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  • C-Class
  • Cabriolet
  • 06/2020
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Checking the coolant level
WARNING Risk of burns when opening the bonnet
If you open the bonnet when the engine has overheated or when there is a fire in the engine compartment, the following situations may occur:

  • You could come into contact with hot gases.

  • You could come into contact with other hot, escaping operating fluids.

Before opening the bonnet, allow the engine to cool down.
In the event of a fire in the engine compartment, keep the bonnet closed and call the fire service.
WARNING Risk of injury due to moving parts

Components in the engine compartment may continue running or start up suddenly, even if the ignition is switched off.

Make sure of the following before performing tasks in the engine compartment:

Switch the ignition off.
Never reach into the danger zone surrounding moving components, e.g. the rotation area of the fan.
Remove jewellery and watches.
Keep items of clothing and hair away from moving parts.
WARNING Risk of burns from hot component parts in the engine compartment

Certain component parts in the engine compartment can be very hot, e.g. the engine, the cooler and parts of the exhaust system.

Allow the engine to cool down and only touch component parts described in the following.
WARNING Risk of scalding from hot coolant

If you open the cap, you could be scalded.

Let the motor cool down before opening the cap.
When opening the cap, wear protective gloves and safety glasses.
Open the cap slowly to release pressure.
Park the vehicle on a level surface.
Check the coolant temperature display in the instrument cluster.

The coolant temperature must be below 70°C.

Slowly turn cap anti-clockwise to release overpressure.
Continue turning cap anti-clockwise and remove it.
The coolant level is correct in the following cases:

  • If the engine is cold, the coolant is up to marker bar .

  • If the engine is warm, the coolant is up to 1.5 cm over the marker bar .

If necessary, top up with coolant that has been approved for Mercedes-Benz.
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