Mercedes-Benz C-Class Manuals

Mercedes-Benz C-Class Owners Manual: Checking coolant level

Mercedes-Benz C-Class Owners Manual / Maintenance and care / Engine compartment / Checking coolant level

WARNING Risk of burns from hot component parts in the engine compartment
Certain components in the engine compartment can be very hot, e.g. the engine, the radiator and parts of the exhaust system.
  • Allow the engine to cool down and only touch component parts described in the following.

 

WARNING Danger of burns when opening the hood
If you open the hood when the engine has overheated or during a fire in the engine compartment, you could come into contact with hot gases or other escaping operating fluids.
  • Before opening the hood, allow the engine to cool down.
  • In the event of a fire in the engine compartment, keep the hood closed and call the fire service.

 

WARNING Risk of scalding from hot coolant
The engine cooling system is pressurized, particularly when the engine is warm. If you open the cap, you could be scalded by hot coolant spraying out.
  • Let the engine cool down before opening the cap.
  • When opening the cap, wear protective gloves and safety glasses.
  • Open the cap slowly to release pressure.

Engine compartment

  • Park the vehicle on a level surface.
  • Check the coolant temperature display in the instrument cluster.

    The coolant temperature must be below 158 ºF (70 ºC).

  • Slowly turn cap 1 counter-clockwise to relieve overpressure.
  • Continue turning cap 1 counter-clockwise and remove it.

The coolant level is correct:

  • If the engine is cold, up to marker bar 2
  • If the engine is warm, up to 0.6 in (1.5 cm) over marker bar 2
  • If necessary, add coolant that has been approved by Mercedes-Benz.
  • Further information on coolant
    Engine oil

    Adding washer fluid to the windshield washer system

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