2020 MERCEDES-BENZ METRIS light

Display messages
Possible causes/consequences and
M SolutionsFront Passenger
Airbag Enabled
+ The co-driver's front air bag is enabled during the journey even
though the co-driver's seat:
R is occupied by a child in a child restraint system, or a person of
small stature
or
R is not occupied.
The system may detect objects or forces that are adding to the
weight applied to the seat.
G WARNING
The co-driver's air bag may deploy unintentionally.
There is an increased risk of injury.
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 Switch off the ignition.
X Open the front-passenger door.
X Remove the child and the child restraint system from the co-driv-
er's seat.
X Make sure there are no objects applying additional weight to the
seat.
The system may otherwise detect the additional weight and inter-
pret the vehicle seat occupant's weight as greater than it actually
is.
X Make sure that the co-driver's seat is unoccupied, close the co-
driver's door and switch on the ignition.
X Observe the PASSENGER AIRBAG OFF indicator lamp in the cen-
ter console and the display and check the following:
Seat unoccupied and ignition switched on:
R The PASSENGER AIRBAG OFF indicator lamp must light up contin-
uously. If the indicator lamp is on, the Occupant Classification
System (OCS) has disabled the co-driver's air bag

(Y page 54).
R The display must not show the messages Front Passenger
Airbag Enabled or Front Passenger Airbag Disabled.
X Wait for at least one minute until the necessary system checks
have been completed.
X Ensure that the display does not show either of the two display
messages about the co-driver's front air bag.
If these conditions are met, the co-driver's seat can be occupied
again. Observe the notes on the Occupant Classification System
(OCS)

(Y page 54).
If 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.198
Display messages (vehicles without steering wheel buttons)
On-board computer and displays

Display messages
Possible causes/consequences and
M Solutions÷
Inoperative
+ 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 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. ÷
Currently Unavail.
+ 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 make
slight steering movements at a speed above
12 mph (20 km/h).
If the display message disappears, the functions mentioned
above are available again.
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.200
Display messages (vehicles without steering wheel buttons)
On-board computer and displays

Display messages
Possible causes/consequences and
M SolutionsF (USA
only) ! (Canada only)
Release Park. 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).6
Malfunction Ser‐
vice Req. 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
Fr. Left Malf. Ser‐
vice Req.

or Fr.
Right Malf. Ser‐
vice Req. 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. Left Curtain Air‐
bag Service
Required

or Rt.
Curtain Airbag 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 without steering wheel buttons)
201
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
Chk. Trailer L.
Turn Sig.

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

or Chk.
Trailer R. 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 Lamps Inopera‐
tive 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
Chk. Rear L. Turn
Signal

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

or Chk.
Front R. Turn Sig‐
nal The front left-hand or front right-hand turn signal is faulty.
X Change the bulb (Y page 105).b
Chk. Center Brake
Lamp The high-mounted brake lamp is faulty.
X
Visit a qualified specialist workshop. b
Chk. L. Tail/
Brake Lamp

or Chk.
R. Tail/ Brake Lamp The left or right-hand tail lamp/brake lamp is faulty.
X Change the bulb (Y page 105).202
Display messages (vehicles without steering wheel buttons)
On-board computer and displays

Display messages
Possible causes/consequences and
M Solutionsb
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
Chk. Front L. Park‐
ing Lamp

or Chk.
Front R. 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 backup 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 The exterior lighting is faulty.
X Visit a qualified specialist workshop. Vehicles 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
Chk. L. Day Run‐
ning Lgt.

or Chk.
R. Day Running Lgt. The left or right-hand daytime running lamp is faulty.
X Change the bulb (Y page 105).Display messages (vehicles without steering wheel buttons)
203
On-board computer and displays Z

X
Press : or 9 to scroll through the display messages.
All of the stored display messages are numbered in the message memory. The current mes-
sage number is displayed as a guide together with the number of stored display messages in
the bottom line of the display.
X Press % to exit the display messages. Safety systems
Display messages
Possible causes/consequences and
M Solutionsò ÷
Inoperative See
Operator's Manual ABS, BAS, hill start assist, and ESP
®
as well as its driving safety sys-
tems 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 wheels could therefore lock 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. ò ÷
Currently Unavail.
See Operator's Man‐
ual ABS, BAS, hill start assist, and ESP
®
as well as its driving safety sys-
tems are temporarily unavailable.
ATTENTION ASSIST is deactivated and other driving systems could
be automatically deactivated.
For example, the on-board voltage may be insufficient.
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.
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 and on a suitable stretch of road make slight
steering movements at a speed above 12 mph (20 km/h ).
If the display message continues to be displayed: X Drive on with care.
X Visit a qualified specialist workshop immediately.210
Display messages (vehicles with steering wheel buttons)
On-board computer and displays

Display messages
Possible causes/consequences and
M SolutionsFront Passenger
Airbag Disabled
See Operator's Man‐
ual The co-driver's air bag is deactivated during the journey even
though the co-driver's seat is occupied by an adult or a person with
a stature corresponding to that of an adult.
If additional forces are applied to the seat or the occupant is not sit-
ting on the seat properly (Y page
54), the weight the system
detects may be too low.
G WARNING
The co-driver's front air bag will not deploy in the event of an acci-
dent.
There is an increased risk of injury.
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 Switch off the ignition.
X The co-driver must get out of the vehicle.
X Make sure that the co-driver's seat is unoccupied, close the co-
driver's door and switch on the ignition.
X Observe the PASSENGER AIRBAG OFF indicator lamp in the cen-
ter console and the display messages and check the following:
Seat unoccupied and ignition switched on: R The PASSENGER AIRBAG OFF indicator lamp must light up contin-
uously. If the indicator lamp is on, the Occupant Classification
System (OCS) has disabled the co-driver's air bag

(Y page 54).
R The display must not show the messages Front Passenger
Airbag Enabled See Operator's Manual or Front
Passenger Airbag Disabled See Operator's Manual.
X Wait for at least one minute until the necessary system checks
have been completed.
X Ensure that the display does not show either of the two display
messages about the co-driver's front air bag.
If these conditions are met, the co-driver's seat can be occupied
again.
If these conditions are not met, the Occupant Classification System
(OCS) is malfunctioning.
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). Display messages (vehicles with steering wheel buttons)
211
On-board computer and displays Z

Display messages
Possible causes/consequences and
M SolutionsFront Passenger
Airbag Enabled See
Operator's Manual The co-driver's front air bag is enabled during the journey even
though the co-driver's seat:
R is occupied by a child in a child restraint system, or a person of
small stature
or
R is not occupied.
The system may detect objects or forces that are adding to the
weight applied to the seat.
G WARNING
The co-driver's air bag may deploy unintentionally.
There is an increased risk of injury.
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 Switch off the ignition.
X Open the front-passenger door.
X Remove the child and the child restraint system from the co-driv-
er's seat.
X Make sure there are no objects applying additional weight to the
seat.
The system may otherwise detect the additional weight and inter-
pret the vehicle seat occupant's weight as greater than it actually
is.
X Make sure that the co-driver's seat is unoccupied, close the co-
driver's door and switch on the ignition.
X Observe the PASSENGER AIRBAG OFF indicator lamp in the cen-
ter console and the display and check the following:
Seat unoccupied and ignition switched on:
R The PASSENGER AIRBAG OFF indicator lamp must light up contin-
uously. If the indicator lamp is on, the Occupant Classification
System (OCS) has disabled the co-driver's air bag

(Y page 54).
R The display must not show the messages Front Passenger
Airbag Enabled See Operator's Manual or Front
Passenger Airbag Disabled See Operator's Manual.
X Wait for at least one minute until the necessary system checks
have been completed.
X Ensure that the display does not show either of the two display
messages about the co-driver's front air bag.
If these conditions are met, the co-driver's seat can be occupied
again. Observe the notes on the Occupant Classification System
(OCS) ( Y page

54).212
Display messages (vehicles with steering wheel buttons)
On-board computer and displays