2020 MERCEDES-BENZ METRIS stop start

Display messages
Possible causes/consequences and
M SolutionsX
Visit a qualified specialist workshop immediately.
Further information on the Occupant Classification System (OCS)
can be found under "Occupant Classification System (OCS)"
(Y page
54). #
Check Brake Pad
Wear The brake pads/linings have reached their wear limit.
X Visit a qualified specialist workshop. $ (USA only)
J (Canada only)
Check Brake Fluid
Level 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 malfunc-
tion.
X Consult a qualified specialist workshop. EBD, ABS, ESP Inop‐
erative
+ 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 automatically deactivated.
G WARNING
The brake system continues to function normally, but without the
functions listed 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 can 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 opera-
tional.
X If the display message continues to be displayed:
R Drive on with care.
R Visit a qualified specialist workshop immediately. Display messages (vehicles without steering wheel buttons)
199On-board computer and displays Z

Engine
Display messages
Possible causes/consequences and
M Solutions# An additional warning tone sounds. The battery is not being
charged.
Possible causes:
R faulty alternator
R torn poly-V-belt
R a malfunction in the electronics
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
! Do not drive any further. Otherwise the engine may overheat.
X Secure the vehicle to prevent it from rolling away ( Y page 138).
X Consult a qualified specialist workshop. ?
Stop Vehicle Turn
Eng. Off An additional warning tone sounds. The coolant is too hot.
G WARNING
Never drive with an overheated engine. Driving when the engine is
overheated can cause fluids which may have leaked into the engine
compartment to 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 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 Wait until the engine has cooled down.
X Make sure that the air supply to the radiator is not obstructed, by
frozen slush for example.
X Do not start the engine again until the display message goes out
and the coolant temperature is below the maximum value speci-
fied. The engine could otherwise be damaged.
X Pay attention to the coolant temperature gauge (Y page
178).
X If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal driving conditions and at the correct coolant level, the
coolant temperature gauge may rise to the letter H.204
Display messages (vehicles without steering wheel buttons)
On-board computer and displays

Tires
Display messages
Possible causes/consequences and
M SolutionsCorrect Tire Pres‐
sure The tire pressure is too low in at least one of the tires, or the tire
pressure difference between the wheels is too great.
X Check the tire pressure at the next opportunity (Y page 285).
X If necessary, correct the tire pressure.
X Restart the tire pressure monitor ( Y page
288).Check Tire Pres‐
sure Soon An additional warning tone sounds.
The tire pressure in one or more tires has dropped significantly.
G WARNING
Tire pressure that are too low pose the following hazards: R The tires may burst, especially as the load and vehicle speed
increase.
R The tires may wear excessively and/or unevenly, which may
greatly impair tire traction.
R The handling as well as steering and braking characteristics may
be severely affected.
There is a risk of an accident.
X Stop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions while doing so.
X Secure the vehicle to prevent it from rolling away (Y page
138).
X Check the tires and, if necessary, change the wheel
(Y page

297).
X Check the tire pressure (Y page
285).
X If necessary, correct the tire pressure. Caution! Tire Mal‐
func. The tire pressure in one or more tires has dropped suddenly.
G WARNING
Driving with a flat tire poses a risk of the following hazards: R A flat tire affects the ability to steer or brake the vehicle.
R You could then lose control of the vehicle.
R Continued driving with a flat tire will cause excessive heat build-
up and possibly a fire.
There is a risk of an accident.
X Stop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions while doing so.
X Secure the vehicle to prevent it from rolling away (Y page
138).
X Check the tires and, if necessary, change the wheel
(Y page

297). Display messages (vehicles without steering wheel buttons)
207
On-board computer and displays Z

Display messages
Possible causes/consequences and
M SolutionsTire Press. Moni‐
tor Currently
Unavail. Due to a source of radio interference, no signals can be received
from the wheel sensors. The tire pressure monitor is temporarily
malfunctioning.
The tire pressure monitor restarts automatically as soon as the
problem has been solved. Tire Press. Moni‐
tor Inoperative The tire pressure monitor is malfunctioning and switched off. Either
the installed wheels do not have suitable tire pressure sensors or
the system is malfunctioning, e.g. because a tire pressure sensor is
faulty.
X Install wheels with suitable tire pressure sensors.
The tire pressure monitor is activated automatically after driving
for a few minutes.
or X Visit a qualified specialist workshop. Vehicle
Display messages
Possible causes/consequences and
M SolutionsÒ The tailgate is open.
X Close the tailgate. Ñ The rear door is open.
X Close the rear door(s). Ó An additional warning tone sounds. The hood is open.
G WARNING
The open hood may then block your view when the vehicle is in
motion.
There is a risk of an accident.
X Stop the vehicle immediately, paying attention to road and traffic
conditions.
X Secure the vehicle to prevent it from rolling away (Y page 138).
X Close the hood. 0 An additional warning tone sounds while the vehicle is in motion.
The display shows the open door(s).
X Close all doors. Ð
Pwr. Steering Mal‐
funct.
+ 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. 208
Display messages (vehicles without steering wheel buttons)
On-board computer and displays

Display messages
Possible causes/consequences and
M SolutionsIf these conditions are not met, the Occupant Classification System
(OCS) is malfunctioning.
X Install the child restraint system on a suitable rear seat.
or X Seat a person of smaller stature on a suitable rear seat.
X Visit a qualified specialist workshop immediately.
Further information on the Occupant Classification System (OCS)
can be found under "Occupant Classification System (OCS)"
(Y page
54). Check Brake Pad
Wear The brake pads/linings have reached their wear limit.
X Visit a qualified specialist workshop. $ (USA only)
J (Canada only)
Check Brake Fluid
Level 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 malfunc-
tion.
X Consult a qualified specialist workshop immediately. T
ò÷
Inoperative See
Operator's Manual 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 automatically deactivated.
G WARNING
The brake system continues to function normally, but without the
functions listed 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 can 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 Drive on with care.
X Visit a qualified specialist workshop immediately. Display messages (vehicles with steering wheel buttons)
213
On-board computer and displays Z

Display messages
Possible causes/consequences and
M Solutions÷
Inoperative See
Operator's Manual ESP
®
, BAS and hill start assist are unavailable due to a malfunction.
ATTENTION ASSIST is deactivated and other driving systems could
be automatically deactivated.
G WARNING
The brake system continues to function normally, but without the
functions listed 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 Drive on with care.
X Visit a qualified specialist workshop immediately. ÷
Currently Unavail.
See Operator's Man‐
ual ESP
®
, BAS and hill start assist are unavailable due to a malfunction.
The self-diagnosis function, for example, may not be complete.
ATTENTION ASSIST is deactivated and other driving systems could
be automatically deactivated.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you brake
hard, for example.
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 Drive on with care on a suitable stretch of road, making slight
steering movements at a speed above 12 mph (20 km/h
).
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed: X Drive on with care.
X Visit a qualified specialist workshop immediately. F (USA
only) ! (Canada only)
Release Parking
Brake The red
F (USA only)/ ! (Canada only) indicator lamp in the
instrument cluster lights up and a warning tone also sounds.
You are driving with the parking brake applied or are making an
emergency stop using the parking brake.
X Release the parking brake (Y page
138).214
Display messages (vehicles with steering wheel buttons)
On-board computer and displays

Engine
Display messages
Possible causes/consequences and
M Solutions# An additional warning tone sounds. The battery is not being
charged.
Possible causes:
R faulty alternator
R torn poly-V-belt
R a malfunction in the electronics
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
! Do not drive any further. Otherwise the engine may overheat.
X Secure the vehicle to prevent it from rolling away ( Y page 138).
X Consult a qualified specialist workshop. ?
Coolant Too Hot:
Stop Vehicle Turn
Engine Off An additional warning tone sounds. The coolant is too hot.
G WARNING
Never drive with an overheated engine. Driving when the engine is
overheated can cause fluids which may have leaked into the engine
compartment to 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 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 Wait until the engine has cooled down.
X Make sure that the air supply to the radiator is not obstructed, by
frozen slush for example.
X Do not start the engine again until the display message goes out
and the coolant temperature is below the maximum value speci-
fied. The engine could otherwise be damaged.
X Monitor the ? coolant temperature gauge in the instrument
cluster.
X If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and at the correct coolant level,
the display may rise to the red mark. Display messages (vehicles with steering wheel buttons)
219
On-board computer and displays Z

Display messages
Possible causes/consequences and
M Solutions? The fan motor is faulty.
X Check the ? coolant temperature gauge in the instrument
cluster.
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 ter-
rain, and stop-start traffic.
Under normal operating conditions and at the correct coolant level,
the display may rise to the red mark. +
Check Coolant
Level See Oper.
Manual The coolant level is too low.
! Avoid longer journeys when there is insufficient coolant in the
engine cooling system. You could otherwise damage the engine.
X Add coolant, making sure to observe the warning notes
(Y page 253).
X Have the engine cooling system checked at a qualified specialist
workshop if the coolant needs to be refilled more often than
usual. 4
Check Engine Oil
At Next Refueling X
Check the oil level at the latest when next refueling
(Y page

252).
X If necessary, add engine oil (Y page
253).
X Have the engine checked at a qualified specialist workshop if you
need to add engine oil more often than usual.
! Avoid longer journeys when there is insufficient engine oil. You
could otherwise damage the engine. 4
Manually Check Oil
Level Reminder to check the oil level.
X Check the oil level at the latest when next refueling
(Y page
252).
X If necessary, add engine oil (Y page
253).
X To confirm the oil check: press a.
! Avoid longer journeys when there is insufficient engine oil. You
could otherwise damage the engine. 4
Eng. Oil Level
Low: Stop Vehicle
Turn Engine Off The oil level is too low. There is a risk of engine damage.
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 Check the oil level ( Y page
252).
X If necessary, add engine oil (Y page
253).220
Display messages (vehicles with steering wheel buttons)
On-board computer and displays