2020 MERCEDES-BENZ METRIS check engine

Display messages
Possible causes/consequences and
M SolutionsÐ
Power Steering Mal‐
function See Oper.
Manual An additional warning tone sounds. The steering power assistance
could be malfunctioning. You may need to steer more forcefully.
X Carefully continue to a qualified specialist workshop and have the
steering checked immediately. Â
Obtain a New Key The key needs to be replaced.
X Visit a qualified specialist workshop. Phone No Service Your vehicle is outside the network provider's transmitter/receiver
range. ¥
Check Washer Fluid The washer fluid level in the washer fluid reservoir has dropped
below the minimum.
X Add washer fluid (Y page 256).Indicator and warning lamps in the instrument cluster
General notes
When switching on the ignition, some systems carry out a self-test. Some indicator and warning
lamps may temporarily turn on or start to flash. This is not an indication of any problem. Only
when these indicator and warning lights turn on or start flashing after the engine has started or
during the journey has a malfunction occurred. Indicator and warning lamps in the instrument cluster
227
On-board computer and displays Z

Safety systems
Warning/
indicator
lamp
N Signal type
Possible causes/consequences and
M Solutions$J
ò
N $ (USA only) or J (Canada only): the ABS and brake warning lamps
are lit while the engine is running.
EBD is unavailable due to a malfunction. ABS, BAS, hill start assist and ESP
®
as
well as its driving safety systems, for example, are therefore also unavailable.
ATTENTION ASSIST is deactivated and other driving systems could be automati-
cally deactivated.
G WARNING
The brake system continues to function normally, but without the functions lis-
ted above. The wheels could therefore lock prematurely if you brake hard, for
example.
This causes steerability and braking to be greatly impaired. The braking distance
may increase in emergency braking situations.
If ESP ®
is not operational, ESP ®
will not stabilize the vehicle.
There is an increased risk of skidding and accidents.
X Switch the engine off, wait briefly and start the engine again.
X Check if the display message has disappeared and ESP ®
is operational.
X If the display message continues to be displayed:
R Drive on with care.
R Visit a qualified specialist workshop immediately. $J
N The red
$ (USA only) or J (Canada only) brake system warning lamp is
lit while the engine is running. An additional warning tone sounds.
There is insufficient brake fluid in the brake fluid reservoir.
G WARNING
Braking performance can be impaired.
There is a risk of an accident.
X Stop the vehicle immediately, paying attention to road and traffic conditions.
Do not continue driving under any circumstances.
X Secure the vehicle to prevent it from rolling away ( Y page 138).
X Do not add brake fluid. Adding more will not remedy the malfunction.
X Consult a qualified specialist workshop.
X Observe the display messages. Indicator and warning lamps in the instrument cluster
229
On-board computer and displays Z

Warning/
indicator
lamp
N Signal type
Possible causes/consequences and
M Solutionsò!
N The yellow ABS warning lamp is lit while the engine is running.
ABS has been deactivated due to a malfunction. BAS, hill start assist and ESP
®
as well as its driving safety systems, for example, are therefore also deactiva-
ted.
ATTENTION ASSIST is deactivated and other driving systems could be automati-
cally deactivated.
G WARNING
The brake system continues to function normally, but without the functions lis-
ted above. The wheels could therefore lock prematurely if you brake hard, for
example.
This causes steerability and braking to be greatly impaired. The braking distance
may increase in emergency braking situations.
If ESP ®
is not operational, ESP ®
will not stabilize the vehicle.
There is an increased risk of skidding and accidents.
X Switch the engine off, wait briefly and start the engine again.
X Check if the display message has disappeared and ESP ®
is operational.
X If the display message continues to be displayed:
R Drive on with care.
R Visit a qualified specialist workshop immediately.
If the ABS control unit is faulty, there is also a possibility that other systems will
be restricted or unavailable. ÷
N The yellow ESP
®
warning lamp flashes while the vehicle is in motion.
ESP ®
or traction control is intervening because there is a risk of skidding or at
least one wheel has started to spin.
Cruise control is automatically deactivated.
X When starting off, do not depress the accelerator pedal more than is neces-
sary.
X Ease off the accelerator pedal while driving.
X Adapt your driving style to suit the weather and road conditions.
X Do not deactivate ESP ®
.
In rare cases , it may be best to deactivate ESP ®
(Y page
68).230
Indicator and warning lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lamp
N Signal type
Possible causes/consequences and
M Solutions÷
N The yellow ESP
®
warning lamp is lit while the engine is running.
ESP ®
, BAS, hill start assist, ESP ®
trailer stabilization and Crosswind Assist are
unavailable due to a malfunction.
ATTENTION ASSIST is deactivated and other driving systems could be automati-
cally deactivated.
G WARNING
The brake system continues to function normally, but without the functions lis-
ted above.
The braking distance in an emergency braking situation can thus increase.
If ESP ®
is not operational, ESP ®
will not stabilize the vehicle.
There is an increased risk of skidding and accidents.
X Switch the engine off, wait briefly and start the engine again.
X Check if the display message has disappeared and ESP ®
is operational.
X If the display message continues to be displayed:
R Drive on with care.
R Visit a qualified specialist workshop immediately. Indicator and warning lamps in the instrument cluster
231On-board computer and displays Z

Warning/
indicator
lamp
N Signal type
Possible causes/consequences and
M Solutionså
N The yellow ESP
®
OFF warning lamp is lit while the engine is running or the
ECO start/stop function is activated.
ESP ®
is deactivated. ESP ®
trailer stabilization and Crosswind Assist are deacti-
vated.
G WARNING
If ESP ®
is deactivated, vehicle stabilization assistance is significantly reduced.
There is an increased risk of skidding and accidents.
X Reactivate ESP ®
.
In rare cases , it may be best to deactivate ESP ®
(Y page
68).
X Adapt your driving style to suit the weather and road conditions.
If ESP ®
cannot be activated:
X Drive on with care.
X Have ESP ®
checked at a qualified specialist workshop. 6
N The red restraint system warning lamp is lit while the engine is running.
The restraint system is faulty.
G WARNING
The air bags or Emergency Tensioning Devices may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Observe the display messages.
X Drive on with care.
X Have the restraint system and its components checked immediately at a
qualified specialist workshop.
Further information on the restraint system and its components can be found
under "Occupant safety"
(Y page 46).232
Indicator and warning lamps in the instrument cluster
On-board computer and displays

Engine
Warning/
indicator
lamp
N Signal type
Possible causes/consequences and
M Solutions;
N The yellow Check Engine warning lamp lights up while the engine is running.
There may be a malfunction in the following vehicle systems:
R in the engine management
R in the transmission management
R in the fuel injection system
R in the exhaust system
R in the ignition system (for vehicles with a gasoline engine)
R in the fuel system
The emission limit values may be exceeded and the engine may be running in
emergency mode.
X Have the vehicle checked as soon as possible at a qualified specialist work-
shop. 6
N The yellow reserve fuel warning lamp is on while the engine is running.
The fuel level has dropped to the reserve range.
X Refuel at the nearest gas station. ?
N The red coolant warning lamp comes on while the engine is running.
On vehicles without steering wheel buttons, the coolant temperature gauge is at
the start of the bar display
(Y page 178).
On vehicles with steering wheel buttons, the coolant temperature gauge is at
the start of the scale in the instrument cluster ( Y page 40).
The temperature sensor for the coolant temperature gauge is faulty.
The coolant temperature is no longer being monitored. There is a risk of engine
damage if the coolant temperature is too high.
X Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine. Do not continue driving under any circumstances.
X Secure the vehicle to prevent it from rolling away (Y page
138).
X Consult a qualified specialist workshop. Indicator and warning lamps in the instrument cluster
233
On-board computer and displays Z

Warning/
indicator
lamp
N Signal type
Possible causes/consequences and
M Solutions?
N 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.
X Observe the display messages.
X Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine.
X Secure the vehicle to prevent it from rolling away (Y page 138).
X Exit the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
X Check the coolant level and add coolant, observing the warning notes
(Y page

253).
X If you have to add coolant more frequently, have the engine cooling system
checked.
X Make sure that the air supply to the radiator is not obstructed, by frozen
slush for example.
X Check the coolant temperature:
R using the display in the on-board computer on vehicles without steering
wheel buttons ( Y page

178)
R using the analog display in the instrument cluster on vehicles with steering
wheel buttons ( Y page 40)
X Do not start the engine again until the coolant temperature is below the maxi-
mum value specified below. The engine could otherwise be damaged.
X Drive to the nearest qualified specialist workshop.
Avoid heavy loads on the engine, e.g. driving in mountainous terrain, and
stop-start traffic.
Under normal driving conditions and at the correct coolant level, the coolant
temperature display may rise to the letter H or to the red mark.?
N The red coolant warning lamp comes on while the engine is running. An addi-
tional warning tone sounds.
The coolant temperature has exceeded the maximum value specified below. The
airflow to the engine radiator may be blocked or the coolant level may be too
low.
G WARNING
The engine is not being cooled adequately and could become damaged.
Never drive with an overheated engine. Otherwise, fluids which may have leaked
into the engine compartment could catch fire.
In addition, steam from an overheated engine can cause serious burns, which
can occur just by opening the hood.
There is a risk of injury.
X Observe the display messages.
X Stop the vehicle immediately, paying attention to road and traffic conditions,
and switch off the engine. 234
Indicator and warning lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lamp
N Signal type
Possible causes/consequences and
M SolutionsX
Secure the vehicle to prevent it from rolling away ( Y page 138).
X Exit the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
X Check the coolant level and add coolant, observing the warning notes
(Y page
253).
X If you have to add coolant more frequently, have the engine cooling system
checked.
X Make sure that the air supply to the radiator is not obstructed, by frozen
slush for example.
X Check the coolant temperature:
R using the display in the on-board computer on vehicles without steering
wheel buttons ( Y page

178)
R using the analog display in the instrument cluster on vehicles with steering
wheel buttons ( Y page 40)
X If the coolant temperature is below the maximum value specified below, you
can continue driving to the nearest qualified specialist workshop.
Avoid heavy loads on the engine, e.g. driving in mountainous terrain, and
stop-start traffic.
Under normal driving conditions and at the correct coolant level, the coolant
temperature display may rise to the letter H or to the red mark.Driving systems
Warning/
indicator
lamp
N Signal type
Possible causes/consequences and
M Solutions·
N The red distance warning lamp lights up while the vehicle is in motion.
The distance to the vehicle in front is too small for the speed selected.
X Increase the distance. ·
N The red distance warning lamp lights up while the vehicle is in motion. An
additional warning tone sounds.
You are approaching a vehicle or a stationary obstacle in your line of travel at
too high a speed.
X Be prepared to brake immediately.
X Pay particular attention to the traffic situation. You may have to brake or take
evasive action.
Further information about the distance warning function can be found under
"COLLISION PREVENTION ASSIST"
(Y page 149). Indicator and warning lamps in the instrument cluster
235
On-board computer and displays Z