2019 MERCEDES-BENZ AMG GT ROADSTER overheating

running an enclosed space without adequate
ventilation.
Certain engine systems are designed to keep
the level of poisonous components in exhaust
fumes within legal limits.
These systems only work at peak efficiency if
they are serviced exactly in accordance with the manufacturer's specifications. Always have
work on the engine carried out at a qualified
specialist workshop. Mercedes-Benz recom-
mends that you use an authorized Mercedes-
Benz Center for this purpose. In particular, work
relevant to safety or on safety-related systems
must be carried out at a qualified specialist
workshop.
The engine settings must not be changed under
any circumstances. Furthermore, all specific
service work must be carried out at regular
intervals and in accordance with the Mercedes- Benz service requirements.
You can obtain current information concerning
the servicing of your vehicle at any time from a
qualified specialist workshop. This could be an
overview of the maintenance work or any addi-
tional maintenance work, for example. Braking
Important safety notes G
WARNING
If you shift down on a slippery road surface in an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine brak-
ing on a slippery road surface.
Downhill gradients !
On long and steep gradients, you must
reduce the load on the brakes by shifting to a
lower gear in good time. This allows you to
take advantage of the engine's braking effect.
This helps you to avoid overheating the
brakes and wearing them out excessively.
When you take advantage of engine braking, a drive wheel may not turn for some time, e.g.
on a slippery road surface. This could cause damage to the drive train. This type of damage
is not covered by the Mercedes-Benz war-
ranty.
Heavy and light loads G
WARNING
If you rest your foot on the brake pedal while
driving, the braking system can overheat. This increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
! Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
If the brakes have been subjected to a heavy
load, do not stop the vehicle immediately. Drive on for a short while. This allows the airflow to
cool the brakes more quickly.
Wet roads If you have driven for a long time in heavy rain
without braking, there may be a delayed reac-
tion from the brakes when braking for the first
time. This may also occur after the vehicle has
been washed or driven through deep water.
You have to depress the brake pedal more
firmly. Maintain a greater distance from the
vehicle in front.
After driving on a wet road or having the vehicle
washed, brake firmly while paying attention to
the traffic conditions. This will warm up the
brake discs, thereby drying them more quickly
and protecting them against corrosion.
Limited braking performance on salt-
treated roads If you drive on salted roads, a layer of salt resi-
due may form on the brake discs and brake
pads. This can result in a significantly longer
braking distance.132
Driving tipsDriving and parking

brakes from overheating and wearing too
quickly.
Use cruise control only if road and traffic con-
ditions make it appropriate to maintain a steady speed for a prolonged period. You can store any
road speed above 20 mph (30 km/h).
Cruise control lever 0043
Activates or increases speed
0044 Activates at the current speed or last stored
speed
0087 Activates or reduces speed
0085 Deactivates cruise control
When you activate cruise control, the stored
speed is shown in the multifunction display for
five seconds. In addition, the 00ECsymbol
appears in the multifunction display.
Speedometer with segments: when cruise
control is activated, the segments from the
stored speed to the end of the scale light up.
Storing and maintaining the current
speed You can store the current speed if you are driv-
ing faster than 20 mph (30 km/
h).X
Accelerate the vehicle to the desired speed.
X Briefly press the cruise control lever up 0043or
down 0044.
X Remove your foot from the accelerator pedal.
Cruise control is activated. The vehicle auto-
matically maintains the stored speed.
i Cruise control may be unable to maintain
the stored speed on uphill gradients. The
stored speed is resumed when the gradient
evens out. Cruise control maintains the
stored speed on downhill gradients by auto-
matically applying the brakes.
Storing, maintaining and calling up a
speed G
WARNING
If you call up the stored speed and it is lower
than the current speed, the vehicle deceler-
ates. If you do not know the stored speed, the vehicle could decelerate unexpectedly. There
is a risk of an accident.
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 cruise control is activated, it
stores the current speed or regulates the
speed of the vehicle to the previously stored
speed. Driving systems
135Driving and parking Z

Setting a speed
Keep in mind that it may take a brief moment
until the vehicle has accelerated or braked to
the speed set.
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 press
the cruise control lever up 0043or down 0044
beyond the pressure point.
Every time the cruise control lever is pressed
up 0043 or down 0044the last speed stored is
increased or reduced.
i Cruise control is not deactivated if you
depress the accelerator pedal. If you acceler-
ate to overtake, cruise control adjusts the
vehicle's speed to the last speed stored after
you have finished overtaking.
Deactivating cruise control There are several ways to deactivate cruise con-
trol:
X Briefly press the cruise control lever for-
wards 0043.
or
X Brake.
Cruise control is automatically deactivated
under the following conditions:
R the electric parking brake is applied.
R you are driving slower than 20 mph
(30 km/h).
R if ESP ®
intervenes or you deactivate ESP ®
.
R you shift the transmission to position 005C
while driving.
If cruise control is deactivated, a warning tone
sounds. You will see the Cruise Control Off Cruise Control Off
message in the multifunction display for approx-
imately five seconds.
i When you switch off the engine, the last
speed stored is cleared. Active Distance Assist DISTRONIC
General notes Active Distance Assist DISTRONIC regulates the
speed and automatically helps you maintain the
distance from the vehicle detected in front.
Vehicles are detected with the aid of the radar
sensor system. Active Distance Assist
DISTRONIC brakes automatically so that the set
speed is not exceeded.
Change into a lower gear in good time on long
and steep downhill gradients. This is especially
important if the vehicle is laden. By doing so, you will make use of the braking effect of the engine.
This relieves the load on the brake system and
prevents the brakes from overheating and wear- ing too quickly.
If Active Distance Assist DISTRONIC detects
that there is a risk of a collision with the vehicle
in front, you will be warned visually and audibly.
Active Distance Assist DISTRONIC cannot pre-
vent a collision without your intervention. An
intermittent warning tone will then sound and
the distance warning lamp will light up in the
instrument cluster. Brake immediately in order
to increase the distance to the vehicle in front or take evasive action provided it is safe to do so. 136
Driving systemsDriving and parking

Display messages
Possible causes/consequences and
0050
0050Solutions Reversing
Reversing
Not
NotPossi‐
Possi‐
ble
ble Service
Service Required
Required The sub-transmission with the even gears has failed. You can no longer
engage reverse gear. The smoothness of the gear change is restricted.
The transmission is in emergency mode.
A warning tone also sounds.
X Visit a qualified specialist workshop. Transmission Mal‐ Transmission Mal‐
function Stop function Stop A malfunction has occurred in the mechanical transmission compo-
nents.
A warning tone also sounds. The transmission shifts automatically to position 005C.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Shift the selector lever to position 005D.
X Secure the vehicle against rolling away (Y page 127).
X Notify a qualified specialist workshop or breakdown service. Depress Brake to Depress Brake to
Start Engine Start Engine You cannot start the engine. The engine has been switched off in
005Bor
005E.
X Depress the brake pedal and start the engine. Only Shift to 'P'
Only Shift to 'P'
when when
Vehicle
Vehicle is
isSta‐
Sta‐
tionary
tionary The vehicle is moving.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Shift the transmission to position 005D.005D
Parking Lock Mal‐ Parking Lock Mal‐
funct. Apply Park‐ funct. Apply Park‐
ing Brake ing Brake The transmission position
005Dcannot be selected.
X Make sure that the electric parking brake is applied.
X Prevent the vehicle from rolling away before you leave it
(Y page 282).
X Visit a qualified specialist workshop. 0080
Transmission Oil Transmission Oil
Cooling Malfunction Cooling Malfunction The transmission coolant pump is faulty. The transmission may over-
heat.
X In the on-board computer, select the AMG
AMGmenu and check the
transmission oil temperature (Y page 170).
X Avoid excessive loading, e.g. due to dynamic driving.
X If the transmission oil temperature is below 248 °F (120 °C), drive
on to the nearest qualified specialist workshop. 0080
Trans. Oil Overhea‐ Trans. Oil Overhea‐
ted Drive on with ted Drive on with
Care Care The transmission oil has overheated.
Manual mode
Mand temporary manual drive program are no longer
available. Only the Comfortdrive program is available for the trans-
mission. The engine output is reduced according to the degree of
overheating.
X Allow the transmission oil to cool by adopting a defensive driving
style. Display
messages
195On-board computer and displays Z

Coolant
Important safety notes G
WARNING
If antifreeze comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Let the engine cool down before you add anti-
freeze. Make sure that antifreeze is not spilled
next to the filler neck. Thoroughly clean the
antifreeze from components before starting
the engine.
! Only add coolant that has been premixed
with the desired antifreeze protection. You
could otherwise damage the engine.
You can find additional notes on the coolant in
the following places:
R in the Mercedes-Benz Specifications for
Service Products, MB BeVo 310.1
- on the Internet at
http://bevo.mercedes-benz.com
- on the Mercedes-Benz BeVo app
R a qualified specialized workshop
! Always use a suitable coolant mixture, even
in countries where high temperatures prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating.
i Have the coolant regularly replaced at a
qualified specialist workshop and the replace- ment confirmed in the service report.
Comply with the important safety notes for ser- vice products when handling coolant
(Y page 289).
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the fol-
lowing tasks:
R anti-corrosion protection
R antifreeze protection
R raising the boiling point
If the coolant has antifreeze protection down to
-35 ‡ (-37 †), the boiling point of the coolant
during operation is approximately 266 ‡
(130 †). The antifreeze concentrate/corrosion inhibitor
concentration in the engine cooling system
should:
R be at least 50%. This will protect the engine
cooling system against freezing down to
approximately -35 ‡ (-37 †).
R not exceed 55% (antifreeze protection down
to -49 ‡[-45 †]). Otherwise, heat will not be
dissipated as effectively.
Mercedes-Benz recommends an antifreeze/
corrosion inhibitor concentrate in accordance
with MB Specifications for Service Products
310.1.
The coolant is checked with every maintenance interval at a qualified specialist workshop.
i When the vehicle is first delivered, it is filled
with a coolant mixture that ensures adequate
antifreeze and anti-corrosion protection.
i The coolant is checked at specified intervals
at a qualified specialist workshop.
Filling capacities Model Capacity
Mercedes-AMG GT
Roadster
13.5 US qt (12.8
l) Mercedes–AMG GT
C Roadster
14.6 US qt (13.8
l) Windshield washer system
Important safety notes G
WARNING
Windshield washer concentrate is highly flam- mable. If windshield washer concentrate getsonto hot components of the engine or the
exhaust system, it can ignite. There is a risk of
fire and injury.
Make sure that windshield washer concen-
trate is not spilled in the vicinity of the filler
neck.
! Only use washer fluid which is suitable for
lamp lenses, e.g. MB SummerFit or MB Win-
terFit. Unsuitable washer fluid may damage
the lamp lenses of the headlamps. 292
Service products and filling capacitiesTechnical data