Mercedes-Benz S-Class Coupe 2018, Operator'S Manual

Page: 462 / 502

Warning/indicator lamp
Possible causes/consequences and M Solutions
?
Coolant warning lamp
The red coolant warning lamp is lit while the engine is running.
Possible causes are:
R
The temperature sensor is malfunctioning
R
Coolant level too low
R
The air supply to the radiator is obstructed
R
The radiator fan is defective
If there is an additional warning tone, the coolant temperature has exceeded the maximum permissible temperature.
& 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.
#
Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions. Do
not continue driving under any circumstances.
#
Observe the messages in the multifunction display.
If the coolant temperature display is at the lower end of the temperature scale:
#
Consult a qualified specialist workshop.
460 Display messages and warning/indicator lamps