2015 MERCEDES-BENZ S-Class Display

Engine
Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions ;
N
The yellow Check Engine warning lamp lights up while the engine is running.
There may be a malfunction, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignition system
R in the fuel system
The emission limit values may be exceeded and the engine may be in emer-
gency mode.
X Have the vehicle checked as soon as possible at a qualified specialist work-
shop.
i In some states, you must immediately visit a qualified specialist workshop
as soon as the yellow Check Engine warning lamp lights up. This is due to the
legal requirements in effect in these states. If in doubt, check whether such legal regulations apply in the state in which you are currently driving. 8
N
The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel level has dropped into the reserve range.
X Refuel at the nearest gas station. 8
N
The yellow reserve fuel warning lamp flashes while the vehicle is in motion.
In addition, the ;Check Engine warning lamp may light up.
The fuel system pressure is too low. The fuel filler cap is not closed correctly or the fuel system is leaking.
X Check that the fuel filler cap is correctly closed.
X If the fuel filler cap is not correctly closed: close the fuel filler cap.
X If the fuel filler cap is closed: visit a qualified specialist workshop. Warning and indicator lamps in the instrument cluster
363On-board computer and displays Z

Warning/
indicator
lamp
N
N Signal type
Possible causes/consequences and M MSolutions ?
N
The red coolant warning lamp lights up while the engine is running and the
coolant temperature gage is at the start of the bar display.
The temperature sensor for the coolant temperature gage is defective.
The coolant temperature is no longer being monitored. There is a risk of engine
damage if the coolant temperature is too high.
X Pull over and stop the vehicle safely and switch off the engine, 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. 364
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions ?
N
The red coolant warning lamp comes on while the engine is running.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator may be blocked
or the electric engine radiator fan may be malfunctioning.
The coolant is too hot and the engine is no longer being cooled sufficiently.
X Observe the additional display messages in the multifunction display.
X Pull over and stop the vehicle safely and switch off the engine, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 220).
X Leave the vehicle and keep a safe distance from the vehicle until the engine
has cooled down.
X Check the coolant level and add coolant, observing the warning notes
(Y page 408).
X If you need to add coolant more often than usual, have the engine coolant
system checked.
X Make sure that the air supply to the engine radiator is not blocked, e.g. by
snow, slush or ice.
X Do not start the engine again until the coolant temperature is below 257 ‡
(125 †). Otherwise, the engine could be damaged.
X Drive to the nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in mountainous
terrain, and stop-and-go traffic. ?
N
The red coolant warning lamp comes on while the engine is running. A
warning tone also sounds.
The coolant temperature has exceeded 255 ‡ (124 †). The airflow to the
engine radiator may be blocked or the coolant level may be too low.
G WARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can cause some fluids which may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can also cause serious burns which can
occur just by opening the hood.
There is a risk of injury.
X Observe the additional display messages in the multifunction display.
X Pull over and stop the vehicle safely and switch off the engine, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 220).Warning and indicator lamps in the instrument cluster
365On-board computer and displays Z

Warning/
indicator
lamp
N
N Signal type
Possible causes/consequences and M MSolutions X
Leave the vehicle and keep a safe distance from the vehicle until the engine
has cooled down.
X Check the coolant level and add coolant, observing the warning notes
(Y page 408).
X If you need to add coolant more often than usual, have the engine coolant
system checked.
X Make sure that the air supply to the engine radiator is not blocked, e.g. by
snow, slush or ice.
X At coolant temperatures below 257 ‡(125 †), you can continue driving to
the nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in mountainous
terrain, and stop-and-go traffic. Hybrid system
Warning/
indicator
lamp
N
N Signal type
Possible causes/consequences and M MSolutions é
N
The yellow RBS (recuperative brake system) warning lamp is on. In addition,
there may be a warning tone.
G Risk of accident
RBS is malfunctioning. Pedal travel may be longer than usual and braking
performance may be affected. The automatic engine switch-off function may also be deactivated.
X Observe the messages in the multifunction display (Y page 316).
X Drive on carefully.
X Visit a qualified specialist workshop. 366
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions $
N
The red brake system warning lamp is on. A warning tone also sounds.
G Risk of accident
RBS is malfunctioning. Pedal travel may be longer than usual and braking
performance may be affected.
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 circumstan-
ces.
X Consult a qualified specialist workshop immediately.
X Observe the additional display messages in the multifunction display. Driving systems
Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions ·
N
The red distance warning lamp lights up while the vehicle is in motion. A
warning tone also sounds.
You are approaching a vehicle or a stationary obstacle in your line of travel at too high a speed.
X Be prepared to brake immediately.
X Pay careful attention to the traffic situation. You may have to brake or take
evasive action.
Further information on PRE ‑SAFE®
Brake (Y page 84).
For further information about the distance warning function of COLLISION
PREVENTION ASSIST PLUS, see (Y page 80). Warning and indicator lamps in the instrument cluster
367On-board computer and displays Z

Tires
Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions h
N
The yellow tire pressure monitor warning lamp (pressure loss/malfunction)
is lit.
The tire pressure monitor has detected a loss of pressure in at least one of the
tires.
G WARNING
With tire pressures which are too low, there is a risk of the following hazards:
R they may burst, especially as the load and vehicle speed increase.
R they may wear excessively and/or unevenly, which may greatly impair tire
traction.
R the driving characteristics, as well as steering and braking, may be greatly
impaired.
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 as you do so.
X Secure the vehicle against rolling away (Y page 220).
X Observe the additional display messages in the multifunction display.
X Check the tires and, if necessary, follow the instructions for a flat tire
(Y page 423).
X Check the tire pressure (Y page 449).
X If necessary, correct the tire pressure. h
N
The yellow tire pressure monitor warning lamp (pressure loss/malfunction)
flashes for approximately one minute and then remains lit.
The tire pressure monitor is faulty.
G WARNING
The system is possibly unable to recognize or register low tire pressure.
There is a risk of an accident.
X Observe the additional display messages in the multifunction display.
X Visit a qualified specialist workshop. 368
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Vehicle
Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions Ð
N
The red power steering warning lamp is lit while the engine is running.
The power steering is malfunctioning.
A warning tone also sounds.
G WARNING
You will need to use more force to steer.
There is a risk of an accident. X Check whether you are able to apply the extra force required.
X If you are able to steer safely: carefully drive on to a qualified specialist
workshop.
X If you are unable to steer safely: do not drive on. Contact the nearest
qualified specialist workshop. Warning and indicator lamps in the instrument cluster
369On-board computer and displays Z

Shortly after successfully registering with the
mbrace service, a user ID and password will
be sent to you by mail. You can use this pass-
word to log onto the mbrace area under "Own- ers Online" at http://www.mbusa.com .
The system is available if:
R it has been activated and is operational
R the corresponding mobile phone network is
available for transmitting data to the Cus-
tomer Center
R a service subscription is available
R the starter battery is sufficiently charged
Determining the location of the vehicle on a
map is only possible if:
R GPS reception is available.
R the vehicle position can be forwarded to
the Customer Assistance Center.
The mbrace system To adjust the volume during a call, proceed as
follows:
X Press the WorX button on the mul-
tifunction steering wheel.
or
X Use the COMAND volume control.
The system offers various services, e.g.: R Automatic and manual emergency call
R Roadside Assistance call
R MB Info call
You can find information and a description of all available features under "Owners Online"
at http://www.mbusa.com.
System self-test After you have switched on the ignition, the
system carries out a self-diagnosis. A malfunction in the system has been detec-
ted if one of the following occurs:
R The indicator lamp in the SOS button does
not come on during the system self-test.
R The indicator lamp in the FRoadside
Assistance button does not light up during
self-diagnosis of the system.
R The indicator lamp in the ïMB Info call
button does not light up during self-diag-
nosis of the system.
R The indicator lamp in one or more of the
following buttons continues to light up red
after the system self-diagnosis:
- SOS button
- F Roadside Assistance call button
- ï MB Info call button
R The Inoperative
Inoperative or theService Not Service Not
Activated
Activated message appears in the multi-
function display after the system self-diag-
nosis.
If a malfunction is indicated as outlined
above, the system may not operate as expec-
ted. In the event of an emergency, help will
have to be summoned by other means.
Have the system checked at the nearest
authorized Mercedes-Benz Center or contact the following service hotlines:
Mercedes-Benz Customer Assistance Center
at 1-800-FOR-MERCede s (1-800-367-6372)
or 1-866-990-9007 390
FeaturesSto
wage an d features