2020 MERCEDES-BENZ AMG GT R-ROADSTER winter tyres

Pe
rm anent limi ter
If th eve hicle should ne verexc eed a specific
speed (e.g. for driving in winter tyre mode), you
can set this speed with the permanent limiter.
Yo u do this by limiting the speed toava lue
between 160 km/h and 240 km/h in the multi‐
media sy stem (/ page141).
Shortly before the set speed is reached, it
appears in the multifunction displa y.When you
confirm the message, display messages no lon‐
ge r appear until you swit choff theve hicle. The
speed will only be displa yed again once theve hi‐
cle has been restar ted or if the set speed is
ch anged.
The permanent limiter does not swit chtopas‐
sive mode even du ring kickdown and the driven
speed remains below the set speed.
Setting the speed limitation for winter tyres
Multimedia sy stem:
4 Vehicle 5
î Vehicle settings
5 Winter tyres limit #
Select a speed or deactivate the function. Ac
tive Di stance Assist DISTRO NIC Fu
nction of Active Di stance Assist
DISTRO NIC
Ac tive Dis tance Assi stDISTRONIC maintains the
set speed on free-flowing roads. If vehicles in
front are de tected, the set dis tance is main‐
ta ined, if necessar y,until theve hicle comes to a
halt. The vehicle accelerates or brakes depend‐
ing on the dis tance totheve hicle in front and
th e set speed. The speed (in thera nge between
30 km/h and 200 km/h) and the dis tance tothe
ve hicle in front are set and sa ved on thesteering
wheel.
Other features of Active Dis tance Assi st
DISTRONIC:
R Adjusts the driving style depending on the
selected drive program (fuel ef ficient, com‐
fo rtable or dynamic) (/ page117)
R Initiates ac celerationtothestored speed if
th e turn signal indicator is switched on to
ch ange totheove rtaking lane
Obse rveth e no tes on driving sy stems and your
re sponsibility; you may otherwise failto recog‐
nise dangers (/ page 131). Ac
tive Di stance Assist DISTRO NIC displaysin
th e instrument clus ter Assi
stance graphic
1 Vehicle in front
2 Distance indica tor
3 Set specified di stance
Pe rm anent status display of Active Di stance
Assist DIST RONIC
R k (white):Ac tive Dis tance Assi st
DISTRONIC selected, speci fied dis tance set
R k (green): Active Dis tance Assi st
DISTRONIC acti ve, specified dis tance set and
ve hicle de tected Driving and park
ing141

Note
s on noise or unusual handling charac‐
te rist ics
Make sure there are no vibrations, noises or
unusual handling characteristics when theve hi‐
cle is in motion. This may indicate that the
wheels or tyres are damaged. Hidden tyre dam‐
age could also be causing the unusual handling
ch aracteristics.
If yo u suspect that a tyre is defective, reduce
yo ur speed immediately and ha vethe tyres and
wheels checked at a qualified specialist work‐
shop. Note
s onregular lyinspecting wheels and
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. &
WARNING Risk of aquaplaning due to
insuf ficient tyre tread
Insu fficient tyre tread will result in reduced
tyre grip.
The risk of aquaplaning is increased on wet
ro ads, especially when the speed of theve hi‐
cle is not adap tedto suit the conditions. #
Thus, you should regularly check the
tread de pth and the condition of the
tyre contact su rface across the entire
width of all tyres.
Minimum tread dep thfor:
R Summer tyres: 3 mm
R M+S tyres: 4 mm #
For saf etyre asons, replace the tyres
before the legally-prescribed limit for
th e minimum tread dep thisreached. Car
ryout thefo llowing checks on all wheels reg‐
ularly, at least once a month or as requ ired, for
ex ample, prior toa long journey or driving off-
ro ad:
R Check the tyre pressure (/ page 322).
R Visually inspect wheels and tyres for dam‐
age.
R Check theva lve caps.
R Visual check of the tyre tread dep thand the
tyre contact su rface across the entire width.
The minimum tread dep thfor summer tyres
is 3 mm and for winter tyres 4 mm. Note
s on snow chains &
WARNING Risk of accident due toincor‐
re ct snow chain fitting
If yo u ha vefitted snow chains tothe front
wheels, the snow chains may drag against
th eve hicle body or chassis components.
This could cause damage totheve hicle or
th e tyres. Wheels and tyres
321

#
Neverfit snow chains on the front
wheels. #
Only fit snow chains on there ar wheels
in pairs. *
NO
TEDama getothe wheel trim from fit‐
te d snow chains If sn
ow ch ains are fitted tosteel wheels, the
wheel trims can be damaged. #
Remo vethe wheel trims of steel wheels
before fitting snow chains. Obse
rveth efo llowing no tes when using snow
ch ains:
R Snow ch ains are on ly permissible for cer tain
wheel/tyre combinations. You can obtain
information about this from a Mercedes-Benz
Service Cent re.
R For saf etyre asons, only use snow chainsthat
ha ve been specifically appr ovedfo ryo ur
ve hicle byMercedes-Benz, or snow chains
with the same quality standard. R
If sn ow ch ains are fitted, the maximum per‐
missible speed is 50 km/h.
R Vehicles with le vel control: if snowchains
are fitted, only drive at raised vehicle le vel.
% You can permanently limit the maximum
ve hicle speed for driving with winter tyres
(/ page 141).
% You can deactivate ESP ®
to pull away
( / page 135). This allo ws the wheels to
spin, achieving an increased driving forc e. Ty
re pressure Note
s on tyre pressure &
WARNING Risk of accident due toinsuf‐
fi cient or excessive tyre pressure
Underinflate d oroverinfla ted tyres pose the
fo llowing risks:
R The tyres may bur st, especially as the
load and vehicle speed increase. R
The tyres may wearexc essively and/or
une venly, which may greatlyimpair tyre
traction.
R The driving characteristics, as well as
st eering and braking, may be greatly
impaired. #
Comply with there commended tyre
pressure and check the tyre pressure of
all tyres including the spare wheel regu‐
larly:
R at least once a month
R when the load changes
R before embarking on a lon ger journey
R if operating conditions change, e.g. off-
ro ad driving #
Adjust the tyre pressure as necessar y. Ty
re pressure which is too high or too low can:
R Shor tenth e service life of the tyres.
R Cause increased tyre damage.
R Adversely af fect driving characteristics and
th us driving saf ety, e.g. due toaquaplaning. 322
Wheels and tyres

*
NO
TEPossible wheel and tyre damage
when parking on kerbs or in po tholes Pa
rking on kerbs or in po tholes may damage
th e wheels and tyres. #
If possible, park only on flat sur faces. #
Avoid kerbs and po tholes when parking. *
NO
TEDama getoelectronic component
parts from the use of tyre-fitting tools Ve
hicles with a tyre pressure monitoring
sy stem: electronic component parts are
located in the wheel. Tyre-fitting tools should
not be applied in the area of theva lve.
The tools could damage the electronic com‐
ponent parts. #
Have the tyres changed at a qualified
specialist workshop onl y. *
NO
TEDama getosummer tyres at low
ambient temp eratures At
low ambient temp eratures, tears could
fo rm when driving with summer tyres, caus‐
ing permanent damage tothe tyre. #
Attemp eratures below 7 °C, use M+S
tyres. Ac
cessory pa rts th at are not appr ovedfo ryo ur
ve hicle byMercedes-Benz or are not being used
cor rectly can impair the operating saf ety.
Before pu rchasing and using non-appr oved
accesso ries, visit a qualified specialist workshop
and enquire about:
R Suitability
R Legal stipulations
R Factory recommendations &
WARNING Risk of accident with high
per form ance tyres
There is an inc reased risk of skidding and
aquaplaning when using sport tyres on wet
ro ads. In addition,
the tyre grip is greatly reduced at
a low outside temp erature and tyre running
te mp erature. #
Activate ESP ®
and adapt your driving
st yle accordingly. #
Use M+S tyres at outside temp eratures
below 10°C. #
Only use the tyres forth eir intended
purpose. Obser
vethefo llowing when selecting, fitting and
re placing tyres:
R Countr y-specific requirements for tyre
appro valth at define a specific tyre type for
yo ur vehicle.
R Furthermore, the use of cer tain tyre types in
cer tain regions and areas of operation can
be highly beneficial.
R Only use tyres and wheels of the same type
(summer tyres, winter tyres, MOEx tended
tyres) and the same make.
R Only fit wheels of the same size on one axle
(left and right). Wheels and tyres
327

It is only permissible
tofit a di fferent wheel
size in theev ent of a flat tyre in order to
drive tothe specialist workshop.
R Do not make any modifications tothe brake
sy stem, the wheels or the tyres.
The use of shims or brake dust shields is not
permitted and may in validate theve hicle's
ge neral operating pe rmit.
R Vehicles with a tyre pressure monitoring
sy stem: allfitted wheels mu stbe equipped
with functioning sensors forth e tyre pres‐
sure monitoring sy stem.
R Attemp eratures below 7 °C use winter tyres
or all-season tyres mar ked M+S for all
wheels.
Wi nter tyres bearing thei snowflake
symbol in addition tothe M+S marking pro‐
vide the best possible grip in wintry road
conditions.
R For M+S tyres, only use tyres with the same
tread.
R Obser vethe maximum permissible speed for
th e M+S tyres fitted. If
th e tyre's maximum speed is below that of
th eve hicle, this must be indicated byan
appropriate label in the driver's field of
vision.
R Run in new tyres at moderate speeds forthe
fi rs t10 0 km.
R Replace the tyres af ter six years at the latest,
re ga rdless of wear.
R When replacing with tyres that do not
fe ature run-flat characteristics: vehicles
with MOExtended tyres are not equipped
with a TIREFIT kit at thefa ctor y.Equip the
ve hicle with a TIREFIT kit af terre placing with
tyres that do not feature run-flat characteris‐
tics, e.g. winter tyres.
% You can permanently limit the maximum
ve hicle speed for driving with winter tyres
(/ page 141).
Fo r more information on wheels and tyres, con‐
ta ct a qualified specialist workshop.
Be sure toalso obse rveth efo llowing fur ther
re lated subjects:
R Notes on tyre pressure (/ page 322)R
Tyre pressure table (/ page 323)
R Notes on the emer gency spa rewheel
(/ page 335) &
WARNING Risk of accident caused by
non-app rove d tyre types
If yo u use tyre types that ha venot been
adap tedto changes made tothefa ctory
speed limit, this can ha vethefo llowing con‐
sequences:
R The tyres are not suitable for high speeds
and the cor responding driving dynamics.
R The tyres wear une venly and af fect the
ro adwor thiness of theve hicle.
R ABS, ESP ®
and cruise contro l operation
are restricted.
This can jeopardise road saf ety. #
Only use tyre types that ha vebeen
appr ovedfo rth e maximum permissible
speed set and theve hicle. 328
Wheels and tyres

#
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.
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 340). &
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 conta iner.
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 ta345

Display messages
Possible causes/consequences and M MSolutions
Active Distance Assist cur-
rently unavailable See Own-
er's Manual *A
ctive Dis tance Assi stDISTRONIC is temp orarily una vailable.
The ambient conditions are outside the sy stem limits (/ page141). #
Drive on.
As soon as the ambient conditions are within the sy stem limits, the sy stem will become available again.
Active Distance Assist
available again *A
ctive Dis tance Assi stDISTRONIC is operational again and can be acti vated (/ page143).
ð Maximum speed exceeded *Y
ou ha veexceeded the maximum permissible speed (for cer tain countries only). #
Drive more slowl y.
Speed limit (winter tyres)
XXX km/h *Y
ou ha vereached the maximum permissible stored speed for winter tyres. It is not possible toexceed this speed.
ë
Off *T
he HOLD function is deactivated because theve hicle is slipping or a condition for activation is not fulfilled. #
Reactivate the HOLD function later or check the activation conditions forth e HOLD function (/ page145). 372
Displaymessa ges and warning/indicator lamps

Child seat in wrong position See
Owner's Manual
.................................. 350
Cruise contro l and Limiter inope ra‐
tive ...................................................... 370
Cruise contro l inoperative ................... 370
Cruise contro l off................................ 370
Electronic rear axle dif fere ntial lo ck
cur rently una vailable .......................... .358
Electronic rear axle dif fere ntial lo ck
inope rative .......................................... 357
Fr ont-passenger airbag disabled See
Owner's Manual ..................................3 49
Fr ont-passenger airbag enabled See
Owner's Manual ..................................3 49
Hazard warning lamps malfunction‐
ing ...................................................... .355
Limi ter inoperative ...............................3 71
Limiter passive .................................... 370
Mercedes me connect Services limi‐
te d See Owner's Manual .....................380N permanently active Risk of
vehicle
ro lling .................................................. 363
Only select Park (P) when vehicle is
st ationary ............................................ 362
PRE- SAFE inoperative See Owner's
Manual ................................................. 351
RACE START cancelled ......................... 375
RACE START not possible See Own‐
er's Manual .......................................... 375
Ra dar sensors dirty See Owner's
Manual ................................................ 380
Re duce speed ...................................... 386
Re versing not poss. Consult work‐
shop ....................................................3 63
Risk of vehicle rolling Driver door
open and transmission not in P ...........363
Speed limit (winter tyres) XXX km/h ...372
St op vehicle Lea veengine running
Wa itTransmission cooling ...................364 To
shift out of P or N,depress brake
and start engine .................................. 362
To switch off the engine, press
St art/ Stop button for at least 3 sec‐
onds or 3 times. .................................. 360
Tr af fic Sign Assi stCamera view
re stricted See Owner's Manual ............374
Tr af fic Sign Assi stcur rently una vaila‐
ble See Owner's Manual ......................374
Tr af fic Sign Assi stinope rative .............. 374
Tr ansmission Malfunction Stop ........... 364
Ty re press. monitor cur rently una vail‐
able .................................................... .383
Ty re press. monitor inoperative ...........383
Ty re press. monitor inoperative No
wheel sensors .................................... .384
Ty re(s) ove rheated ...............................3 85
Wi thout changing gear, consult work‐
shop ....................................................3 63 Index
413