brake sensor MERCEDES-BENZ AMG GT ROADSTER 2020 Owners Manual

Mercedes-Benz GenuineParts
+ ENVIRONMENTAL
NOTEEnvironmental
dama gecaused bynot using recycled
re conditioned components Mercedes-Benz
AGoffers recycled recondi‐
tioned components and pa rts with the same
qu ality as new parts. The same entitlement
from the implied warranty is valid as for new
parts. #
Recycled reconditioned components
and pa rts from Mercedes-Benz AG.*
NO
TEImpairment of the operating ef fi‐
ciency of there stra int sy stems from
ins talling accessory parts or from repairs
or we lding Airbags and seat belt
tensioners, as well as
control units and sensors forth ere stra int
sy stems, may be ins talled in thefo llowing
areas of your vehicle:
R doors R
door pillars
R door sills
R seats
R cockpit
R instrument clus ter
R centre console
R late ra lro of frame #
Do not ins tall accessory parts such as
audio sy stems in these areas. #
Do not car ryout repairs or welding. #
Have accesso ries retrofitted at a quali‐
fi ed specialist workshop. Yo
u could jeopardise the operating saf ety of your
ve hicle if you use parts, tyres and wheels as well
as accessories releva nt tosaf ety which ha venot
been appr ovedby Mercedes-Benz. Saf ety-re le‐
va nt sy stems, e.g. the brake sy stem, may mal‐
function. Only use Mercedes-Benz GenuineParts
or parts of equal qualit y.Only use tyres, wheels
and accessory parts that ha vebeen specifically
appr ovedfo ryo ur vehicle model. Mercedes-Benz
tests original parts and con ver‐
sion parts and accessory parts that ha vebeen
specifically appr ovedfo ryo ur vehicle model for
th eir reliability, saf ety and suitabilit y.Despite
ongoing ma rket resear ch, Mercedes-Benz is
unable toassess other parts. Mercedes-Benz
th erefore accepts no responsibility forth e use of
such parts in Mercedes-Benz vehicles, even if
th ey have been of ficially appr oved or independ‐
ently appr oved byate sting centre.
Cer tain parts are only of ficially appr ovedfor
ins tallation or modification if they comply wi th
legal requirements. All Mercedes-Benz Genuine‐
Pa rts meet the appr oval requ irements. The use
of non-appr oved parts may in validate theve hi‐
cle's general operating pe rmit.
This is the case in thefo llowing situations:
R theve hicle type is dif fere nt from that for
which theve hicle's general operating pe rmit
wa s granted.
R other road users could be endangered.
R theex haust gas or noise le velge ts wo rse. 20
General no tes

In
general, this information documents thest ate
of a component part, a module, a sy stem or the
sur roundings such as:
R operating status of sy stem components (e.g.
fi ll le vels, battery status, tyre pressure)
R status messages concerning theve hicle or
its individual components (e.g. number of
wheel revo lutions/speed, longitudinal accel‐
eration, lateral acceleration, display of fas‐
te ned seat belts)
R malfunctions or faults in impor tant sy stem
components (e.g. lights, brakes)
R information on events leading tovehicle
damage
R system reactions in special driving situations
(e.g. airbag deployment, inter vention of sta‐
bility control sy stems)
R ambient conditions (e.g. temp erature, rain
sensor)
In addition toprov iding the actual control unit
function, this data assists the manufacturer in
de tecting and rectifying faults and optimising
ve hicle functions. The majority of this data is te
mp orary and is only processed in theve hicle
itself. Only a small portion of the data is stored
in theeve nt or fault memor y.
When your vehicle is serviced, tech nical da ta
from theve hicle can be read out byservice net‐
wo rkemplo yees (e.g. workshops, manufactur‐
ers) or third parties (e.g. breakdown services).
Services include, forex ample, repair services,
maintenance processes, warranty claims and
qu ality assurance measures. The read out is per‐
fo rm ed via the legally prescribed port forthe
diagnostics connection in theve hicle. The
re spective service network locations or third
parties collect, process and use the data. They
document tech nical statuses of theve hicle,
assist in finding faults and impr oving quality and
are transmitted tothe manufacturer, if neces‐
sar y.Fu rthermore, the manufacturer is subject
to product liability. Forth is, the manufacturer
requ irestech nical da tafrom vehicles.
Fa ult memories in theve hicle can be reset by a
service outlet as part of repair or maintenance
wo rk. Depending on
the selected equipment, you can
import data into vehicle con venience and info‐
ta inment functions yourself.
This includes, forex ample:
R multimedia data such as music, films or pho‐
to sfo r playback in an integrated multimedia
sy stem
R address book data for use in connection with
an integrated hands-free sy stem or an inte‐
grated navigation sy stem
R entered navigation destinations
R data about the use of internet services
This data can be sa ved locally in theve hicle or it
is located on a device which you ha veconnected
to theve hicle (e.g. a smartphone, USB flash
drive or MP3 pla yer). If this data is stored in the
ve hicle, you can dele teit at any time. This data
is sent tothird parties only at your requ est, par‐
ticular lywhen you use online services in accord‐
ance with the settings that you ha veselected.
Yo u can store or change con venience settings/
individualisations in theve hicle at any time. 30
General no tes

R
allow the engine toreach a maximum engine
speed of 4,500 rpm on lybrief ly.
R drive theve hicle in drive program A.
R change gear before there v counter needle is
Ô ofthewa yto there d area of there v coun‐
te r.
R do not shift down a gear manually in order to
brake.
R avoidoverstra ining theve hicle, e.g. driving at
full thro ttle.
R do not depress the accelera tor pedal past
th e pressure point (kickdown).
R only increase the engine speed gradually and
accelera tetheve hicle tofull speed af ter
1, 500 km.
This also applies when the engine or parts of the
driv etra in ha vebeen replaced.
Please also obser vethefo llowing running-in
no tes:
R in cer tain driving and driving saf ety sy stems,
th e sensors adjust automatically while a cer‐
ta in dis tance is being driven af terth eve hicle
has been delivered or af terre pairs. Full sys‐ te
m ef fectiveness is not reached until the
end of this teach-in process.
R brakepads, brake discs and tyres that are
either new or ha vebeen replaced only ach‐
ie ve optimum braking ef fect and grip af ter
se veral hundred kilom etre s of driving. Com‐
pensate forth ere duced braking ef fect by
applying greaterfo rc eto the brake pedal. Note
s on engine output and engine torq ue %
The actual (maximum) values that can be
achie vedfo r engine output and engine tor‐
qu e may deviate from the certified values
within the count ry-specific guidelines for
permissible tolerances (basis: UN-ECE No.
85 or country -specific guidelines).
Fa ctors that can influence this are, forex am‐
ple:
R sea le vel
R fuel grade
R outside temp erature
R operating temp erature of the engine Unti
lth e engine has reached its operating tem‐
perature, thefo llowing engine operating temp er‐
ature warning lamp is lit: Engine output and engine
torque ha vebeen
re duced. Take this into account foryo ur driving
st yle.
When the engine operating temp erature warning
lamp goes out, full engine output and engine tor‐
qu e are available. Note
s on driving &
WARNING Risk of accident due to
objects in the driver's foot we ll
Objects in the driver's foot we ll may impede
pedal tr avel or block a depressed pedal.
This jeopardises the operating and road
saf ety of theve hicle. 108
Driving and pa rking

Information on
vehicle sensors and cameras 1
Multifunction camera
2 Front camera
3 Ultrasonic sensors
4 Reversing camera
% Depending on theve hicle's equipment, the
ra dar sensors are integ rated behind the
bumpers and/or behind thera diator grille. Some driving and driving saf
ety sy stems use
cameras and sensors tomonitor the area in
front of, behind or next totheve hicle.
Ke ep the areas around the sensors and cameras
free of dirt, ice or slush (/ page241). The cam‐
eras and sensors must not be co vered, forex am‐
ple bybicycle rack s, overhanging loads, sticke rs,
fo il or foils toprotect against stone chipping.
Ad ditional licence plate brac kets can impair the
function of the ultrasonic sensors, in particular.
In theeve nt of damage or a severe impact in the
area of the sensors, ha vethe function of the
sensors checked at a qualified specialist work‐
shop. Ha vedamage or stone chipping in the area
of the cameras repaired at a qualified specialist
wo rkshop. If the sensors or cameras are dam‐
aged, some driving sy stems and driving saf ety
sy stems may no longer function proper ly. Overview of driving sy
stems and driving
saf ety sy stems R
ABS (Anti-lo ckBra king System)
(/ page 133)
R BAS (Bra keAssist System) (/ page133) R
ESP ®
(Electronic Stability Program)
(/ page 133)
R EBD ( Electronic Brakeforc eDistribution)
(/ page 136)
R Active Brake Assi st (/ page 136)
R Adaptive Brake Lights (/ page138)
R Cruise control (/ page 138)
R Limi ter (/ page139)
R Active Dis tance Assi stDISTRONIC
(/ page 141)
R Hill Start Assist (/ page145)
R HOLD fu nction (/ page 145)
R RACE START (/ page 146)
R AMG RIDE CONTROL (/ page149)
R Front and reve rsing camera (/ page152)
R ATTENTION ASSIST (/ page154)
R Blind Spot Assi st (/ page 156)
R Lane Keeping Assist (/ page157) 13 2
Driving and pa rking

The dis
tance warning function issues a warning
at speeds:
R From appr oximately 30 km/h, if over se veral
seconds the dis tance maintained totheve hi‐
cle tr avelling in front is insuf ficient forthe
driven speed. The Ldistance warning
lamp then lights up in the instrument clus ter.
R From appr oximately 7 km/h, if your vehicle
is critically close toave hicle or pedestrian.
An intermittent warning tone sounds and the
L distance warning lamp lights up in the
instrument clus ter.
Brake immediately or take evasive action, pr ovi‐
ded it is safe todo so and the traf fic situation
allo wsthis.
The dis tance warning function can aid you in the
fo llowing situations:
R Vehicles tr avelling in front: uptoappr ox‐
imately 250 km/h
R Stationary vehicles: uptoappr oximately
70 km/h Au
tonomous braking function
The autonomous braking function may inter vene
at speeds ab oveappr oximately 7 km/h in the
fo llowing situations:
R Vehicles tr avelling in front:
- Vehicles without Active Dis tance Assi st
DISTRONIC: up toappr oximately
10 5 km/h
- Vehicles with Active Dis tance Assi st
DISTRONIC: up toappr oximately
200 km/h
R Stationary vehicles: uptoappr oximately
50 km/h
Situation-dependent braking assistance
Situation-dependent braking assis tance may
inter vene at speeds ab oveappr oximately
7 km/h in thefo llowing situations:
R Vehicles tr avelling in front: uptoappr ox‐
imately 250 km/h
R Stationary vehicles: uptoappr oximately
70 km/h Cancelling a brake application of
Active
Brake Assi st
Yo u can cancel a brake application of Active
Brake Assi stat any time by:
R Fully depressing the accelerator pedal or
with kickdown.
R Releasing the brake pedal.
Ac tive Brake Assi stmay cancel the brake appli‐
cation when one of thefo llowing conditions is
fulfilled:
R You manoeuv reto av oidthe obs tacle.
R The reis no longer a risk of collision.
R An obs tacle is no longer de tected in front of
yo ur vehicle.
Sy stem limits
The sy stem may be impaired or may not function
in thefo llowing situations:
R In sno w,rain, fog, heavy spr ay, if there is
gl are, in direct sunlight or in great lyvarying
light conditions.
R Ifth e sensors are dirty, mis ted up, damaged
or co vered. Driving and parking
137

R
Ifth e sensors are impaired due tointer fer‐
ence from other radar sources, e.g. strong
ra dar reflections in multi-s torey car par ks.
R If a loss of tyre pressure or a defective tyre
has been de tected and displaye d.
R Full sy stem per form ance is not available for a
fe w seconds af ter switching on the ignition
or af ter driving off.
R In complex traf fic situations whe reobjects
cannot always be clear lyidentified.
R Forve hicles if they mo vequickly into the
sensor de tection range.
R On bends wi tha tight radius.
% The Active Brake Assi stsensors adjust auto‐
matically while a cer tain dis tance is being
driven af terth eve hicle has been delivered.
Ac tive Brake Assi stis una vailable or only
partially available during this teach-in period. Setting
Active Brake Assi st Multimedia sy
stem:
4 Vehicle 5
k Assistance
5 Active Brake Assist #
Activate or deacti vate the function.
% It is recommended that you alw ays lea ve
Ac tive Brake Assi stactivated.
% IfAc tive Brake Assi stis deactivated, the
æ symbol appears inthest atus bar of the
multifunction displa y. Fu
nction of Adaptive Brake Lights Ad
aptive Brake Lights warnfollowing traf fic in an
emergency braking situation with th efo llowing
actions:
R Byflashing the brake lamps
R By activating the hazard warning lights
If th eve hicle is braked sharply from speeds
abo ve50 km/h, the brake lamps flash rapidl y.
This pr ovides traf fic tr avelling behind you with an
ev en 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 contro lre 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 accelera tor pedal af terov ertaking,
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
design speed or up tothe set winter tyre limit. 13 8
Driving and pa rking

&
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.
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 possible
deceleration. If this decele ration is not su ffi‐
cient, Active Dis tance Assi stDISTRONIC
alerts you with a visual and acoustic warning. #
Adjust your speed and main tain a suita‐
ble dis tance from theve hicle in front. #
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 elect ric pa rking brake is released.
R ESP ®
is activated and is not inter vening.
R The transmission is in position h.
R The driver's door is 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. Driving and parking
14 3

Note
s on care of car parts &
WARNING Risk of entrapment if the
windscreen wipers are swit ched on while
th e windscreen is being cleaned
If th e windscreen wipers are set in motion
while you are cleaning the windscreen or
wiper blades, you can be trapped bythe
wiper arm. #
Alw ays switch off the windscreen wip‐
ers and the ignition before cleaning the
windscreen or wiper blades. &
WARNING Risk of burn s fromtheta il‐
pipe and tailpipe trims
The exhaust tailpipe and tailpipe trims can
become very hot. If you come into contact
with these parts of theve hicle, you could
burn yourself. #
Alw ays be particular lycareful around
th eta ilpipe and theta ilpipe trims and
supervise children especially closely in
th is area. #
Allow vehicle parts tocool down before
to uching them. Obser
vethe no tes on cleaning and care of the
fo llowing vehicle parts toavoid damage.
Wheels/rims R Use water and acid-free wheel cleaners.
R Do not use acidic wheel cleaners toremo ve
brake dust. This could damage wheel bolts
and brake components.
R Toavo id cor rosion of the brake discs and
brake pads, drive theve hicle for a few
minutes af ter cleaning before parking it. The
brake discs and brake pads warm up and dry
out.
Wi ndo ws
R Clean wind owsinside and outside with a
damp clo thand with a cleaning agent recom‐
mended for Mercedes-Benz.
R Do not use dry clo ths or abrasive or sol vent-
based cleaning agents toclean the inside of
windo ws. Wi
per blades
R Fold out the wiper blades and clean them
using a damp clo th.
R Do not clean the wiper blades too of ten.
Ex terior lighting
R Clean the lenses with a wet sponge and mild
cleaning agent, e.g. car sha mpoo.
R Only use cleaning agents or cleaning clo ths
th at are suitable for plast ic lenses.
Sensors
R Clean the sensors in the front and rear
bumpers with a soft clo thand car shampoo
(/ page 132).
R When using a high-pressure cleaner,maintain
a minimum dis tance of 30 cm.
Re versing camera and front camera
R Use clean water and a soft clo thtoclean the
came ralens.
R Do not use a high-pressure cleaner.
Extendable rear wing
R Extend there ar wing when washing byhand
(/ page 148). Main
tenance and care 241

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 264)R
Tyre pressure table (/ page 265)
R Notes on the emer gency spa rewheel
(/ page 277) &
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. 270
Wheels and tyres

Display messages
Possible causes/consequences and M MSolutions
Blind Spot Assist inopera-
tive *B
lind Spot Assist is malfunctioning. #
Consult a qualified specialist workshop.
Blind Spot Assist currently
unavailable See Owner's
Manual *B
lind Spot Assist is temp orarily una vailable.
The sy stem limits ha vebeen reached (/ page156). #
Drive on.
Once the cause of the problem is no longer present, the sy stem will be available again.
or #
Ifth e display message does not disappear, stop theve hicle in accordance with the tra ffic conditions and restart
th e engine. #
If necessar y,clean there ar bumper. If the bumper is especially dirty, the sensors in the bumper may be mal‐
functioning.
RACE START not possible
See Owner's Manual *P
ossible causes:
R The activation conditions ha venot been ful filled (/ page146).
RACE START cancelled *P
ossible causes:
R youre leased the accelera tor pedal during RACE STAR T.
R you depressed the brake pedal during RACE STAR T.
Yo u can try RACE START again at the next start. 318
Displaymessa ges and warning/indicator lamps