The 2014 ML350 uses a Mercedes-Benz approved long-life coolant that is silicate-free HOAT, with the purple G13 formulation being the most common option. It is best used as a 50/50 mix with distilled water, unless the product specifies a different ratio.
In practice, this means you should choose a coolant that is explicitly labeled Mercedes-Benz approved and suitable for aluminum engine systems. Using an MB-approved coolant helps protect the engine, radiator, heater core, and water pump, and keeps warranty coverage intact. If you’re unsure, consult your owner’s manual or a Mercedes-Benz dealer for the exact specification required for your vehicle’s region.
Recommended coolant options for the ML350
To help you choose, here are MB-approved coolant options that are commonly used in modern Mercedes-Benz engines and meet the G13/HOAT standard.
- Glysantin G13 (purple) — a Mercedes-Benz approved HOAT coolant compatible with aluminum engines.
- Mercedes-Benz Genuine Antifreeze/Coolant — MB-approved coolant designed for modern MB engines; available in pre-mixed or concentrate form depending on market.
Both options meet Mercedes-Benz requirements when used as directed and mixed in a 50/50 ratio with distilled water, unless the product label specifies a different mixture.
How to replace or top up coolant
If you need to top up or perform a full replacement, follow these steps to ensure proper filling and bleeding of the cooling system.
- Make sure the engine is completely cool before opening the radiator cap or draining any coolant.
- Check the coolant reservoir level against the MIN and MAX marks prior to opening the system.
- If draining for a full replacement, drain the system completely and dispose of old coolant according to local regulations.
- Flush the system with distilled water or a Mercedes-Benz-approved coolant flush until clear, then drain again.
- Prepare a 50/50 mixture of distilled water and MB-approved coolant, or use a pre-mixed MB-approved coolant as directed on the product label.
- Refill to the proper level, start the engine with the heater set to hot, and bleed the system until no air remains; monitor for leaks and top up if necessary.
- Dispose of waste coolant responsibly and wash your hands after handling.
Tip: Use distilled water to avoid mineral buildup. If you live in extremely cold climates, consult MB guidelines for the recommended ratio to prevent freezing.
Summary
The 2014 Mercedes ML350 requires a Mercedes-Benz approved, silicate-free HOAT coolant—most commonly the purple G13 formulation (Glysantin G13) or an MB-approved equivalent. Use a 50/50 mix with distilled water, and follow proper bleeding and replacement procedures. Always verify the exact MB specification with your manual or a dealer, as regional variations can exist.