brake pads MERCEDES-BENZ AMG GT R-ROADSTER 2020 Owners Manual

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. Driving and parking
107

Therefore, obser
vethefo llowing no tes:
R due tosalt build-up on the brake disks and
brakepads, the braking dis tance can increase
considerably orresult in braking only on one
side
R maintain a much greater safe dis tance tothe
ve hicle in front
To remo vesalt build-up:
R brake occasionally while paying attention to
th e tra ffic conditions
R carefully depress the brake pedal at the end
of the journey and when starting the next
journey
Note s on aquaplaning
Aq uaplaning can take place once a cer tain
amount of water has accumulated on thero ad
sur face.
Obser vethefo llowing no tes during heavy precip‐
itation or in conditions in which aquaplaning may
occur:
R reduce speed
R avoid tyre ruts R
avoid sudden steering mo vements
R brake carefully
% Also obser vethe no tes on regular lych ecking
wheels and tyres (/ page 321).
Note s on driving through water on the road
sur face
Wa ter which has entered into theve hicle can
damage the engine, electrics and transmission.
Wa ter can also enter the air intake of the engine
and cause engine damage.
Obser vethefo llowing if you must drive thro ugh
wate r:
R The water,when calm, may only reach the
lo we r edge of theve hicle body.
R Drive at walking pace at most, otherwise
wate r can enter theve hicle interior or engine
compartment.
R Vehicles tr avelling in front, or oncoming vehi‐
cles, can create waves which may exceed the
maximum permissible dep thofthewa ter.
The braking ef fect of the brakes is reduced af ter
fo rd ing. Brake carefully while paying attention toth
e traf fic conditions until braking po wer has
been fully restored. Fu
nction of rear axle steering The
rear axle steering is an electromechanical
auxiliary steering on there ar axle which adjusts
th esteering of there ar wheels according tothe
position of the front wheels, depending on the
speed. This results in greater manoeuvrability
and impr ovedstabilit y.
Re ar axle steering has thefo llowing characteris‐
tics:
R reduced steering ef fort and turning circle
re sulting in reduced parking ef fort
R impr oved driving stabilit y,e.g. when corner‐
ing
R more direct steering resulting in impr oved
handling of theve hicle
Obser vethe no tes on snow chains
(/ page 321) and on activating sn ow chain
mode. 11 0
Driving and pa rking

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 113).
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 113).
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 11 4
Driving and pa rking

Scratches, cor
rosive deposits, areas af fected by
cor rosion and damage caused byincor rect care
cannot al ways be comple tely repaired. In such
cases, visit a qualified specialist workshop.
Yo u can obtain more information on care and
cleaning products from the manufacturer.
In the case of foil-wrapped sur faces, optical dif‐
fe re nces may occur between the sur faces that
we renot pr otected bya decorative foil af ter
re moving a decorative foil.
% Have wo rkor repairs todecorative foils car‐
ri ed out at a qualified specialist workshop,
e.g. in a Mercedes-Benz Service Centre. 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. Maintenance and care
299

Display messages
Possible causes/consequences and M MSolutions
! Turn on the ignition to
release the parking brake *
The red! indicator lamp is lit.
Yo u ha veattem ptedto release the electric parking brake with the ignition switched off. #
Switch on the ignition.
J Check brake fluid level *T
here is insuf ficient brake fluid in the brake fluid reser voir. &
WARNING Risk of an accident due tolow brake fluid le vel
If th e brake fluid le vel is too lo w,the braking ef fect and the braking characteristics may be impaired. #
Stop theve hicle as soon as possible, paying attention toroad and traf fic conditions. Do not continue driv‐
ing. #
Consult a qualified specialist workshop. #
Do not top up the brake fluid. #
Check brake pads See
Owner's Manual *T
he brakepads ha vereached thewe ar limit. #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 369

Selecting a media pl
ayer ..................... 275
Boot lid see Tailgate
Brake Assist Sy stem
see BAS (Brake Assi stSystem)
Brake fluid
No tes .................................................. 344
Brake forc e distribution
EBD (Elect ronic Brake forc e Distribu‐
tion) ..................................................... 13 5
Brake sy stem
ABS ...................................................... 11 4
Brake callipers ..................................... 11 5
Brake cooling ....................................... 11 5
Brake discs .......................................... 11 4
Brake fluid ............................................ 11 4
Brake hose .......................................... .115
Brake line ............................................. 11 5
Brake pads .......................................... .114
No tes ................................................... 11 4
Brakes ABS (Anti-lock Braking Sy stem) ........... 13 2
Ac tive Brake Assi st.............................. 13 5
Ad aptive brake lights ...........................1 38AMG ceramic high-per
form ance
composite brake sy stem ......................1 11
BA S (Brake Assi stSystem) .................. 13 2
Driving tips .......................................... 107
EBD (Electronic Brake forc e Distribu‐
tion) ..................................................... 13 5
HOLD function .................................... .145
Limi ted braking ef fect (salt-treated
ro ads) .................................................. 107
New/replaced brakepads/brake
discs .................................................... 106
Ru nning-in no tes ..................................1 06
Braking assi stance
see BAS (Brake Assi stSystem)
Breakdown Overview of the help functions .............. 14
To w- starting ........................................ .318
To wing away ......................................... 315
Tr ansporting theve hicle ....................... 317
Wheel change ...................................... 330
Breakdown see Flat tyre Bu
rm ester ®
high-end Sur round sound
sy stem ...................................................... 287
Ad justing the balance .......................... 288
Ad justing the sound optimisation ........ 288
Ad justing treble, mid-range and bass
settings ............................................... 288
Au tomatic volume adjustment ............ .288
Calling up the sound menu .................. 287
Information .......................................... 287
Selecting the sound profile .................. 288
Burmes ter®
sur round sound sy stem .....2 86
Ad justing the balance .......................... 287
Ad justing treble, mid-range and bass
settings ............................................... 287
Au tomatic volume adjustment ............ .287
Calling up the sound menu .................. 287
Information .......................................... 286
Switching the sur round sound on/off
............................................................ .287
Buttons Steering wheel .....................................1 64 Index
407

Display messages
¯ - - - km/h .................................. .370
ç - - - km/h ................................... .371
È - - - km/h ................................... 370
# 12V battery See Owner's Man‐
ual ....................................................... 381
5 Add 1 litre engine oil when
next refuelling .................................... .386
é ATTENTION ASSIST inoperative ..373
é ATTENTION ASSIS T:Take a
break! .................................................. 373
: Automatic driving lights inoper‐
ative .................................................... 354
 Change key bat teries ................. 352
J Check brake fluid le vel.............. .369
# Checkbrake pads See Owner's
Manual ................................................ 369
h Check tyre(s) .............................. 384
ÿ Coolant Stop vehicle Switch
engine off ............................................ 361 !
currently una vailable See Own‐
er's Manual .......................................... 376
÷ currently una vailable See Own‐
er's Manual .......................................... 377
5 Engine oil le vel cannot be
measured ............................................ 387
5 Engine oil le velRe duce oil le vel
............................................................. 387
ä Fault Drive at max. 80 km/h ......373
6 Front left malfunction Consult
wo rkshop (e xample)............................ 348
! inoperative See Owner's Man‐
ual ....................................................... 377
÷ inoperative See Owner's Man‐
ual ....................................................... 378
T inoperative See Owner's Man‐
ual ....................................................... 379
G Inoperative .................................3 81
 Insert key .................................. .353 Â
Key not de tected (red displ ay
messa ge).............................................3 52
 Key not de tected (white display
messa ge).............................................3 52
: Left dipped beam (e xamp le) .......3 53
6 Left wind owbag malfunction
Consult workshop (e xample).............. .348
: Malfunction See Owner's Man‐
ual ....................................................... 353
ð Maximum speed exceeded ......... 372
ç Off..............................................3 71
ë Off..............................................3 72
! Parking brake See Owner's
Manual ................................................ 365
Ù Rear axle steering cur rently
una vailable .......................................... 357
Ù Rear axle steering Malfunction
Vi sit workshop .....................................3 57
h Rectify tyre pressure .................. 385
! Release parking brake ................ 368 Index
411

Wa
ter tank
see Air-water duct
We ar
Brake discs .......................................... 11 4
Brake pads .......................................... .114
Wheel bolts .......................................... 11 5
We ather information ............................... 229
What3words Destination entry with a 3 word
address ................................................ 210
Wheel change
Fitting a new wheel ............................ .334
Fitting/removing plast ic hub caps ...... 330
Lo we ring theve hicle ........................... 335
Preparation ......................................... 330
Ra ising theve hicle ...............................3 31
Re moving a wheel .............................. .333
Wheel change
see Emer gency spa rewheel
Wheel rotation ........................................ .329
Wheels Care .................................................... 299
Checking ............................................. 321 Checking
the tyre pressure (tyre
pressure monitoring sy stem) ............... 324
Fitting .................................................. 334
Flat tyre ............................................... 304
Inter changing ...................................... 329
MOExtended tyres .............................. .305
Noise ................................................... 321
No tes ................................................... 11 5
No tes on fitting ................................... 325
Re moving ............................................ 333
Re placing .................................... 325, 330
Re starting the tyre pressure monitor‐
ing sy stem ...........................................3 25
Selection ............................................. 325
Snow chains ........................................ 321
St oring ................................................ 329
TIREFIT kit ...........................................3 06
Ty re pressure (N otes) .......................... 322
Ty re pressure monitoring sy stem
(function) ............................................. 324
Ty re pressure table .............................. 323
Un usual handling characteristics ........ .321
Wi -Fi .......................................................... 191
Overview ..............................................1 91
Setting ................................................. 191Setting up a hotspot ............................
19 3
Setting up an Internet connection ....... 258
Wi ndow airbag ...........................................39
Wi ndo ws
see Side windo ws
Wi ndo ws(care) ........................................ 299
Wi ndscreen
see Windshield
Wi ndscreen washer fluid ........................ 345
No tes .................................................. 345
Wi ndscreen washer sy stem
To pping up ...........................................2 95
Wi ndscreen wipers
Changing the wiper blades .................... 96
Switching on/off ................................... 96
Wi ndshield .................................................96
Changing the wiper blades .................... 96
Wi nter operation
Snow chains ........................................ 321
Wi nter tyres
Setting the permanent speed limit .......1 41 Index
435