2015 MERCEDES-BENZ S-Class light

Display messages
Possible causes/consequences and
M
MSolutions $(USA
only)J
(Canada
only)
Check Brake Fluid Check Brake Fluid
Level Level There is not enough brake fluid in the brake fluid reservoir.
In addition, the
$(USA only)/ J(Canada only) warning
lamp lights up in the instrument cluster and a warning tone
sounds.
G WARNING
The braking effect may be impaired.
There is a risk of an accident. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 220).
X Consult a qualified specialist workshop.
X Do not add brake fluid. This does not correct the malfunction. #
Check Brake Pad Check Brake Pad
Wear Wear The brake pads/linings have reached their wear limit.
USA only: the red
$brake system warning lamp also lights up
while the engine is running.
X Visit a qualified specialist workshop. G
Inoperative Inoperative One or more main features of the mbrace system are malfunc-
tioning.
X Have the mbrace system checked immediately at a qualified
specialist workshop. PRE-SAFE Inopera‐ PRE-SAFE Inopera‐
tive See Opera‐ tive See Opera‐
tor's Manual tor's Manual
Important functions of PRE-SAFE
®
have failed. All other occupant
safety systems, e.g. air bags, remain available.
X Visit a qualified specialist workshop immediately. 324
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions The seat belt buckle extender on the right or left of the rear com-
partment is not in the predefined position. There is not enough belt slack in the system.
G WARNING
If the seat belt buckle extender is not in the predefined position,
the seat belt cannot provide the intended level of protection.
There is an increased risk of injury. X Loosen the seat belt.
X Repeat the seat belt fastening procedure. The seat belt buckle extender on the right or left of the rear com-
partment is not in the predefined position. The assistance meas-
ures specified have been carried out. There is still a malfunction.
G WARNING
If the seat belt buckle extender is not in the predefined position,
the seat belt cannot provide the intended level of protection.
There is an increased risk of injury. X Visit a qualified specialist workshop. 6
SRS Malfunction SRS Malfunction
Service Required Service Required The restraint system is faulty. The
6warning lamp also 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 Visit a qualified specialist workshop.
For further information about the restraint system, see
(Y page 49). 6
Front Front
Left
LeftMalfunc‐
Malfunc‐
tion Service
tion Service
Required Required orFront
Front
Right Malfunction
Right Malfunction
Service Required Service Required The restraint system has malfunctioned at the front on the left or
right. The 6warning lamp also lights up in the instrument clus-
ter.
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 Visit a qualified specialist workshop. 328
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions 6
Rear Left Malfunc‐ Rear Left Malfunc‐
tion Service tion Service
Required Required
orRear
Rear
Right Malfunction
Right Malfunction
Service Required Service Required The restraint system has malfunctioned at the rear on the left or
right. The 6warning lamp also lights up in the instrument clus-
ter.
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 Visit a qualified specialist workshop. 6
Rear Left Malfunc‐ Rear Left Malfunc‐
tion Service tion Service
Required Required
orRear
Rear
Right Malfunction
Right Malfunction
Service Required Service Required G
WARNING
If the seat belt buckle extender is not in the predefined position,
the seat belt cannot provide the intended level of protection.
There is an increased risk of injury. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Perform the specified assistance measures when display mes-
sage Check Left Rear Belt See Operator's Manual Check Left Rear Belt See Operator's Manual or
Check
Check Right
RightRear
RearBelt
Belt See
SeeOperator's
Operator's Manual
Manualis shown
(Y page 327).
If the display message does not disappear:
X Visit a qualified specialist workshop immediately. 6
Rear Center Mal‐ Rear Center Mal‐
function Service function Service
Required Required The restraint system has malfunctioned at the rear center. The
6 warning lamp also 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 Visit a qualified specialist workshop. Display
messages
329On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions 6
Left Side Curtain Left Side Curtain
Airbag Airbag
Malfunction
Malfunction
Service Required
Service Required
or Right Side Cur‐ Right Side Cur‐
tain Airbag Mal‐
tain Airbag Mal‐
function Service function Service
Required Required There is a malfunction in the left-hand or right-hand window cur-
tain air bag. The
6warning lamp also lights up in the instrument
cluster.
G WARNING
The left or right window curtain air bag may either be triggered
unintentionally or, in the event of an accident, may not be trig-
gered.
There is an increased risk of injury. X Visit a qualified specialist workshop. 330
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions Front Passenger
Front Passenger
Airbag Disabled Airbag Disabled
See See
Operator's
Operator's Man‐
Man‐
ual
ual The front-passenger air bag is deactivated during the journey, even
though:
R an adult
or
R a person of the corresponding stature is on the front-passenger
seat
If additional forces are applied to the seat, the system may inter-
pret the occupant's weight as lower than it actually is.
G WARNING
The front-passenger air bag does not deploy during an accident.
There is an increased risk of injury. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 220).
X Switch the ignition off.
X Have the occupant get out of the vehicle.
X Keep the seat unoccupied, close the front-passenger door and
switch on the ignition.
X Observe the PASSENGER AIR BAG indicator lamps in the center
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R the PASSENGER AIR BAG OFF and PASSENGER AIR BAG ON
indicator lamps must light up simultaneously for approx-
imately six seconds.
R the PASSENGER AIR BAG OFF indicator lamp must then light
up and remain lit. If the indicator lamp is on, OCS has disabled the front-passenger air bag (Y page 60).
R the display messages Front FrontPassenger
Passenger Airbag
AirbagEnabled
Enabled
See Operator's Manual
See Operator's Manual orFront Passenger Airbag
Front Passenger Airbag
Disabled
Disabled See
SeeOperator's
Operator's Manual
Manualmust not appear in the
multifunction display.
X Wait for a period of at least 60 seconds until the necessary sys-
tem checks have been completed.
X Make sure that the display messages do not appear in the mul-
tifunction display.
If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the PASSENGER AIR BAG OFF or ON
indicator lamp remains lit or goes out depends on how OCS clas- sifies the occupant.
If the conditions are not fulfilled, the system is not operating cor-
rectly. Display
messages
331On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions X
Visit a qualified specialist workshop immediately.
For further information about the Occupant Classification System, see (Y page 60). Front Passenger
Front Passenger
Airbag Airbag
Enabled
Enabled See
See
Operator's Manual
Operator's Manual The front-passenger air bag is enabled during the journey, even
though:
R a child, a small adult or an object weighing less than the sys-
tem's weight threshold is located on the front-passenger seat
or
R the front-passenger seat is unoccupied
The system may detect objects or forces applying additional
weight on the seat.
G WARNING
The air bag may deploy unintentionally.
There is an increased risk of injury. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 220).
X Switch the ignition off.
X Open the front-passenger door.
X Remove the child and the child restraint system from the front-
passenger seat.
X Make sure that there are no objects on the seat adding to the
weight.
The system may otherwise detect the additional weight and
interpret the seat occupant's weight as greater than it actually
is.
X Keep the seat unoccupied, close the front-passenger door and
switch on the ignition.
X Observe the PASSENGER AIR BAG indicator lamps in the center
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R the PASSENGER AIR BAG OFF and PASSENGER AIR BAG ON
indicator lamps must light up simultaneously for approx-
imately six seconds.
R the PASSENGER AIR BAG OFF indicator lamp must then light
up and remain lit. If the indicator lamp is on, OCS (Occupant
Classification System) has deactivated the front-passenger
air bag (Y page 60).
R the display messages Front FrontPassenger
Passenger Airbag
AirbagEnabled
Enabled
See Operator's Manual
See Operator's Manual orFront Passenger Airbag
Front Passenger Airbag 332
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions Disabled
Disabled
See
SeeOperator's
Operator's Manual
Manualmust not appear in the
multifunction display.
X Wait for a period of at least 60 seconds until the necessary sys-
tem checks have been completed.
X Make sure that the display messages do not appear in the mul-
tifunction display.
If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the PASSENGER AIR BAG OFF or ON
indicator lamp remains lit or goes out depends on how OCS clas- sifies the occupant.
If the conditions are not fulfilled, the system is not operating cor-rectly.
X Visit a qualified specialist workshop immediately.
For further information about the Occupant Classification System, see (Y page 60). Lights
i Vehicles with LED bulbs in the lamp units:
The display message for the corresponding light will only appear if all the LEDs have failed. Display messages
Possible causes/consequences and
M MSolutions b
Check Left Corner‐ Check Left Corner‐
ing Light ing Light
orCheck
Check
Right Cornering
Right Cornering
Light Light The left or right-hand cornering light is defective.
X Visit a qualified specialist workshop. b
Check Left Low Check Left Low
Beam Beam
orCheck
Check
Right Low Beam
Right Low Beam The left or right-hand low-beam headlamp is defective.
X Visit a qualified specialist workshop. b
Check Rear Left Check Rear Left
Turn Signal Turn Signal
or
Check Rear Right
Check Rear Right
Turn Signal Turn Signal The rear left-hand or rear right-hand turn signal is defective.
X Visit a qualified specialist workshop. Display
messages
333On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions b
Check Front Left Check Front Left
Parking Lamp Parking Lamp
or
Check Front Right
Check Front Right
Parking Lamp Parking Lamp The front left or front right parking or standing lamp is defective.
X Visit a qualified specialist workshop. b
Backup Light Backup Light The left or right-hand backup lamp is defective.
X Visit a qualified specialist workshop. b
Check Front Left Check Front Left
Sidemarker Lamp Sidemarker Lamp
or
Check Front Right
Check Front Right
Sidemarker Lamp Sidemarker Lamp The front left-hand or front right-hand side marker lamp is faulty.
X Visit a qualified specialist workshop. b
Check Rear Left Check Rear Left
Sidemarker Lamp Sidemarker Lamp
or
Check Rear Right
Check Rear Right
Sidemarker Lamp Sidemarker Lamp The rear left-hand or rear right-hand side marker lamp is faulty.
X Visit a qualified specialist workshop. b
Check Check
Left
LeftDaytime
Daytime
Running Light
Running Light or
Check Right Day‐
Check Right Day‐
time Running Light time Running Light The left or right-hand daytime running lamp is faulty.
X Visit a qualified specialist workshop. b
Active Headlamps Active Headlamps
Inoperative Inoperative The active light function is defective.
X Visit a qualified specialist workshop. b
Malfunction See Malfunction See
Operator’s Manual Operator’s Manual The exterior lighting is defective.
X Visit a qualified specialist workshop. b
Auto Auto
Lamp
LampFunction
Function
Inoperative
Inoperative The light sensor is defective.
X Visit a qualified specialist workshop. b
Switch Off Lights Switch Off Lights The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X Turn the light switch to Ã. Display
messages
335On-board computer and displays Z