battery MERCEDES-BENZ AMG GT ROADSTER 2019 Owner's Manual

Maintenance and care
......................235
Engine compartment ........................... 235
ASSYST PLUS ...................................... 240
Care ..................................................... 241 Breakdown assistance
.....................249
Where will I find...? .............................. 249
Flat tire ................................................ 250
Battery (vehicle) .................................. 254
Jump-starting ....................................... 256
Towing and tow-starting ...................... 258
Fuses .................................................. .261 Wheels and tires
............................... 263
Important safety notes ........................ 263
Operation ............................................ 263
Winter operation .................................. 265
Tire pressure ....................................... 266
Loading the vehicle .............................. 271
All about wheels and tires ................... 274
Changing a wheel ................................ 281
Wheel and tire combinations .............. .285 Technical data
................................... 287
Information regarding technical data ... 287
Vehicle electronics .............................. 287
Identification plates ............................ .287
Service products and filling capaci-
ties ...................................................... 289
Vehicle data ......................................... 293 Contents
3

B
Back button ....................................... 210
BAS (Brake Assist System) ................. 59
Basic settings
see Settings
Battery (SmartKey)
Checking .......................................... 69
Important safety notes .................... 68
Replacing ......................................... 69
Battery (vehicle)
Charging ........................................ 255
Display message ............................ 188
Important safety notes .................. 254
Jump starting ................................. 256
Replacing ....................................... 256
Belt
see Seat belts
Belt warning ......................................... 44
Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 168
Display message ............................ 190
Notes/function .............................. 155
Blower
see Climate control
Bluetooth ®
Searching for a mobile phone ........ 216
see also Digital Operator's Man-
ual .................................................. 209
Brake Assist System
see BAS (Brake Assist System)
Brake assistance
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 180
Notes ............................................. 291
Brake force distribution
see EBD (electronic brake force
distribution)
Brakes
ABS .................................................. 58
AMG high-performance and
ceramic brakes .............................. 133
BAS .................................................. 59
Brake fluid (notes) ......................... 291
Braking assistance appropriate to
the situation ..................................... 61 Display message ............................ 175
EBD .................................................. 64
Hill start assist ............................... 112
Important safety notes .................. 132
Maintenance .................................. 133
Parking brake ................................ 129
Riding tips ...................................... 132
Warning lamp ................................. 200
Braking assistance appropriate to
the situation
Function/note s................................ 61
Breakdown assistance
Where will I find...? ........................ 249
see Flat tire
see Towing away
Buttons on the steering wheel ......... 160 C
Cabriolet Soft top ............................................ 80
California
Important notice for retail cus-
tomers and lessees .......................... 25
Calling up a malfunction
see Display messages
Calling up the climate control bar
Multimedia system ........................ 213
Calling up the climate control
menu
Multimedia system ........................ 213
Car
see Vehicle
Care
Car wash ........................................ 242
Carpets .......................................... 248
Display ........................................... 247
Exhaust pipe .................................. 247
Exterior lights ................................ 246
Gear or selector lever .................... 247
General notes ................................ 241
Interior ........................................... 247
Matte finish ................................... 244
Paint .............................................. 243
Plastic trim .................................... 247
Power washe r................................ 243
Rear view camera .......................... 246
Roof lining ...................................... 248 6
Index

Important safety guidelines .............42
Introduction .....................................41
Releasin g......................................... 44
Warning lamp ................................. 199
Warning lamp (function) ................... 44
Seat function
see Seat
Seats
Adjusting (electrically) ..................... 86
Adjusting (manually) ........................ 85
Adjusting (Performance Seat) .......... 87
Adjusting lumbar support ................ 86
Adjusting the head restraint ............ 86
Calling up a stored setting (mem-
ory function) .................................... 95
Cleaning the cover ......................... 248
Important safety notes .................... 84
Seat heating problem ...................... 89
Seat ventilation problem .................. 89
Storing settings (memory func-
tion) ................................................. 94
Switching AIRSCARF on/of f............ 89
Switching seat heating on/of f......... 87
Switching seat ventilation on/of f.... 88
Selecting a gear
see Automatic transmission
Selector lever
Cleaning ......................................... 247
Positions ........................................ 117
Sensors (cleaning instructions) ....... 246
Service menu (on-board com-
puter) .................................................. 168
Service message
see ASSYST PLUS
Service products
Brake fluid ..................................... 291
Coolant (engine) ............................ 292
Engine oil ....................................... 291
Fuel ................................................ 289
Important safety notes .................. 289
Refrigerant (air-conditioning sys-
tem) ............................................... 293
Washer fluid ................................... 292
Setting the date/time format
see also Digital Operator's Man-
ual .................................................. 209 Setting the language
see also Digital Operator's Man-
ual .................................................. 209
Setting the time
see also Digital Operator's Man-
ual .................................................. 209
Settings
Factory (on-board computer) ......... 170
On-board computer ....................... 168
SETUP (on-board computer,
Mercedes-AMG vehicles) .................. 171
Side impact air bag ............................. 47
Side marker lamp (display mes-
sage) ................................................... 186
Side windows
Cleaning ......................................... 245
Convenience closing feature ............ 78
Convenience opening feature .......... 78
Important safety information ........... 76
Opening/closing .............................. 77
Problem (malfunction) ..................... 79
Resetting ......................................... 78
Reversing feature ............................. 77
SIRIUS services
see also Digital Operator's Man-
ual .................................................. 209
SmartKey
Changing the battery ....................... 69
Changing the programming ............. 68
Checking the battery ....................... 69
Convenience closing feature ............ 78
Convenience opening feature .......... 78
Display message ............................ 197
Door central locking/unlocking ....... 66
Important safety notes .................... 66
KEYLESS-GO start function .............. 67
Loss ................................................. 70
Mechanical key ................................ 68
Opening/closing soft top ................. 81
Overview .......................................... 66
Positions (ignition lock) ................. 111
Problem (malfunction) ..................... 70
Starting the engine ........................ 112
SMS
see also Digital Operator's Man-
ual .................................................. 209
Snow chains ...................................... 265 Index
17

Two-way radio
Frequencies ................................... 287
Installation ..................................... 287
Transmission output (maximum) .... 287
Type identification plate
see Vehicle identification plate U
Unlocking Emergency unlocking ....................... 73
From inside the vehicle (central
unlocking button) ............................. 72
USB devices
Connecting to the Media Inter-
face .............................................. .217 V
Vanity mirror (in the sun visor) ........221
Vehicle
Correct use ...................................... 28
Data acquisition ............................... 29
Display message ............................ 194
Electronics ..................................... 287
Equipment ....................................... 25
Individual settings .......................... 168
Limited Warranty ............................ .29
Loading .......................................... 271
Locking (in an emergency) ............... 73
Locking (SmartKey) .......................... 66
Lowering ........................................ 285
Maintenance .................................... 26
Operating safety .............................. 26
Parking .......................................... 127
Parking for a long period ................ 130
Pulling away ................................... 112
Raising ........................................... 282
Reporting problems ......................... 28
Securing from rolling away ............ 282
Towing away .................................. 258
Transporting .................................. 260
Unlocking (in an emergency) ........... 73
Unlocking (SmartKey )...................... 66
Vehicle data ................................... 293
Vehicle battery
see Battery (vehicle)
Vehicle data
Trunk load (maximum) ................... 293 Vehicle dimensions
........................... 293
Vehicle emergency locking ................ 73
Vehicle identification number
see VIN
Vehicle identification plate .............. 287
Vehicle maintenance
see ASSYST PLUS
Vehicle tool kit .................................. 249
Ventilation
see Climate control
Video
Operating the DVD ......................... 166
see also Digital Operator's Man-
ual .................................................. 209
VIN
Seat ............................................... 288
Type plate ...................................... 287 W
Warning and indicator lamps ABS ................................................ 201
Active Brake Assist ........................ 206
Brakes ........................................... 200
Check Engine ................................. 204
Coolant .......................................... 204
Distance warning ........................... 206
ESP ®
.............................................. 201
ESP ®
OFF ....................................... 202
Fuel tank ........................................ 204
Overview .......................................... 34
Parking brake ................................ 203
PASSENGER AIR BAG ...................... 41
Reserve fue l................................... 204
Restraint system ............................ 203
Seat belt ........................................ 199
SPORT handling mod e................... 203
Steering ......................................... 208
Tire pressure monitor .................... 207
Warranty .............................................. 25
Washer fluid
Display message ............................ 197
Weather display (COMAND)
see also Digital Operator's Man-
ual.................................................. 209
Wheel and tire combinations
Tires ............................................... 285
Wheel bolt tightening torque ........... 285 Index
21

Only connect equipment to a diagnostics con-
nection in the vehicle, which is approved for
your vehicle by Mercedes-Benz. G
WARNING
Objects in the driver's footwell can restrict the pedal travel or obstruct a depressed pedal.
The operating and road safety of the vehicle is
jeopardized. There is a risk of an accident.
Make sure that all objects in the vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Install the floormats
securely and as specified in order to ensure
sufficient clearance for the pedals. Do not use loose floormats and do not place floormats on
top of one another.
! If the engine is switched off and equipment
on the diagnostics connection is used, the
starter battery may discharge.
Connecting equipment to the diagnostics con-
nection can lead to emissions monitoring infor-
mation being reset, for example. This may lead
to the vehicle failing to meet the requirements of the next emissions test during the main inspec-
tion. Qualified specialist workshop
An authorized Mercedes-Benz Center is a quali-
fied specialist workshop. It has the necessary
specialist knowledge, tools and qualifications to correctly carry out the work required on your
vehicle. This is especially the case for work rel-
evant to safety.
Always have the following work carried out at an authorized Mercedes-Benz Center:
R work relevant to safety
R service and maintenance work
R repair work
R alterations, installation work and modifica-
tions
R work on electronic components Correct use
If you remove any warning stickers, you or oth-
ers could fail to recognize certain dangers.
Leave warning stickers in position.
Observe the following information when driving your vehicle:
R the safety notes in this manual
R the vehicle technical data
R traffic rules and regulations
R laws and safety standards pertaining to motor
vehicles Problems with your vehicle
If you should experience a problem with your
vehicle, particularly one that you believe may
affect its safe operation, we urge you to contact
an authorized Mercedes-Benz Center immedi-
ately to have the problem diagnosed and recti-
fied. If the problem is not resolved to your sat-
isfaction, please discuss the problem again with
the authorized Mercedes-Benz Center or, if nec-
essary, contact us at one of the following
addresses.
In the USA
Customer Assistance Center
Mercedes-Benz USA, LLC
One Mercedes Drive
Montvale, NJ 07645-0350
In Canada
Customer Relations Department
Mercedes-Benz Canada, Inc.
98 Vanderhoof Avenue
Toronto, Ontario M4G 4C9 Reporting safety defects
USA only:
The following text is published as required of
manufacturers under Title 49, Code of U.S. Fed- eral Regulations, Part 575 pursuant to the
"National Traffic and Motor Vehicle Safety Act of
1966".
If you believe that your vehicle has a defect
which could cause a crash or could cause injury
or death, you should immediately inform the
National Highway Traffic Safety Administration
(NHTSA) in addition to notifying Mercedes-Benz USA, LLC. 28
Operating safetyIntroduction

If NHTSA receives similar complaints, it may
open an investigation, and if it finds that a safety
defect exists in a group of vehicles, it may order a recall and remedy campaign. However, NHTSA cannot become involved in individual problems
between you, your dealer, or Mercedes-Benz
USA, LLC.
To contact NHTSA, you may call the Vehicle
Safety Hotline toll-free at 1-888-327-4236
(TTY: 1-800-424-9153); go to http://
www.safercar.gov; or write to: Administrator,
NHTSA, 400 Seventh Street, SW., Washington,
DC 20590.
You can also obtain other information about
motor vehicle safety at:
http://www.safercar.gov Limited Warranty
! Observe the notes in this Operator's Manual
regarding the correct operation of your vehi-
cle and possible damage to the vehicle. Dam-
age to the vehicle which is caused by violation
of these notes is not covered by the
Mercedes-Benz implied warranty or the new
or used-vehicle warranty. QR code for rescue card
The QR codes are secured in the fuel filler flap
and on the opposite side on the B-pillar. In the
event of an accident, rescue services can use
the QR code to quickly find the appropriate res-
cue card for your vehicle. The current rescue
card contains the most important information
about your vehicle in a compact form, e.g. the
routing of the electric cables.
You can find more information at
www.mercedes-benz.de/qr-code. Data stored in the vehicle
Electronic control units
There are electronic control units installed in
your vehicle. Some of these are necessary for
your vehicle to operate safely, while some offer
support during driving (driver assistance sys-
tems). In addition, your vehicle offers comfort
and entertainment functions that are also made possible by electronic control units. Electronic control units contain data storage
systems that can temporarily or permanently
save technical information concerning the vehi-
cle's condition, component stress and mainte-
nance requirements as well as technical events
and malfunctions.
This information generally documents the con-
dition of a component, a module, a system or the
surroundings, such as:
R Operating states of system components (e.g.
fill levels, battery status, tire pressure)
R Status messages concerning the vehicle or its
individual components (e.g. wheel rpm/
speed, deceleration, lateral acceleration, indi-
cation of whether seat belts are fastened)
R Malfunctions and defects in important system
components (e.g. lights, brakes)
R Information about events leading to vehicle
damage
R System responses in special driving situa-
tions (e.g. air bag deployment, intervention of
stability control systems)
R Ambient conditions (e.g. temperature, rain
sensor)
In addition to performing the actual control unit function, this data is used by manufacturers to
detect and rectify malfunctions and to optimize
vehicle functions. Most of this data is volatile
and processed only in the vehicle itself. Only a
small part of the data is stored in event or mal-
function memories.
When you use services, the technical data from
the vehicle can be read out by service network
employees (e.g. workshops, manufacturers) or
third parties (e.g. breakdown services). Services can include repair services, maintenance pro-
cesses, warranty cases and quality assurance
measures. The data are read out via the con-
nection for the diagnostics connection in the
vehicle, which is required by law. The relevant
offices in the service network or third parties
collect, process and use the data. This data
documents the vehicle's technical states, is
used to help in finding malfunctions and improv-
ing quality and is sent to the manufacturer
where necessary. In addition, the manufacturer is subject to product liability. The manufacturer
needs technical data from vehicles for this pur-
pose.
Malfunction memories in the vehicle can be
reset by a service center during repair or service work. Data stored in the vehicle
29Introduction Z

The spinning of the wheels results in a cut for
better traction on loose surfaces.
R traction control is still activated
R Adaptive Brake Assist is unavailable
Active Brake Assist is also not activated if you
brake firmly with assistance from ESP ®
.
R PRE-SAFE ®
is unavailable
PRE-SAFE ®
is also not activated if you brake
firmly with assistance from ESP ®
.
R ESP ®
still provides support when you brake
firmly EBD (electronic brake force distribu-
tion)
General information EBD monitors and controls the brake pressure
on the rear wheels to improve driving stability
while braking.
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 58). G
WARNING
If EBD is malfunctioning, the rear wheels can
lock, e.g. under full braking. This increases the risk of skidding and an accident.
You should therefore adapt your driving style
to the different handling characteristics. Have the brake system checked at a qualified spe-
cialist workshop.
Observe information regarding indicator and
warning lamps (Y page 201) as well as display
messages (Y page 177). ADAPTIVE BRAKE
ADAPTIVE BRAKE enhances braking safety and
offers increased braking comfort. In addition to
the braking function, ADAPTIVE BRAKE also fea-
tures the hill start assist function (Y page 112). Protection against theft
Immobilizer
The immobilizer prevents your vehicle from
being started without the correct SmartKey. X To activate with KEYLESS-GO start-func-
tion or KEYLESS-GO:
switch the ignition off
and open the driver's door.
X To activate with the SmartKey: remove the
SmartKey from the ignition lock.
X To deactivate: switch on the ignition.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Anyone
can start the engine if a valid SmartKey has been
left inside the vehicle.
i The immobilizer is always deactivated when
you start the engine.
In the event that the engine cannot be started (yet the vehicle's battery is charged), the sys-
tem is not operational. Contact an authorized Mercedes-Benz Center or call
1-800-FOR-MERCedes (in the USA) or
1-800-387-0100 (in Canada). ATA (anti-theft alarm system)
X
To arm: lock the vehicle with the SmartKey or
KEYLESS-GO.
Indicator lamp 0043flashes. The alarm system
is armed after approximately 15 seconds.
X To disarm: unlock the vehicle with the Smart-
Key or KEYLESS-GO.
or X With KEYLESS-GO start function or vehi-
cles with KEYLESS-GO:
press the Start/
Stop button.
The SmartKey must be in the vehicle. 64
Protection against theftSafety

after the vehicle is unlocked with the SmartKey.
Information on activating and deactivating the
locator lighting can be found in the Digital Oper-
ator's Manual.
X To open the trunk lid: press and hold the
0054 button until the trunk lid opens. KEYLESS-GO
General notes Bear in mind that the engine can be started by
any of the vehicle occupants if there is a Smart-
Key in the vehicle (Y page 112).
Locking/unlocking centrally You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you only need carry the
SmartKey with you. You can combine the func-
tions of KEYLESS-GO with those of a conven-
tional SmartKey. Unlock the vehicle by using
KEYLESS-GO, for instance, and lock it using the 0037 button on the SmartKey.
The driver's door and the door at which the han- dle is used, must both be closed. The SmartKey
must be outside the vehicle. When locking or
unlocking with KEYLESS-GO, the distance
between the SmartKey and the corresponding
door handle must not be greater than 3 ft (1 m).
A check which periodically establishes a radio
connection between the vehicle and the Smart-
Key determines whether a valid SmartKey is in
the vehicle. This occurs, for example:
R when starting the engine
R while driving
R when using the remote trunk lid opening sen-
sor
R when the external door handles are touched
R during convenience closing X
To unlock the vehicle: touch the inner sur-
face of the door handle.
X To lock the vehicle: touch sensor surface 0043
or 0044.
Make sure that you do not touch the inner
surface of the door handle.
X Convenience closing feature: touch
recessed sensor surface 0044for an extended
period.
Further information on the convenience clos-
ing feature (Y page 78).
Deactivating and activating If you do not intend to use the vehicle for a lon-
ger period of time, you can deactivate KEYLESS-
GO. The SmartKey will then use very little power, thereby conserving battery power. For the pur-
poses of activation/deactivation, the vehicle
must not be nearby.
X To deactivate: press the0037button on the
SmartKey twice in rapid succession.
The indicator light on the SmartKey flashes
twice briefly then one long flash, then KEY-
LESS-GO is deactivated (Y page 69).
X To activate: press any button on the Smart-
Key.
or X Insert the SmartKey into the ignition lock.
KEYLESS-GO and all of its associated features
are available again. KEYLESS-GO start function
Bear in mind that the engine can be started by
any of the vehicle occupants if there is a Smart- Key in the vehicle (Y page 112). SmartKey
67Opening and closing Z

Changing the settings of the locking
system
You can change the settings of the locking sys-
tem. This means that only the driver's door, the
glove box and the fuel filler flap are unlocked
when the vehicle is unlocked. This is useful if you
frequently travel on your own.
X To change the setting: press and hold down
the 0036 and0037 buttons simultaneously
for approximately six seconds until the indi-
cator lamp flashes twice (Y page 69).
If the setting of the locking system is changed
within the signal range of the vehicle, pressing
the 0037 or0036 button:
R locks or
R unlocks the vehicle
The SmartKey now functions as follows:
X To unlock: press the0036button once.
X To unlock centrally: press the0036button
twice.
X To lock: press the 0037button.
The KEYLESS-GO functions can be changed as
follows:
X To unlock the driver's door: touch the inner
surface of the door handle on the driver's
door.
X To unlock centrally: touch the inner surface
of the front-passenger door handle.
X To lock centrally: touch the outer sensor
surface on one of the door handles.
Restoring factory settings:
X Press the 0036and0037 buttons simultane-
ously for approximately six seconds until the
indicator lamp flashes twice (Y page 69).Mechanical key
General notes If the vehicle can no longer be locked or
unlocked with the SmartKey or KEYLESS-GO,
use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm sys- tem will be triggered. Switch off the alarm
(Y page 64). If you unlock the vehicle using the mechanical
key, the fuel filler flap will not be unlocked auto-
matically.
X To unlock the fuel filler flap: insert the
SmartKey into the ignition lock.
Removing the mechanical key X
Push release catch 0043in the direction of the
arrow and at the same time remove mechan- ical key 0044from the SmartKey.
For further information about:
R unlocking the driver's door (Y page 73)
R locking the vehicle (Y page 73)
Inserting the mechanical key X
Push mechanical key 0044completely into the
SmartKey until it engages and release
catch 0043is back in its basic position. SmartKey battery
Important safety notes G
WARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention immediately. 68
SmartKeyOpening and closing

H
Environmental note Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be collected separately
and recycled to protect the
environment. Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
collection point for used bat-
teries.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm.
Mercedes-Benz recommends that you have the
batteries replaced at a qualified specialist work- shop.
Checking the battery X
Press the 0037or0036 button.
The battery is working properly if battery
check lamp 0043lights up briefly.
The battery is discharged if battery check
lamp 0043does not light up briefly.
X Change the battery (Y page 69). If the SmartKey battery is checked within the
signal reception range of the vehicle, pressing
the 0037 or0036 button:
R locks or
R unlocks the vehicle
i You can get a battery at any qualified spe-
cialist workshop.
Replacing the battery You require a CR 2025 3 V cell battery.
X Take the mechanical key out of the SmartKey
(Y page 68). X
Press mechanical key 0044into the SmartKey
opening in the direction of the arrow until bat- tery compartment cover 0043opens. Do not
hold battery compartment cover 0043closed
while doing so.
X Remove battery compartment cover 0043. X
Repeatedly tap the SmartKey against your
palm until battery 0087falls out.
X Insert the new battery with the positive ter-
minal facing upwards. Use a lint-free cloth to
do so.
X Make sure that the surface of the battery is
free of lint, grease and other contaminants. SmartKey
69Opening and closing Z