engine MERCEDES-BENZ SLK ROADSTER 2014 Service Manual

the front-passenger side as well. The indi-
cator lamp in the ábutton goes out.
R Use the residual heat function if you want to
heat or ventilate the vehicle interior when
the ignition is switched off. The residual
heat function can only be activated or deac-
tivated with the ignition switched off.
ECO start/stop function During automatic engine switch-off, the cli-
mate control only operates at a reduced capa- city. If you require full climate control capa-
city, the ECO start/stop function can be
deactivated by pressing the ECO button
(Y page 148). Operating the climate control system
Switching climate control on/off
General notes When the climate control is switched off, the
air supply and air circulation are also
switched off. The windows could mist up.
Therefore, only switch off climate control
briefly.
i Activate climate control primarily using
the à button (Y page 131).
Air-conditioning system X
Turn the key to position 2in the ignition
lock (Y page 141).
X To switch on: turn airflow control C
clockwise to the desired position (except
position 0) (Ypage 127).
X To switch off: turn airflow control Canti-
clockwise to position 0(Ypage 127). THERMOTRONIC automatic climate
control X
Turn the key to position 2in the ignition
lock (Y page 141).
X To switch on: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to
automatic mode.
or
X Press the ^button.
The indicator lamp in the ^button goes
out. The previous settings are reactivated.
X To switch off: press the^button.
The indicator lamp in the ^button lights
up. Activating/deactivating the cooling
with air dehumidification function
General notes If you deactivate the "Cooling with air-dehu-
midification" function, the air inside the vehi-
cle will not be cooled. The air inside the vehi-
cle will also not be dehumidified. The win-
dows can mist up more quickly. Therefore,
only switch off cooling with air dehumidifica-
tion for a short period.
The "Cooling with air dehumidification" func-
tion is only available when the engine is run-
ning. The air inside the vehicle is cooled and
dehumidified according to the temperature
selected.
Condensation may drip from the underside of the vehicle when cooling mode is active. Thisis normal and not a sign that there is a mal-
function. Operating the climate control system
129Climate control

When opening, make sure that nobody is
touching the side window. If someone
becomes trapped, press the Wswitch
immediately to open/close the side window
in the door. The side window stops. To con-
tinue closing the side window, pull on the
W switch.
X Convenience closing feature: press and
hold the gbutton until the side win-
dows are closed.
The indicator lamp in the gbutton lights
up. Air-recirculation mode is activated.
If parts of the body are in the closing area
during convenience closing, proceed as fol-
lows:
X Press the Wbutton for opening/closing
the side windows.
The side window stops.
X To then open the side window, press the
W button again.
i Notes on the reversing feature for the side
windows (Y page 83).
X Convenience opening feature: press and
hold the gbutton until the side win-
dows are opened. The side windows move
back to their original positions.
The indicator lamp in the gbutton goes
out. Air-recirculation mode is deactivated.
i If you open the side windows manually
after closing them with the convenience
closing feature, they will remain in this posi- tion when opened using the convenience
opening feature. Activating/deactivating the residual
heat function
General notes It is possible to make use of the residual heat
of the engine to continue heating the station- ary vehicle for up to 30 minutesafter the
engine has been switched off. The heating
time depends on the temperature that has
been set for the vehicle interior. Depending on the equipment level, the con-
trol panel has either the
Ìbutton or the
Á button.
Activating/deactivating X
Turn the key to position 0in the ignition
lock or remove it (Y page 141).
X To switch on: press theÌorÁ but-
ton.
The indicator lamp in the ÌorÁ
button lights up.
i The blower will run at a low speed regard-
less of the airflow setting.
i If you activate the residual heat function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.
X To switch off: press theÌorÁ
button.
The indicator lamp in the ÌorÁ
button goes out.
Residual heat is deactivated automatically: R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops Adjusting the air vents
Important safety notes
G
WARNING
Very hot or very cold air can flow from the air vents. This could result in burns or frostbite in the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior. G
WARNING
When AIRSCARF is switched on, very hot air
can flow from the vents in the head restraints. Adjusting the air vents
135Climate control
Z

This could result in burns in the immediate
vicinity of the air vents. There is a risk of injury.
Reduce the heater output before it becomes
too hot.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior, please observe the following notes:
R keep the air inlet grille on the bonnet and in
the engine compartment on the front-
passenger side free of blockages, such as
ice, snow or leaves.
R never cover the vents or ventilation grilles
in the vehicle interior.
i You can move the adjusters for the air
vents vertically or horizontally to set the
direction of the airflow.
i Optimal climate control function is ach-
ieved by opening the air vents fully and set- ting the adjusters to the middle position. Setting the centre air vents
X
To open the centre air vent: turn the
adjuster in one of centre air vents :anti-
clockwise.
X To close the centre air vent: turn the
adjuster in one of centre air vents :clock-
wise until it engages. Adjusting the side air vents
:
Side window demister vent
; Side air vent
X To open a side air vent: turn the adjuster
in side air vent ;anti-clockwise.
X To close a side air vent: turn the adjuster
in side air vent ;clockwise until it
engages. Setting the blower output of the AIR-
SCARF vents
G
WARNING
Very hot or very cold air can flow from the air vents. This could result in burns or frostbite in the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior. G
WARNING
When AIRSCARF is switched on, very hot air
can flow from the vents in the head restraints. This could result in burns in the immediate
vicinity of the air vents. There is a risk of injury.
Reduce the heater output before it becomes
too hot. 136
Adjusting the air ventsClimate control

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variations are pos- sible. Note that your vehicle may not be
equipped with all of the functions descri-
bed. This is also the case for systems and
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page 24). Running-in notes
Important safety notes
In certain driving and driving safety systems,
the sensors adjust automatically while a cer-
tain distance is being driven after the vehicle has been delivered or after repairs. Full sys-
tem effectiveness is not reached until the end
of this teach-in procedure.
Brake pads/linings and discs that are either
new or have been replaced only achieve opti- mum braking effect after several hundred kil-
ometres of driving. Compensate for the
reduced braking effect by applying greater
force to the brake pedal. The first 1500 km
If you treat the engine with sufficient care
from the very start, you will be rewarded with excellent performance for the remainder of
the engine's life.
R Drive at varying vehicle speeds and engine
speeds for the first 1500 km.
R Avoid overstraining the vehicle during this
period, e.g. driving at full throttle.
R Change gear in good time, before the rev
counter needle is Ôof the way to the red
area of the rev counter. R
Do not shift down a gear manually in order
to brake.
R Vehicles with automatic transmission:
try to avoid depressing the accelerator
pedal beyond the point of resistance (kick- down).
After 1500 km, you may gradually bring the
vehicle up to full road and engine speeds.
Additional running-in notes for AMG vehicles:
R Do not drive at speeds above 140 km/ hfor
the first 1500 km.
R Only briefly allow the engine to reach a
maximum engine speed of 4500 rpm.
i You should also observe these notes on
running-in if the engine or parts of the drive train on your vehicle have been replaced. AMG vehicles with self-locking rear
axle differential
Your vehicle is equipped with a self-locking
differential on the rear axle. Change the oil
after a running-in period of 3000 km to
improve protection of the rear axle differen-
tial. This oil change prolongs the service life of
the differential. Have the oil change carried
out at a qualified specialist workshop. Driving
Important safety notes
G
WARNING
Objects in the driver's footwell may restrict
the clearance around the pedals or block a
depressed pedal. This jeopardises the oper-
ating and road safety of the vehicle. There is a risk of an accident.
Stow all objects securely in the vehicle so that
they do not get into the driver's footwell.
Always fit the floormats securely and as pre-
scribed in order to ensure that there is always sufficient room for the pedals. Do not use
loose floormats and do not place several floor-mats on top of one another. 140
DrivingDriving and parking

G
WARNING
Unsuitable footwear can hinder correct usage of the pedals, e.g.:
R shoes with thick soles
R shoes with high heels
R slippers
There is a risk of an accident.
Wear suitable footwear to ensure correct
usage of the pedals. G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect, for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk of an accident.
Do not switch off the ignition while driving. G
WARNING
If the parking brake has not been fully
released when driving, the parking brake can:
R overheat and cause a fire
R lose its hold function.
There is a risk of fire and an accident. Release
the parking brake fully before driving off.
! Warm up the engine quickly. Do not use
the engine's full performance until it has
reached operating temperature.
Only set the automatic transmission to the
respective drive positions when the vehicle
is stationary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery
roads. Otherwise, you could damage the
drive train.
! AMG vehicles:
at low engine oil temper-
atures (below +20 †), the maximum
engine speed is restricted in order to pro-
tect the engine. To protect the engine and
maintain smooth engine operation, avoid driving at full throttle when the engine is
cold. Key positions
Key g
To remove the key
1 Power supply for some consumers, such
as the windscreen wipers
2 Ignition (power supply for all consumers)
and drive position
3 To start the engine
i If the key does not belong to the vehicle, it
can still be turned in the ignition lock. How-
ever, the ignition will not be switched on.
The engine cannot be started.
KEYLESS-GO General notes
Vehicles with KEYLESS-GO are equipped with
a key featuring an integrated KEYLESS-GO
start function and a detachable Start/Stop
button.
The Start/Stop button must be inserted in the ignition lock and the key must be in the vehi-
cle.
When you insert the Start/Stop button into
the ignition lock, the system needs approx-
imately two seconds recognition time. You
can then use the Start/Stop button.
Pressing the Start/Stop button several times
in succession corresponds to the different
key positions in the ignition lock. This is only Driving
141Driving and parking Z

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 73)
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 function of the key with
KEYLESS-GO.
i The engine can be switched off while the
vehicle 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 function. Key positions with KEYLESS-GO :
Start/Stop button
; Ignition lock
When you switch on the ignition, all of the
indicator lamps in the instrument cluster light up. If an indicator lamp does not go out after
starting the engine or lights up while driving,
see (Y page 252).
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.
i If you then open the driver's door when in
this position, the voltage supply is switched
off.
X To switch on the ignition: press Start/
Stop button :twice.
The ignition is switched on.
i The ignition is switched off if:
R the driver's door is opened and
R you press Start/Stop button :once
when in this position 142
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.
X Remove Start/Stop button :from ignition
lock ;.
i 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 electrically powered equipment can be
operated Starting the engine
Important safety notes G
WARNING
If children are left unsupervised in the vehicle, they could:
R open doors, thereby endangering other per-
sons or road users
R get out and be struck by oncoming traffic
R operate vehicle equipment and become
trapped, for example In addition, the children could also set the
vehicle in motion, for example, if they:
R release the parking brake
R shift the automatic transmission out of park
position P or shift manual transmission into
neutral
R start 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 and animals unattended in the vehi-
cle. Keep the keys out of the 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.
i AMG vehicles:
the exhaust flap of the
exhaust system is checked after each cold start. The sound produced by this proce-
dure is audible.
i Vehicles with a petrol engine:
the
engine runs at a higher engine speed during the cold start procedure so that the cata-
lytic converter can reach operating tem-
perature more quickly. The sound of the
engine may change as a result. Driving
143Driving and parking Z

Manual transmission
X
Depress the brake pedal and keep it
depressed.
X Fully depress the clutch pedal.
X Shift to neutral N.
i You can only start the engine when the
clutch pedal is fully depressed.
Automatic transmission X
Shift the transmission to position P.
The transmission position indicator in the
multifunction display shows P.
i You can also start the engine when the
transmission is in position N.
Starting procedure with the key X
To start a petrol engine: turn the key to
position 3in the ignition lock (Y page 141)
and release it as soon as the engine is run-
ning.
X To start a diesel engine: turn the key to
position 2in the ignition lock (Y page 141).
The % preglow indicator lamp in the
instrument cluster lights up.
X When the %preglow indicator lamp
goes out, turn the key to position 3
(Y page 141) and release it as soon as the
engine is running.
i To start the engine using the key instead
of KEYLESS-GO, pull the Start/Stop button
out of the ignition lock.
i You can start the engine without preglow
if the engine is warm.
Using KEYLESS-GO to start the engine i
The Start/Stop button can be used to
start the vehicle manually without inserting
the key into the ignition lock. The key must
be in the vehicle and the Start/Stop button must be inserted in the ignition lock. This
mode for starting the engine operates inde- pendently of the ECO start/stop automatic
engine start function.
X Depress the brake pedal and keep it
depressed.
X To start a petrol engine: press the Start/
Stop button once (Y page 141).
The engine starts.
X To start a diesel engine: press the Start/
Stop button once (Y page 141).
Preglow is activated and the engine starts. Pulling away
Manual transmission !
Change gear in good time and avoid spin-
ning the wheels. Otherwise, you could dam- age the vehicle.
X Depress the brake pedal and keep it
depressed.
X Depress the clutch pedal fully.
X Shift to either first gear or reverse gear R.
X Release the electric parking brake
(Y page 163).
X Release the brake pedal.
X Slowly release the clutch pedal and gently
depress the accelerator pedal.
i Follow the shift recommendations in the
multifunction display for an economical
driving style (Y page 152).
i The vehicle locks centrally once you have
pulled away. The locking knobs in the doors
drop down.
You can open the doors from the inside at
any time.
You can also deactivate the automatic lock- ing feature (Y page 216).
Automatic transmission G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor R, 144
DrivingDriving and parking

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.
i It is only possible to shift the transmission
from position Pto the desired position if
you depress the brake pedal. Only then is
the shift lock released.
X Depress the brake pedal and keep it
depressed.
X Shift the transmission to position Dor R.
X Release the brake pedal.
X Carefully depress the accelerator pedal.
The electric parking brake (Y page 163) is
automatically released.
i The vehicle locks centrally once you have
pulled away. The locking knobs in the doors
drop down.
You can open the doors from the inside at
any time.
You can also deactivate the automatic lock- ing feature (Y page 216).
i Upshifts take place at higher engine
speeds after a cold start. This helps the
catalytic converter to reach its operating
temperature more quickly.
Hill start assist Hill start assist helps you when pulling away
forwards or in reverse on an uphill gradient. It
holds the vehicle for a short time after you
have removed your foot from the brake pedal. This gives you enough time to move your footfrom the brake pedal to the accelerator pedal
and depress it before the vehicle begins to
roll. G
WARNING
After a short time, hill start assist will no lon-
ger brake your vehicle and it could roll away.
There is a risk of an accident and injury. Therefore, quickly move your foot from the
brake pedal to the accelerator pedal. Never
leave the vehicle when it is held by hill start
assist.
X Remove your foot from the brake pedal.
The vehicle is then held for about a second.
X Pull away.
Hill start assist is not active if: R you are pulling away on a level road or a
downhill gradient.
R the transmission is in position Non vehi-
cles with automatic transmission.
R the electric parking brake is applied.
R ESP ®
is malfunctioning. ECO start/stop function
Introduction The ECO start/stop function switches the
engine off automatically if the vehicle is stop- ped under certain conditions.
When pulling away again, the engine starts
automatically. The ECO start/stop function
thereby helps you to reduce the fuel con-
sumption and emissions of your vehicle.
Important safety notes G
WARNING
If the engine is switched off automatically and you exit the vehicle, the engine is restarted
automatically. The vehicle may begin moving. There is a risk of accident and injury.
If you wish to exit the vehicle, always turn off
the ignition and secure the vehicle against
rolling away. Driving
145Driving an d parking Z

General notes
:
ECO start/stop display (example: colour
multifunction display)
The ECO start/stop function automatically
switches the engine off when the vehicle
stops moving if:
R the è ECO symbol appears in the mul-
tifunction display in vehicles with black and white multifunction display
R the è ECO symbol appears in green in
the multifunction display in vehicles with a colour multifunction display
The ECO start/stop function is activated
whenever you switch on the engine using the key or the Start/Stop button.
If the ECO start/stop function has been man-
ually deactivated (Y page 148) or a malfunc-
tion has caused the system to be deactivated, the è symbol is not displayed.
AMG vehicles: the ECO start/stop function
is only available in drive program C.
i AMG vehicles:
if automatic cylinder shut-
off is active in drive program C, then4, the
number of active cylinders, is also shown in
the è ECO symbol. This means that the
engine is operating with four cylinders.
If cylinder shut-off is not active, the engine
is operating with all eight cylinders. In this
case, 8, the number of active cylinders, is
shown in the èECO symbol. Automatic engine switch-off Operation
The ECO stop/start function is operational
and shows the following in the multifunction
display:
R the è ECO symbol in vehicles with a
black-and-white multifunction display
R a green èECO symbol in vehicles with a
colour multifunction display
This is the case if, among other things:
R the indicator lamp in the ECO button is lit
green
R the outside temperature is within the range
that is suitable for the system
R the engine is at normal operating temper-
ature
R the set temperature for the vehicle interior
has been reached
R the battery is sufficiently charged
R the system detects that the windscreen is
not misted up when the air-conditioning
system is switched on
R the bonnet is closed
R the driver's door is closed and the driver's
seat belt is fastened
If not all conditions for an automatic engine
switch-off are met:
R the è ECO symbol does not appear in
vehicles with a black-and-white multifunc-
tion display
R a yellow èECO symbol appears in vehi-
cles with a colour multifunction display
i All of the vehicle's systems remain active
when the engine is switched off automati-
cally.
i All vehicles (except AMG vehicles):
automatic engine switch-off can take place a maximum of four times consecutively (ini-
tial stop, then three subsequent stops).
In vehicles with a black-and-white multi-
function display, the automatic engine
switch-off is then available again after the 146
DrivingDriving and parking