Engine
Display messages | Possible causes/consequences and Solutions |
![]() The yellow Check Engine warning lamp lights up while the engine is running. |
There may be a malfunction, for example:
The emission limit values may be exceeded and the engine may be running in emergency mode.
|
![]() The yellow
reserve fuel warning lamp flashes while the vehicle is in motion. In addition,
the yellow Check Engine warning lamp
|
The fuel system pressure is too low. The fuel filler cap
is not closed correctly or the fuel system is leaking.
|
![]() The yellow reserve fuel warning lamp lights up while the engine is running. |
The fuel level has dropped into the reserve range.
|
![]() The red coolant warning lamp lights up while the engine is running and the coolant temperature gauge is at the start of the scale. |
The temperature sensor for the coolant temperature gauge
is defective. The coolant temperature is no longer being monitored. There is a risk of engine damage if the coolant temperature is too high.
|
![]() The red coolant warning lamp comes on while the engine is running. |
The coolant level is too low. If the coolant level is correct, the airflow to the engine radiator may be blocked or the electric engine radiator fan may be malfunctioning. The coolant is too hot and the engine is no longer being cooled sufficiently.
|
![]() The red coolant warning lamp comes on while the engine is running. A warning tone also sounds. |
The coolant temperature has exceeded 248 ‡ (120 † ). The
airflow to the engine radiator may be blocked or the coolant level may be
too low. The engine is not being cooled sufficiently and may be damaged.
|
WARNING
Driving when your engine is overheated can cause some fluids which may have leaked into the engine compartment to catch fire. You could be seriously burned. Steam from an overheated engine can cause serious burns which can occur just by opening the engine hood. Stay away from the engine if you see or hear steam coming from it. Stop the vehicle in a safe location away from other traffic. Turn off the engine, get out of the vehicle and do not stand near the vehicle until the engine has cooled down.
If the coolant temperature exceeds 248 ‡(120 †) do not continue driving. The
engine will otherwise be damaged.
See also:
The spray nozzles are misaligned
The windshield washer fluid from the spray
nozzles no longer hits the center of the
windshield. The spray nozzles are misaligned.
Have the spray nozzles adjusted
at a
qualified specialist wo ...
Cleaning the exterior lighting
► Clean the plastic lenses of the
exterior
lights with a wet sponge and a mild cleaning
agent, e.g. Mercedes-Benz car shampoo or
cleaning cloths.
Only use cleaning agents or cleaning
cl ...
SmartKey
SmartKey
0 To remove the SmartKey
Vehicles with automatic transmission: shift the transmission to position P
1 Power supply for some consumers, such as the windshield wipers
2 Ignition (power su ...