2018 MERCEDES-BENZ AMG GT ROADSTER coolant temperature

Central control panelOverview .......................................... 38
Central locking
Locking/unlocking (SmartKey) ........ 66
Changing the media source .............165
Charge retention
Socket ...........................................1 30
Charge-air pressure (on-board
computer) .......................................... 170
Child
Restraint system .............................. 56
Child seat
Forward-facing restraint system ...... 57
On the front-passenger seat ............ 57
Rearward-facing restraint system .... 57
Children
Special seat belt retractor ............... 56
Children in the vehicle
Important safety notes .................... 55
Cigarette lighter ................................ 221
Cleaning
Mirror turn signal ........................... 244
Climate control
Air-recirculation mode ................... 107
Automatic climate control (dual-
zone) .............................................. 103
Controlling automatically ............... 105
Cooling with air dehumidification .. 104
Cooling with air dehumidification
(multimedia system) ...................... 212
Defrosting the windows ................. 106
Defrosting the windshield .............. 106
ECO start/stop function (3-zone
automatic climate control) ............. 104
General notes ................................ 103
Indicator lamp ................................ 105
Information about using auto-
matic climate control ..................... 104
Overview ........................................ 212
Overview of systems ...................... 103
Problem with the rear window
defroster ........................................ 107
Problems with cooling with air
dehumidification ............................ 105
Refrigerant ..................................... 291
Refrigerant filling capacity ............. 291
Setting the air distribution ............. 105
Setting the air vents ...................... 107 Se
tting the airflow ......................... 106
Setting the climate mode (multi-
media system) ............................... 212
Setting the temperature ................ 105
Switching air-recirculation mode
on/off ............................................ 107
Switching on/off ........................... 104
Switching the rear window
defroster on/off ............................ 106
Switching the synchronization
function on and off ........................ 106
Synchronization function (multi-
media system) ............................... 213
Climate control settings
Multimedia system ........................ 212
Climate control system
Climate control (3-zone automatic
climate control) ............................. 104
Cockpit
Overview .......................................... 33
Code for Apps
see QR code
COMAND display
Cleaning ......................................... 245
Combination switch ............................ 97
Connecting a USB device
see also Digital Operator's Man-
ual .................................................. 208
Consumption statistics (on-board
computer) .......................................... 162
Controller ........................................... 209
Convenience closing feature .............. 78
Convenience opening
With the SmartKey ........................... 78
Coolant (engine)
Checking the level ......................... 238
Display message ............................ 186
Filling capacity ............................... 290
Important safety notes .................. 290
Temperature display in the instru-
ment cluster .................................. 159
Warning lamp ................................. 203
Cooling
see Climate control
Copyright ............................................. 32
Cornering light function
Display message ............................ 185
Index7

Technical dataCapacities ...................................... 286
Information .................................... 285
Tires/wheels ................................. 283
Vehicle data ................................... 291
Telephone
Accepting a call (multifunction
steering wheel) .............................. 167
Authorizing a mobile phone (con-
necting) ......................................... 215
Connecting a mobile phone
(device manager) ........................... 214
Display message ............................ 196
Introduction ................................... 166
Menu (on-board computer) ............ 166
Number from the phone book ........ 167
Redialing ........................................ 167
Rejecting/ending a call ................. 167
see also Digital Operator's Man-
ual .................................................. 208
Temperature
Coolant (display in the instrument
cluster) .......................................... 159
Engine oil (on-board computer) ...... 170
Outside temperature ...................... 159
Setting (climate control) ................ 105
Transmission oil (on-board com-
puter) ............................................. 170
Timing (RACETIMER) ......................... 172
Tire pressure
Calling up (on-board computer) ..... 267
Checking manually ........................ 266
Display message ............................ 191
Maximum ....................................... 266
Not reached (TIREFIT) .................... 251
Notes ............................................. 265
Reached (TIREFIT) .......................... 252
Recommended ............................... 264
Tire pressure monitor
Checking the tire pressure elec-
tronically ........................................ 268
Function/notes ............................. 267
General notes ................................ 267
Important safety notes .................. 267
Restarting ...................................... 269
Warning lamp ................................. 206
Warning message .......................... 268
Tire-change tool kit ........................... 249 TIREFIT kit
Important safety notes .................. 250
Storage location ............................ 249
Tire pressure not reached .............. 251
Tire pressu re re
ached .................... 252
Using ............................................. 250
Tires
Aspect ratio (definition) ................. 278
Average weight of the vehicle
occupants (definition) .................... 277
Bar (definition) ............................... 277
Changing a wheel .......................... 279
Characteristics .............................. 277
Checking ........................................ 262
Curb weight (definition) ................. 278
Definition of terms ......................... 277
Direction of rotation ...................... 279
Display message ............................ 191
Distribution of the vehicle occu-
pants (definition) ............................ 279
DOT (Department of Transporta-
tion) (definition) ............................. 277
DOT, Tire Identification Number
(TIN) ............................................... 276
GAWR (Gross Axle Weight Rating)
(definition) ..................................... 277
GVW (Gross Vehicle Weight) (def-
inition) ........................................... 278
GVWR (Gross Vehicle Weight Rat-
ing) (definition) .............................. 278
Important safety notes .................. 261
Increased vehicle weight due to
optional equipment (definition) ...... 277
Information on driving .................... 261
Kilopascal (kPa) (definition) ........... 278
Labeling (overview) ........................ 274
Load bearing index (definition) ...... 279
Load index ..................................... 276
Load index (definition) ................... 278
Maximum load on a tire (defini-
tion) ............................................... 278
Maximum loaded vehicle weight
(definition) ..................................... 278
Maximum permissible tire pres-
sure (definition) ............................. 278
Maximum tire load ......................... 276
Maximum tire load (definition) ....... 278
Notes on sport tires ....................... 261
Index19

ProblemPossible causes/consequences andMSolutions
The engine is not running
smoothly and is misfir-
ing.There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
XOnly depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it.
XHave the cause rectified immediately at a qualified specialist work-
shop.
The coolant temperature
display shows a value
above 248 ‡ (120 †).The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant to
cool down.
XCheck the coolant level (Ypage 238). Observe the warning notes
as you do so and add coolant if necessary.
DYNAMIC SELECT controller
General information
Select the drive program using the DYNAMIC
SELECT controller.
Available drive programs:
C ComfortComfort-oriented, optimum-
economy engine and trans-
mission settings
SSportSporty engine and transmis-
sion settings
S+ Sport PlusEspecially sporty engine and
transmission settings
RACE
(AMG GT C
Roadster)Maximum sportiness and
engine and transmission
settings suitable for the
racetrack
IIndividualIndividual settings
In urban traffic and stop-start traffic, drive pro-
gram Cis recommended.
Depending on the drive program selected the
following vehicle characteristics will change:
Rthe drive (engine management)
Rthe transmission management
RESP®(Ypage 62)
Rthe suspension (Ypage 147)
Rthe position of the exhaust flap
(Ypage 114)
Rthe availability of the ECO start/stop function (Ypage 113)
Rthe availability of gliding mode
(Ypage 120)
Further information for automatic drive program
characteristics (
Ypage 122).
Additionally, in drive program Iyou can config-
ure the respective vehicle characteristics using
the multimedia system. You can find informa-
tion about this in the Digital Operator's Manual.
Each time you start the engine with the Smart-
Key or the Start/Stop button, drive program Cis
activated. Further information about starting
the engine (
Ypage 111).
Selecting the drive program
XTurn DYNAMIC SELECT controller :until the
desired drive program is selected.
The selected drive program appears in the
multifunction display. After five seconds the
116DYNAMIC SELECT controller
Driving and parking

Important safety notes
GWARNING
If you operate information systems and com-
munication equipmen tintegrate din th evehi-
cle when driving ,you may be distracte dfrom
th etraffic situation .You could also lose con-
trol of th evehicle. Ther eis aris kof an acci-
dent.
Only operate this equipmen twhen th etraffic
situation permits. If you are no tsur ethat this
is possible ,park th evehicl epayin gattention
to traffic condition sand operate th eequip-
men twhen th evehicl eis stationary.
You must observ eth elegal requirements for th e
country in whic hyou are currentl ydriving when
operating th eon-board computer.
GWARNIN G
If th einstrumen tcluste rhas faile dor mal-
functioned, you may no trecognize function
restriction sin systems relevan tto safety. The
operating safet yof your vehicl emay be
impaired .Ther eis aris kof an accident.
Drive on carefully. Hav eth evehicl echecke d
at aqualified specialist workshop immedi-
ately.
The on-board computer only shows message sor
warning sfrom certain systems in th emultifunc-
tion display. You should therefor emak esur e
your vehicl eis operating safely at all times .
If th eoperating safet yof your vehicl eis
impaired ,pull ove ras soo nas it is saf eto do so.
Contac t aqualified specialist workshop.
Fo ran overview, see th einstrumen tpanel illus-
tration (
Ypage 34).
Displays and operation
Speedometer with segments
The segments in th espeedometer indicat e
whic hspee drange is available:
RCruis econtrol activated (Ypage 134): The segments ligh
tup from th estore dspee d
to th etype-tested maximum speed.
RDistanc ePilot DISTRONI Cis activated
(Ypage 136):
On eor two segments in th eset spee drange
ligh tup.
RDistanc ePilot DISTRONI Cdetects avehicl ein
fron tmoving mor eslowly than th estore d
speed:
The segments between th espee dof th evehi-
cle in fron tand th estore dspee dligh tup.
Tachometer
!
Do no tdriv ein th eoverrevving range, as this
could damag eth eengine.
The red ban din th etachometer indicates th e
engine's overrevving range.
The fuel suppl yis interrupted to protect th e
engin ewhen th ered ban dis reached.
Outside temperature display
You should pay special attention to road condi-
tion swhen temperatures are aroun dfreezing
point.
Bea rin min dthat th eoutside temperature dis-
play indicates th emeasured air temperature
and no tth eroad surfac etemperature.
The outside temperature display is in th emulti-
function display (
Ypage 161).
Changes in th eoutside temperature are dis-
played after ashort delay.
Coolant temperature gage
GWARNIN G
Opening th ehoo dwhen th eengin eis over-
heated or when there is afir ein th eengin e
compartmen tcould expos eyou to hot gase s
or other servic eproducts .Ther eis aris kof
injury.
Let an overheate dengin ecool down before
opening th ehood. If there is afir ein th e
engin ecompartment, keep th ehoo dclosed
and contact th efir edepartment.
Displays and operation159
On-board computer and displays
Z

!If the coolant temperature is too high, a dis-
play message is shown.
If the coolant temperature display is in the
area marked in red, do not continue driving.
Otherwise, the engine will be damaged.
The coolant temperature display is in the lower
section of the tachometer (
Ypage 34).
Under normal operating conditions and with the
specified coolant level, the coolant temperature
display may rise to the red marking.
Operating the on-board computer
:Multifunction display
;Right control panel
=Left control panel
XTo activate the on-board computer: set the
Start/Stop button to key position 1.
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
òROpens the menu list
9
:Press briefly:
RScrolls in lists
RSelects a menu or function
RIn the
RadioorMediamenu:
opens the track or station list and
selects a station, an audio track or
a video scene
RIn the Telephonemenu: switches
to the phone book and selects a
name or a telephone number
9
:Press and hold:
RScrolls quickly through all lists
RIn the RadioorMediamenu:
selects a station, audio track or
video scene using rapid scrolling
RIn the Telephonemenu: starts
rapid scrolling if the phone book is
open
aRIn all menus: confirms the selected
entry in the list
RIn the RadioorMediamenu:
opens the list of available radio
sources or media
RIn the Telephonemenu: switches
to the phone book and starts dial-
ing the selected number
ñRSwitches off the Voice Control
System (see the Digital Operator's Manual)
%Press briefly:
RBack
RIn the RadioorMediamenu: dese-
lects the track or station list or list
of available radio sources or media
RHides display messages
RExits the telephone book/redial
memory
%Press and hold:
RCalls up the standard display in the
Tripmenu
160Displays and operation
On-board computer and displays

Engine
Display messagesPossible causes/consequences andMSolutions
+
CheckCoolantLevelSee Operator's Man‐ual
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.
XAdd coolant, observing the warning notes before doing so
(Ypage 238).
XIf coolant needs to be added more often than usual, have the engine coolant system checked at a qualified specialist workshop.
?The fan motor is malfunctioning.
XAt coolant temperatures below 248 ‡(120 †), drive to the nearest
qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in moun-
tainous terrain and stop-and-go traffic.
?
Coolant Too HotStop Vehicle TurnEngine Off
The coolant is too hot.
A warning tone also sounds.
GWARNING
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.
XPull over and stop the vehicle safely and switch off the engine, pay- ing attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 127).
XWait until the engine has cooled down.
XMake sure that the air supply to the engine radiator is not blocked,e.g. by snow, slush or ice.
XDo not start the engine again until the display message goes out and
the coolant temperature is below 248 ‡ (120 †). Otherwise, the
engine could be damaged.
XPay attention to the coolant temperature gauge.
XIf the temperature increases again, visit a qualified specialist work-
shop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 248 ‡ (120 †).
186Display messages
On-board computer and displays

Engine
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
;NThe yellow Check Engine warning lamp lights up while the engine is running.
There may be a malfunction, for example:
Rin the engine management
Rin the fuel injection system
Rin the exhaust system
Rin the ignition system
Rin the fuel system
The emission limit values may be exceeded and the engine may be in emergency
mode.
XHave the vehicle checked as soon as possible at a qualified specialist workshop.
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 require-
ments in effect in these states. If in doubt, check whether such legal regulations
apply in the state in which you are currently driving.
8N The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel level has dropped into the reserve range.
XRefuel at the nearest gas station.
8N 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 filler cap is not closed correctly or the fuel system is leaking.
XCheck that the fuel filler cap is correctly closed.
XIf the fuel filler cap is not correctly closed: close the fuel filler cap.
XIf the fuel filler cap is closed:visit a qualified specialist workshop.
?NThe red coolant warning lamp lights up while the engine is running and the
coolant temperature gauge is at the start of the scale.
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.
XPull 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.
XSecure the vehicle against rolling away (Ypage 127).
XConsult a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster203
On-board computer and displays
Z

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
?NThe 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.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 127).
XLeave the vehicle and keep a safe distance from the vehicle until the engine has cooled down.
XCheck the coolant level and add coolant, observing the warning notes
(Ypage 238).
XIf you need to add coolant more often than usual, have the engine coolant sys-
tem checked.
XMake sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
XDo not start the engine again until the coolant temperature is below 248 ‡
(120 †). Otherwise, the engine could be damaged.
XDrive to the nearest qualified specialist workshop.
XAvoid 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 248 ‡(120 †). The airflow to the engine
radiator may be blocked or the coolant level may be too low.
GWARNING
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.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 127).
XLeave the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
XCheck the coolant level and add coolant, observing the warning notes
(Ypage 238).
XIf you need to add coolant more often than usual, have the engine coolant sys-
tem checked.
204Warning and indicator lamps in the instrument cluster
On-board computer and displays