2016 Mercedes-Benz Metris Coolant Capacity & Type

The 2016 Mercedes-Benz Metris holds approximately 10.6 to 11.1 quarts (10 to 10.5 liters) of coolant, depending on the engine. For optimal performance and protection, it's crucial to use the correct coolant type and maintain proper levels.

Quick Answer

• Total Cooling System Capacity: 10.6 - 11.1 quarts (10 - 10.5 liters)
• OEM Coolant Spec: Mercedes-Benz Specification 325.0, 325.3, or 326.0 (Antifreeze), or 326.3 (Ready mix). This will typically be a blue or pink/purple HOAT (Hybrid Organic Acid Technology) or a more modern OAT (Organic Acid Technology) coolant, depending on the specific product meeting the Mercedes-Benz spec. Always verify the specific product meets the Mercedes-Benz specification number for your vehicle.
• Mix Ratio: 50/50 concentrate and distilled water, or a pre-mixed 50/50 solution.

Capacity by Engine Option

The 2016 Mercedes-Benz Metris was primarily offered with a 2.0L M274 turbocharged four-cylinder engine. The coolant capacities for this engine are:

• 2.0L M274 Engine: 10.6 - 11.1 quarts (10 - 10.5 liters)

Flush Interval

Mercedes-Benz generally recommends the following flush intervals for their cooling systems:

• Normal Duty: Typically every 5 years or 150,000 miles, whichever comes first.
• Severe Duty: If the vehicle is regularly exposed to extreme temperatures, heavy towing, or frequent stop-and-go traffic, it may be advisable to inspect and potentially flush the coolant every 3 years or 75,000 miles.

Always consult your owner's manual or a certified Mercedes-Benz technician for the most accurate and up-to-date maintenance schedules tailored to your specific vehicle and driving conditions.

How to Refill & Bleed

Properly refilling and bleeding the cooling system is critical to prevent air pockets, which can cause overheating. For the 2016 Mercedes-Benz Metris, follow these general steps:

1. Drain: With the engine cool, place a drain pan under the radiator. Open the radiator drain plug (if equipped) or disconnect the lower radiator hose to drain the old coolant. Flush with distilled water until clear, if desired.
2. Close Drain: Reconnect hoses and close the drain plug.
3. Refill: Begin filling the cooling system with the appropriate Mercedes-Benz approved coolant (50/50 mix) through the coolant reservoir. Fill slowly to allow air to escape.
4. Bleed:
   • Start the engine with the heater set to full hot and the fan on low. Leave the coolant reservoir cap off.
   • As the engine warms up, the thermostat will open, and coolant will begin to circulate. Air bubbles will rise to the reservoir.
   • Maintain the coolant level in the reservoir by adding more until it stabilizes. Some models may have a small bleed screw on a hose or thermostat housing; open this carefully to release trapped air, if present.
   • Continue running the engine until the operating temperature is reached and the cooling fans cycle on and off a few times. This ensures the thermostat has opened fully.
   • Special Note: Mercedes-Benz cooling systems are often designed to self-bleed to a good extent. However, a vacuum fill tool can be used by professionals to ensure all air is removed quickly and efficiently. If you are unsure, professional assistance is recommended.
5. Final Check: Once the engine is cool, recheck the coolant level in the reservoir and top off if necessary.

Common Cooling System Issues

For the Mercedes-Benz Metris generation, some common cooling system issues that owners might encounter include:

• Thermostat Housing Leaks: The plastic components of the thermostat housing can degrade over time, leading to coolant leaks. This is a common failure point.
• Water Pump Failure: Like many vehicles, the water pump can eventually fail, leading to leaks or reduced coolant circulation, causing overheating. Symptoms include whining noises, coolant leaks from the pump, or an overheating engine.
• Radiator Leaks: Over time, the radiator can develop leaks due to corrosion, stone chips, or stress cracks, especially in plastic end tanks.
• Coolant Expansion Tank Issues: The plastic coolant expansion tank can become brittle and crack, leading to coolant loss. The cap also plays a crucial role in maintaining system pressure, and a faulty cap can lead to issues.
• Hose Degradation: Rubber hoses can harden, crack, or soften over time, leading to leaks. Regular inspection of hoses is important.

Addressing these issues promptly can prevent more extensive engine damage.

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