2020 MERCEDES-BENZ METRIS display

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

Display messages
Possible causes/consequences and
M Solutions6
SRS Malfunction:
Service Required The restraint system is faulty. In addition, the
6 warning lamp
lights up in the instrument cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be trig-
gered unintentionally or, in the event of an accident, may not be
triggered.
There is an increased risk of injury.
X Have the restraint system and its components checked immedi-
ately at a qualified specialist workshop.
Further information on the restraint system and its components can
be found under "Occupant safety" (Y page 46). 6
Front Left Malfunc‐
tion: Service
Required

or Front
Right Malfunction:
Service Required The front left or right restraint system is malfunctioning. In addition,
the 6 warning lamp lights up in the instrument cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be trig-
gered unintentionally or, in the event of an accident, may not be
triggered.
There is an increased risk of injury.
X Have the restraint system and its components checked immedi-
ately at a qualified specialist workshop. 6
Left Curtain Air‐
bag Malfunction:
Service Required

or
Rt. Curtain Airbag
Malfunction: Ser‐
vice Required There is a malfunction in the left or right window curtain air bag. In
addition, the 6 warning lamp lights up in the instrument cluster.
G WARNING
The left or right window curtain air bag may either be triggered unin-
tentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Have the restraint system checked immediately at a qualified
specialist workshop. Display messages (vehicles with steering wheel buttons)
215
On-board computer and displays Z

Lights
Display messages
Possible causes/consequences and
M Solutionsb
Check Left Low Beam
or
Check Right Low
Beam The left or right-hand low-beam headlamp is faulty.
X
Change the bulb ( Y page 105).b
Check Trailer Left
Turn Signal

or
Check Trailer
Right Turn Signal The left or right-hand trailer turn signal lamp is faulty.
X
Change the bulb (see the trailer manufacturer's operating instruc-
tions). b
Check Trailer
Brake Lamp The trailer brake lamp is faulty.
X Change the bulb (see the trailer manufacturer's operating instruc-
tions). b
Check Trailer Left
Tail Lamp

or Check
Trailer Right Tail
Lamp The left or right-hand trailer tail lamp is faulty.
X Change the bulb (see the trailer manufacturer's operating instruc-
tions). b
Auto Lamp Function
Inoperative The light sensor is faulty. The automatic headlamp feature is mal-
functioning.
X
Switch the light functions on/off manually (Y page
99).
X Visit a qualified specialist workshop. b
Check Rear Left
Turn Signal

or
Check Rear Right
Turn Signal The rear left-hand or rear right-hand turn signal is faulty.
X Change the bulb (Y page 105).b
Check Front Left
Turn Signal

or
Check Front Right
Turn Signal The front left-hand or front right-hand turn signal is faulty.
X Change the bulb (Y page 105).b
Check Center Brake
Lamp The high-mounted brake lamp is faulty.
X
Visit a qualified specialist workshop.216
Display messages (vehicles with steering wheel buttons)
On-board computer and displays

Display messages
Possible causes/consequences and
M Solutionsb
Check Left Tail
and Brake Lamps
or
Check Right Tail
and Brake Lamps The left or right-hand tail lamp/brake lamp is faulty.
X Change the bulb (Y page 105).b
Check Left High
Beam

or Check
Right High Beam The left or right-hand high-beam headlamp is faulty.
X
Change the bulb ( Y page 105).b
License Plate Lamp The left or right-hand license plate lamp is faulty.
X Visit a qualified specialist workshop. b
Switch Off Lights The lights are still switched on when you leave the vehicle. An addi-
tional warning tone sounds.
X Turn the light switch to à or $.b
Check Left Fog Lamp
or
Check Right Fog
Lamp The left-hand or right-hand front fog lamp is faulty.
X Visit a qualified specialist workshop. b
Rear Fog Lamp The rear fog lamp is faulty.
X Change the bulb (Y page
105).b
Check Front Left
Parking Lamp or
Check Front Right
Parking Lamp The front left or front right parking lamp or standing lamp is faulty.
X Change the bulb ( Y page
105).b
Backup Light The left or right-hand back-up lamp is faulty.
X Change the bulb (Y page
105).b
Check Left Tail
Lamp

or Check
Right Tail Lamp The left or right-hand tail lamp is faulty.
X Change the bulb (Y page 105).b
Malfunction See
Operator's Manual The exterior lighting is faulty.
X Visit a qualified specialist workshop. Display messages (vehicles with steering wheel buttons)
217
On-board computer and displays Z

Display messages
Possible causes/consequences and
M SolutionsVehicles with trailer tow hitch: a fuse may be defective.
X Check the fuses and if necessary replace any blown fuses (see
the "Fuse allocation" supplement).
X If the display message does not disappear, consult a qualified
specialist workshop. b
Check Left Daytime
Running Light or
Check Rt. Daytime
Running Light The left or right-hand daytime running lamp is faulty.
X Change the bulb (Y page 105).218
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