Mercedes-Benz C-Class Manuals

Mercedes-Benz C-Class (W205) 2015 - 2021 Owners Manual: Coolant

Notes on coolant

Observe the notes on operating fluids.

WARNING ‑ Risk of fire and injury from antifreeze
If antifreeze comes into contact with hot component parts in the engine compartment, it may ignite.
  • Allow the engine to cool down before adding antifreeze.
  • Make sure that no antifreeze spills out next to the filler opening.
  • Thoroughly clean off any antifreeze from component parts before starting the vehicle.


NOTE Damage caused by incorrect coolant
  • Only add coolant that has been premixed with the required antifreeze protection.

Information on coolant is available at the following locations:

  • In the Mercedes-Benz Specification for Operating Fluids 310.1
    • At
    • In the Mercedes-Benz BeVo app
  • At a qualified specialist workshop


NOTE Overheating at high outside temperatures
If an inappropriate coolant is used, the engine cooling system is not sufficiently protected against overheating and corrosion at high outside temperatures.
  • Always use coolant approved by Mercedes-Benz.
  • Observe the instructions in the Mercedes-Benz Specifications for Operating Fluids 310.1.

Have the coolant regularly replaced at a qualified specialist workshop.

The proportion of corrosion inhibitor/antifreeze concentrate in the engine cooling system should be:

  • a minimum of 50% (antifreeze protection down to approximately -35 ºF (-37 ºC) )
  • a maximum of 55% (antifreeze protection down to -49 ºF (-45 ºC) )

Coolant capacity

Operating fluids

Notes on windshield washer fluid

Observe the notes on operating fluids.

WARNING ‑ Risk of fire and injury from windshield washer concentrate
Windshield washer concentrate is highly flammable. It could ignite if it comes into contact with hot engine component parts or the exhaust system.
  • Make sure that no windshield washer concentrate spills out next to the filler opening.


NOTE Damage to the exterior lighting due to unsuitable windshield washer fluid
Unsuitable windshield washer fluid may damage the plastic surface of the exterior lighting.
  • Only use windshield washer fluid which is also suitable for use on plastic surfaces, e.g. MB SummerFit or MB Winter‐ Fit.


NOTE Blocked spray nozzles caused by mixing windshield washer fluids
  • Do not mix MB SummerFit and MB WinterFit with other windshield washer fluids.

Do not use distilled or de-ionized water as the fill level sensor may be triggered erroneously.

Recommended windshield washer fluid:

  • Above freezing point: e.g. MB SummerFit
  • Below freezing point: e.g. MB WinterFit

For the correct mixing ratio, refer to the information on the antifreeze container.

Mix the washer fluid with the windshield washer fluid all year round.

    Engine oil


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