2018 MERCEDES-BENZ AMG GT R-ROADSTER lane assist

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 320).
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 (/ page157)
R Active Brake Assi st
R Lane Keeping Assist (/ page167)
R ATTENTION ASSIST (/ page163)
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 (/ page158)
R Front and reve rsing camera (/ page161)
R RACE START (/ page 153)
R Cruise control (/ page143)
R Blind Spot Assi st (/ page 166)
R Traf fic Sign Assi st (/ page 164) 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

Fu
nction of ESP ®
Crosswind Assist ESP
®
Crosswind Assist de tects sudden gu sts of
side wind and helps the driver tokeep theve hi‐
cle in the lane:
R ESP ®
Crosswind Assist is active at vehicle
speeds between 80 km/h and 200 km/h
when driving stra ight ahead or cornering
slightly.
R The vehicle is stabilised bymeans of individ‐
ual brake application on one side. Fu
nction of EBD (Electronic Brake forc e Dis‐
tribution) EBD is
characterised bythefo llowing:
R Monitoring and regulating the brake pressure
on there ar wheels.
R Impr oved driving stability when braking,
especially on bends. Fu
nction of Active Brake Assi st Ac
tive Brake Assi stconsi sts of:
R Distance warning function
R Autonomous braking function
R Situation-dependent braking assi stance
Ac tive Brake Assi stcan help youto minimise the
ri sk of a collision with vehicles or toreduce the
ef fects of su cha collision.
If Ac tive Brake Assi sthas de tected a risk of colli‐
sion, a warning tone sounds and theL dis‐
ta nce warning lamp lights up in the instrument
clus ter.
If yo u do not react tothe visual or acoustic warn‐
ing, autonomous braking can be initiated in criti‐
cal situations.
In especially critical situations, Active Brake
Assi stcan initia teautonomous braking direct ly.
In this case, thewa rning lamp and warning tone
occur simultaneously wi th the braking applica‐
tion.
If yo u apply the brake yourself in a situation
de tected as critical byActive Brake Assi st, or apply
the brake during autonomous braking, sit‐
uation-dependent braking assis tance occu rs.
The brake pressure increases up tomaximum
full-s top braking if necessar y.
If th e autonomous braking function or the situa‐
tion-dependent braking assis tance is trig gered,
additional pr eventive measures for occupant
pr otection (PRE-SAFE ®
) may also be initiated, if
th eve hicle is equipped with these. &
WARNING Risk of an accident caused by
limited de tection per form ance of Active
Brake Assi st
Ac tive Brake Assi stcannot al ways clearly
identify objects and compl extraf fic situa‐
tions.
In su chcases, Active Brake Assi stmight:
R Give a warning or brake without reason
R Not give a warning or not brake #
Alw ays pay careful attention tothe traf‐
fi c situation; do not rely on Active Brake
Assi stalone. Active Brake Assi stis only
an aid. The driver is responsible for 14 0
Driving and pa rking

Ac
tive Di stance Assist DISTRO NICFu
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-saving, comfort‐
able or dynamic) (/ page119)
R Initiates ac celerationtothestored speed if
th e turn signal indicator is switched on to
ch ange totheove rtaking lane.
Ac tive Dis tance Assi stDISTRONIC is only an aid.
The driver is responsible forke eping a safe dis‐
ta nce totheve hicle in front, forve hicle speed
and for braking in good time.
Sy stem limitations
The sy stem may be impaired or may not function
in thefo llowing ins tances:
R In sno w,rain, fog, heavy spr ay, if there is
gl are, in direct sunlight or in greatlyvarying
light conditions.
R The windsc reen in the area of the camera is
dirty, mis ted up, damaged or co vered.
R Ifth era dar sensors are dirty or co vered. R
In multi- stor ey car pa rks or on roads with
st eep uphill or downhill gradients.
R Ifth ere are nar rowvehicles in front, such as
bicycles or mo torcyc les.
In addition, on slippery roads, braking or accel‐
erating can cause one or se veral wheels tolose
traction and theve hicle could then skid.
Do not use Active Dis tance Assi stDISTRONIC in
th ese situations. &
WARNING Risk of accident from acceler‐
ation or braking byActive Dis tance
Assi stDISTRONIC
Ac tive Dis tance Assi stDISTRONIC may accel‐
erate or brake in thefo llowing cases, for
ex ample:
R Ifth eve hicle pulls away using Active Dis‐
ta nce Assi stDISTRONIC.
R Ifth estored speed is called up and is
considerably faster or slo werth an the
cur rently driven speed. Driving and pa
rking 147

R
IfAc tive Dis tance Assi stDISTRONIC no
longer de tects a vehicle in front or does
not react toreleva nt objects. #
Alw ays carefully obser vethe traf fic con‐
ditions and be ready tobrake at all
times. #
Take into account the tra ffic situation
before calling up thestored speed. &
WARNING Risk of accident due toinsuf‐
fi cient decele ration byActive Dis tance
Assi stDISTRONIC
Ac tive Dis tance Assi stDISTRONIC brakes
yo ur vehicle with up to50 % of the maximum
possible deceleration. If this decele ration is
not su fficient, Active Dis tance Assi st
DISTRONIC alerts you with a visual and
acoustic warning. #
Inthese cases, adjust your speed and
ke ep a suf ficient di stance. #
Brake theve hicle yourself and/or take
ev asive action. &
WARNING Risk of accident if de tection
function of Active Dis tance Assi st
DISTRONIC is impaired
Ac tive Dis tance Assi stDISTRONIC does not
re act or has a limited reaction:
R when driving on a dif fere nt lane or when
ch anging lanes
R topedestrians, animals, bicycles or sta‐
tionary vehicles, or unexpected obs tacles
R tocompl extraf fic conditions
R tooncoming vehicles and crossing traf fic
As a result, Active Dis tance Assi st
DISTRONIC may nei ther give warnings nor
inter vene in su chsituations. #
Alw ays obser vethe tra ffic conditions
carefully and react accordin gly. Operating
Active Di stance Assist DIST RONIC
Re quirements:
R The vehicle has been star ted.
R The elect ric pa rking brake is released. R
ESP ®
is activated and is not inter vening.
R The transmission is in position h.
R All doors and the bonn etare closed.
R Check of thera dar sensor sy stem has been
successfully comple ted.
R Parking Assist PARKTRONIC is not being
used topark theve hicle or toexit from a
parking space.
R The vehicle does not skid. 14 8
Driving and pa rking

1
Front camera, wide-angle view
2 Front camera, standard view
3 Reversing camera, standard view
4 Reversing camera, wide-an gle view
Dynamic guide lines in the camera image show
th e path theve hicle will take with thesteering
wheel in its cur rent position. This helps youto
orient yourself and toavoid obs tacles when
manoeuvring. 1
Yellow lane marking the course the tyres will
ta ke atthe cur rent steering wheel angle
(dynamic)
2 Yellow guide line, vehicle width (driven sur‐
fa ce) depending on the cur rent steering
wheel angle (dynamic)
3 Red guide line at a dis tance of appr oximately
0.3 m from there ar area
4 Mark at a dis tance of appr ox.1. 0 m
When Parking Assist PARKTRONIC is operational
and no object is de tected, the segments of the
wa rning display are shown in grey.
% Ifth e entire sy stem fails, the segments of
th ewa rning display are shown in red and the é
symbol appears inthe multifunction
display in the instrument clus ter.
If Pa rking Assist PARKTRONIC is deacti vated,
th ewa rning display fades out.
Sy stem limits
The cameras will not function or will only parti‐
ally function in thefo llowing situations:
R There is heavy rain, snow or fog.
R The light conditions are poor, e.g. at night.
R The respective camera lens is obstructed,
dirty or mis ted up. Obser vethe no tes on
cleaning the cameras (/ page 320).
R Cameras, or vehicle components in which
th e cameras are fitted, are dama ged. In this
eve nt, ha vethe cameras, their positions and
th eir setting checked at a qualified specialist
wo rkshop.
The field of vision and other functions of the
re ve rsing camera may be restricted due toaddi‐
tional accesso ries (e.g. licence plate brac ket or
bicycle rack ). 16 2
Driving and pa rking

If
AT TENTION ASSIST is unable tocalculate the
attention le vel and cannot issue a warning, the
System suspended messageappears.
If a warning is given in the instrument displa y,
th e multimedia sy stem of fers to sear chfor a rest
area. You can select a rest area and start naviga‐
tion tothis rest area. This function can be activa‐
te d and deactivated in the multimedia sy stem.
If AT TENTION ASSIST is deactivated, theé
symbol appears in the assis tance graphic in the
instrument display when the engine is running.
AT TENTION ASSIST is activated automatically
when the engine is re-sta rted. The last selected
sensitivity le velre mains stored.
Sy stem limitations
AT TENTION ASSIST is active in the 60 km/h to
200 km/h speed range.
The functionality of ATTENTION ASSIST is
re stricted, and warnings may be dela yed or not
occur at all in thefo llowing situations:
R Ifyo u ha vebeen driving for less than appr ox‐
imately 30 minutes. R
Ifth ero ad condition is poor (une venro ad
sur face or po tholes).
R Ifth ere is a strong side wind.
R Ifyo u adopt a sporty driving style (high cor‐
nering speeds or high rates of acceleration).
R Ifth e time has been set incor rectl y.
R In active driving situations, if youch ange
lanes and vary your speed frequentl y.
The ATTENTION ASSIST tiredness or alertness
assessment is dele ted and restar ted when con‐
tinuing the journey in thefo llowing situations:
R Ifyo u swit choff the engine.
R Ifyo u unfas tenyo ur seat belt and open the
driver's door (e.g. changing drivers or taking
a break).
Setting ATTENTION ASSI ST
Multimedia sy stem:
4 Vehicle 5
k Assistance
5 ATTENTION ASSIST
Setting options #
Select Standard, SensitiveorOff. Suggesting a
rest area #
Select Suggest rest area . #
Activate Oor deacti vate the function ª.
If AT TENTION ASSIST de tects fatigue or
increasing la ckof attention, it suggests a
re st area in the vicinit y. #
Select a sugges tedre st area: you are gui‐
ded tothe selected rest area. Tr
af fic Sign Assist Fu
nction of Traf fic Sign Assist
Tr af fic Sign Assi stdetects traf fic signs wi thmul‐
tifunction camera 1. It assistsyo uby display‐
ing de tected speed limits and overtaking restric‐
tions in the instrument clus ter.
Since Traf fic Sign Assi stalso uses the data
st ored in the navigation sy stem, it can update
th e display in thefo llowing situations without
de tecting traf fic signs:
R When theve hicle changes roads, e.g. slip
ro ad or mo torw ay ex it. 16 4
Driving and pa rking

R
Ifth e windscreen in the area of the multi‐
function camera is dirty, or if the camera is
mis ted up, damaged or co vered.
R Ifth e traf fic signs are ha rdtodetect, e.g. due
to dirt or sno w,or because they are co vered
or due toinsuf ficient lighting.
R Ifth e information in the navigation sy stem's
digital map is incor rect or out-of-da te.
R Ifth e signs are ambiguous, e.g. tra ffic signs
on con stru ction sites or in adjacent lanes.
R Ifyo u turn sharpl y,when passing traf fic signs
outside the camera's field of vision.
Setting Traf fic Sign Assist
Multimedia sy stem:
4 Vehicle 5
k Assistance
5 Traffic Sign Assist
Displaying de tected traf fic signs in the
medi a display #
Select Display in COMAND. #
Activate Oor deacti vate ª the function. Blind Spot Assist
Fu
nction of Blind Spot Assist
Blind Spot Assist uses two lateral, rear-facing
ra dar sensors tomonitor the area up to3 m
behind and next toyour vehicle.
If a vehicle is de tected at speeds ab ove appr ox‐
imately 30 km/h and this vehicle subsequently
enters the monitoring range next to yourvehicle,
th ewa rning lamp in the outside mir ror lights up
re d.
If a vehicle is de tected close tothe side of your
ve hicle, there dwa rning lamp in the outside mir‐
ro rflashes. If you swit chon the turn signal indi‐
cator in the cor responding direction, a warning
to ne sounds once. If the turn signal indicator
re mains switched on, all other de tected vehicles
are indicated only bytheflashing of thered
wa rning lamp.
If yo uove rtake a vehicle quickl y,no warning is
given. &
WARNING Risk of accident despi teBlind
Spot Assi st
Blind Spot Assi stdoes not react tovehicles
approaching and overtaking you at a greatly
di fferent speed.
As a result, Blind Spot Assist cannot warn
drivers in this situation. #
Alw ays pay careful attention tothe traf‐
fi c situation and maintain a safe dis‐
ta nce at the side of theve hicle. Blind Spot Assist is only an aid. It may
failto
de tect some vehicles and is not a substitute for
attentive driving. Alw ays ensure that there is suf‐
fi cient di stance tothe side forot her road users
and obs tacles.
Sy stem limitations
The sy stem may be limited in thefo llowing situa‐
tions:
R The sensors are dirty or co vered.
R Poor visibility, e.g. due tofog, heavy rain,
snow or spr ay. 16 6
Driving and pa rking

R
Narrow vehicles, e.g. bicycles, are within the
monitoring range.
Wa rnings may be issued in er ror when driving
close tocrash ba rriers or similar solid lane bor‐
ders. Warnings may be inter rupte d when driving
alongside long vehicles, forex ample lor ries, for a
prolonged time.
Blind Spot Assist is not operational when reve rse
ge ar is engaged.
Ac tivating/deactivating Blind Spot Assi stor
Ac tive Blind Spot Assi st
Multimedia sy stem:
4 Vehicle 5
k Assistance
5 Blind Spot Assist #
Activate Oor deacti vate ª the function. Lane
Keeping Assist Fu
nction of Lane Keeping Assist Lane
Keeping Assist monitors the area in front of
yo ur vehicle bymeans of multifunction camera
1. It ser vesto protect you against unin tention‐
ally le aving your lane. You will be warned by
means of a vibration in thesteering wheel.
Yo u are warned byvibration pulses in thesteer‐
ing wheel in thefo llowing circums tances:
R Lane Keeping Assist de tects lane markings.
R A front wheel passes over the lane markings. Whe
ther a warning is issued and when this
occurs also depends on the selected sensitivity
setting (s tanda rdor adaptive).
Lane Keeping Assist can neither reduce therisk
of an accident if youfa ilto adapt your driving
st yle nor override the la wsof ph ysics. It cannot
ta ke into account road, weather or traf fic condi‐
tions. Lane Keeping Assist is only an aid. You are
re sponsible for maintaining a safe dis tance to
th eve hicle in front, forve hicle speed, for braking
in good time and forst ay ing in lane.
Lane Keeping Assist is available in the speed
ra nge between 60 km/h and 200 km/h.
Sy stem limitations
The sy stem may be impaired or may not function
in thefo llowing situations:
R Ifth ere is poor visibility, e.g. due toinsuf fi‐
cient illumination of thero ad, if there are
highly variable shade conditions or in rain,
sno w,fog or heavy spr ay.
R Ifth ere is glare, e.g. from oncoming traf fic,
th e sun or reflections. Driving and parking
167