2014 MERCEDES-BENZ SLK ROADSTER air condition

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

Problems with the "Cooling with air dehumidification" function
Problem
Possible causes/consequences and
M
MSolutions The indicator lamp in
the
¿/Á button
flashes three times or
remains off. The cool-
ing with air dehumidifi-
cation system cannot
be switched on. Cooling with air dehumidification has been deactivated due to a
malfunction.
X Visit a qualified specialist workshop. Setting climate control to automatic
mode
General notes Automatic mode is only available with
THERMOTRONIC automatic air conditioning.
In automatic mode, the set temperature is
maintained automatically at a constant level. The system automatically regulates the tem-
perature of the dispensed air, the airflow and
the air distribution.
The automatic mode functions optimally
when the "Cooling with air dehumidification"
function is activated. If desired, cooling with
air dehumidification can be deactivated.
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.
Activating/switching X
Turn the key to position 2in the ignition
lock (Y page 141).
X Set the desired temperature.
X To activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow
are activated. X
To switch to manual mode: press the
_ button.
or X Press the IorK button.
The indicator lamp in the Ãbutton goes
out. Setting the temperature
Air-conditioning system X
Turn the key to position 2in the ignition
lock (Y page 141).
X To increase/reduce: turn control:
clockwise or anti-clockwise (Y page 127).
Only change the temperature setting in
small increments. Start at 22 †.
i If you turn control
:anti-clockwise to
the lowest temperature setting, air-recircu- lation mode may activate automatically,
depending on the outside temperature.
THERMOTRONIC automatic climate
control Different temperatures can be set for the
driver's and front-passenger sides.
X Turn the key to position 2in the ignition
lock (Y page 141).
X To increase/reduce: turn control:orB
clockwise or anti-clockwise (Y page 128).
Only change the temperature setting in
small increments. Start at 22 †. Operating the climate control system
131Climate control

i
If you turn controls
:and Banti-clock-
wise to the lowest temperature setting, air- recirculation mode may activate automati-
cally, depending on the outside tempera-
ture. Setting the air distribution
Air-conditioning system X
Turn the key to position 2in the ignition
lock (Y page 141).
X Press one or more of the P,O,¯
buttons.
The corresponding indicator lamp comes
on.
The air distribution can be set to the following positions:
¯ Directs the airflow through the demis-
ter vents
O Directs the airflow through the foot-
well air vents
P Directs the airflow through the centre
and side air vents
i You can also activate several of the air
distribution settings simultaneously. In
order to do this, press several of the air
distribution buttons. The air is then routed
through different air vents.
THERMOTRONIC automatic climate
control X
Turn the key to position 2in the ignition
lock (Y page 141).
X Press the _button repeatedly until the
desired symbol appears in the display.
The air distribution can be set to the following positions:
P Directs the airflow through the centre
and side air vents
O Directs the airflow through the foot-
well air vents S
Directs the airflow through the centre
and side air vents as well as the foot-
well air vents
¯ Directs the airflow through the demis-
ter vents
b Directs the airflow through the demis-
ter, centre and side air vents
a Directs the airflow through the foot-
well and demister vents
_ Directs the airflow through the demis-
ter, centre, side and footwell air vents
i Regardless of the air distribution setting,
airflow is always directed through the side
air vents. You can only close the side air
vents by fully closing the adjuster on the
side air vents (Y page 136). Setting the airflow
Air-conditioning system X
Turn the key to position 2in the ignition
lock (Y page 141).
X To increase/reduce: turn controlC
clockwise or anti-clockwise (Y page 127).
THERMOTRONIC automatic climate
control X
Turn the key to position 2in the ignition
lock (Y page 141).
X To increase/reduce: press theKor
I button. Switching the ZONE function on/off
This function is only available with
THERMOTRONIC automatic climate control.
X To switch on: press theábutton.
The indicator lamp in the ábutton lights
up. The temperature setting for the driver's 132
Operating the climate control systemClimate control

side is not adopted for the front-passenger
side.
X To switch off: press theábutton.
The indicator lamp in the ábutton goes
out. The temperature setting for the driv-
er's side is adopted for the front-passenger
side. Demisting the windscreen
General notes You can use this function to defrost the wind-
screen or to demist the inside of the wind-
screen and the side windows.
Switch off the "Windscreen demisting" func-
tion as soon as the windscreen is clear again.
Switching the "Demisting windscreen"
on/off X
Turn the key to position 2in the ignition
lock (Y page 141).
X To activate: press the¬button.
The indicator lamp in the ¬button lights
up.
The climate control system switches to the
following functions:
R high airflow
R high temperature
R air distribution to the windscreen and
front side windows
R air-recirculation mode off
X To deactivate: press the¬button.
The indicator lamp in the ¬button goes
out. The previous settings are reactivated.
Air-recirculation mode remains deactiva-
ted.
or
X THERMOTRONIC automatic climate con-
trol: press the Ãbutton.
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode. Demisting the windows
Windows misted up on the inside X
Activate the ¿/Ácooling with air
dehumidification function.
X THERMOTRONIC automatic air condition-
ing: activate the Ãmode button.
X If the windows continue to mist up, activate
the ¬ "Windscreen demisting" function.
i You should only select this setting until
the windscreen is clear again.
Windows misted up on the outside X
Activate the windscreen wipers.
X Air conditioning: press the PorO
button.
X Automatic air conditioning
THERMOTRONIC: press the _button
until the PorO symbol appears in
the display.
i You should only select this setting until
the windscreen is clear again. Rear window heating
General notes The rear window heating has a high current
draw. You should therefore switch it off as
soon as the window is clear. It otherwise
switches off automatically after several
minutes.
If the battery voltage is too low, the rear win-
dow heating may switch off.
Activating/deactivating X
Turn the key to position 2in the ignition
lock (Y page 141).
X Press button ¤.
The indicator lamp in the ¤button lights
up or goes out. Operating the climate control system
133Climate control

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

ECO symbol appears in the multifunction
display.
In vehicles with a colour multifunction dis-
play, the èECO symbol appears in yel-
low in the multifunction display after the
fourth automatic engine start. When the
è ECO symbol is shown in green in the
multifunction display, automatic engine
switch-off is again possible.
i AMG vehicles:
the number of consecu-
tive automatic engine stops is unlimited.
i The HOLD function can be activated if the
engine has been switched off automati-
cally. It is then not necessary to continue
applying the brakes during the automatic
stop phase. When you depress the accel-
erator pedal, the engine starts automati-
cally and the braking effect of the HOLD
function is deactivated.
Vehicles with manual transmission The ECO start/stop function switches off the
engine automatically at low speeds.
X Brake the vehicle.
X Engage neutral N(follow gearshift instruc-
tion :to engage neutral N, if necessary).
X Release the clutch pedal.
The engine is switched off automatically.
Vehicles with automatic transmission
If the vehicle is braked to a standstill in Dor N,
the ECO start/stop function switches off the engine automatically. Automatic engine start Operation
The engine is started automatically if:
R
you deactivate the ECO start/stop function
by pressing the ECO button
R you engage reverse gear R
R you switch to drive program Sor M(AMG
vehicles)
R you unfasten your seat belt or open the
driver's door
R the vehicle starts to roll
R the brake system requires this
R the temperature in the vehicle interior devi-
ates from the set range
R the system detects moisture on the wind-
screen when the air-conditioning system is
switched on
R the battery's charge status is too low
Vehicles with manual transmission
! Only engage gear when the clutch pedal is
depressed.
The engine is started automatically if you:
R depress the clutch pedal fully
R depress the accelerator pedal
Vehicles with automatic transmission
The engine is started automatically if you: R release the brake pedal in transmission
position Dor Nwhen the HOLD function is
not active
R depress the accelerator pedal
R move the transmission out of position P
i Shifting the transmission to position
P
does not start the engine. Driving
147Driving an d parking Z

accelerator. The vehicle can coast with-
out use of the brakes.
- the bar empties: frequent braking
i An economical driving style involves driv-
ing at a moderate engine speed.
To achieve a higher value in the categories
Acceleration
Acceleration andConstant Constant:
R observe the gearshift recommendation
R drive the vehicle in drive program E(vehi-
cles with automatic transmission)
i On long journeys at a constant speed, e.g.
on the motorway, only the bar for Constant
Constant
will change.
i The ECO display summarises the driving
characteristics from the start of the journey to its completion. Therefore, there are
dynamic changes in the bars at the start of
a journey. During a prolonged driving time, these changes are smaller. For more
dynamic changes, perform a manual reset.
Further information on the ECO display
(Y page 204). 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.
This increases the risk of skidding and having
an accident.
Do not shift down for additional engine brak-
ing on a slippery road surface.
Downhill gradients Change into a lower gear in good time on long
and steep downhill gradients. Take particular note of this when driving a laden vehicle.
i This also applies if you have activated
cruise control, SPEEDTRONIC or DIS-
TRONIC. This will use the braking effect of the engine,
so less braking will be required to maintain
vehicle speed. This relieves the load on the
brake system and prevents the brakes from
overheating and wearing too quickly.
Heavy and light loads G
WARNING
The braking system can overheat if you leave your foot on the brake pedal while driving.
This increases the braking distance and could
even cause the braking system to fail. There is
a risk of an accident.
Never use the brake pedal as a footrest. Do
not simultaneously depress both the brake
pedal and the accelerator pedal while driving.
! 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, but
drive on for a short while. This allows the air- flow to cool the brakes more quickly.
If the brakes have been used only moderately,
you should occasionally test their effective-
ness. To do this, brake more firmly from a
higher speed. This improves the grip of the
brakes.
Wet road surfaces 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 firsttime. This may also occur after a car wash or
after driving through deep water.
You will have to depress the brake pedal more firmly. Maintain a greater distance to the vehi-
cle in front.
After driving on a wet road or having the vehi-
cle washed, brake firmly while paying atten-
tion to the traffic conditions. This will warm up the brake discs, thereby drying them more
quickly and protecting them against corro-
sion. 166
Driving tipsDriving and parking

Driving on flooded roads
!
Bear in mind that vehicles travelling in
front or in the opposite direction create
waves. This may cause the maximum per-
missible water depth to be exceeded.
These notes must be observed under all
circumstances. You could otherwise dam-
age the engine, the electronics or the trans- mission.
If you must drive on stretches of road on
which water has collected, please bear in
mind that:
R the maximum permissible fording depth in
still water is 12 cm
R you should drive no faster than walking
pace Winter driving
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.
This increases the risk of skidding and having
an accident.
Do not shift down for additional engine brak-
ing on a slippery road surface. G
DANGER
If the exhaust pipe is blocked or adequate
ventilation is not possible, poisonous gases
such as carbon monoxide (CO) may enter the vehicle. This is the case, e.g. if the vehicle
becomes trapped in snow. There is a risk of
fatal injury.
If you leave the engine or the auxiliary heating
running, make sure the exhaust pipe and area
around the vehicle are clear of snow. To
ensure an adequate supply of fresh air, open a window on the side of the vehicle that is not
facing into the wind.
Have your vehicle winterproofed at a qualified specialist workshop at the onset of winter. You should drive particularly carefully on slip-
pery road surfaces. Avoid sudden accelera-
tion, steering and braking manoeuvres. Do
not use cruise control.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
X Vehicles with manual transmission:
shift to neutral.
X Vehicles with automatic transmission:
shift the transmission to position N.
X Try to bring the vehicle under control by
using corrective steering.
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Changes in the outside temperature are dis-
played after a short delay.
Indicated temperatures just above the freez-
ing point do not guarantee that the road sur-
face is free of ice. The road may still be icy,
especially in wooded areas or on bridges. The
vehicle could skid if you fail to adapt your
driving style. Always adapt your driving style
and drive at a speed to suit the prevailing
weather conditions.
You should pay special attention to road con- ditions when temperatures are around the
freezing point.
Further information on driving with snow
chains, see (Y page 317).
For more information on driving with summer tyres, see (Y page 316).
Observe the notes in the "Winter operation"
section (Y page 316). Driving systems
Cruise control
General notes Cruise control maintains a constant road
speed for you. It brakes automatically in order
to avoid exceeding the set speed. On long and
steep downhill gradients, especially if the
vehicle is laden, you must select a lower gear 168
Driving syste
msDriving and parking