2014 MERCEDES-BENZ S-CLASS COUPE lock

Outside temperature display
You should pay special attention to road con-
ditions when temperatures are around the
freezing 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 244).
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 key 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 a main menu 9
: Press briefly:
R Scrolls through 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 9
: Press and hold:
R Rapid scrolling in all lists
R In the Radio Radio/ Media
Mediamenu:
selects a station, audio track or
video scene using rapid scrolling
R In the Telephone Telephone menu: starts
rapid scrolling if the phone book is open a R
In all menus: confirms the selec-
ted entry in the list
R In the Radio
Radio/Media Mediamenu:
opens the list of available radio
sources/media
R In the Telephone
Telephone menu:
switches to the phone book and
starts dialling the selected num-
ber ñ
Switches off LINGUATRONIC; see
the separate operating instructions Displays and operation
243On-board computer and displays Z

X
To call up the menu list in display
panel ;:press the òbutton on the
steering wheel.
Display panel ;shows the selected menu
or submenu and display messages. Head-up display
General notes The head-up display projects information
from the navigation system and the driver
assistance system above the dashboard into
the driver's field of vision.
A requirement for the display of the contents
is that each of the functions (navigation,
DISTRONIC PLUS, Traffic Sign Assist) is avail- able in the vehicle and is switched on.
The head-up display allows the driver to see
all of the information without having to take
his eyes off the road.
Important safety notes The head-up display is only an aid and is not a
substitute for attentive driving.
Speed limits and overtaking restrictions are
not always correctly displayed. Traffic signs
always have priority over the Traffic Sign
Assist display.
The visibility of the head-up display is influ-
enced by the following conditions:
R the driver's seat position
R the positioning of the display image
R the general light conditions
R sunglasses with polarisation filters
R wet road surfaces
R blocking of sunlight by objects on the dis-
play cover
In the event of extreme sunlight, sections of
the display may fade. This can be reversed by
switching the head-up display off and on
again.
i Vehicles with the head-up display are
equipped with a special windscreen. Should repairs be necessary, have the
windscreen replaced at a qualified special-
ist workshop.
Displays and operation Switching the head-up display on/off
X
Press button :.
When the head-up display is switched on,
the display appears in the driver's field of
vision.
AMG vehicles: pressing button :switches
from the standard to the AMG display and
pressing button :again turns off the
Head-up display. Displays and operation
245On-board computer and displays Z

Safety systems
Display messages
Possible causes/consequences and
M
MSolutions !÷
currently unavail‐ currently unavail‐
able See Owner's able See Owner's
Manual Manual ABS (Anti-lock Brake System), ESP
®
(Electronic Stability Program),
BAS (Brake Assist System), PRE‑ SAFE®
, HOLD function, hill start
assist, Crosswind Assist, adaptive brake lights, STEER CONTROL,
Active Lane Keeping Assist and Active Blind Spot Assist are tem-
porarily unavailable.
BAS PLUS with Cross-Traffic Assist, PRE‑SAFE ®
Brake, PRE‑ SAFE®
PLUS and COLLISION PREVENTION ASSIST PLUS may also have
failed.
In addition, the ÷and! warning lamps light up in the
instrument cluster.
ATTENTION ASSIST is 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.
The steerability and braking characteristics may be severely affec-ted. The braking distance may increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Drive on carefully.
Carefully drive on a suitable stretch of road, making slight steer-
ing movements at a speed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X Drive on carefully.
X Visit a qualified specialist workshop. !÷
inoperative See inoperative See
Owner's Manual Owner's Manual ABS, ESP
®
, BAS, PRE‑SAFE ®
, HOLD function, hill start assist,
Crosswind Assist, adaptive brake lights, STEER CONTROL, Active Lane Keeping Assist and Active Blind Spot Assist are unavailable
due to a malfunction.
BAS PLUS with Cross-Traffic Assist, PRE‑SAFE ®
Brake, PRE‑ SAFE®
PLUS and COLLISION PREVENTION ASSIST PLUS may also have
failed.
In addition, the J,÷and! warning lamps may light up
in the instrument cluster. 266
Display messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions ATTENTION ASSIST is 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 steerability and braking characteristics may be severely affec- ted. The braking distance may increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. ÷
inoperative See inoperative See
Owner's Manual Owner's Manual ESP
®
, BAS, PRE ‑SAFE®
, HOLD function, Hill Start assist, Cross-
wind Assist, adaptive brake lights, STEER CONTROL, Active Lane
Keeping Assist and Active Blind Spot Assist are unavailable due to
a malfunction.
BAS PLUS with Cross-Traffic Assist, PRE‑ SAFE®
Brake, PRE ‑SAFE®
PLUS and COLLISION PREVENTION ASSIST PLUS may also have
failed.
The ÷ warning lamp also lights up in the instrument cluster.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed above.
The braking distance may thus increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Drive on carefully.
X Visit a qualified specialist workshop. Display
messages
267On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions ÷
currently unavail‐ currently unavail‐
able See Owner's able See Owner's
Manual Manual ESP
®
, BAS, PRE ‑SAFE®
, HOLD function, hill start assist, Crosswind
Assist, adaptive brake lights, STEER CONTROL, Active Lane Keep- ing Assist and Active Blind Spot Assist are unavailable due to a
malfunction.
BAS PLUS with Cross-Traffic Assist, PRE ‑SAFE®
Brake, PRE ‑SAFE®
PLUS and COLLISION PREVENTION ASSIST PLUS may also have
failed.
The ÷ warning lamp also lights up in the instrument cluster.
The self-diagnosis function, for example, may not be complete.
ATTENTION ASSIST is 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 may thus increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Carefully drive on a suitable stretch of road, making slight steer-
ing movements at a speed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X Drive on carefully.
X Visit a qualified specialist workshop. 268
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions T!
÷
inoperative See inoperative See
Owner's Manual Owner's Manual EBD (electronic brake force distribution), ABS, ESP
®
, BAS,
PRE ‑SAFE ®
, HOLD function, hill start assist, Crosswind Assist,
adaptive brake lights, STEER CONTROL, Active Lane Keeping
Assist and Active Blind Spot Assist are unavailable due to a mal-
function.
BAS PLUS with Cross-Traffic Assist, PRE‑ SAFE®
Brake, PRE ‑SAFE®
PLUS and COLLISION PREVENTION ASSIST PLUS may also have
failed.
In addition, the ÷and! warning lamps light up in the
instrument cluster and a warning tone sounds.
G WARNING
The brake system continues to function normally, but without the functions listed above. The front and rear wheels could therefore
lock, for example, if you brake hard.
The steerability and braking characteristics may be severely affec- ted. The braking distance may increase in an emergency braking
situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. !
Release parking Release parking
brake brake The red
!indicator lamp flashes and a warning tone sounds. A
condition for automatic release of the electric parking brake is not
fulfilled (Y page 180).
You are driving with the electric parking brake applied.
X Release the electric parking brake manually. The red
!indicator lamp flashes and a warning tone sounds.
You are making an emergency stop using the electric parking
brake (Y page 180). !
Parking brake See Parking brake See
Owner's Manual Owner's Manual The yellow
!warning lamp lights up.
The electric parking brake is malfunctioning.
To apply:
X Switch the ignition off.
X Press the electric parking brake handle for at least ten seconds.
X Shift the transmission to P.
X Consult a qualified specialist workshop. Display
messages
269On-board computer and displays Z

Engine
Display messages
Possible causes/consequences and
M
MSolutions +
Top Top
up
upcoolant
coolant See
See
Owner’s Manual
Owner’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 Top up the coolant, observing the warning notes before doing so
(Y page 340).
X If the coolant needs topping up 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 125 †, drive to the nearest
qualified specialist workshop.
X Avoid putting the engine under heavy load as you do so, e.g.
driving in mountainous terrain and stop-start traffic. ?
Coolant Stop vehi‐ Coolant Stop vehi‐
cle Switch engine cle Switch engine
off off The coolant is too hot.
A warning tone also sounds.
G WARNING
Never drive with an overheated engine. Driving when your engine is overheated can cause some fluids which may have leaked into
the engine compartment to catch fire.
In addition, steam from an overheated engine can cause serious
burns, which can occur just by opening the bonnet.
There is a risk of injury.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Secure the vehicle to prevent it from rolling away (Y page 178).
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 frozen slush.
X Do not start the engine again until the display message goes out
and the coolant temperature is below 125 †. The engine may
otherwise 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 124 †. 282
Display messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions M
M The bonnet is open. A warning tone also sounds.
G WARNING
The open bonnet may then block your view when the vehicle is in
motion.
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.
X Secure the vehicle against rolling away (Y page 178).
X Close the bonnet. Active bonnet mal‐ Active bonnet mal‐
function See Own‐ function See Own‐
er's Manual er's Manual The active bonnet (pedestrian protection) is not active due to a
malfunction or because it has already been triggered.
X Visit a qualified specialist workshop. C C At least one door is open. A warning tone also sounds.
X Close all doors. _
Front left seat Front left seat
backrest not backrest not
locked locked
orFront
Front
right seat back‐
right seat back‐
rest not locked
rest not locked The driver's or front-passenger seat backrest is not engaged. A
warning tone also sounds.
X Push the backrest back until it engages. &
inoperative Bat‐ inoperative Bat‐
tery low tery low The on-board voltage is too low. The auxiliary heating (Y
page 148)
has switched itself off. The auxiliary heating cannot be switched
on.
X Drive for a considerable distance.
The battery charges. The auxiliary heating is operational again as
soon as the on-board electrical system voltage is sufficient. &
inoperative inoperative
Refuel
Refuel
vehicle
vehicle There is too little fuel in the fuel tank. The auxiliary heating cannot
be switched on (Y page 148).
X Refuel at the nearest filling station. &
inoperative See inoperative See
Owner's Man. Owner's Man. The auxiliary heating is temporarily malfunctioning or faulty.
X When the vehicle is on a level surface and the engine has cooled
down, make up to four attempts to switch on the auxiliary heat- ing, waiting several minutes between each attempt
(Y page 148).
X If the auxiliary heating does not switch on, consult a qualified
specialist workshop. Display
messages
297On-board computer and displays Z