2015 MERCEDES-BENZ S-Class coolant

!
A display message is shown if the coolant
temperature is too high.
If the coolant temperature is above 257 ‡
(125 †) do not drive any further. The
engine will otherwise be damaged.
The coolant temperature is displayed in the
lower section of the tachometer (Y page 35).
Hybrid and PLUG-IN HYBRID vehicles: the
multifunction display shows the coolant tem-
perature in the Coolant
Coolant submenu
(Y page 307).
Under normal operating conditions and with
the specified coolant level, the coolant tem-
perature may rise to 255 ‡ (124 †). Outside temperature display
You should pay special attention to road con-
ditions when temperatures are around freez-
ing point.
Bear in mind that the outside temperature
display indicates the temperature measured
and does not record the road temperature.
The outside temperature display is in the mul- tifunction display (Y page 296).
Changes in the outside temperature are dis-
played after a short delay. Operating the on-board computer
:
Multifunction display
; Right control panel
= Left control panel
X To activate the on-board computer: turn
the SmartKey to position 1in the ignition
lock.
You can control the multifunction display and
the settings in the on-board computer using
the buttons on the multifunction steering
wheel.
Left control panel ò R
Calls up the main menu 9
: Press briefly:
R Scrolls in lists
R Selects a menu or function
R In the Radio Radio/Media Mediamenu:
opens the track or station list
and selects an audio track or
video scene
R In the Telephone Telephone menu:
switches to the phone book and
selects a name or a telephone
number Displays and operation
295On-board computer and displays Z

X
Press the 6button to switch to the
redial memory.
X Press the :or9 button to select the
desired name or number.
X Press the 6ora button to start dial-
ing.
or X To exit the redial memory: press the
~ or% button. Assistance graphic menu
X
Use ò on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Assistance
AssistanceInfo
Info
Display
Display menu.
X Confirm by pressing aon the steering
wheel.
The multifunction display shows the
DISTRONIC PLUS distance display in the
assistance graphic.
X Press :to display the ATTEN-
TION ASSIST assessment.
The assistance graphic displays the status of and information from the following driving
systems or driving safety systems:
R DISTRONIC PLUS (Y page 237)
R Spotlight function of Night View Assist Plus
(Y page 312)
R Distance warning and the autonomous
braking function COLLISION PREVENTION
ASSIST PLUS (Y page 79)
R PRE-SAFE ®
Brake (Y page 84) R
Active Blind Spot Assist (Y page 270)
R ATTENTION ASSIST (Y page 264)
R Active Lane Keeping Assist (Y page 273) Maintenance menu
Introduction In the
Service Service menu, you have the following
options:
R Calling up display messages in message
memory (Y page 316)
R Restarting the tire pressure loss warning
system (Y page 452)
R Checking the tire pressure electronically
(Y page 449)
R Calling up the service due date
(Y page 410).
R Displaying the coolant temperature (hybrid
or PLUG-IN HYBRID vehicles)
(Y page 307)
R Checking the engine oil level using the on-
board computer (Y page 407) (S 600, S
600 MAYBACH and S 65 AMG only)
Displaying the coolant temperature The
Coolant Coolant submenu is only present on
hybrid or plug-in hybrid vehicles.
X Use ò on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Service Servicemenu.
X Confirm by pressing aon the steering
wheel. Menus and submenus
307On-board computer and displays Z

X
Use : or9 to select the Coolant
Coolant
submenu.
X Press ato confirm the selection.
The multifunction display shows the cool-
ant temperature in a bar display. Settings menu
Introduction In the
Settings
Settings menu, you have the following
options:
R Changing assistance settings
(Y page 308)
R Changing hybrid settings (PLUG-IN hybrid
vehicles) (Y page 310)
R Changing head-up display settings
(Y page 311)
R Changing the light settings (Y page 312)
R Changing the instrument cluster settings
(Y page 312)
R Restoring the factory settings
(Y page 314)
Assistance submenu Deactivating/activating ESP
®
Observe the "Important safety notes" section
in the description of ESP ®
(Y page 82). G
WARNING
If you deactivate ESP ®
, ESP ®
no longer sta-
bilizes the vehicle. There is an increased risk
of skidding and an accident. Only deactivate ESP
®
in the situations descri-
bed in the following.
It may be best to deactivate ESP ®
in the fol-
lowing situations:
R when using snow chains
R in deep snow
R on sand or gravel
For further information about ESP ®
, see
(Y page 81).
X Start the engine.
X Use ò on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Settings
Settings menu.
X Confirm by pressing aon the steering
wheel.
X Use : or9 to select the DriveAs‐ DriveAs‐
sist sist submenu.
X Press ato confirm.
X Press the :or9 button to select
ESP
ESP.
X Press ato confirm.
The current selection is displayed.
X To activate/deactivate: press thea
button again.
ESP ®
is deactivated if the åwarning lamp
in the instrument cluster lights up continu-
ously when the engine is running.
If the ÷ warning lamp lights up continu-
ously, ESP ®
is not available due to a malfunc-
tion.
Observe the information on warning lamps
(Y page 360).
Observe the information on display messages
(Y page 317).
Automatic activation of Night View Assist Plus
X Use ò on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Settings Settingsmenu. 308
Menus and submenusOn-board computer and displays

X
Use ò on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Settings
Settingsmenu.
X Confirm by pressing aon the steering
wheel.
X Press the :or9 button to select the
Instrument Cluster
Instrument Cluster submenu.
X Press ato confirm.
X Press the :or9 button to select the
Display Unit Speed-/Odometer
Display Unit Speed-/Odometer func-
tion.
You will see the selected setting: km
km or
miles miles.
X Press the abutton to save the setting.
The selected unit of measurement for dis-
tance applies to:
R Speedometer
R Digital speedometer in the Trip
Trip menu
R Additional speedometer in the status area
on the multi-function display
The unit in the additional speedometer is
displayed inversely to the selected dis-
tance unit.
R Odometer and the trip odometer
R Trip computer
R Current consumption and the range
R Navigation instructions in the Navi
Navi menu
R Cruise Control
R SPEEDTRONIC
R DISTRONIC PLUS
R ASSYST PLUS service interval display
Selecting the permanent display function
All vehicles except PLUG-IN HYBRID vehi-
cles: with the Permanent Display
Permanent Display function
you can switch on the outside temperature in the status bar of the multifunction display.
PLUG-IN HYBRID vehicles: with thePerma‐ Perma‐
nent
nent Display
Display function you can switch on the
following displays in the status bar of the mul-
tifunction display. R
outside temperature
R coolant temperature (PLUG‑IN HYBRID
vehicles)
R the total electric range (PLUG-IN HYBRID
vehicles)
X Use ò on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Settings
Settings menu.
X Confirm by pressing aon the steering
wheel.
X Press the :or9 button to select the
Instrument Cluster Instrument Cluster submenu.
X Press ato confirm.
X Press :or9 to select the Perma‐
Perma‐
nent Display
nent Display function.
X Press ato confirm.
All vehicles except PLUG-IN HYBRID
vehicles: the current setting for Outside Outside
Temperature
Temperature is shown.
Only PLUG-IN HYBRID vehicles: the cur-
rent selection of Outside Temperature
Outside Temperature,
Coolant Temperature
Coolant Temperature orElectric
Electric
Range
Range is displayed.
X Only PLUG-IN HYBRID vehicles: select
the desired option with :or9.
X To change the setting: pressa.
Switching the additional speedometer
on/off
Use the Additional Speedometer Additional Speedometer function
to choose whether the status area in the mul- tifunction display shows the speed digitally.
X Use ò on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Settings Settingsmenu.
X Confirm by pressing aon the steering
wheel.
X Press the :or9 button to select the
Instrument Cluster
Instrument Cluster submenu.
X Press ato confirm. Menus and submenus
313On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Adaptive Highbeam
Adaptive Highbeam
Assist Assist
Plus
PlusInoper‐
Inoper‐
ative
ative Adaptive Highbeam Assist Plus is faulty.
X Visit a qualified specialist workshop. Adaptive Highbeam
Adaptive Highbeam
Assist Plus Cur‐ Assist Plus Cur‐
rently rently
Unavailable
Unavailable
See
See Operator's
Operator's Man‐
Man‐
ual
ual Adaptive Highbeam Assist Plus is deactivated and temporarily
inoperative. Possible causes are:
R the windshield in the camera's field of vision is dirty.
R visibility is impaired due to heavy rain, snow or fog.
X Clean the windshield.
If the system detects that the camera is fully operational, display
message Adaptive Adaptive Highbeam
HighbeamAssist
AssistPlus
PlusAvailable
Available Again
Again
is displayed.
Adaptive Highbeam Assist Plus is operational again. Engine
Display messages
Possible causes/consequences and
M MSolutions +
Check Coolant Check Coolant
Level See Opera‐ Level See Opera‐
tor's Manual tor's Manual The coolant level is too low.
! Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Add coolant, observing the warning notes before doing so
(Y page 408).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop. ? ? The fan motor is faulty.
X At coolant temperatures below 257 ‡ (125 †), drive to the
nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in moun-
tainous terrain, and stop-and-go traffic. 336
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions ?
Coolant Too Hot Coolant Too Hot
Stop Vehicle Turn Stop Vehicle Turn
Engine Off Engine Off The coolant is too hot.
A warning tone also sounds.
G WARNING
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 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 Wait until the engine has cooled down.
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 display message goes out
and the coolant temperature is below 257 ‡ (125 †). Other-
wise, the engine could be damaged.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 255 ‡ (124 †). #
See See
Operator's
Operator's Man‐
Man‐
ual
ual The battery is not being charged.
A warning tone also sounds.
Possible causes are:
R a defective alternator
R defective power electronics (PLUG-IN HYBRID vehicles)
R a torn poly-V-belt
R a malfunction in the electronics
! Do not continue driving. The engine could otherwise overheat.
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 Consult a qualified specialist workshop. Display
messages
337On-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