cooling MERCEDES-BENZ AMG GT ROADSTER 2020 Owners Manual

#
Press button ¿.
Switch off the A/C function only brief lyother‐
wise the windo wsmay mist up more quickl y.
Condensation may drip from the underside of
th eve hicle when cooling mode is active. This is
not a sign that there is a malfunction. Setting climate control
toautomatic mode In auto
matic mode, the set temp erature is con‐
trolled and maintained at a const ant levelby the
air suppl y. #
Press the à button. #
Toswitch tomanual mode: pressthe H
or _ button. Climate
style Climate
style function
The following climate styles are available in auto‐
matic mode:
R FOCUS: high air flow , slightly cooler setting
R MEDIUM: medium air flow ,st andard setting R
DIFFUSE: low airflow , slightly warmer and
draught-f ree setting
Setting the clima testyle
Multimedia sy stem:
4 Vehicle 5
b Climate control
5 Climate mode #
Select FOCUS, MEDIUM orDIFFUSE .
% Tofeel the ef fect of the climate style, the
à function must be active (/ page102). Ac
tivating/deactivating the climate control
syn chro nisation function via the control
panel Climate control can be set centrally using
the
synchronisation function. The temp erature and
air distribution settings forth e driver's side will
be adop ted automatically forth e front passenger
side. #
Press the0 button.
The synchronisation function will be deactivated
if th e settings for one of theot her climate zones
are changed. Demisting
the windo ws Wi
ndo wsmis ted up on the inside #
Press button ¿. #
Press button Ã. #
Ifth e windo wscontinue tomist up: press the
¬ button.
Wi ndo wsmis ted up on the outside #
Switch on the windscreen wipers. #
Press button Ã. Switching air-recirculation mode on/off
#
Press theg button.
The interior air will be recirculated.
Air-reci rculation mode automatically swit ches to
fresh air mode af ter some time.
% If air-recirculation mode is switched on, the
windo wsmay mist up more quickl y.Switch
on air- recirculation mode only brie fly. 102
Climate cont rol

Brake sy
stem Note
s onthe brake sy stem
The brake sy stem of your vehicle is designed for
heavy loads. Therefore, there may be noise when
braking. The loads in the entire brake sy stem
which occur when driving on a racetrack are sig‐
nificantly grea terth an those during normal oper‐
ation.
The increased brake forc es and temp eratures
when driving on a racetrack inhe rently lead to
inc reased wear of the brake sy stem.
Check the condition and geometry of the brake
co ver plate before using theve hicle on a race‐
trac k.
Obser vethe information on the cooling of com‐
ponents which are subject tostra in when oper‐
ated on a racetrack (/ page 114).
Braking with ABS
Re peated hard braking within the ABS control
ra nge causes higher temp eratures in the brake
sy stem than controlled braking shortly before
th e ABS control limit. Brakepad
wear
The inner and outer brakepads may also suf fer
"tapered wear". This could lead topoor pedal
fe el. Therefore, you must also check the condi‐
tion of the brakepads before and af ter use on a
ra cetrack as part of astandard check forwe ar.
Brake discs
Obse rveth e information on the cooling of com‐
ponents which are subject tostra in in racetrack
ope ration (/ page 114).
Depending on theve hicle's equipment, the AMG
ceramic high-per form ance composite braking
sy stem is fitted in your vehicle. The assessment
of we ar must therefore be car ried out using a
special measurement procedure. The brakes are
measured using the cur rent condition of the
ceramic composite material as a criteria for
assessing thewe ar ins tead of assessing the
re sidual thickness.
Depending on the type of brake disc, thefo llow‐
ing are combinations used tomeasu rethewe ar
of the brake discs:
R Carbon-ceramic brake disc -
Visual assessment of the brake disc for
mechanical dama ge
- Wear measurement using the indicator
fi eld me thod; alternatively using the Pro‐
ceq Carbo teq®
measu ring device (e.g. in
th e AMG Performance Center or at AMG
Tr ackda ys)
R Grey cast iron brake disc
- Visual check
- Crack test
- Wearthickness test
The ventilation holes on gr eycast iron friction
ri ngs of standard brake discs in particular could
become bloc kedby brake dust. Therefore, check
th eve ntilation holes be fore using theve hicle on
a ra cetrack and clean them if necessar y.If nec‐
essar y,also clean the drilled holes.
Brake fluid
Che ckthefo llowing properties of the brake fluid
before each use on a racetrack:
R Boiling point
R Fill le vel Driving and pa
rking 11 5

When driving on a
racetrac k,make sure that the
brake fluid is not more than 12 months old.
Brake callipers, brake hoses and brake lines
Check thefo llowing for dama geeach time
before driving theve hicle on a racetrack:
R The du stboots on the brake callipers
R The brake hoses and brake lines
Re place them if necessar y.
Brake cooling
Special air deflectors and channels are fitted to
th e front and rear axles so that the brakes are
cooled suf ficiently. They supply the brake disks
with cooling air. Check that they are in per fect
condition and cor rectly fitted ea chtime be fore
driving theve hicle on a racetrac k.Excessi ve
we ar can be caused bydriving overke rbs, for
ins tance. Forth is reason, regularly check they
are all comple teand fitted securely.
In addition, check that the air guide plates are
seated securely and clean before and af ter driv‐
ing theve hicle on a racetrac k. Obser
vethe information on the cooling of com‐
ponents which are subject tostra in in when driv‐
ing on a racetrack (/ page 114). Wheels and tyres
Note
s on wheels
* NO
TERestrictions relating tosuspension
settings and driving characteristics Driving with wheels with dif
fering dimensions
of thefo llowing features could lead torestric‐
tions relating tothe suspension settings and
driving characteristics of theve hicle:
R diame ter
R wheel of fset #
Only use the wheels pr ovided by
Mercedes-AMG for use on a racetrac k. #
Only use wheels with appr ovedge ome‐
tr y. Do not use slick tyres. Suspension and body
components may
otherwise be subjected to
exc essively high loads. Obser
vethefo llowing no tes on changing a
wheel:
R change the wheels af ter15 ,000 km on a
ra cetrack at the latest.
R toensure concent ricity and la tera l trueness,
ch eck the wheel conta ct surfacefor dama ge
when changing a wheel. These should also
be measured in theeve nt of imbalance.
The wheel bolts are subjected tohigh wear when
used on a racetrac k.To ensure the wheels are
bolted securely on a permanent basis, replace
th e wheel bolts in thefo llowing situations:
R afte r appro ximately 1,000 km on a racetrac k.
R afte rte n bolting procedu res at the latest.
Note s on tyres &
WARNING Risk of injury duetodamaged
tyres
Damaged tyres can cause tyre pressure loss. #
Check the tyres regularly for signs of
dama geand replace any damaged tyres
immediatel y. 11 6
Driving and pa rking

&
WARNING Risk of an accident due to
va pour poc kets form ing in the brake sys‐
tem
The brake fluid constantly absorbs moisture
from the air. This lo wersthe boiling point of
th e brake fluid. If the boiling point is too lo w,
va pour poc kets may form inthe brake sys‐
te m when the brakes are applied hard.
This impairs the braking ef fect. #
Have the brake fluid rene we d at the
specified inter vals. Ha
ve the brake fluid regularly replaced at a
qu alified specialist workshop.
Only use a brake fluid appr ovedby Mercedes-
Benz according toMB-F reigabe or MB-Appr oval
33 1.0. Coolant
Note
s on coolant
Obser vethe no tes on operating fluids
(/ page 282). &
WARNING Risk offire ‑ and inju ryfrom
antifreeze
If antifreeze comes into contact with hot
component parts in the engine compart‐
ment, it may ignite. #
Allow the engine tocool down before
yo uto p up the antif reeze. #
Make sure that no antifreeze spills out
next tothefiller opening. #
Thoroughly clean the antif reeze from
component parts before starting the
ve hicle. *
NO
TEDama gecaused byincor rect cool‐
ant #
Only use coolant that has been pre‐
mixed with therequ ired antifreeze pro‐
te ction. Information on coolant is
available at thefo l‐
lowing locations:
R inthe Mercedes-Benz Specification for
Operating Fluids 310.1
- at https://be vo.mercedes-benz.com
- inthe Mercedes-Benz BeVo app
R at a qualified specialist workshop *
NO
TEOverheating at high outside tem‐
peratures If an inapp
ropriate coolant is used, the
engine cooling sy stem is not suf ficiently pro‐
te cted against overheating and cor rosion at
high outside temp eratures. #
Alw ays use coolant appr ovedby
Mercedes-Benz. #
Obser vethe instructions in the
Mercedes-Benz Specifications for Oper‐
ating Fluids 310.1. Ha
ve the coolant regularly replaced at a qualified
specialist workshop. 286
Tech nical da ta

The proportion of cor
rosion inhibitor/antifreeze
concentrate in the engine cooling sy stem should
be:
R a minimum of 50% (antifreeze pr otection
down toappr oximately -37°C)
R a maximum of 55% (antifreeze pr otection
down to-45°C) Note
s on windscreen washer fluid Obser
vethe no tes on operating fluids
(/ page 282). &
WARNING ‑ Risk of fire and injury due to
windscreen washer concentrate
Wi ndsc reen washer concentrate is highly
fl ammable. It could ignite if it comes into
con tact with hot engine component parts or
th eex haust sy stem. #
Make sure that no windscre enwasher
concentrate spills out next tothefiller
opening. *
NO
TEDama getotheex terior lighting
due tounsuitable windsc reen washer
fl uid Uns
uitable windsc reen washer fluids may
damage the plastic sur face of theex terior
lighting. #
Only use windscreen washer fluids
which are also suitable for use on plas‐
tic sur faces, e.g. MB SummerFit or MB
Wi nterFit. *
NO
TEBlocked spr aynozzles caused by
mixing windscreen washer fluids #
Do not mix MB SummerFit and MB Win‐
te rFit with other windscreen washer flu‐
ids. Do not use distilled or de-ionised
water asthefill
le ve l sensor may be triggered er roneously.
Re commended windscreen washer fluid:
R Abo vefreezing point: e.g. MB SummerFit
R Below freezing point: e.g. MB WinterFit Fo
rth e cor rect mixing ratio, referto the informa‐
tion on the antif reeze contai ner.
Mix thewa sher fluid with the windscreen washer
fl uid all year round. Ve
hicle data Ve
hicle dimensions The heights specifi
ed mayvary as a result of the
fo llowing factors:
R tyres
R load
R condition of the suspension
R optional equipment Te
ch nical da ta287

Display messages
Possible causes/consequences and M MSolutions
+ Top up coolant See Own-
er’s Manual *T
he coolant le vel is too lo w.
* NO
TEEngine damage duetoinsuf ficient coolant #
Avoid long journe yswith insuf ficient coolant. #
Add coolant (/ page 235). #
Have the engine cooling sy stem checked at a qualified specialist workshop.
ÿ
Coolant Stop vehicle
Switch engine off *T
he coolant is too hot. #
Stop theve hicle immediately in accordance with the traf fic conditions and switch off the engine. &
WARNING Danger of burn s when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. #
Wait until the engine has cooled down. #
Make sure that the air supply tothera diator is not obstructed. #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120 °C. Displ
aymessa ges and warning/indicator lamps 305

Display messages
Possible causes/consequences and M MSolutions #
For all other transmission positions, park theve hicle safely. #
Consult a qualified specialist workshop.
Reversing not poss. Con-
sult workshop *
The transmission is malfunctioning. The transmission position kcannot be selected. #
Consult a qualified specialist workshop.
Transmission Malfunction
Stop *
The transmission is malfunctioning. The transmission shifts toneutral iautomatically. #
Stop theve hicle immediately in accordance with the traf fic conditions. #
Depress the brake pedal. #
Enga gepark position j. #
Consult a qualified specialist workshop.
Stop vehicle Leave engine
running Wait Transmission
cooling *T
he transmission is overheating. Pulling away may be temp orarily impaired or not possible. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Lea vethe engine running. #
Wait until the display message disappears before pulling away.
d Transmission oil cooling
Malfunction *T
he transmission's coolant pump is faulty. The transmission may overheat. #
Select thePerformance menu inthe on-board computer and check the transmission oil temp erature . #
Avoid a high load with a dynamic driving style. #
If transmission oil temp eratures are below 120 °C, drive on tothe nearest qualified specialist workshop. 308
Display messages and warning/indicator lamps

B
BA S (Brake Assist Sy stem) .................... .133
Battery Key ........................................................ 58
Battery see Bat tery (vehicle)
Bat tery (vehicle) ...................................... 256
Charging .............................................. 255
No tes .................................................. 252
No tes (s tarting assis tance and
ch arging) ............................................ .253
Re placing ............................................ 256
St arting assis tance .............................. 255
Belt see Seat belt
Blind Spot Assi st..................................... 15 6
Ac tivating/deactivating ...................... .157
Fu nction .............................................. 15 6
Sy stem limitations ...............................1 56
Blue tooth ®
................................................ 173
Information .......................................... 173
Setting up an Internet connection ........ 211
Switching on/off ................................. 173Switching profile (DUN/PAN) ..............
213
Blue tooth ®
audio
Ac tivating ............................................ 224
De-authorising (de-regis tering) the
device .................................................. 225
Information .......................................... 222
Overview .............................................2 23
Sear ching for a track ........................... 225
Sear ching for and auth orisingthe
device .................................................. 223
Selecting a media pla yer .....................2 24
Boot lid Closing .................................................. 64
HANDS-FREE ACCESS ...........................64
Locking separa tely ................................ 65
Opening ................................................. 63
Opening dimensions ............................ 287
Brake Assist System
see BAS (Brake Assi stSystem)
Brake fluid
No tes .................................................. 285
Brake forc e distribution
EBD (Elect ronic Brake forc e Distribu‐
tion) ..................................................... 13 6Brake sy
stem
ABS ...................................................... 11 5
Brake callipers ..................................... 11 6
Brake cooling ....................................... 11 6
Brake discs ......................................... .115
Brake fluid ............................................ 11 5
Brake hose ........................................... 11 6
Brake line ............................................. 11 6
Brake pads ........................................... 11 5
No tes ................................................... 11 5
Brakes ABS (Anti-lo ckBraking Sy stem) ........... 13 3
Ac tive Brake Assi st.............................. 13 6
Ad aptive brake lights ...........................1 38
AMG ceramic high-per form ance
composite brake sy stem ......................1 12
BA S (Brake Assi stSystem) .................. 13 3
Driving tips .......................................... 108
EBD (Electronic Brake forc e Distribu‐
tion) ..................................................... 13 6
HOLD function .................................... .145
Limi ted braking ef fect (salt-treated
ro ads) .................................................. 108
New/replaced brakepads/brake
discs .................................................... 107348
Index

#
Stop vehicle See Owner's Man‐
ual .......................................................3 25
ç suspended .................................. 315
: Switch off lights ......................... 298
: Switch on headlamps ................. 298
K Top lo wering ............................... 296
+ Top up coolant See Owner ’s
Manual ................................................ 305
¥ Top up washer fluid .................... 304
d Trans. oil overheated Drive on
with care ............................................. 309
d Transmission oil cooling Mal‐
function .............................................. .308
! Turn on the ignition torelease
th e parking brake ................................. 313
d Vehicle is operational Switch
off ignition before exiting .................... 300
h Warning tyre defect .................... 328
h Wheel sensor(s) missing .............327 K
While stationar y,apply the
brakes before operating the soft top.
.............................................................2 96
Ac tive Brake Assi stFunctions cur‐
re ntly limited See Owner's Manual ...... 322
Ac tive Brake Assi stFunctions limited
See Owner's Manual ........................... 322
Ac tive Dis tance Assi stavailable
again .................................................... 316
Ac tive Dis tance Assi stcur rently
una vailable See Owner's Manual .........316
Ac tive Dis tance Assi stinope rative ....... 315
Ac tive Parking Assist and
PA RKTRONIC inoperati veSee Own‐
er's Manual .......................................... 317
Ad aptive Highbeam Assist Camera
view restricted See Owner's Manual ... 299
Ad aptive Highbeam Assist cur rently
una vailable See Owner's Manual .........299 Ad
aptive Highbeam Assist inopera‐
tive ...................................................... 299
App lybrake todeselect Park (P)
position ...............................................3 06
Apply brake toselect R ........................ 307
Au xilia rybattery malfunction .............. 309
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ......................318
Blind Spot Assi stinope rative ............... 318
Cruise contro l and Limiter inope ra‐
tive ....................................................... 314
Cruise contro l inoperative .................... 314
Cruise contro l off................................ .314
Electronic rear axle dif fere ntial lo ck
cur rently una vailable .......................... .302
Electronic rear axle dif fere ntial lo ck
inope rative ........................................... 301
Fr ont-passenger airbag disabled See
Owner's Manual ..................................2 92 Index
353

Fr
ont-passenger airbag enabled See
Owner's Manual ..................................2 92
Hazard warning lamps malfunction‐
ing ...................................................... .299
Limi ter inoperative ...............................3 15
Limiter passive ..................................... 314
Mercedes me connect Services limi‐
te d See Owner's Manual .....................323
N permanently active Risk of vehicle
ro lling .................................................. 307
Only select Park (P) when vehicle is
st ationary ............................................ 306
PRE- SAFE inoperative See Owner's
Manual ................................................ 293
RACE START cancelled ......................... 318
RACE START not possible See Own‐
er's Manual .......................................... 318
Ra dar sensors dirty See Owner's
Manual ................................................ 323 Re
ar spoiler control sy stem inopera‐
tive ...................................................... 302
Re ar spoiler inoperative Limit XXX
km/h .................................................. .302
Re duce speed ...................................... 329
Re versing not poss. Consult work‐
shop ....................................................3 08
Risk of vehicle rolling Driver door
open and transmission not in P ...........307
Speed limit (winter tyres) XXX km/h ...316
St op vehicle Lea veengine running
Wa itTransmission cooling ...................308
To shift out of P or N,depress brake
and start engine .................................. 307
To switch off the engine, press
St art/ Stop button for at least 3 sec‐
onds or 3 times. .................................. 304
Tr ansmission Malfunction Stop ........... 308
Ty re press. monitor cur rently una vail‐
able .................................................... .326 Ty
re press. monitor inoperative ...........326
Ty re press. monitor inoperative No
wheel sensors .................................... .327
Ty re(s) ove rheated ...............................3 28
Wi thout changing gear, consult work‐
shop ....................................................3 07
Distance cont rol
see Active Dis tance Assi stDISTRONIC
DI STRO NIC
see Active Dis tance Assi stDISTRONIC
Door Additional door lock .............................. 59
Locking (emer gency key) ...................... .62
Opening (from the inside) ......................60
Un locking (emer gency key) .................. .62
Un locking (from the inside) ...................60
Door cont rol panel .................................... .14
Double-clut chfunction ............................ 121
Drag Race
Setting ................................................ .182
Draught stop
Fitting ................................................... .68354
Index