2019 Mercedes-Benz Metris Fluid Type Specs

Quick Reference

Fluid	Type/Spec	Capacity
Engine Oil	Mercedes-Benz Spec 229.5; SAE 5W-40	6.1 US qt (5.8 L)
Engine Coolant	Mercedes-Benz Spec 325.0, 325.6 (G48)	~9.5 US qt (9.0 L)
Transmission Fluid	Mercedes-Benz Spec 236.15	Service fill: ~7.5 US qt (7.1 L)
Rear Differential	Mercedes-Benz Spec 235.7, 235.74; SAE 75W-85	~1.2 US qt (1.1 L)
Brake Fluid	Mercedes-Benz Spec 451.1 (DOT 4+)	~1.1 US qt (1.0 L)
Power Steering Fluid	N/A (Electric Power Steering)	N/A
Windshield Washer Fluid	Mercedes-Benz SummerFit / WinterFit	~4.2 US qt (4.0 L)

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Engine Oil

The 2019 Mercedes-Benz Metris, equipped with the 2.0L M274 turbocharged gasoline engine, requires a high-quality synthetic motor oil meeting Mercedes-Benz Spec 229.5. The recommended viscosity is SAE 5W-40. Using an oil with this specific approval is critical for the longevity of the engine's internal components, including the turbocharger and timing chain systems.

Using an oil that does not carry the MB 229.5 approval can lead to premature wear, increased sludge buildup, and potential damage to the sophisticated emissions system. While other oils might be marketed as "European formula" or "for Mercedes-Benz," only those with the official 229.5 approval on the bottle should be used. The service interval is typically 10,000 miles or one year, but it's always best to follow the vehicle's onboard service indicator.

Engine Coolant

Mercedes-Benz vehicles have a long history of using specific coolant formulations to protect their aluminum engines and cooling systems. The 2019 Metris requires a coolant that meets Mercedes-Benz Spec 325.0 or 325.6. This corresponds to a Silicate Hybrid Organic Acid Technology (Si-HOAT) coolant, often referred to by its BASF Glysantin designation, G48. It is typically blue or green in color.

It is critically important to never mix coolant types. Adding a common orange or red Organic Acid Technology (OAT) coolant to the system can cause a chemical reaction that leads to gelling, blockages, and severe cooling system damage. If the coolant is low, top it off only with a product that explicitly meets the MB 325.0 or 325.6 specification. A 50/50 mix of approved coolant and distilled water is essential for proper freeze and corrosion protection. The coolant service interval is typically every 120,000 miles or 10 years, but it should be tested for strength and pH during routine service.

Transmission Fluid

The Metris is equipped with a 7-speed automatic transmission (722.9, also known as 7G-TRONIC PLUS). This transmission requires a specific low-viscosity fluid that meets Mercedes-Benz Spec 236.15. This fluid is often blue in color, distinguishing it from older, red Mercedes-Benz ATF.

Using any other type of ATF, including "universal" fluids or even other Mercedes-Benz specifications like 236.14, will result in poor shifting, accelerated wear, and eventual transmission failure. The 7G-TRONIC PLUS is a highly sophisticated unit that is extremely sensitive to fluid viscosity and friction properties. There is no dipstick for checking the fluid level; it must be checked via a specific service procedure at the correct temperature. The service interval for a fluid and filter change is typically every 60,000 miles.

Rear Differential

As a rear-wheel-drive vehicle, the Metris has a rear differential that requires its own specific gear oil. The correct fluid is a synthetic gear lubricant meeting Mercedes-Benz Spec 235.7 or 235.74, with a viscosity of SAE 75W-85. This fluid ensures proper lubrication and protection for the ring and pinion gears under a wide range of operating temperatures.

Using a standard 75W-90 or 75W-140 gear oil is not recommended unless it explicitly carries the required Mercedes-Benz approval. The additives and friction modifiers in the OEM fluid are formulated for the specific materials used in the differential. The service interval is not always explicitly defined as a "lifetime" fill, so it is wise to replace it every 60,000-80,000 miles as a preventative maintenance measure, especially for vehicles used in commercial service.

Brake Fluid

Brake fluid is one of the most critical safety fluids in any vehicle. For the 2019 Metris, a high-quality brake fluid meeting DOT 4+ and Mercedes-Benz Spec 451.1 is required. The "+" in DOT 4+ indicates a higher boiling point than standard DOT 4 fluid, which is essential for the performance and safety of the vehicle's braking and stability control systems.

Never use DOT 3 or DOT 5 (silicone-based) fluid. Brake fluid is hygroscopic, meaning it absorbs moisture from the atmosphere over time. This moisture lowers the boiling point of the fluid, which can lead to a soft or spongy pedal and reduced braking performance in demanding situations. For this reason, Mercedes-Benz recommends a complete brake fluid flush every 2 years, regardless of mileage.

Power Steering

The 2019 Mercedes-Benz Metris is equipped with an Electric Power Steering (EPS) system. This system uses an electric motor to provide steering assistance, rather than a traditional hydraulic pump and fluid. Therefore, there is no power steering fluid to check or change.

Windshield Washer Fluid

While any quality washer fluid will work, Mercedes-Benz offers its own branded products, SummerFit and WinterFit, which are formulated to clean effectively without leaving streaks on the specific glass and wiper blades used on their vehicles. The WinterFit formula contains antifreeze agents to prevent freezing in the reservoir and lines during cold weather. Ensure the reservoir is filled with a formula appropriate for your climate.

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