Mercedes-Benz C-Class-Saloon 2020 Owner's Manual page 505

502 Display messages and warning/indicator lamps
Warning/indicator lamp
ï
Trailer tow hitch warning
lamp
Engine
Warning/indicator lamp
ÿ
Coolant warning lamp
Possible causes/consequences and
* The red trailer hitch warning lamp is lit.
The trailer hitch is not operational.
& WARNING Risk of an accident if the ball neck is not locked
The trailer may become detached.
Stop the vehicle immediately in accordance with the traffic conditions. Do not continue driving.
#
Uncouple the trailer and secure it against rolling away.
#
Initiate a new swivel movement and do not re-couple the trailer until the warning/indicator lamp goes out.
#
Note the messages on the multifunction display.
#
Possible causes/consequences and
* The red coolant warning lamp is lit while the engine is running.
Possible causes:
The temperature sensor is malfunctioning
R
The coolant level is too low
R
The air supply to the radiator is obstructed
R
The radiator fan is faulty
R
M M Solutions
M M Solutions
Internal use only