2016 Mercedes-Benz Sprinter Coolant Capacity & Type

The 2016 Mercedes-Benz Sprinter typically holds between 10.5 to 11.5 quarts (9.9 to 10.9 liters) of coolant, depending on the engine and configuration.

Quick answer

• Total Cooling System Capacity: 10.5 - 11.5 quarts (9.9 - 10.9 Liters)
• OEM Coolant Spec: Mercedes-Benz Specification 325.0, 325.5, or 326.0 (Antifreeze), or MB 325.6 or 326.6 (Antifreeze Concentrate). These are typically a blue or blue-green, phosphate-free, silicate-containing hybrid organic acid technology (HOAT) coolant.
• Mix Ratio: 50/50 with distilled water for concentrate, or pre-mixed 50/50 solution.

Capacity by engine option

These capacities are approximate and may vary slightly based on specific vehicle configuration (e.g., presence of auxiliary heaters).

Flush interval

• Normal Duty: Mercedes-Benz generally recommends a coolant flush and fill every 155,000 miles (250,000 km) or 5 years, whichever comes first.
• Severe Duty: If your Sprinter is operated under severe conditions (e.g., frequent towing, extreme temperatures, dusty environments, extensive idling), it's advisable to inspect your coolant more frequently and consider reducing the flush interval to every 100,000 miles (160,000 km).

Always refer to your owner's manual for the most accurate and up-to-date maintenance schedule for your specific vehicle.

How to refill & bleed

Refilling and bleeding the cooling system on a 2016 Mercedes-Benz Sprinter is crucial to prevent air pockets that can lead to engine overheating. Follow these general steps:

1. Drain the system: With the engine cool, open the drain plug on the radiator and possibly on the engine block if accessible. Collect all old coolant in a suitable container for proper disposal.
2. Flush (optional but recommended): If performing a full flush, close the drains, fill with distilled water, run the engine to operating temperature with the heater on high, then drain again. Repeat until the water runs clear. A dedicated cooling system flush chemical can also be used following product instructions.
3. Refill: Close all drains. Slowly add the correct Mercedes-Benz approved 50/50 coolant mix to the expansion tank until it reaches the MAX mark. Avoid overfilling.
4. Bleeding Procedure:
   • Start the engine and let it idle with the expansion tank cap off. Turn the cabin heater to its maximum temperature and fan speed to open the heater core valve and allow coolant to circulate through it.
   • Monitor the coolant level in the expansion tank and top it off as it drops. You may see air bubbles escaping. Gently squeeze the upper and lower radiator hoses to help dislodge air pockets.
   • Some Sprinter models may have a small bleed screw on a hose or thermostat housing; open this carefully until coolant, not air, emerges, then close it. (Consult your service manual for exact locations if present).
   • Once the engine reaches operating temperature and no more bubbles are escaping, replace the expansion tank cap. Drive the vehicle for a short period, allow it to cool completely, and recheck the coolant level, topping up if necessary.

For best results and to minimize air pockets, consider using a vacuum filling tool to draw a vacuum on the cooling system before refilling. This method pulls the new coolant into the system cleanly and efficiently, reducing the need for extensive bleeding.

Common cooling system issues

Owners of 2016 Mercedes-Benz Sprinters, like many vehicles, can encounter specific cooling system issues. Some common problems for this generation include:

• EGR Cooler Leaks: Particularly prevalent on the OM642 V6 diesel engine. The Exhaust Gas Recirculation (EGR) cooler can develop internal leaks, leading to coolant loss (often without external drips) and potential contamination of the exhaust system or even engine oil.
• Coolant Loss/Evidence of Leaks: While not always catastrophic, minor leaks can occur from hoses, the radiator, water pump seals, or the expansion tank itself. Regularly checking for puddles under the vehicle or a drop in coolant level is advisable.
• Thermostat Issues: A failing thermostat can cause the engine to run too hot (stuck closed) or too cold (stuck open), impacting performance and fuel efficiency. It can also lead to Diagnostic Trouble Codes (DTCs).
• Water Pump Failure: The water pump, like any mechanical component, can wear out, leading to leaks from the weep hole or bearing noise. A failing water pump will compromise coolant circulation and can cause overheating.
• Radiator/Intercooler Cracks: Over time, plastic end tanks on the radiator or intercooler can become brittle and crack, leading to coolant loss or reduced cooling efficiency.

Regular inspection of cooling system components, adherence to the recommended maintenance schedule, and using the correct coolant type are vital for the longevity of your Sprinter's engine.

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