2019 MERCEDES-BENZ AMG GT ROADSTER engine

Narrow vehicles
Active Distance Assist DISTRONIC has not yet
detected the vehicle in front on the edge of the
road because of its narrow width. The distance
to the vehicle in front will be too short.
Obstructions and stationary vehicles Active Distance Assist DISTRONIC does not
brake for obstacles or stationary vehicles. If, for
example, the detected vehicle turns a corner
and an obstacle or stationary vehicle is revealed, Active Distance Assist DISTRONIC will not brake
for them.
Crossing vehicles Active Distance Assist DISTRONIC may mistak-
enly detect vehicles that are crossing your lane. Activating Active Distance Assist DISTRONIC at,
for example, a traffic light with crossing traffic
could cause your vehicle to pull away at the
wrong time. HOLD
General notes The HOLD function can assist the driver in the
following situations:
R when pulling away, especially on steep slopes
R when maneuvering on steep slopes
R when waiting in traffic
The vehicle is kept stationary without the driver having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
Important safety notes G
WARNING
If the vehicle is only braked using the HOLD
function, the vehicle may roll away in the fol-
lowing situations when you leave the vehicle:
R if there is a malfunction in the system or in
the voltage supply
R if the HOLD function is deactivated by
depressing the accelerator pedal or brake
pedal, e.g. by a vehicle occupant
R if the electrical system in the engine com-
partment, the battery or the fuses are tam-
pered with or the battery is disconnected
There is a risk of an accident.
Always deactivate the HOLD function and
secure the vehicle against rolling away before
you leave it.
! When Active Distance Assist DISTRONIC or
the HOLD function is activated, the vehicle
brakes automatically in certain situations. 144
Driving systemsDriving an
d parking

To avoid damage to the vehicle, deactivate
Active Distance Assist DISTRONIC and the
HOLD function in the following or similar sit-
uations:
R when towing the vehicle
R in the car wash
Deactivate the HOLD function (Y page 145).
Activation conditions You can activate the HOLD function if all of the
following conditions are fulfilled:
R
the vehicle is stationary.
R the engine is running or if it has been auto-
matically switched off by the ECO start/stop
function.
R the driver's door is closed or your seat belt is
fastened.
R the electric parking brake is released.
R the transmission is in position 005B,005Eor005C.
Activating the HOLD function X
Make sure that the activation conditions are
met.
X Depress the brake pedal.
X Quickly depress the brake pedal further until
HOLD HOLD 0043appears in the multifunction display.
The HOLD function is activated. You can
release the brake pedal.
i If depressing the brake pedal the first time
does not activate the HOLD function, wait
briefly and then try again. Deactivating the HOLD function The HOLD function is deactivated if:
R you depress the accelerator and the trans-
mission is in position 005Bor005E
R you shift the transmission to position 005D
R you apply the brakes again with a certain
amount of pressure until the HOLD
HOLD display dis-
appears from the multifunction display
R you secure the vehicle using the electric park-
ing brake
i After a time, the electric parking brake
secures the vehicle and relieves the service
brake.
The electric parking brake secures the vehicle
automatically if the HOLD function is activated
when the vehicle is stationary and:
R the driver's seat belt is not fastened and the
driver's door is open
R the engine is switched off, unless it is auto-
matically switched off by the ECO start/stop
function
R a system malfunction occurs
R the power supply is not sufficient
If the electric parking brake is not operational, a
horn will sound at regular intervals. The HOLD
function must then be deactivated.
If a malfunction occurs, the transmission may
also be shifted to position 005Dautomatically.
The Brake Immediately Brake Immediately message may also
appear in the multifunction display.
X Immediately depress the brake firmly until the
warning message in the multifunction display
goes out.
The HOLD function is deactivated. If you turn off the engine, take off your seat belt or open the
driver's door when the HOLD function is activa- ted, a horn will sound at regular intervals. The
sounding of the horn alerts you to the fact that
the HOLD function is still activated. If you
attempt to lock the vehicle, the tone becomes
louder. The vehicle cannot be locked until you
have deactivated the HOLD function.
i After switching off the engine, it can only be
started again once you have deactivated the
HOLD function. Driving systems
145Driving and parking Z

RACE START
Important safety notes i
RACE START must not be used on normal
roads. RACE START must only be activated
and used on dedicated road circuits, outside
of public road use.
RACE START enables optimal acceleration from
a standing start. For this, a suitably high-grip
road surface is required and the vehicle and tires must be in good working order. G
WARNING
If you use RACE START, individual tires may
start to spin and the vehicle could skid.
Depending on the selected ESP ®
mode, there
is an increased risk of skidding and having an accident. Make sure that no persons, animals
or obstacles are within range of the vehicle.
i Observe the safety notes on driving safety
systems (Y page 58).
Be sure to read the safety notes and informa-
tion on ESP ®
(Y page 62).
i Observe the specific service requirements
for racetrack mode operation (Y page 241).
Activation conditions You can activate RACE START under the follow-
ing conditions:
R the doors are closed
R the engine is running and the engine and
transmission are at operating temperature.
This is the case when the oil temperature dis- play in the multifunction display is shown in
white (Y page 170).
R ESP ®
is functioning correctly (Y page 62)
R the steering wheel is in the straight-ahead
position
R the vehicle is stationary and the brake pedal is
depressed sufficiently (left foot)
R the transmission is in position 005B
R drive program S,S+ orRACE is selected
(Y page 116). Activating RACE START (AMG GT S) i
When manual mode (Y
page 123) is active,
the transmission automatically shifts up in
the RACE START drive program. This function supports maximum acceleration with RACE
START. After going through an accelerating
process once from a stationary position, this
function is automatically deactivated.
X Depress the brake pedal with your left foot
and keep it depressed.
X Pull and hold both steering wheel paddle shift-
ers.
The RACE START Confirm: Paddle UP RACE START Confirm: Paddle UP
Cancel: Paddle DOWN
Cancel: Paddle DOWN message appears in
the multifunction display.
X Release both steering wheel paddle shifters.
i If the activation conditions are no longer ful-
filled, RACE START is canceled. The RACE
RACE
START Not Possible See Operator's
START Not Possible See Operator's
Manual Manual message appears on the multifunc-
tion display.
X To cancel: pull the left-hand steering wheel
paddle shifter (Y page 121).
or
X To confirm: pull the right-hand steering
wheel paddle shifter (Y page 121).
The RACE
RACE START
START Available
Available Depress
Depressgas
gas
pedal.
pedal. message appears on the multifunc-
tion display.
i If you do not depress the accelerator pedal
within a few seconds, RACE START is can-
celed. The RACE START Canceled
RACE START Canceled message
appears on the multifunction display.
X Fully depress the accelerator pedal.
The engine speed is increased.
The RACE RACE START
START Release
Release brake
braketo
tostart
start
message appears in the multifunction display.
i If you do not release the brake pedal within
a short time, RACE START will be canceled.
The RACE START Canceled RACE START Canceled message
appears on the multifunction display.
X Take your foot off the brake, but keep the
accelerator pedal depressed.
The vehicle pulls away at maximum acceler-
ation.
The RACE
RACE START START Active
Active message appears in
the multifunction display.
RACE START is deactivated when the vehicle
reaches a speed of approximately 30 mph (Can-
ada: 50 km/h). 146
Driving systemsDriving and parking

RACE START is deactivated immediately if you
release the accelerator pedal during RACE
START or if any of the activation conditions are
no longer fulfilled. The RACE START Not Pos‐
RACE START Not Pos‐
sible See Operator's Manual
sible See Operator's Manual orRACE RACE
START Canceled
START Canceled message appears in the mul-
tifunction display.
i If RACE START is used repeatedly within a
short period of time, it is only available again
after the vehicle has been driven a certain
distance.
Activating RACE START (AMG GT C) i
When manual mode (Y
page 123) is active,
the transmission automatically shifts up in
the RACE START drive program. This function supports maximum acceleration with RACE
START. After going through an accelerating
process once from a stationary position, this
function is automatically deactivated.
X Depress the brake pedal with your left foot
and keep it depressed.
X Fully depress the accelerator pedal.
The engine speed is increased.
The RACE
RACE START START Release
Release brake
braketo
tostart
start
message appears in the multifunction display.
X To adjust RACE START: pull the left-hand or
right-hand steering wheel gearshift paddle.
RACE START adjustment:
R left-hand steering wheel gearshift paddle:
to reduce engine speed
R right-hand steering wheel gearshift paddle:
to increase engine speed
The engine speed is adjusted.
The segments in the multifunction display
flicker rapidly.
i If you do not release the brake pedal within
a short time, RACE START will be canceled.
The RACE START Canceled RACE START Canceled message
appears in the multifunction display.
X Take your foot off the brake, but keep the
accelerator pedal depressed.
The vehicle pulls away at maximum acceler-
ation.
The RACE START Active RACE START Active message appears
on the multifunction display.
RACE START is deactivated when the vehicle
reaches a speed of approximately 30 mph (Can- ada: 50 km/h). RACE START is deactivated immediately if you
release the accelerator pedal during RACE
START or if any of the activation conditions are
no longer fulfilled. The RACE START Not Pos‐
RACE START Not Pos‐
sible See Operator's Manual
sible See Operator's Manual orRACE
RACE
START Canceled
START Canceled message appears in the mul-
tifunction display.
i If RACE START is used repeatedly within a
short period of time, it is only available again
after the vehicle has been driven a certain
distance. AMG adaptive sport suspension sys-
tem
General notes The electronically controlled damping system
works continuously. This improves driving
safety and ride comfort.
The damping is tuned individually to each wheel
and depends on:
R your driving style, e.g. sporty
R the road surface condition, e.g. bumps
R your individual selection of Sport, Sport+ or
Comfort
Each time you start the engine with the Smart-
Key or the Start/Stop button, Comfort mode is
activated. For further information about starting
the engine, see (Y page 111).
Adjusting the suspension settings 0043
Adjusts AMG adaptive sport suspension sys-
tem
0044 Right indicator lamp
0087 Left indicator lamp
The suspension setting is adjusted using but-
ton 0043on the center console. Driving systems
147Driving and parking Z

0043
Sensors in the front bumper, left-hand side
(example)
The sensors must be free from dirt, ice or slush. They can otherwise not function correctly. Clean
the sensors regularly, taking care not to scratch
or damage them (Y page 246).
Range 0043
Approx. 24 in (approx. 60 cm) (corners)
0044 Approx. 32 in (approx. 80 cm) (corners)
0087 Approx. 48 in (approx. 120 cm) (center)
0085 Approx. 40 in (approx. 100 cm) (center)
Minimum distance Center Approx. 8 in (approx. 20 cm)
Corners Approx. 6 in (approx. 15 cm) If there is an obstacle within this range, the rel-
evant warning displays light up and a warning
tone sounds. If the distance falls below the min- imum, the distance may no longer be shown.
Warning displays 0043
Segments on the left-hand side of the vehi-
cle
0044 Segments on the right-hand side of the vehi-
cle
0087 Segments showing operational readiness
The warning displays show the distance
between the sensors and the obstacle. The
warning display for the front area is in the instru- ment cluster. The warning display for the rear
area is located on the cover behind the seats in the rear compartment.
The warning display for each side of the vehicle
is divided into five yellow and two red segments.
Parking Assist PARKTRONIC is operational if
operational readiness indicator 0087lights up.
The selected transmission position and the
direction in which the vehicle is rolling deter-
mine which warning display is active when the
engine is running. Transmission posi-
tion Warning display
005B
Front area activated
005E,
005Cor the vehicle
is rolling backwards Rear and front areas
activated
005D
No areas activated
One or more segments light up as the vehicle
approaches a detected obstacle, depending on
the vehicle's distance from the obstacle:
From the:
R sixth segment onwards, you will hear an inter-
mittent warning tone for approximately two
seconds.
R seventh segment onwards, you will hear a
warning tone for approximately two seconds. Driving systems
149Driving and parking Z

X
Back up carefully until you have reached the
final position.
Red guide line 0043is then at the end of parking
space 0087. The vehicle is almost parallel in the
parking space.
Wide-angle function 0043
Symbol for the wide-angle view function
0044 Your vehicle
0087 Warning displays for Parking Assist
PARKTRONIC
You can also use the rear view camera to select
a wide-angle view.
When Parking Assist PARKTRONIC is opera-
tional (Y page 149), a symbol for your own vehi-
cle appears in the multimedia system display. If
the Parking Assist PARKTRONIC warning dis-
plays are active, warning displays 0087light up in
the multimedia system display in yellow or red
accordingly. ATTENTION ASSIST
General notes ATTENTION ASSIST helps you during long,
monotonous journeys, such as on highways. It is
active in the 37 mph (60 km/h) to 125 mph
(200 km/h) range. If ATTENTION ASSIST
detects typical indicators of fatigue or increas-
ing lapses in concentration on the part of the
driver, it suggests taking a break.
Important safety notes ATTENTION ASSIST is only an aid to the driver. It
might not always recognize fatigue or increasing
inattentiveness in time or fail to recognize them at all. The system is not a substitute for a well-
rested and attentive driver. The functionality of ATTENTION ASSIST is
restricted and warnings may be delayed or not
occur at all:
R if the length of the journey is less than approx-
imately 30 minutes
R if the road condition is poor, e.g. if the surface
is uneven or if there are potholes
R if there is a strong side wind
R if you have adopted a sporty driving style with
high cornering speeds or high rates of accel-
eration
R if you are predominantly driving slower than
37 mph (60 km/h) or faster than 125 mph
(200 km/h)
R if the time has been set incorrectly
R in active driving situations, such as when you
change lanes or change your speed
The ATTENTION ASSIST tiredness assessment
is deleted and restarted when you continue the
journey:
R when you switch off the engine
R when you take off your seat belt and open the
driver's door, e.g. for a change of drivers or to
take a break
Displaying the attention level You can have current status information dis-
played in the assistance menu (Y
page 168) of
the on-board computer.
X Select the Assistance display for ATTENTION
ASSIST using the on-board computer
(Y page 167). 154
Driving systemsDriving and parking

The following information is displayed:
R the length of the journey since the last break.
R the attention level determined by ATTENTION
ASSIST ( Attention Level
Attention Level), displayed in a
bar display in five levels from high to low.
R if ATTENTION ASSIST is unable to calculate
the attention level and cannot issue a warn-
ing, the System Suspended System Suspended message
appears. The bar display then changes what is shown, e.g. if you are driving at a speed below 37 mph (60 km/h) or above 125 mph
(200 km/h).
Activating ATTENTION ASSIST X
Activate ATTENTION ASSIST using the on-
board computer (Y page 168).
The system determines the attention level of
the driver depending on the setting selected:
Selection of Standard
Standard: the sensitivity with
which the system determines the attention level
is set to normal.
Selection of Sensitive Sensitive: the sensitivity is set
higher. The attention level detected by ATTEN-
TION ASSIST is adapted accordingly and the
driver is warned earlier.
When ATTENTION ASSIST is deactivated, the
00D7 symbol appears in the multifunction dis-
play in the Assistance display.
When ATTENTION ASSIST has been deactivated, it is automatically reactivated after the engine
has been stopped. The sensitivity selected cor-
responds to the last selection activated ( Stand‐
Stand‐
ard ard orSensitive
Sensitive ).
Warning in the multifunction display If fatigue or increasing lapses in concentration
are detected, a warning appears in the multi-
function display: ATTENTION ASSIST
ATTENTION ASSIST Take a Take a
Break!
Break! .
In addition to the message shown in the multi-
function display, you will then hear a warning
tone.
X If necessary, take a break.
X Confirm the message by pressing the 0076
button on the steering wheel.
On long journeys, take regular breaks in good
time to allow yourself to rest. If you do not take a break and ATTENTION ASSIST still detects
increasing lapses in concentration, you will be
warned again after 15 minutes at the earliest. This will only happen if ATTENTION ASSIST still
detects typical indicators of fatigue or increas-
ing lapses in concentration.
If a warning is output in the multifunction dis-
play, a service station search is performed in
COMAND. You can select a service station and
navigation to this service station will then begin.
This function can be activated and deactivated
in COMAND. Lane Tracking package
General notes The Lane Tracking package consists of Blind
Spot Assist (Y page 155) and Lane Keeping
Assist (Y page 157).
Blind Spot Assist General notes
Blind Spot Assist monitors the areas on either
side of the vehicle that are not visible to the
driver with two lateral, rear-facing radar sen-
sors. A warning display in the exterior mirrors
draws your attention to vehicles detected in the
monitored area. If you then switch on the cor-
responding turn signal to change lanes, you will also receive a visual warning and hear a warning
tone.
Blind Spot Assist supports you from a speed of
approximately 20 mph (30 km/h).
Important safety notes G
WARNING
Blind Spot Assist does not react to:
R vehicles overtaken too closely on the side,
placing them in the blind spot area
R vehicles which approach with a large speed
differential and overtake your vehicle
As a result, Blind Spot Assist may not give
warnings in such situations. There is a risk of an accident.
Always observe the traffic conditions care-
fully, and maintain a safe lateral distance.
Blind Spot Assist is only an aid. It may fail to
detect some vehicles and is no substitute for
attentive driving. Always ensure that there is Driving systems
155Driving and parking Z

Important safety notes
G
WARNING
If you operate information systems and com-
munication equipment integrated in the vehi- cle when driving, you may be distracted from
the traffic situation. You could also lose con-
trol of the vehicle. There is a risk of an acci-
dent.
Only operate this equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary.
You must observe the legal requirements for the country in which you are currently driving whenoperating the on-board computer. G
WARNING
If the instrument cluster has failed or mal-
functioned, you may not recognize function
restrictions in systems relevant to safety. The operating safety of your vehicle may be
impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately.
The on-board computer only shows messages or
warnings from certain systems in the multifunc- tion display. You should therefore make sure
your vehicle is operating safely at all times.
If the operating safety of your vehicle is
impaired, pull over as soon as it is safe to do so. Contact a qualified specialist workshop.
For an overview, see the instrument panel illus-
tration (Y page 34). Displays and operation
Speedometer with segments
The segments in the speedometer indicate
which speed range is available:
R Cruise control activated (Y page 134):The segments light up from the stored speed
to the type-tested maximum speed.
R Active Distance Assist DISTRONIC activated
(Y page 136):
One or two segments in the set speed range
light up.
R Active Distance Assist DISTRONIC detects a
vehicle in front moving more slowly than the
stored speed:
The segments between the speed of the vehi-
cle in front and the stored speed light up. Tachometer
! Do not drive in the overrevving range, as this
could damage the engine.
The red band in the tachometer indicates the
engine's overrevving range.
The fuel supply is interrupted to protect the
engine when the red band is reached. Outside temperature display
You should pay special attention to road condi-
tions when temperatures are around freezing
point.
Bear in mind that the outside temperature dis-
play indicates the measured air temperature
and not the road surface temperature.
The outside temperature display is in the multi-
function display (Y page 161).
Changes in the outside temperature are dis-
played after a short delay. Coolant temperature gauge
G
WARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department. Displays and operation
159On-board computer and displays Z