park assist MERCEDES-BENZ AMG GT ROADSTER 2019 Owner's Guide

Active Distance Assist DISTRONIC operates in
the speed range between 0 mph (0 km/h) and
120 mph (200 km/h).
Do not use Active Distance Assist DISTRONIC
while driving on roads with steep gradients.
As Active Distance Assist DISTRONIC transmits
radar waves, it can be mistaken for the radar
detectors used by the traffic authorities. You
can refer to the relevant chapter in the Opera-
tor's Manual if questions are asked about this.
i USA only: This device has been approved by
the FCC as a "Vehicular Radar System". The
radar sensor is intended for use in an auto-
motive radar system only. Removal, tamper-
ing, or altering of the device will void any war-
ranties, and is not permitted by the FCC. Do
not tamper with, alter, or use in any non-
approved way.
Any unauthorized modification to this device
could void the user's authority to operate the equipment.
i Canada only: This device complies with
RSS-210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause interference,
and
2. This device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the device will void any warranties, and is not permitted.
Do not tamper with, alter, or use in any non-
approved way.
Any unauthorized modification to this device
could void the user's authority to operate the
equipment.
Important safety notes G
WARNING
Active Distance Assist DISTRONIC does not
react to:
R people or animals
R stationary objects in the road, e.g. stopped
or parked vehicles
R oncoming vehicles and crossing traffic
As a result, Active Distance Assist DISTRONIC
may neither give warnings nor intervene in
such situations. There is a risk of an accident. Always pay careful attention to the traffic sit-
uation and be ready to brake. G
WARNING
Active Distance Assist DISTRONIC cannot
always clearly identify other road users and
complex traffic situations.
In such cases, Active Distance Assist
DISTRONIC can:
R give an unnecessary warning and then
brake the vehicle
R neither give a warning nor intervene
R accelerate or brake unexpectedly
There is a risk of an accident.
Continue to drive carefully and be ready to
brake, especially if Active Distance Assist
DISTRONIC warns you. G
WARNING
DISTRONIC PLUS brakes your vehicle with up to 50% of the maximum possible deceleration.
If this braking force is insufficient, DISTRONIC
PLUS warns you visually and audibly. There is a risk of an accident.
In such cases, apply the brakes yourself and
try to take evasive action.
! When Active Distance Assist DISTRONIC or
the HOLD function is activated, the vehicle
brakes automatically in certain situations.
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
Active Distance Assist DISTRONIC can neither
reduce the risk of an accident if you fail to adapt
your driving style, nor override the laws of phys- ics. Active Distance Assist DISTRONIC cannot
take into account road, weather or traffic con-
ditions. Active Distance Assist DISTRONIC is
only an aid. You are responsible for the distance
to the vehicle in front, for vehicle speed, for
braking in good time and for staying in your lane. Driving systems
137Driving and parking Z

Do not use Active Distance Assist DISTRONIC:
R In road and traffic conditions which do not
allow you to maintain a constant speed, e.g. in
heavy traffic or on winding roads
R on slippery road surfaces. Braking or accel-
erating could cause the drive wheels to lose
traction and the vehicle could then skid
R when there is poor visibility, e.g. due to fog,
heavy rain or snow
Active Distance Assist DISTRONIC may not
detect narrow vehicles driving in front, e.g.
motorcycles, or vehicles driving in a staggered
formation.
In particular, the detection of obstacles can be
impaired if:
R There is dirt on the sensors or anything else
covering the sensors
R There is snow or heavy rain
R There is interference by other radar sources
R There are strong radar reflections, for exam-
ple, in parking garages
If Active Distance Assist DISTRONIC no longer
detects a vehicle in front, Distance Pilot
DISTRONIC may unexpectedly accelerate to the
speed stored.
This speed may:
R be too high if you are driving in a turning lane
or an exit lane
R be so high in the right lane that you pass vehi-
cles driving on the left (in countries where
they drive on the right)
R be so high in the left lane that you pass vehi-
cles driving on the right (right-hand drive
countries)
If there is a change of drivers, advise the new
driver of the speed stored. Cruise control lever 0043
Activates or increases speed
0044 Activates or reduces speed
0087 Deactivates Active Distance Assist
DISTRONIC
0085 Activates at the current speed or last stored
speed
0083 Sets a specified minimum distance
Activating Active Distance Assist
DISTRONIC Activation conditions
To activate Active Distance Assist DISTRONIC,
the following conditions must be fulfilled:
R the engine must be started. It may take up to
two minutes of driving before Active Distance Assist DISTRONIC is ready for use.
R the electric parking brake must be released.
R ESP ®
must be active, but not intervening.
R the transmission must be in position 005B.
R the driver's door must be closed when you
shift from 005Dto005B or your seat belt must be
fastened.
R the front-passenger door and rear doors must
be closed. 138
Driving systemsDriving an
d parking

Activating
X
Briefly pull the cruise control lever towards
you 0044, up 0043or down 0087.
Active Distance Assist DISTRONIC is activa-
ted.
X To adjust the set speed in 1 mph incre-
ments (1 km/h increments):
briefly press
the cruise control lever up 0043to the pressure
point for a higher speed, or down 0087for a
lower speed.
Every time the cruise control lever is pressed
up or down, the last speed stored is increased or reduced.
or
X To adjust the set speed in 5 mph incre-
ments
(10 km/h increments): briefly press
the cruise control lever up 0043beyond the
pressure point for a higher speed, or down 0087
for a lower speed.
Every time the cruise control lever is pressed
up or down, the last speed stored is increased or reduced.
X Remove your foot from the accelerator pedal.
Your vehicle adapts its speed to that of the
vehicle in front, but only up to the desired
stored speed.
i If you do not fully release the accelerator
pedal, the Active Distance Assist Sus‐ Active Distance Assist Sus‐
pended
pended message appears in the multifunction
display. The set distance to a slower-moving
vehicle in front will then not be maintained.
You will be driving at the speed you determine
by the position of the accelerator pedal.
You can also activate Active Distance Assist
DISTRONIC when stationary. The lowest speed
that can be set is 20 mph (30 km/h). X
Briefly pull the cruise control lever towards
you 0044or press it up 0043or down 0087.
Active Distance Assist DISTRONIC is activa-
ted.
Activating at the current speed or last
stored speed G
WARNING
If you call up the stored speed and it differs
from the current speed, the vehicle acceler-
ates or decelerates. If you do not know the
stored speed, the vehicle could accelerate or brake unexpectedly. There is a risk of an acci-
dent.
Pay attention to the road and traffic condi-
tions before calling up the stored speed. If you do not know the stored speed, store the
desired speed again. X
Briefly pull the cruise control lever towards
you 0043.
X Remove your foot from the accelerator pedal.
The first time Active Distance Assist
DISTRONIC is activated, it stores the current
speed or regulates the speed of the vehicle to
the previously stored speed. Driving systems
139Driving and parking Z

Driving with Active Distance Assist
DISTRONIC Pulling away and driving
X
If you want to pull away with Active Dis-
tance Assist DISTRONIC: remove your foot
from the brake pedal.
X Briefly pull cruise control lever 0043towards
you.
or
X Accelerate briefly.
Your vehicle pulls away and adapts its speed
to that of the vehicle in front. If no vehicle is
detected in front, your vehicle accelerates to
the set speed.
i The vehicle can also pull away when it is
facing an unidentified obstacle or is driving on
a different line from another vehicle. The vehi-
cle then brakes automatically. There is a risk
of an accident. Be ready to brake at all times.
If there is no vehicle in front, Active Distance
Assist DISTRONIC operates in the same way as
cruise control.
If Active Distance Assist DISTRONIC detects a
slower-moving vehicle in front, it brakes your
vehicle. In this way, the distance you have selec- ted is maintained.
If Active Distance Assist DISTRONIC detects a
faster-moving vehicle in front, it increases the
driving speed. However, the vehicle is only
accelerated up to the speed you have stored.
Selecting the drive program Active Distance Assist DISTRONIC supports a
sporty driving style when you have selected the
S or S+ drive program. Acceleration behind the
vehicle in front or to the set speed is then notice- ably more dynamic. When you select the Cdrive
program, the vehicle accelerates more gently. This setting is recommended in stop-and-start
traffic.
Additional information on selecting the drive
program (Y
page 116).
Changing lanes If you change to the overtaking lane, Active Dis-
tance Assist DISTRONIC helps you if:
R you are driving at a speed greater than
45 mph (70 km/h)
R you switch on the appropriate turn signal
R Active Distance Assist DISTRONIC does not
currently detect a danger of collision
If these conditions are fulfilled, your vehicle is
accelerated. Acceleration will be interrupted if
changing lanes takes too long or if the distance
between your vehicle and the vehicle in front
becomes too small.
i When you change lanes, Active Distance
Assist DISTRONIC monitors the left lane.
Stopping G
WARNING
If you leave the driver's seat when the vehicle is only being braked by Active Distance Assist
DISTRONIC, it could roll away:
R if there is a malfunction in the system or in
the voltage supply
R if Active Distance Assist DISTRONIC is
deactivated using the cruise control lever,
for example by a vehicle occupant or from
outside the vehicle
R if the electrical system in the engine com-
partment, the battery or the fuses are tam-
pered with
R if the battery is disconnected
R if the vehicle is accelerated, e.g. by a vehi-
cle occupant
There is a risk of an accident.
Always deactivate Active Distance Assist
DISTRONIC and secure the vehicle against
rolling away before you leave it.
Further information about deactivating Active
Distance Assist DISTRONIC (Y page 142).
If Active Distance Assist DISTRONIC detects
that the vehicle in front is stopping, it brakes
your vehicle until it is stationary. 140
Driving syste
msDriving and parking

Once your vehicle is stationary, it remains sta-
tionary and you do not need to depress the
brake.
i After a time, the electric parking brake
secures the vehicle and relieves the service
brake.
i Depending on the specified minimum dis-
tance, your vehicle will come to a standstill at
a sufficient distance behind the vehicle in
front. The specified minimum distance is set
using the control on the cruise control lever.
The electric parking brake is applied automati-
cally if Active Distance Assist DISTRONIC is
active 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 insufficient
If a malfunction occurs, the transmission may
also shift to position 005Dautomatically.
Setting a speed X
Press the cruise control lever up 0043for a
higher speed or down 0044for a lower speed.
X To adjust the set speed in 1 mph incre-
ments (1 km/h increments):
briefly press
the cruise control lever up 0043or down 0044to
the pressure point.
Every time the cruise control lever is pressed
up 0043 or down 0044the last speed stored is
increased or reduced.
X To adjust the set speed in 5 mph incre-
ments (10 km/h increments): briefly pressthe cruise control lever up
0043or down 0044
beyond the pressure point.
Every time the cruise control lever is pressed
up 0043 or down 0044, the last speed stored is
increased or reduced.
i If you accelerate to overtake, Active Dis-
tance Assist DISTRONIC adjusts the vehicle's
speed to the last speed stored after you have
finished overtaking.
Setting a specified minimum distance You can set the specified minimum distance for
Active Distance Assist DISTRONIC by varying
the time span between one and two seconds.
This determines the distance that Active Dis-
tance Assist DISTRONIC is to maintain from the
vehicle in front, depending on the road speed.
You can see this distance in the multifunction
display (Y page 142).
i Make sure that you maintain the minimum
distance to the vehicle in front as required by law. Adjust the distance to the vehicle in front
if necessary. X
To increase: turn control0044in direction 0087.
Active Distance Assist DISTRONIC then main- tains a greater distance between your vehicleand the vehicle in front.
X To decrease: turn control0044in direction 0043.
Active Distance Assist DISTRONIC then main- tains a shorter distance between your vehicle
and the vehicle in front. Driving systems
141Driving and parking Z

Deactivating Active Distance Assist
DISTRONIC There are several ways to deactivate Active Dis-
tance Assist DISTRONIC:
X Briefly press the cruise control lever for-
wards 0043.
or X Brake, unless the vehicle is stationary.
When you deactivate Active Distance Assist
DISTRONIC, the Active Distance Assist Active Distance Assist
Off
Off message appears on the multifunction dis-
play for approximately five seconds.
i The last speed stored remains stored until
you switch off the engine.
i Active Distance Assist DISTRONIC is not
deactivated if you depress the accelerator
pedal.
Active Distance Assist DISTRONIC is automati-
cally deactivated if: R you engage the electric parking brake or if the
vehicle is automatically secured with the elec-
tric parking brake
R ESP ®
intervenes or you deactivate ESP ®
R the transmission is in position 005D,005Eor005C
R you pull the cruise control lever towards you
in order to pull away and the front-passenger door or one of the rear doors is open
R the vehicle is skidding
If Active Distance Assist DISTRONIC is deacti-
vated, you will hear a warning tone. You will see
the Active Distance Assist Off
Active Distance Assist Off message
on the multifunction display for approximately
five seconds. Displays in the instrument cluster Displays in the speedometer
If Active Distance Assist DISTRONIC detects a
vehicle in front, the segments between speed of
vehicle in front 0043to stored speed 0044light up.
i For design reasons, the speed displayed on
the speedometer may differ slightly from the
speed set for Active Distance Assist
DISTRONIC.
Display when Active Distance Assist
DISTRONIC is deactivated
On the on-board computer, you can select the
assistance graphics display. 0043
Vehicle in front, if detected
0044 Distance indicator, current distance to the
vehicle in front
0087 Specified minimum distance to the vehicle
in front; adjustable
0085 Your vehicle
X Select the Assistance Graphic Assistance Graphic function
using the on-board computer (Y page 167).142
Driving syste
msDriving and parking

Display when Active Distance Assist
DISTRONIC is activated 0043
Active Distance Assist DISTRONIC active
(text appears only when the cruise control
lever is actuated)
0044 Vehicle in front, if detected
0087 Specified minimum distance to the vehicle
in front; adjustable
0085 Your vehicle
X Select the Assistance Graphic Assistance Graphic function
using the on-board computer (Y page 167).
You will see the stored speed for approximately five seconds when you activate Active Distance
Assist DISTRONIC.
Tips for driving with Active Distance
Assist DISTRONIC General notes
Pay particular attention in the following traffic
situations:
R Cornering, going into and coming out of a
bend
R Vehicles traveling on a different line
R Other vehicles changing lanes
R Narrow vehicles
R Obstructions and stationary vehicles
R Crossing vehicles
In such situations, brake if necessary. Active
Distance Assist DISTRONIC will then be deacti-
vated. Cornering, going into and coming out of a
bend The ability of Active Distance Assist DISTRONIC
to detect vehicles when cornering is limited.
Your vehicle may brake unexpectedly or late.
Vehicles traveling on a different line Active Distance Assist DISTRONIC may not
detect vehicles that are not driving in the middle of their lane. The distance to the vehicle in frontwill be too short.
Other vehicles changing lanes Active Distance Assist DISTRONIC has not
detected the vehicle cutting in yet. The distance
to this vehicle will be too short. Driving syste
ms
143Driving an d parking Z

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

i
The suspension setting can also be adjusted
using the DYNAMIC SELECT controller
(Y page 116).
Setting "Sport" mode
X Press button 0043repeatedly until left indicator
lamp 0087lights up.
You have selected Sport mode.
The AMG Suspension System SPORT
AMG Suspension System SPORT mes-
sage appears on the multifunction display.
The firmer setting of the suspension tuning in
Sport mode ensures even better contact with
the road. Select this mode when employing a
sporty driving style, e.g. on winding country
roads.
Setting "Sport +" mode
X Press button 0043repeatedly until indicator
lamps 0044and 0087light up.
You have selected Sport + mode.
The AMG
AMG Suspension Suspension System
SystemSPORT +
SPORT + mes-
sage appears on the multifunction display.
The very firm setting of the suspension setting in Sport + mode ensures the best possible contact
with the road. Select this mode only when driv-
ing on race circuits.
Setting "Comfort" mode
X Press button 0043repeatedly until indicator
lamps 0044and 0087go out.
You have selected Comfort mode.
The AMG AMG Suspension
Suspension System
SystemCOMFORT
COMFORT mes-
sage appears on the multifunction display.
In Comfort mode, the driving characteristics of
your vehicle are more comfortable. Select this
mode if you prefer a more comfortable driving
style, but also when driving at speed on straight
roads, e. g. highways. Parking Assist PARKTRONIC
Important safety notes Parking Assist PARKTRONIC is an electronic
parking aid with ultrasound. It monitors the area around your vehicle using six sensors in the
front bumper and four sensors in the rear
bumper. Parking Assist PARKTRONIC shows you
the distance between your vehicle and a detec-
ted obstacle visually and audibly.
Parking Assist PARKTRONIC is only an aid. It is
not a replacement for your attention to your
immediate surroundings. You are always responsible for safe maneuvering, parking and
exiting a parking space. Make sure that there
are no persons, animals or objects etc., in the
maneuvering area while maneuvering and park-
ing or exiting parking spaces.
! When parking, pay particular attention to
objects above or below the sensors, such as
flower pots or trailer drawbars. Parking Assist
PARKTRONIC does not detect such objects
when they are in the immediate vicinity of the vehicle. You could damage the vehicle or the
objects.
The sensors may not detect snow and other
objects that absorb ultrasonic waves.
Ultrasonic sources such as an automatic car
wash, the compressed-air brakes of a truck or
a pneumatic drill could cause Parking Assist
PARKTRONIC to malfunction.
Parking Assist PARKTRONIC may not function
correctly on uneven terrain.
Parking Assist PARKTRONIC is activated auto-
matically when you:
R switch on the ignition
R shift the transmission to position 005B,005Eor
005C
Parking Assist PARKTRONIC is deactivated at
speeds above approx. 11 mph (18 km/h). It is
reactivated at lower speeds.
Range of the sensors General notes
Parking Assist PARKTRONIC does not take into
account obstacles located:
R below the detection range, e.g. people, ani-
mals or objects.
R above the detection range, e.g. overhanging
loads, truck overhangs or loading ramps. 148
Driving systemsDriving and parking