2015 MERCEDES-BENZ S-Class COUPE stop start

recognize them at all. The system is not a
substitute for a well-rested and attentive
driver.
The functionality of ATTENTION ASSIST is
restricted and warnings may be delayed or
not occur at all:
R if the length of the journey is less than
approximately 30 minutes
R if the road condition is poor, e.g. if the sur-
face is uneven or if there are potholes
R if there is a strong side wind
R if you have adopted a sporty driving style
with high cornering speeds or high rates of
acceleration
R if you are predominantly driving slower
than 37 mph (60 km/h) or faster than
125 mph (200 km/h)
R if you are driving with the active Steer
Assist of DISTRONIC PLUS
R if the time has been set incorrectly
R in active driving situations, such as when
you change lanes or change your speed
ATTENTION ASSIST is reset when you con-
tinue your journey and starts assessing your
tiredness again if:
R you switch off the engine.
R you take off your seat belt and open the
driver's door, e.g. for a change of drivers or
to take a break.
Displaying the attention level You can have current status information dis-
played in the assistance menu (Y page 240)
of the on-board computer. X
Select the Assistance display for Attention
Assist using the on-board computer
(Y page 239).
The following information is displayed: R length of the journey since the last break.
R the attention level determined by ATTEN-
TION ASSIST, displayed in a bar display in
five levels from high to low.
R if ATTENTION ASSIST is unable to calculate
the attention level and cannot output a
warning, the System Passive
System Passive message
appears. The bar display then changes the
display, e.g. if you are driving at a speed
below 37 mph (60 km/h) or above 124 mph
(200 km/h).
Activating ATTENTION ASSIST X
Activate ATTENTION ASSIST using the on-
board computer (Y page 241).
The system determines the attention level
of the driver depending on the setting
selected:
Standard selected: the sensitivity with
which the system determines the attention
level is set to normal.
Sensitive selected: the sensitivity is set
higher. The attention level detected by Atten- tion Assist is adapted accordingly and the
driver is warned earlier.
When ATTENTION ASSIST is deactivated, the 00D7 symbol appears in the multifunction
display in the assistance graphic display.
When ATTENTION ASSIST has been deactiva- ted, it is automatically reactivated after the
engine has been stopped. The sensitivity
selected corresponds to the last selection
activated (standard/sensitive).
Warning in the multifunction display If fatigue or increasing lapses in concentra-
tion are detected, a warning appears in the
multifunction display:
Attention Assist: Attention Assist:
Take a break!
Take a break! 212
Driving systemsDriving and parking

0038 Press briefly:
R Back
R In the Radio
Radio/Media Mediamenu: dese-
lects the track or station list or
list of available radio sources/
media
R Hides display messages
R Exits the telephone book/redial
memory 0038 Press and hold:
R Calls up the standard display in
the Trip Trip menu Right control panel
0076 R
Rejects or ends a call
R Exits phone book/redial mem-
ory 0061 R
Makes or accepts a call
R Switches to the redial memory 0081
0082 R
Adjusts the volume 0063 R
Mute 00E3
Switches on the Voice Control Sys-
tem; see the separate operating
instructions Multifunction display
0043
Top status bar
0044 Display
0087 Bottom status bar
X To call up the menu list in display
panel 0044:press the 00E2button on the
steering wheel.
Display panel 0044shows the selected menu
or submenu and display messages.
Possible top status bar displays: Outside temperature (Y page 227)
003E Turn signal, left (Y page 122)
0058 Low-beam headlamps (Y page 121)
0057 High-beam headlamps (Y page 122)
0060 Parking lamps and license plate lamp
(Ypage 121)
003D Turn signal, right (Y page 122)
Possible bottom status bar displays:
00D6 ECO start/stop function
(Ypage 151)
00D9 HOLD function (Y page 188)
005D Active Parking Assist (Y page 198)
00CE Adaptive Highbeam Assist Plus
(Ypage 123)
004F DISTRONIC PLUS Steering Assist and
Stop&Go Pilot (Y page 186)
Additional speedometer
(Y page 244) 228
Displays and operationOn-board computer and displays

You will see one of the following display mes-
sages in the multifunction display:
R Phone READY
Phone READY or the name of the network
provider: the mobile phone has found a
network and is ready to receive.
R Phone No Service
Phone No Service: there is no network
available or the mobile phone is searching
for a network.
Accepting a call X
Press the 0061button on the steering
wheel to accept an incoming call.
If someone calls you when you are in the Telephone Telephone menu, a display message appears
in the multifunction display.
If you are not in the Telephone
Telephone menu, you can
still accept a call.
Rejecting or ending a call X
Press the 0076button on the steering
wheel.
If you are not in the Telephone
Telephone menu, you can
still reject or end a call.
Dialing an entry from the phone book X
Use 00E2 on the steering wheel to call up
the list of menus.
X Press 0064or0063 on the steering wheel
to select the Telephone
Telephonemenu.
X Confirm by pressing 0076on the steering
wheel.
X Press the 0064,0063or0076 button to
switch to the phone book. X
Press the 0064or0063 button to select the
desired name.
or X To begin rapid scrolling: press and hold
the 0064 or0063 button for longer than
one second.
Rapid scrolling stops when you release the button or reach the end of the list.
X If only one telephone number is stored
for a name: press the0061or0076 button
to start dialing.
or X If there is more than one number for a
particular name: press the0061or0076
button to display the numbers.
X Press the 0064or0063 button to select the
number you want to dial.
X Press the 0061or0076 button to start dial-
ing.
or X To exit the phone book: press the0076or
0038 button.
Redialing The on-board computer saves the last names
or numbers dialed in the redial memory.
X Use 00E2 on the steering wheel to call up
the list of menus.
X Press 0064or0063 on the steering wheel
to select the Telephone Telephonemenu.
X Confirm by pressing 0076on the steering
wheel.
X Press the 0061button to switch to the
redial memory.
X Press the 0064or0063 button to select the
desired name or number.
X Press the 0061or0076 button to start dial-
ing.
or
X To exit the redial memory: press the
0076 or0038 button. 238
Menus and submenusOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions Collision Preven‐
Collision Preven‐
tion Assist Plus tion Assist Plus
Currently Unavail‐ Currently Unavail‐
able See Opera‐ able See Opera‐
tor's Manual tor's Manual COLLISION PREVENTION ASSIST PLUS is temporarily not opera-
tional. Possible causes are:
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
When the causes stated above no longer apply, the display mes-
sage disappears.
COLLISION PREVENTION ASSIST PLUS is operational again.
If the display message does not disappear:
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 166).
X Restart the engine. Collision Preven‐ Collision Preven‐
tion Assist Plus tion Assist Plus
Inoperative Inoperative COLLISION PREVENTION ASSIST PLUS is temporarily inoperative
due to a malfunction. Adaptive Brake Assist may also have failed.
X Visit a qualified specialist workshop. PRE-SAFE
PRE-SAFE
Functions
Functions
Currently Limited
Currently Limited
See See Operator's
Operator's Man‐
Man‐
ual
ual PRE
‑SAFE ®
PLUS or PRE ‑SAFE®
Brake is temporarily inoperative.
Possible causes are:
R function is impaired due to heavy rain or snow.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
When the causes stated above no longer apply, the display mes-
sage disappears.
PRE ‑SAFE ®
PLUS and PRE ‑SAFE®
Brake are operational again.
If the display message does not disappear:
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 166).
X Restart the engine. PRE-SAFE PRE-SAFE
Functions
Functions
Limited See Opera‐
Limited See Opera‐
tor's Manual tor's Manual PRE
‑SAFE ®
PLUS or PRE‑ SAFE®
Brake is unavailable due to a mal-
function. BAS PLUS may also have failed.
X Visit a qualified specialist workshop. Display
messages
255On-board computer and displays Z

Display messages
Possible causes/consequences and
0050
0050Solutions Radar Sensors
Radar Sensors
Dirty See Opera‐ Dirty See Opera‐
tor's Manual tor's Manual At least one of the following driving systems or driving safety sys-
tems is temporarily restricted or inoperative:
R PRE-SAFE ®
PLUS
R PRE-SAFE ®
Brake
R COLLISION PREVENTION ASSIST PLUS
R Active Lane Keeping Assist
R Active Blind Spot Assist
R DISTRONIC PLUS with Steering Assist and Stop&Go Pilot
Possible causes are:
R the sensors in the radiator trim and/or in the bumpers are dirty.
R the function of the driving system and/or driving safety system
is impaired due to heavy rain or snow.
A warning tone also sounds.
When the causes stated above no longer apply, the display mes-
sage disappears. All driving systems/driving safety systems are
operative again.
If the display message does not disappear:
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 166).
X Switch off the engine.
X Clean the sensors in the following locations (Y page 329):
R in the radiator trim
R in the front bumper
R in the rear bumper, particularly in the middle of the rear
bumper
X Restart the engine.
The display message disappears. 0075
SRS Malfunction SRS Malfunction
Service Required Service Required The restraint system is faulty. The
0075warning 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 42). 256
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions 00AC
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 166).
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 †). 003D
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 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 166).
X Consult a qualified specialist workshop. 264
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions 003D
Stop Vehicle See Stop Vehicle See
Operator's Manual Operator's Manual The battery is no longer being charged and the battery charge level
is too low.
A warning tone also sounds.
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 166).
X Observe the instructions in the 003DSee SeeOperator's
Operator's Manual
Manual
display message.
X Consult a qualified specialist workshop. 003D
Start Engine See Start Engine See
Operator's Manual Operator's Manual The engine is switched off and the battery charge level is too low.
X Switch off electrical consumers that you do not need, such as
the rear window defroster and interior lighting.
X Leave the engine running for a few minutes or drive a long dis-
tance.
The battery is being charged. 00B2
Check Engine Oil Check Engine Oil
At Next Refueling At Next Refueling The engine oil level has dropped to the minimum level.
A warning tone also sounds.
! Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
X Check the oil level when next refueling, at the latest
(Y page 319).
X If necessary, add engine oil (Y page 321).
X Have the engine checked at a qualified specialist workshop if
engine oil needs to be added more often than usual.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.com. 00B2
Check Engine Oil Check Engine Oil
Level Level
(Add
(Add1
1quart)
quart) The engine oil level has dropped to the minimum level.
! Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
X Check the oil level when next refueling, at the latest
(Y page 319).
X If necessary, add engine oil (Y page 321).
X Have the engine checked at a qualified specialist workshop if
engine oil needs to be added more often than usual.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.com. Display
messages
265On-board computer and displays Z

Display messages
Possible causes/consequences and
0050
0050Solutions Active Blind Spot
Active Blind Spot
Assist Currently Assist Currently
Unavailable See Unavailable See
Operator's Manual Operator's Manual Active Blind Spot Assist is temporarily inoperative.
Possible causes are:
R function is impaired due to heavy rain or snow.
R the radar sensor system is outside the operating temperature
range.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
When the causes stated above no longer apply, the display mes-
sage disappears.
Active Blind Spot Assist is operational again.
If the display message does not disappear:
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 166).
X Restart the engine. Active Blind Spot Active Blind Spot
Assist Inoperative Assist Inoperative Active Blind Spot Assist is defective.
X Visit a qualified specialist workshop. Park Assist Can‐
Park Assist Can‐
celed celed The driver's door is open.
X Repeat the parking gap measurement and parking process with
the driver's door closed. You touched the multifunction steering wheel while steering inter-
vention was active.
X While steering intervention is active, make sure that the multi-
function steering wheel is not touched unintentionally. The vehicle has started to skid and ESP
®
has intervened.
X Use Active Parking Assist again later (Y page 198).Park Park
Assist
Assist Inoper‐
Inoper‐
ative
ative PARKTRONIC is malfunctioning or faulty.
X Follow the instructions and helpful hints in the "Problems with
PARKTRONIC" section (Y page 198).
If the display message continues to be displayed: X Visit a qualified specialist workshop. Display
messages
269On-board computer and displays Z