2015 MERCEDES-BENZ S-CLASS COUPE check engine

the case if you are not depressing the brake
pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts immedi-
ately.
A check which periodically establishes a radio
connection between the vehicle and the key
determines whether a valid key is in the vehi- cle. This occurs, for example, when starting
the engine.
To start the vehicle without actively using the
key:
R the Start/Stop button must be inserted in
the ignition lock
R the key must be in the vehicle
R the vehicle must not be locked with the key
or KEYLESS-GO (Y page 85)
Do not keep the key:
R with electronic devices, e.g. a mobile
phone or another key
R with metallic objects, e.g. coins or metal
film
R inside metallic objects, e.g. a metal case
This can affect the key's functionality.
If you lock the vehicle with the key's remote
control or with KEYLESS-GO, after a short
time:
R you will not be able to switch on the ignition
with the Start/Stop button
R you will not be able to start the engine with
the Start/Stop button until the vehicle is
unlocked again
If you lock the vehicle centrally using the but- ton on the front door (Y page 91), you can
continue to start the engine with the Start/
Stop button.
The engine can be switched off while the vehi-
cle is in motion by pressing and holding the
Start/Stop button for three seconds. This
function operates independently of the ECO
start/stop automatic engine switch-off func-
tion. Key positions with the Start/Stop button
:
Start/Stop button
; Ignition lock
When you switch on the ignition, all of the
indicator lamps in the instrument cluster light up. Further information on situations where
an indicator lamp either fails to go out after
starting the engine or lights up while driving
(Y page 304).
If Start/Stop button :has not yet been
pressed, this corresponds to the key being
removed from the ignition.
X To switch on the power supply: press
Start/Stop button :once.
The power supply is switched on. You can
now activate the windscreen wipers, for
example.
The power supply is switched off again if:
R the driver's door is opened and
R you press Start/Stop button :twice when
in this position
X To switch on the ignition: press Start/
Stop button :twice.
The ignition is switched on.
The ignition is switched off again if:
R you do not start the engine within
15 minute s when inthis position
R you press Start/Stop button :once when
in this position.
The power supply is switched off again if:
R the driver's door is opened and
R you press Start/Stop button :twice when
in this position 162
DrivingDriving an
d parking

Removing the Start/Stop button
You can remove the Start/Stop button from
the ignition lock and start the vehicle as nor-
mal using the key.
It is only possible to switch between Start/
Stop button mode and key operation when
the transmission is in position P.
X Remove Start/Stop button :from ignition
lock ;.
You do not have to remove the Start/Stop
button from the ignition lock when you leave
the vehicle. You should, however, always take the key with you when leaving the vehicle. As
long as the key is in the vehicle:
R the vehicle can be started using the Start/
Stop button
R the electrically powered equipment can be
operated Starting the vehicle
Important safety notes G
WARNING
If children are left unsupervised in the vehicle, they can:
R open doors and endanger other persons or
road users
R climb out and be injured by the traffic
R operate vehicle equipment and, for exam-
ple, trap themselves.
Children could also set the vehicle in motion, for example by:
R releasing the parking brake
R shifting the automatic transmission out of
park position P
R starting the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the key
with you and lock the vehicle. Never leave
children unattended in the vehicle. Always
keep the key out of reach of children. G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation. G
WARNING
Flammable materials introduced through
environmental influence or by animals can
ignite if in contact with the exhaust system or parts of the engine that heat up. There is a risk
of fire.
Carry out regular checks to make sure that
there are no flammable foreign materials in
the engine compartment or in the exhaust
system.
! Do not depress the accelerator when
starting the engine.
General notes The engine runs at a higher engine speed dur-
ing the cold start procedure so that the cata-
lytic converter can reach operating tempera-
ture more quickly. The sound of the engine
may change as a result.
Automatic transmission X
Shift the transmission to position P
(Y page 170).
The transmission position indicator in the
multifunction display shows P
(Y page 171).
You can start the engine in transmission posi-
tion Pand N.
Starting procedure with the key To start the engine using the key instead of
the Start/Stop button, pull the Start/Stop
button out of the ignition lock. Driving
163Driving and parking Z

Problem
Possible causes/consequences and
M
MSolutions The coolant tempera-
ture display is showing
more than 120 †. A
display message may
also appear in the mul-
tifunction display and a
warning tone may
sound. The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X Stop as soon as possible and allow the engine and the coolant to
cool down.
X Check the coolant level (Y page 342). Observe the warning
notes as you do so and top up the coolant if necessary. If the coolant level is correct, the engine radiator fan may be faulty.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X If the coolant temperature is below 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic. Automatic transmission
Important safety notes
G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor R,
the vehicle could pull away suddenly. There is a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do not simultaneously accelerate. G
WARNING
The automatic transmission switches to neu-
tral position Nwhen you switch off the engine.
The vehicle may roll away. There is a risk of an
accident.
After switching off the engine, always switch
to parking position P. Prevent the parked vehi-
cle from rolling away by applying the parking
brake. DIRECT SELECT lever
Overview of transmission positions j
Park position with parking lock
k Reverse gear
i Neutral
h Drive
The DIRECT SELECT lever is on the right of the
steering column.
The DIRECT SELECT lever always returns to
its original position. The current transmission position P,R, Nor Dappears in the transmis-
sion position display (Y page 171) in the mul-
tifunction display. Automatic transmission
169Driving and parking Z

If you switch the engine off with the trans-
mission in position Ror D, the automatic
transmission shifts to Nautomatically.
With the key: if you then open the driver's
door or the front-passenger door or remove
the key from the ignition, the automatic trans- mission shifts to Pautomatically.
With the Start/Stop button: if you then
open the driver's door or the front-passenger
door, the automatic transmission shifts to P
automatically.
If you want the automatic transmission to
remain in neutral N, e.g. when having the
vehicle cleaned in an automatic car wash with a towing system:
With the key:
X Switch the ignition on.
X Depress the brake pedal and keep it
depressed.
X Shift to neutral N.
X Release the brake pedal.
X Release the electric parking brake.
X Switch off the ignition and leave the key in
the ignition lock.
With the Start/Stop button: X Remove the Start/Stop button from the
ignition lock.
X Insert the key into the ignition lock.
X Switch the ignition on.
X Depress the brake pedal and keep it
depressed.
X Shift to neutral N.
X Release the brake pedal.
X Release the electric parking brake.
X Switch off the ignition and leave the key in
the ignition lock. Engaging drive position D X
If the transmission is in position Ror N:
push the DIRECT SELECT lever down past
the first point of resistance.
X If the transmission is in position P: depress
the brake pedal and push the DIRECT
SELECT lever down past the first point of
resistance. Transmission position display
All vehicles (except Mercedes-AMG
vehicles) The current transmission position and drive
program appear in the multifunction display.
:
Transmission position
; Gear
= Drive program
The arrows in the transmission position dis-
play show how and into which transmission
positions you can shift using the DIRECT
SELECT lever.
If the transmission position display in the mul-
tifunction display is not working, you should
pull away carefully to check whether the
desired transmission position is engaged.
Ideally, you should select transmission posi-
tion Dand drive program Eor S.
Mercedes-AMG vehicles The current transmission position and drive
program appear in the multifunction display. Automatic transmission
171Driving and parking Z

:
Transmission position
; Drive program
The arrows in the transmission position dis-
play show how and into which transmission
positions you can shift using the DIRECT
SELECT lever.
If the transmission position display in the mul-
tifunction display is not working, you should
pull away carefully to check whether the
desired transmission position is engaged.
Ideally, you should select transmission posi-
tion Dand drive program Cor S. Transmission positions
B Park position
This prevents the vehicle from roll-
ing away when stopped. Only shift
the transmission into position P
when the vehicle is stationary
(Y page 170).
Park position Pis automatically
engaged if:
R you switch off the engine using
the key and remove the key
R you switch off the engine using
the key or using the Start/Stop
button and open the driver's
door or front-passenger door
R you open the driver's door when
the vehicle is stationary or when
driving at a very low speed and
the transmission is in position D
or R. C Reverse gear
Only shift the transmission into
position
Rwhen the vehicle is sta-
tionary. 172
Automatic transmissionDriving and parking

Problems with the transmission
Problem
Possible causes/consequences and
M
MSolutions The transmission has
problems shifting gear. The transmission is losing oil.
X Have the transmission checked at a qualified specialist work-
shop immediately. 7G-TRONIC:
The acceleration ability
is deteriorating.
The transmission no
longer changes gear.
The transmission is in emergency mode.
It is only possible to shift into
secondgear and reverse gear.
X Stop.
X Shift the transmission to position P.
X Switch off the engine.
X Wait at least ten seconds before restarting the engine.
X Shift the transmission to position Dor R.
X Have the transmission checked at a qualified specialist work-
shop immediately. 9G-TRONIC:
The acceleration ability
is deteriorating.
The transmission no
longer changes gear.
The transmission is in emergency mode.
It is only partly possible to engage the gears or the transmission is
in position N.
X Stop.
X Shift the transmission to position P.
X Switch off the engine.
X Wait at least ten seconds before restarting the engine.
X Shift the transmission to position Dor R.
X Have the transmission checked at a qualified specialist work-
shop immediately. Refuelling
Important safety notes
G
WARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is a risk of fire and explo-
sion.
You must avoid fire, naked flames, creating
sparks and smoking. Switch off the engine
and, if applicable, the auxiliary heating before refuelling. G
WARNING
Fuels are poisonous and hazardous to health. There is a danger of injury.
Do not swallow fuel or let it come into contact
with skin, eyes or clothing. Do not inhale fuel
vapours. Keep fuels out of the reach of chil-
dren. 178
RefuellingDriving and parking

X
Release the brake pedal.
X Release the electric parking brake.
X Switch off the ignition and leave the key in
the ignition lock.
The engine can be switched off while the vehi-
cle is in motion by pressing and holding the
Start/Stop button for about three seconds.
This function operates independently of the
ECO start/stop automatic engine switch-off
function. Electric parking brake
General notes G
WARNING
If you leave children unattended in the vehi-
cle, they may be able to set the vehicle in
motion if, for example, they:
R release the parking brake
R shift the automatic transmission out of park
position P
R start the engine
In addition, they may operate vehicle equip-
ment and become trapped. There is a risk of
an accident and injury.
When leaving the vehicle, always take the key
with you and lock the vehicle. Never leave
children unattended in the vehicle.
The function of the electric parking brake is
dependent on the on-board voltage. If the on-
board voltage is low or if there is a malfunc-
tion in the system, it may not be possible to
apply the released parking brake.
X If this is the case, only park the vehicle on
level ground and secure it to prevent it from
rolling away.
X Shift the automatic transmission to posi-
tion P.
It may not be possible to release an applied
parking brake if the on-board voltage is low or
if there is a malfunction in the system. Con-
tact a qualified specialist workshop. The electric parking brake carries out a func-
tion check at regular intervals when the
engine is switched off. Noises that occur are
normal.
Applying or releasing manually X
To apply: push handle :.
When the electric parking brake is applied,
the red !indicator lamp lights up in the
instrument cluster.
The electric parking brake can also be
applied when the key is removed.
X To release: pull handle:.
The red !indicator lamp in the instru-
ment cluster goes out.
The electric parking brake can only be
released:
R when the key is in position 1or 2in the
ignition lock (Y page 161) or
R if the ignition was switched on using the
Start/Stop button
Applying automatically The electric parking brake is automatically
applied when the transmission is in position P
and:
R the engine is switched off or
R the driver is not wearing a seat belt and the
driver's door is opened.
To prevent the electric parking brake from
being automatically applied, pull handle :. Pa
rking
183Driving an d parking Z

downhill gradients. Take particular note of
this when driving a laden vehicle. 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 over-
heating and wearing too quickly.
Important safety notes If you fail to adapt your driving style, SPEED-
TRONIC can neither reduce the risk of an
accident nor override the laws of physics.
SPEEDTRONIC cannot take into account
road, weather or traffic conditions. SPEED-
TRONIC 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 stay-
ing in lane.
If there is a change of drivers, advise the new
driver of the speed stored.
Variable SPEEDTRONIC General notes
:
To store the current speed or a higher
speed
; LIM indicator lamp
= To store the current speed and call up the
last stored speed
? To store the current speed or a lower
speed
A To switch between cruise control or
DISTRONIC PLUS and variable SPEED-
TRONIC
B To deactivate variable SPEEDTRONIC With the cruise control lever, you can operate
cruise control or DISTRONIC PLUS and vari-
able SPEEDTRONIC.
The LIM indicator lamp on the cruise control
lever indicates which system you have selec-
ted:
R LIM indicator lamp off: cruise control or
DISTRONIC PLUS is selected.
R LIM indicator lamp on: variable SPEED-
TRONIC is selected.
You can use the cruise control lever to limit
the speed to any speed above 30 km/ hwhile
the engine is running.
Selecting variable SPEEDTRONIC If there is a change of drivers, advise the new
driver of the limit speed stored.
X Check whether LIM indicator lamp :is on.
If it is on, variable SPEEDTRONIC is already
selected.
If it is not, press the cruise control lever in
the direction of arrow ;.
LIM indicator lamp :in the cruise control
lever is on. Variable SPEEDTRONIC is selec-
ted. 192
Driving systemsDriving and parking