
Display messagesPossible causes/consequences and M SolutionsGRisk of accident
If the display message is shown and the  ä warning lamp flashes
at the same time, ETS (Electronic Traction System) is deactivated.
The brakes on the drive wheels could otherwise overheat.
XLet the brakes cool down until the display message disappears
and the  ä warning lamp goes out.
ETS is active again.G
Tele Aid 
InoperativeUSA only: one or more main functions in the mbrace system are
malfunctioning.
Canada only: one or more of the main functions of the TELEAID
system is malfunctioning.XUSA only: have the mbrace system checked at a qualified
specialist workshop.XCanada only: have the TELEAID system checked at a qualified
specialist workshop.Check Child Seat 
Pos.
See Operator's 
ManualGRisk of injury
Vehicles with BabySmart™ (Canada only): 
The BabySmart™ child seat is positioned incorrectly.
XInstall the child seat in the correct position.GRisk of injury
Vehicles with BabySmart™ (Canada only):
The sensor for automatic child seat recognition is faulty.
XVisit a qualified specialist workshop.6
SRS Malfunction 
Service RequiredGRisk of injury
There is a malfunction in the SRS (Supplemental Restraint
System). The  6 warning lamp also lights up in the instrument
cluster. 
XVisit a qualified specialist workshop.6
Front Left SRS 
Malfunction 
Service Required
or
Front Right SRS 
Malfunction 
Service RequiredGRisk of injury
SRS has malfunctioned at the front on the left or right. The  6
warning lamp also lights up in the instrument cluster.
XVisit a qualified specialist workshop.Display messages177On-board computer and displaysBA 204.9 USA, CA Edition A 2011; 1; 6, en-USd2mwentsVersion: 3.0.3.62010-06-15T08:58:39+02:00 - Seite 177Z 

Display messagesPossible causes/consequences and M Solutions6
Rear Left SRS 
Malfunction 
Service Required
or
Rear Right SRS 
Malfunction 
Service RequiredGRisk of injury
SRS has malfunctioned at the rear on the left or right. The  6
warning lamp also lights up in the instrument cluster.
XVisit a qualified specialist workshop.6
Rear Center SRS 
Malfunction 
Service RequiredGRisk of injury
SRS has malfunctioned at the rear center. The  6 warning lamp
also lights up in the instrument cluster.
XVisit a qualified specialist workshop.6
Left Side Curtain 
Airbag Malfunction 
Service Required
or
Right Side Curtain 
Airbag Malfunction 
Service RequiredGRisk of injury
There is a malfunction in the left-hand and/or right-hand window
curtain air bag. The  6 warning lamp also lights up in the
instrument cluster.
XVisit a qualified specialist workshop.GWarning
In the event a malfunction of the SRS is indicated as outlined above, the SRS may not be
operational.
For your safety, we strongly recommend that you contact an authorized Mercedes-Benz Center
immediately to have the system checked. Otherwise the SRS may not be activated when needed
in an accident, which could result in serious or fatal injury, or it might deploy unexpectedly and
unnecessarily which could also result in injury.
178Display messagesOn-board computer and displays
BA 204.9 USA, CA Edition A 2011; 1; 6, en-USd2mwentsVersion: 3.0.3.62010-06-15T08:58:39+02:00 - Seite 178 

Display messagesPossible causes/consequences and M SolutionsFront Passenger 
Airbag Enabled
See Operator's 
ManualThe front-passenger air bag is enabled during the journey,
although:
R there is a child, a small adult or an object weighing less than the
system's weight threshold on the front-passenger seat.
R the front-passenger seat is unoccupied.
The system may detect the additional weight of objects on the
seat or forces acting on the seat.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XEngage the parking brake.XSwitch off the ignition.XOpen the front-passenger door.XRemove the child and the child restraint system from the front-
passenger seat.XIf necessary, secure the child in a child restraint system on a
suitable rear seat.XMake sure that there are no objects adding to the weight applied
to the seat. The system may otherwise detect the additional
weight and interpret the seat occupant's weight as greater than
it actually is.XMake sure that the seat is unoccupied and has no objects placed
on it, close the front-passenger door, and switch on the ignition.
Observe the  45(Y  page 41) indicator lamps and the
multifunction display and check the following:
Seat unoccupied and ignition switched on:
R the  45  indicator lamp must light up and remain lit. When
the indicator lamp is on, OCS ( Y page 41) has deactivated the
front-passenger air bag.
R The  Front Passenger Airbag Enabled See Operator's 
Manual  or Front Passenger Airbag Disabled See 
Operator's Manual  display messages must not appear. Wait
for at least 60 seconds until the necessary system checks have
been completed and to make sure that the display messages do
not appear in the multifunction display.
If these conditions are met, the front-passenger seat can be
occupied again. Whether the  45 indicator lamp remains lit
or goes out depends on how OCS classifies the occupant.
If the conditions are not met, the system is not operating correctly.
XVisit a qualified specialist workshop immediately.Display messages179On-board computer and displaysBA 204.9 USA, CA Edition A 2011; 1; 6, en-USd2mwentsVersion: 3.0.3.62010-06-15T08:58:39+02:00 - Seite 179Z 

GWarning
If the 45  indicator lamp remains off even after performing the above corrective steps, do
not have any children 12 years old and under and other small individuals use the front-passenger
seat until the system has been repaired.
Display messagesPossible causes/consequences and  M SolutionsFront Passenger 
Airbag Disabled
See Operator's 
ManualThe front-passenger air bag is deactivated during the journey even
though an adult or a person larger than a certain size is occupying
the front-passenger seat. If additional forces are applied to the
seat, the system may interpret the occupant's weight as lower
than it actually is.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XEngage the parking brake.XSwitch off the ignition.XHave the occupant get out of the vehicle.XMake sure that the seat is unoccupied and has no objects placed
on it, close the front-passenger door, and switch on the ignition.
Observe the  45(Y  page 41) indicator lamps and the
multifunction display and check the following:
Seat unoccupied and ignition switched on:
R the  45  indicator lamp must light up and remain lit. When
the indicator lamp is on, OCS ( Y page 41) has deactivated the
front-passenger air bag.
R The  Front Passenger Airbag Enabled See Operator's 
Manual  or Front Passenger Airbag Disabled See 
Operator's Manual  display messages must not appear. Wait
for at least 60 seconds until the necessary system checks have
been completed and to make sure that the display messages do
not appear in the multifunction display.
If these conditions are met, the front-passenger seat can be
occupied again. Whether the  45 indicator lamp remains lit
or goes out depends on how OCS classifies the occupant.
If the conditions are not met, the system is not operating correctly.
XVisit a qualified specialist workshop immediately.GWarning
If the  45  indicator lamp remains lit with an adult occupant on the front-passenger seat
even after performing the above corrective steps, do not have any passenger use the front-
passenger seat until the system has been repaired.
180Display messagesOn-board computer and displays
BA 204.9 USA, CA Edition A 2011; 1; 6, en-USd2mwentsVersion: 3.0.3.62010-06-15T08:58:39+02:00 - Seite 180 

BrakesDisplay messagesPossible causes/consequences and M Solutions$ (USA only)
J (Canada only)
 ABS and ESC 
Currently 
Unavailable See 
Operator's ManualGRisk of accident
ABS (Anti-lock Braking System), ESP ®
 (Electronic Stability
Program), BAS (Brake Assist), hill start assist and ESP ®
 trailer
stabilization are temporarily unavailable. The self-diagnosis might
not be finished, for example. In addition, the  ä, å
and  !  warning lamps light up in the instrument cluster.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example. 
XCarefully drive a suitable distance 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:
XDrive on carefully.XVisit a qualified specialist workshop.GRisk of accident
ABS, ESP ®
, BAS, hill start assist and trailer stabilization are
temporarily unavailable. The on-board voltage may be insufficient,
for example. In addition, the  ä, å  and !  warning lamps
light up in the instrument cluster.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
XDrive on carefully.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
XDrive on carefully.XVisit a qualified specialist workshop.Display messages181On-board computer and displaysBA 204.9 USA, CA Edition A 2011; 1; 6, en-USd2mwentsVersion: 3.0.3.62010-06-15T08:58:39+02:00 - Seite 181Z 

Display messagesPossible causes/consequences and M Solutions$ (USA only)
J (Canada only)
ABS and ESC 
Inoperative See 
Operator's ManualGRisk of accident
ABS, ESP ®
, BAS, hill start assist and ESP ®
 trailer stabilization are
unavailable due to a malfunction. In addition, the  ä, å
and  !  warning lamps light up in the instrument cluster.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
XDrive on carefully.XVisit a qualified specialist workshop.$ (USA only)
J (Canada only)
EBD, ABS, and ESC 
Inoperative See 
Operator's ManualGRisk of accident
EBD (Electronic Brake force Distribution), ABS, ESP ®
, BAS, hill
start assist and ESP ®
 trailer stabilization are unavailable due to a
malfunction. In addition, the  ä, å  and !  warning lamps
in the instrument cluster light up and a warning tone sounds.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
XDrive on carefully.XVisit a qualified specialist workshop immediately.#
Check Brake Pad 
WearThe brake pads/linings have reached their wear limit.XVisit a qualified specialist workshop.$ (USA only)
J (Canada only)
Release Park. BrakeYou are driving with the parking brake engaged. A warning tone
also sounds.XRelease the parking brake.$ (USA only)
J (Canada only)
Check Brake Fluid 
LevelGRisk of accident
There is insufficient brake fluid in the brake fluid reservoir.
Additionally, the red  $ (USA only)/  J (Canada only)
warning lamp lights up in the instrument cluster and a warning
tone sounds.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.XEngage the parking brake.XConsult a qualified specialist workshop.XDo not add brake fluid. This will not rectify the malfunction.182Display messagesOn-board computer and displays
BA 204.9 USA, CA Edition A 2011; 1; 6, en-USd2mwentsVersion: 3.0.3.62010-06-15T08:58:39+02:00 - Seite 182 

GWarning
Driving with the message Check Brake Fluid Level  displayed can result in an accident. Have
your brake system checked immediately.
Do not add brake fluid before checking the brake system. Overfilling the brake fluid reservoir can
result in spilling brake fluid on hot engine parts and the brake fluid catching fire. You can be
seriously burned.
Lights
i Display messages concerning LEDs:
This display message will only appear if all LEDs have failed.
Display messagesPossible causes/consequences and  M Solutionsb
Check Left 
Corner'g Lite
or
Right Corner'g LiteThe left or right-hand cornering light is faulty. XCheck whether you are permitted to change the bulb yourself
( Y  page 107).
or
XVisit a qualified specialist workshop.b
Check Left Low Beam
or
Check Right Low 
BeamThe left or right-hand low-beam headlamp is faulty. XCheck whether you are permitted to change the bulb yourself
( Y  page 107).
or
XVisit a qualified specialist workshop.b
Chk. Trailer Lt 
Tail Lamp
or
Chk. Trailer Rt 
Tail LampThe left or right-hand trailer tail light is faulty.XCheck whether you are permitted to change the bulb yourself.
or
XVisit a qualified specialist workshop.b
Check Trailer Lt. 
Turn Sig.
or
Chk. Trailer Rt 
Turn Sig.The left or right-hand trailer turn signal lamp is faulty.XCheck whether you are permitted to change the bulb yourself.
or
XVisit a qualified specialist workshop.b
Chk. Trailer Brake 
LampThe trailer brake lamp is faulty.XCheck whether you are permitted to change the bulb yourself.
or
XVisit a qualified specialist workshop.Display messages183On-board computer and displaysBA 204.9 USA, CA Edition A 2011; 1; 6, en-USd2mwentsVersion: 3.0.3.62010-06-15T08:58:39+02:00 - Seite 183Z 

Display messagesPossible causes/consequences and M Solutionsb
Turn Signal Rear 
Left
or
Chk. Rear Rt Turn 
SignalThe rear left-hand or rear right-hand turn signal is faulty.XCheck whether you are permitted to change the bulb yourself
( Y  page 107).
or
XVisit a qualified specialist workshop.b
Chk. Front Lt. 
Turn Signal
or
Front right 
indicatorThe front left-hand or front right-hand turn signal is faulty.XCheck whether you are permitted to change the bulb yourself
( Y  page 107).
or
XVisit a qualified specialist workshop.b
Check Left Mirror 
Signal
or
Check Right Mirror 
SignalThe turn signal in the left-hand and/or right-hand exterior mirror
is faulty.XCheck whether you are permitted to change the bulb yourself
( Y  page 107).
or
XVisit a qualified specialist workshop.b
Chk. Center Brake 
LampThe high-mounted brake lamp is faulty.XCheck whether you are permitted to change the bulb yourself
( Y  page 107).
or
XVisit a qualified specialist workshop.b
Chk. Lt. Tail 
+Brake Lmp.
or
Chk. Rt. Tail 
+Brake Lmp.The left or right-hand tail lamp/brake lamp is faulty.XCheck whether you are permitted to change the bulb yourself
( Y  page 107).
or
XVisit a qualified specialist workshop.b
Check Left High 
Beam
or
Check Right High 
BeamThe left or right-hand high beam is faulty. XCheck whether you are permitted to change the bulb yourself
( Y  page 107).
or
XVisit a qualified specialist workshop.184Display messagesOn-board computer and displays
BA 204.9 USA, CA Edition A 2011; 1; 6, en-USd2mwentsVersion: 3.0.3.62010-06-15T08:58:39+02:00 - Seite 184