traction control MERCEDES-BENZ AMG GT ROADSTER 2018 Owners Manual

and do not
relie ve you of your responsibility per‐
ta ining toroad traf fic la w.Pay attention tothe
traf fic conditions at all times and inter vene
when necessa ry. Be aware of the limitations
re ga rding the safe use of these sy stems. Information about
radar senso rs Some driving and driving sa
fety sy stems use
ra dar sensors tomonitor the area in front of,
behind or next totheve hicle (depending on the
ve hicle's equipment).
Depending on theve hicle's equipment, thera dar
sensors are integrated behind the bumpers
and/or behind the Mercedes star. Keep these
parts free of dirt, ice and slush (/ page 260).
The sensors must not be co vered, forex ample
by cycle rack s, overhanging loads, sticke rs,fo il
or foils toprotect against stone chipping. In the
eve nt of dama getothe bumpers or radiator
grille, or following a collision impacting the
bumpers or radiator grille, ha vethe function of
th era dar sensors checked at a qualified special‐
ist workshop. The driver assis tance sy stem may
no longer workproperly. Overview of driving sy
stems and driving
saf ety sy stems In
this section, you will find information about
th efo llowing driving sy stems and driving saf ety
sy stems:
R ABS (A nti-lock Braking System)
(/ page 136)
R Active Dis tance Assi stDISTRONIC
(/ page 147)
R Adaptive Brake Lights (/ page142)
R AMG RIDE CONTROL (/ page156)
R Active Brake Assi st
R Lane Keeping Assist (/ page163)
R ATTENTION ASSIST (/ page161)
R BAS (Bra keAssist System) (/ page137)
R Hill Start Assist (/ page151)
R EBD ( Electronic Brakeforce Distribution)
(/ page 140)
R ESP ®
(Electronic Stability Program)
(/ page 137)
R HOLD fu nction (/ page 151) R
Limi ter (/ page144)
R Parking Assist PARKTRONIC (/ page157)
R Front and reve rsing camera (/ page159)
R RACE START (/ page 153)
R Cruise control (/ page 143)
R Blind Spot Assist (/ page162) Fu
nction of ABS (Anti-lock Braking Sy stem) ABS
regulates the brake pressure in critical driv‐
ing situations:
R During braking, e.g. at full brake application
or insuf ficient tyre traction, the wheels are
pr eve nted from lo cking.
R Vehicle steerability while braking is ensured.
If ABS inter venes when braking, you will feel a
pulsing in the brake pedal. The pulsating brake
pedal can be an indication of hazardous road
conditions and can ser veas a reminder totake
ex tra care while driving. 13 6
Driving and pa rking

handling mode or
was deactivated before the
engine was switched off.
ESP ®
is inter vening if the ESP ®
÷ warning
lamp flashes in the instrument clus ter:
R Do not deacti vate ESP ®
.
R Only depress the accelera tor pedal as far as
is necessar y.
R Adapt your driving style to suit the cur rent
ro ad and weather conditions.
Cha racteristics of activated SPORT handling
mode &
WARNING Risk of skidding due toincor‐
re ct application of SPORT handling mode
When you activate SPORT handling mode,
th ere is an increased risk of skidding and
having an accident. #
Only activate SPORT handling mode in
the circums tances described as follo ws. Select SPORT handling mode when
theve hicle's
ow nov ersteering and under steering characteris‐ tics are desired,
forex ample when driving on
specially designated roads.
On lya high ly qualified and experienced driver
should drive in SPORT handling mode or with
ESP ®
deactivated.
If SPORT handling mode is activated and one or
more wheels start tospin, the÷ ESP®
wa rn‐
ing lamp in the instrument clus terflashes. ESP ®
th en only stabilises theve hicle toa limited
deg ree.
If SPORT handling mode is activated:
R ESP ®
only impr oves driving stability toa limi‐
te d deg ree.
R ETS/4ETS traction control is still active.
R The engine's torque is on lyrestricted to a
limited degree and the drive wheels can spin.
The spinning of the wheels results in a cut‐
ting action for better traction on loose sur fa‐
ces.
R ESP ®
continues toprov ide assis tance when
th e brakes are firm lyapplied. Cha
racteristics when ESP ®
is deactivated &
WARNING Risk of skidding if ESP ®
is
deactivated
If yo u deactivate ESP ®
, ESP ®
cannot car ry
out vehicle stabilisation. #
ESP ®
should on lybe deactivated in the
fo llowing situations. ESP
®
is deactivated if theå ESP®
OFF warn‐
ing lamp lights up continuously in the instrument
clus ter:
R Driving stability will no lon ger be impr oved.
R Crosswind Assist is no longer active.
R The drive wheels could spin.
R ETS/4ETS traction control is still active.
% Even when ESP ®
is deactivated, you are still
assis tedby ESP ®
when braking ha rd.
In thefo llowing situations, it may be better to
activate SPO RThandling mode or deactivate
ESP ®
:
R When using snow chains. 13 8
Driving and pa rking

R
In deep sno w.
R On sand or gra vel.
% Spinning the wheels results in a cutting
action which pr ovides better grip.
% Activate ESP ®
as soon as the situations
described abo veno longer apply. ESP ®
will
ot herwise not be able tostabilise theve hicle
if th eve hicle starts toskid or a wheel starts
to spin.
If th e÷ ESP®
wa rning lamp lights up continu‐
ousl y,ESP ®
is not available due toa malfunction.
Obse rve any information which may be displa yed
in the instrument clus ter:
R Warning and indicator lamps (/ page 357)
R Display messages (/ page316)
ETS/4ETS (Elect ronic Traction Sy stem)
ETS/4E TStraction control is pa rtof ESP ®
.
ETS/4ETS can impr ovetheve hicle's traction by
inter vening in thefo llowing ways:
R The drive wheels are braked individually if
th ey spin. R
More drive torque is transferred tothe wheel
or wheels with traction. Ac
tivating/deactivating ESP ®
(Electronic Sta‐
bility Prog ram) #
Toactivate ESP ®
SPORT: press and hold
display button 1until thero ad in button
symbol 2lights up yello w.
The ESP SPORT message is shown in the
instrument clus ter and theå and
ESP SPORT warning lamps light up. #
Todeactivate ESP ®
:press and hold displ ay
button 1until thero ad in button symbol 2
lights up red.
The ESP OFF message is shown in the instru‐
ment clus ter and theå andESP OFF
wa rning lamps light up. #
Toactivate ESP ®
:press and hold display
button 1until thero ad in button symbol 2
lights up blue.
The å andESP OFF orESP SPORT warn‐
ing lamps in the instrument clus ter go out.
When the÷ symbol 2is shown with a red!
on display button 1, ESP®
is malfunctioning.
Obser vethe information on warning lamps and
display messages which may be shown in the
instrument clus ter. Driving and pa
rking 13 9

This pr
ovides traf fic tr ave lling behind you with an
eve n more noticeable warning.
If th eve hicle is tr avelling at speeds of more than
70 km/h at the beginning of the brake applica‐
tion, the hazard warning lights switch on once
th eve hicle is stationar y.When you pull away
again, the hazard warning lights will switch off
automatically at appr oximately 10km/h. Yo u
can also switch off the hazard warning lights
using the hazard warning button. Cruise control and limiter
Fu
nction of cruise control
Cruise cont rolre gulates the speed totheva lue
selec tedby the driver.
If yo u accelerate toove rtake, forex ample, the
st ored speed is not dele ted. If youre mo veyour
fo ot from the accelerator pedal af terove rtaking,
cruise control will resume speed regulation back
to thestored speed.
Cruise contro l is operated using the cor respond‐
ing steering wheel buttons. You can store any
speed abo ve30 km/h up tothe maximum speed
or up tothe set winter tyre limit. If
yo ufa ilto adapt your driving style, cruise con‐
trol can neither reduce therisk of an accident
nor override the la wsof ph ysics. It cannot take
into account road, weather or traf fic conditions.
Cruise control is only an aid. You are responsible
fo r maintaining a safe dis tance totheve hicle in
front, forve hicle speed, for braking in good time
and forst ay ing in lane.
Displa yson the multifunction display
The status of cruise control and thestored
speed are shown in the multifunction displa y. 1
Cruise cont rol is selec ted
2 Speed is sa ved, cruise control is deactivated
3 Speed is sa ved, cruise control is activated %
The segments extending from the cur rent
st ored speed tothe end of the scale, or to
th e set winter tyre limit, light up in the
speedome ter.
Sy stem limitations
Cruise control may be unable tomaintain the
st ored speed on uphill gradients. The stored
speed is resumed when the gradient evens out.
Change into a lo werge ar in good time on long
and steep downhill gradients. Take particular
no te ofthis when driving a laden vehicle. By
doing so, you will make use of the engine's brak‐
ing ef fect. This relie vesth e load on the brake
sy stem and pr events the brakes from overheat‐
ing and wearing tooqu ickl y.
Do not use cruise control in thefo llowing situa‐
tions:
R In traf fic situations whi chrequ ire frequent
ch anges of speed, e.g. in heavy traf fic, on
winding roads.
R On slippe ryroads. Accelerating can cause
th e drive wheels tolose traction and the
ve hicle could then skid.
R Ifyo u are driving when visibility is poor. Driving and parking
14 3

If
yo u press displ aybutton 1again during
re traction, there ar wing will extend again.
The di fferent positions of there ar wing are also
shown on the instrument clus ter. AMG RIDE CONTROL
Fu
nction of AMG RIDE CONTROL
AMG RIDE CONTROL is an electronically control‐
led damping sy stem for impr oved driving com‐
fo rt and inc reased driving saf ety.
The damping is adjus ted individually toeach
wheel and depends on thefo llowing factors:
R the driving style, e.g. sporty
R thero ad condition, e.g. bumps
R the individual selection of Sport, Sport+ or
Comfort
% The mode can also be set using the
DY NA MIC SELECT switch. Todo this, the
same suspension tuning must be selected
fo r AMG RIDE CONTROL and theDY NA MIC
SELECT switch. %
When theve hicle is star ted again, the "Com‐
fo rt" setting is activated automaticall y.
AMG RIDE CONTROL, selecting the suspen‐
sion tuning
Yo u can select from thre e dif fere nt suspension
tunings:
R COMFORT ensures a comfor table suspen‐
sion tuning. Select this suspension tuning if
yo u prefer a comfor table driving style.
R SPORT ensures a firm er suspension tuning.
Select this suspension tuning when employ‐
ing a sporty driving style, e.g. on winding
count ryroads.
R SPORT PLUS ensures avery firm suspension
tuning. #
Press display button 1.
The display button sho wscurrently selected
suspension setting 2:
R à C(blue): COMFORT
R à S(yellow): SPORT
R à S+(red): SPORT PLUS 15 6
Driving and pa rking

Obser
vethefo 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, on lyuse sn ow 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 146).
% You can deactivate ESP ®
to pull away . This
allo ws th e wheels tospin, 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
Underinfla ted or overinfla 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. &
WARNING Risk of accident from repea‐
te d tyre pressure drop
If th e tyre pressure drops repeatedly, the
wheel, valve or tyre may be damaged.
Insuf ficient tyre pressure can cause the tyres
to bur st. #
Inspect the tyre for signs of fore ign
objects. #
Check whe ther the wheel or valve has a
leak. 286
Wheels and tyres

Display messages
Possible causes/consequences and M
MSolutions
No tes on flat tyres (/ page 266). #
Stop theve hicle, paying attention toroad and traf fic conditions. #
Check the tyres.
h Check tyre(s) *T
he tyre pressure in one or more tyres has dropped significantl y.The wheel position is displa yed. &
WARNING Risk of an accident due toinsuf ficient tyre pressure
Ty res with insuf ficient tyre pressure pose thefo 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 greatly impair tyre traction.
R ‑ The driving characteristics, steering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. #
Obser vethere commended tyre pressures. #
Adjust the tyre pressure if necessar y. #
Stop theve hicle, paying attention toroad and traf fic conditions. #
Check the tyre pressure (/ page 286) andthe tyres. 344
Displaymessa ges and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions
Á Key not detected (white
display message) *T
hekey is cur rently und etected. #
Change the location of theke y in theve hicle. #
Ifth eke y is still not recognised, start the engine with theke y in the slot (/ page113).
Á Cha nge key batteries *T
hekey bat tery is dischar ged. #
Replace the battery (/ page 58).Ve
hicle Display messages
Possible causes/consequences and M
MSolutions Traction Control inopera-
tive See Owner's Manual
*T
he traction contro l is malfunctioning. #
Consult a qualified specialist workshop. 348
Displaymessa ges and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions #
Ensure that the cause of the bloc kage has been remo ved. #
Switch off the engine and lock theve hicle. #
Start theve hicle af ter a few minutes.
The rear wing mo vesto the initial position.
If th e problem persists or the cause cann otbe de tected: #
Consult a qualified specialist workshop.
Rear spoiler control sys-
tem inoperative *T
herear wing cannot reach the end position during retraction and extends again if possible.
If re traction of there ar wing is bloc ked, e.g. byice: #
Ensure that the cause of the bloc kage has been remo ved. #
Switch off the engine and lock theve hicle. #
Start theve hicle af ter a few minutes.
The rear wing mo vesto the initial position.
If th e problem persists or the cause cann otbe de tected: #
Consult a qualified specialist workshop.
M *T
he bonnet is open. &
WARNING Risk of accident due todriving with the engine bonn etunlo cked
An unloc ked engine bonn etmay open up when theve hicle is in motion and block your vie w. 350
Display messages and warning/indicator lamps

Ty
res Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
h Ty re pressure monitoring
sy stem warning lamp lights
up The
yellow tyre pressure monitoring sy stem warning lamp (pressure loss/malfunction) is lit.
The tyre pressure monitoring sy stem has de tected tyre pressure loss in at least one of the tyres. &
WARNING Risk of an accident due toinsuf ficient tyre pressure
Ty res with insuf ficient tyre pressure pose thefo 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 greatly impair tyre traction.
R ‑ The driving characteristics, steering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. #
Obser vethere commended tyre pressures. #
Adjust the tyre pressure if necessar y. #
Stop theve hicle, paying attention toroad and traf fic conditions. #
Check the tyre pressure and the tyres. Display messages and
warning/indicator lamps 369