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

In addition, at least one of the following condi-
tions must be fulfilled:
R there is a system malfunction
R the power supply is insufficient
R the vehicle is stationary for a lengthy period
The red 0049(USA only) or 0024(Canada only)
indicator lamp in the instrument cluster lights
up.
The electric parking brake is not automatically
applied if the engine is switched off by the ECO
start/stop function.
Releasing automatically The electric parking brake is released when the
following conditions are fulfilled:
R The engine is running
R The seat belt tongue is engaged in the belt
buckle
R the transmission is in position 005Bor005E and
you depress the accelerator pedal or shift
from position 005Dto005B or005E
R if the transmission is in position 005E, the trunk
lid must be closed
If the seat belt tongue is not engaged in the seat belt buckle, the following conditions must be
fulfilled:
R the driver's door and front-passenger door
are closed
R you move the transmission out of position 005D
or you have previously driven at a speed
above 2 mph (3 km/h)
R if the transmission is in position 005E, the trunk
lid must be closed
When the electric parking brake is released, the red 0049 (USA only) or 0024(Canada only) indi-
cator lamp goes out in the instrument cluster.
Emergency braking The vehicle can also be braked during an emer-
gency by using the electric parking brake.
X While driving, push handle 0043of the electric
parking brake (Y page 129).
The vehicle is braked as long as you keep
handle 0043of the electric parking brake
pressed. The longer electric parking brake
handle 0043is depressed, the greater the brak-
ing force. During braking:
R a warning tone sounds
R the Please Release Parking Brake
Please Release Parking Brake mes-
sage appears
R the red 0049(USA only) or 0024(Canada
only) indicator lamp in the instrument cluster
flashes
When the vehicle has been braked to a stand-
still, the electric parking brake is applied. Parking the vehicle for a long period
General notes If you leave the vehicle parked for longer than
four weeks, the battery may be damaged by
exhaustive discharging.
If you leave the vehicle parked for longer than six weeks, the vehicle may suffer damage as a
result of lack of use.
X Visit a qualified specialist workshop and seek
advice.
Trickle charging the on-board electrical
system battery The battery may drain if the vehicle is left sta-
tionary for long periods. In this case, Mercedes-
Benz recommends attaching the trickle charger to 12 V socket 0043in the trunk.
i A trickle charger and further information
can be obtained from a qualified specialist
workshop.
X Switch the ignition off.
X Open the trunk lid. 130
ParkingDriving and parking

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

Resetting the RACETIMER
X
Press the 0064or0063 button to select Stop
Stop.
The RACETIMER is stopped.
X Press the 0064or0063 button to select
Reset
Reset.
X Press 0076to confirm.
All laps are deleted.
Lap statistics 0043
Lap
0044 Lap time 0087
Average lap speed
0085 Lap length
This function is only available if you have stored
at least two laps and have stopped the RACE-
TIMER.
X Use 00E2 on the steering wheel to call up the
list of menus.
X Press the 0064or0063 button on the steering
wheel to select the AMG AMGmenu.
X Confirm by pressing 0076on the steering
wheel.
X Press 0064or0063 to select Lap List
Lap List .
X Press 0076to confirm.
The lap statistics are displayed.
X Press the 0063or0064 button to select a dif-
ferent lap evaluation.
The fastest lap is indicated by flashing sym-
bol 0043. Display messages
Introduction
General notes Display messages appear in the multifunction display.
Display messages with graphic displays may be shown in simplified form in the Operator's Manual
and may therefore differ from the multifunction display.
Please respond in accordance with the display messages and follow the additional notes in this
Operator's Manual.
With certain display messages, you will also hear a warning tone.
You can hide the display messages. The display messages are then stored in the message memory.
Rectify the cause of a display message as soon as possible. Display messages
173On-board computer and displays Z

Should it, in exceptional circumstances, be
absolutely necessary to disconnect the 12-
volt battery yourself, please observe the fol-
lowing:
R Secure the vehicle to prevent it from rolling
away.
R Switch off the ignition.
R Disconnect the negative terminal first and
then the positive terminal.
The transmission is locked in position 005D
after disconnecting the battery.
After the work has been done, install the bat-
tery and replace the cover of the positive ter- minal clamp firmly.
Comply with safety precautions and take pro-
tective measures when handling batteries. Risk of explosion.
Fire, open flames and smoking are
prohibited when handling the bat-
tery. Avoid creating sparks.
The electrolyte of the battery is cor-
rosive. Avoid contact with skin, eyes
or clothing.
Wear suitable protective clothing,
especially gloves, apron and face-
guard.
Immediately rinse electrolyte
splashes off with clean water. Con-
tact a physician if necessary. Wear eye protection.
Keep children away.
Observe this Operator's Manual.
For safety reasons, Mercedes-Benz recom-
mends that you only use batteries which have
been tested and approved for your vehicle by
Mercedes-Benz. These batteries provide
increased impact protection to prevent vehicle
occupants from suffering acid burns should the battery be damaged in the event of an accident. In order for the battery to achieve the maximum
possible service life, it must always be suffi-
ciently charged.
Like other batteries, the vehicle battery may
discharge over time if you do not use the vehicle.In this case, have the battery disconnected at a
qualified specialist workshop. You can also
charge the battery with a special charger rec-
ommended by Mercedes-Benz. Contact a quali- fied specialist workshop for further information.
Have the battery condition of charge checked
more frequently if you use the vehicle mainly for
short trips or if you leave it standing idle for a
lengthy period. Consult a qualified specialist
workshop if you wish to leave your vehicle
parked for a long period of time.
When you use the SmartKey in the ignition and
you park the car, remove the SmartKey if you do not require any electrical consumers. The vehi-
cle will then use very little energy, thus conserv-
ing battery power.
If the power supply has been interrupted, e.g. if
you reconnect the battery, you will have to:
R reset the function for automatically folding
the exterior mirrors in/out by folding the mir-
rors out once (Y page 92)
R reset the side windows, see (Y page 78) Charging the battery
! Only use battery chargers with a maximum
charging voltage of 14.4 V.
! Only
charge the battery using the jump-
starting connection point.
The jump-starting connection point is in the
engine compartment (Y page 256).
X Open the hood.
X Connect the battery charger to the positive
terminal and ground point in the same order
as when connecting the donor battery in the
jump-starting procedure (Y page 256).
Keep away from fire and open flames. Do not
lean over a battery. Never charge the battery if it is still installed in the vehicle, unless you use a
battery charger which has been tested and
approved by Mercedes-Benz. A battery charger
unit specially adapted for Mercedes-Benz vehi-
cles and tested and approved by Mercedes-
Benz is available as an accessory. It permits the
charging of the battery in its installed position.
Contact an authorized Mercedes-Benz Center Battery (vehicle)
255Breakdown assistance Z

for further information and availability. Read the
battery charger's operating instructions before
charging the battery.
Do not charge a battery which has been
removed at low temperatures with a battery
charger. Allow the battery to warm up gently
first, if necessary. Otherwise, the service life can be shortened and the starting characteristics
impaired, especially at low temperatures. Replacing the 12 V battery
Observe the notes on the 12 V battery
(Y page 254).
Mercedes-Benz recommends that you have the
12 V battery replaced at a qualified specialist
workshop, e.g. at an authorized Mercedes-Benz
Center.
If you want to replace the battery yourself,
observe the following notes:
R Always replace a defective battery with a bat-
tery which meets the specific requirements of
the vehicle. The vehicle is equipped with an AGM (Absorb-
ent Glass Mat) technology battery or a lith-
ium-ion battery. Full vehicle functionality is
only guaranteed with an AGM or lithium-ion
battery. For safety reasons, Mercedes-Benz
recommends that you only use batteries
which have been tested and approved for yourvehicle by Mercedes-Benz.
R Use detachable parts such as breather hoses,
angled connecting pieces or terminal covers
from the battery which is to be replaced.
R Make sure that the vent hose is always con-
nected to the original opening on the battery
side.
Install any existing or supplied stop plugs.
Otherwise, gases or battery acid could
escape.
R Make sure that the detachable parts are con-
nected again in the same way. Jump-starting
X For the jump-starting procedure, use only the jump-starting connection point in the engine com-
partment, consisting of a positive terminal and a ground point.
! Avoid repeated and lengthy starting attempts. Otherwise, the catalytic converter could be
damaged by the non-combusted fuel.
X Do not start the vehicle using a rapid charging device.
If your vehicle's battery is discharged, the engine can be jump-started from another vehicle or
from a donor battery using jumper cables.
The battery is not accessible in all vehicles. If the other vehicle's battery is not accessible, jump-start the vehicle using a donor battery or a jump-starting device.
Observe the following during the jump-starting procedure:
R the jumper cables must not come into contact with parts that can move when the engine is
running, such as the V-belt pulley or the fan.
R non-insulated parts of the terminal clamps must not come into contact with other metal parts
while the jumper cables are connected to the battery and the jump-starting connection point.
R only use jumper cables that are not damaged and have a sufficient cross-section and insulated
terminal clamps.
R jump-starting may be performed only using batteries with a nominal voltage of 12 V.
R you may only jump-start the vehicle when the engine and exhaust system are cold.
R the vehicles must not touch each other.
R If the battery is fully discharged, leave the battery that is being used to jump-start connected for
a few minutes before attempting to start. This charges the battery slightly. 256
Jump-startingBreakdown assistance

Dimensions and weights
Missing values were not available at time of
going to print. 0043
0043
Opening height Rear spoiler retrac-
ted (all models)
66.5 in (1688 mm)
Rear spoiler retrac-
ted, Mercedes‑
AMG
GT C Roadster 66.5 in (1690 mm)
Rear spoiler exten-
ded,
Mercedes
‑AMG
GT Roadster 66.7 in (1696 mm)
Rear spoiler exten-
ded,
Mercedes
‑AMG
GT C Roadster 66.8 in (1697 mm)
All models
Vehicle length
179.4 in
(4558 mm) Vehicle length,
Mercedes
‑AMG
GT C Roadster 179.7 in
(4565 mm) Vehicle width including
outside mirrors
81.7 in
(2075 mm) Vehicle width without
exterior mirrors
76.3 in
(1939 mm) Vehicle width excluding
exterior mirrors,
Mercedes
‑AMG
GT C Roadster 78.5 in
(1996 mm) All models
Vehicle height
49.5 in
(1259 mm) Vehicle height,
Mercedes
‑AMG
GT C Roadster 49.6 in
(1260 mm) Wheelbase
103.5 in
(2630 mm) Turning radius
480.3 in
(12.20 m) Maximum trunk load294
Vehicle dataTechnical data