity across a wide temperature range for consistent braking performance.
Engine performance relies heavily on the viscosity grade and the additive package within the motor oil. For the 2009 Mercedes Benz E350 with its 3.5L 6-cylinder engine, the recommended oil capacity is 8.5 quarts when performing a standard change including the AMSOIL Oil Filter. If the vehicle is equipped with an oil cooler, additional oil may be required if the cooler is drained during the service. Drivers should allow the engine to sit for approximately five minutes after refilling or shutting the engine off before checking the oil level to ensure an accurate reading. The engine oil drain plug requires a torque setting of 22 ft/lbs. Both the AMSOIL 5W-40 FS 100% Synthetic European Motor Oil and AMSOIL 0W-40 FS 100% Synthetic European Motor Oil viscosity options are suitable, allowing owners to choose based on their local climate conditions. The 0W-40 grade is particularly beneficial for regions with severe winters, as it flows more freely at startup to minimize wear, while the 5W-40 offers excellent protection for those operating in moderate to warmer climates or under high-load conditions.
Maintaining the cooling system is equally critical for this engine. The cooling system capacity is also listed at 8.5 quarts. AMSOIL offers two distinct options for this application. The AMSOIL Passenger Car & Light Truck Antifreeze & Coolant is a 50/50 pre-mix, meaning it is ready to use straight from the jug. It is an ethylene glycol-based formulation that is phosphate, nitrate, nitrite, silicate, borate, and amine-free, making it compatible with a wide variety of vehicle metals and components. Alternatively, the AMSOIL Propylene Glycol Antifreeze and Engine Coolant is a concentrated fluid that requires mixing with distilled or high-quality water. This concentrated option offers extended service intervals, protecting the engine up to 150,000 miles or 5 years, and in heavy-duty applications, it can last up to 1,000,000 miles or 8 years depending on the duty cycle. Both options provide robust protection against metallic corrosion and erosion, ensuring the engine stays within its optimal operating temperature range.
The automatic transmission in the 2009 E350 utilizes a 722.9 series transmission. Depending on the specific model year configuration and whether it includes the reduced-friction code (A89), the total fill capacity for a 7-speed 722.9 transmission is approximately 9.7 quarts, while the 5-speed 722.6 version holds about 8.6 quarts. Using a synthetic fluid designed for these transmissions is vital to prevent wear and maintain shift quality. The AMSOIL Signature Series Fuel-Efficient 100% Synthetic Automatic Transmission Fluid is engineered to withstand the rigors of heavy towing and challenging terrain, while also ensuring the fluid remains usable in sub-zero temperatures. For those seeking a cost-effective option that still delivers top-tier protection, the AMSOIL OE Fuel-Efficient 100% Synthetic Automatic Transmission Fluid provides excellent wear protection and is compatible with the vehicle’s transmission requirements.
Fluids for the steering and braking systems are often overlooked but are critical for safety and driver control. The 2009 E350 requires a AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid that meets or exceeds MB Sheet 331.0 specifications. AMSOIL’s 100% Synthetic Brake Fluid meets DOT 3 and DOT 4 standards, offering a stable viscosity that ensures the anti-lock braking system functions correctly even under extreme thermal loads. For the power steering system, which requires a fluid compatible with the PS031 specification, the AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid is an excellent choice. This synthetic fluid is formulated to resist heat, which helps seals remain soft to prevent leaks, while reducing friction for quieter operation. Its low-temperature performance ensures that steering is responsive even in freezing conditions.
Filters and Maintenance
In addition to fluid maintenance, filtration is key to preserving engine health. For the 2009 E350, the AMSOIL Oil Filter offers superior filtration efficiency. Owners can also opt for the WIX Oil Filter for premium media that improves over standard OEM filters. For air intake, the MANN-FILTERS Air Filters provide high-quality filtration to ensure clean airflow. For a complete oil service, the MANN-FILTERS Oil Filter is another excellent alternative to consider.
About the Vehicle
The 2009 Mercedes-Benz E350 represents a significant moment in the legacy of the E-Class sedan, belonging to the W211 generation which was produced from 2002 until 2009. This mid-size luxury sedan was widely celebrated for its balanced approach to performance, comfort, and practicality. Under the hood, the E350 features the M272 engine, a 3.5-liter V6 that produces around 268 horsepower. This powerplant was known for its smooth power delivery and refined character, making the vehicle an ideal choice for both daily commuting and long-distance touring.
As part of the “First” generation of the W211 facelift, the 2009 model year benefited from subtle but meaningful updates, including refined interior materials and improved suspension tuning. The E-Class lineup has always been a benchmark in the luxury segment, often serving as a standard for safety and engineering excellence. For owners in 2009, the E350 offered a sophisticated driving experience that combined German handling dynamics with the plush ride quality expected of a Mercedes-Benz. Its spacious trunk and rear-seat roominess made it a favorite for families and executives alike. The vehicle’s reputation for durability is well-earned, provided it receives the diligent maintenance that such precision engineering demands. With the correct fluid care, this E350 can continue to provide a quiet, stable, and powerful driving experience for years to come.
Additional Maintenance Products
For vehicle owners who store their cars seasonally, AMSOIL offers specialized products to ensure the engine and fuel system remain protected during periods of inactivity. The AMSOIL Gasoline Stabilizer helps keep fuel fresh for up to 12 months, fighting ethanol corrosion and preventing the varnish and gum buildup that can clog fuel injectors. When preparing the vehicle for storage, the AMSOIL Engine Fogging Oil is highly effective; it creates a protective barrier on internal components to prevent rust during long periods of inactivity. For drivers who want to maximize fuel economy and engine performance, the P.i. AMSOIL P.i. Performance Improver Gasoline Additive is a powerful tool that cleans fuel injectors and restores up to 14% horsepower. Furthermore, for exterior care, the AMSOIL Miracle Wash Waterless Wash and Wax Spray offers a quick and easy way to clean the vehicle while leaving a protective finish that repels dust and dirt without the need for water.
Caring for the 2009 Mercedes-Benz E350 requires attention to detail and the use of premium products. By selecting the recommended AMSOIL oils, filters, and fluids, owners can ensure their vehicle receives the protection it needs to run smoothly and efficiently. Whether tackling extreme temperatures, long commutes, or simply extending the time between oil changes, the right lubricants are the key to maintaining the vehicle’s performance and reliability.
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