2014 MERCEDES-BENZ CLA light

Problems with the "Cooling with air dehumidification" function
ProblemPossible causes/consequences and
Solutions
The indicator lamp in
thebutton
flashes three times or
remains off. The
"Cooling with air
dehumidification"
function cannot be
switched on.
Cooling with air dehumidification has been deactivated due to a
malfunction.
XVisit a qualified specialist workshop.
Setting climate control to automatic
Points to observe before use
The automatic function is only available in
conjunction with dual-zone automatic climate
control.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the
temperature 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 necessary, cooling
with air dehumidification can be deactivated.
If you deactivate the "Cooling with air-
dehumidification" function, the air inside the
vehicle will not be cooled. The air inside the
vehicle will also not be dehumidified. The
windows can fog up more quickly. Therefore,
only deactivate the "Cooling with air-
dehumidification" function briefly.
Setting climate control to automatic
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XSet the desired temperature.
XTo activate:press thebutton.
The indicator lamp in thebutton lights
up. Automatic air distribution and airflow
are activated.
XTo switch to manual mode:press the
orbutton.
or
XPress theorbutton.
The indicator lamp in thebutton goes
out. Automatic air distribution and airflow
are deactivated.
Setting the temperature
Automatic climate control
You can set the temperature for the entire
vehicle.
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XTo increase/reduce:turn control
clockwise or counter-clockwise
(Ypage 121). Only change the temperature
setting in small increments. Start at 72 ‡
(22 †).
Dual-zone automatic climate control
Different temperatures can be set for the
driver's and front-passenger sides.
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XTo increase/reduce:turn controlor
clockwise or counter-clockwise
(Ypage 123). Only change the temperature
Operating the climate control systems127
Climate control

setting in small increments. Start at 72 ‡
(22 †).
Setting the air distribution
Automatic climate control
Air distribution settings
Directs air through the defroster vents
Directs air through the center and side
air vents
Directs air through the footwell air
vents
iYou can also activate several air
distribution settings simultaneously. To do
this, press multiple air distribution buttons.
The air is then directed through various
vents.
Setting the air distribution
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XPress one or more of the,,
buttons.
The corresponding indicator lamp lights up
briefly.
Dual-zone automatic climate control
Air distribution settings
Directs air through the defroster vents
Directs air through the center and side
air vents
Directs air through the footwell air
vents
Directs air through the defroster,
center and side air vents
Directs air through the defroster and
footwell vents
iRegardless of the air distribution setting,
airflow is always directed through the side
air vents. The side air vents can only be
closed if the adjusters are turned clockwise
until they engage.
Setting the air distribution
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XPress theorbutton repeatedly
until the desired symbol appears in the
display.
Setting the airflow
Automatic climate control
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XTo increase/reduce:turn control
clockwise or counter-clockwise
(Ypage 121).
Dual-zone automatic climate control
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XTo increase/reduce:press theor
button.
Switching the ZONE function on/off
This function is only available with dual-zone
automatic climate control.
XTo activate:press thebutton.
The indicator lamp in thebutton lights
up.
The temperature setting for the driver's
side is not adopted for the front-passenger
side.
XTo deactivate:press thebutton.
The indicator lamp in thebutton goes
out.
The temperature setting for the driver's
side is adopted for the front-passenger
side.
128Operating the climate control systems
Climate control

Defrosting the windshield
You can use this function to defrost the
windshield or to defrost theinside of the
windshield and the side windows.
iYou should only select the "Windshield
defrosting" functionuntil the windshield is
clear again.
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XTo activate:press the button.
The indicator lamp in the button lights
up.
The climate control system switches to the
following functions:
Rhigh airflow
Rhigh temperature
Rairdistribution to the windshield and
front side windows
Rair-recirculation mode off
iThe "Windshield defrosting" function
automatically sets the blower output to the
optimum defrosting effect. As a result, the
airflow may increase or decrease
automatically after the button is pressed.
iYou can adjust the blower output
manually while the "Windshield defrosting"
function is in operation:
RAutomatic climate control: turn airflow
controlclockwise or counter-
clockwise (Ypage 121).
RDual-zone automatic climate control:
press theorbutton.
XTo deactivate:press the button.
The indicator lamp in the button goes
out. The previously selected settings are
restored. Air-recirculation mode remains
deactivated.
or
XDual-zone automatic climate control: press
thebutton.
The indicator lamp in the button goes
out. Airflow and air distribution are set to
automatic mode.
or
XAutomatic climate control: turn
temperature controlclockwise or
counter-clockwise (Ypage 121).
Dual-zone automatic climate control: turn
temperature controlorclockwise or
counter-clockwise (Ypage 123).
MAX COOL maximum cooling
The MAX COOL function is only available in
vehicles for the USA.
MAX COOL is only operational when the
engine is running.
XTo activate:press the
button.
The indicator lamp in the button lights up.
XTo deactivate:press the
button
again.
The indicator lamp goes out. The previously
selected settings are restored.
When you activate MAX COOL, climate
control switches to the following functions:
Rmaximum cooling
Rmaximum airflow
Rair-recirculation mode on
Defrosting the windows
Windows fogged up on theinside
Automatic climate control
XActivate the"Cooling with air
dehumidification" function.
XIf the windows continue to fog up, activate
the "Windshield defrosting" function.
iYou should only select this setting until
the windshield is clear again.
Operating the climate control systems129
Climate control

Dual-zone automatic climate control
XActivate the"Cooling with air
dehumidification" function.
XActivate automatic mode.
XIf the windows continue to fog up, activate
the "Windshield defrosting" function.
iYou should only select this setting until
the windshield is clear again.
Windows fogged up on the outside
XActivate the windshield wipers.
XSetthe air distribution toor.
iYou should only select this setting until
the windshield is clear again.
Rear window defroster
Activating/deactivating
The rear window defroster has a high current
draw. You should therefore switch it off as
soon as the rear window is clear. Otherwise,
the rear window defroster switches off
automatically after several minutes.
If the battery voltage is too low, the rear
window defroster may switch off.
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XPress thebutton.
The indicator lamp in thebutton lights
up or goes out.
130Operating the climate control systems
Climate control

Problems with the rear window defroster
ProblemPossible causes/consequences and
Solutions
The rear window
defroster has
deactivated
prematurely or cannot
be activated.
The battery has not been sufficiently charged.
XSwitch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again.
Activating/deactivating air-
recirculation mode
Points to observe before use
You can deactivate the flow of fresh air if
unpleasant odors are enteringthe vehicle
from outside. The air already inside the
vehicle will then be recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in
particular at low temperatures. Only use air-
recirculation mode briefly to prevent the
windows from fogging up.
The operation of air-recirculation mode is the
same for all control panels.
Activating/deactivating
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XTo activate:press thebutton.
The indicator lamp in thebutton lights
up.
iAir-recirculation mode is activated
automatically at high outside
temperatures. When air-recirculation mode
is activated automatically, the indicator
lamp in thebutton is not lit.
Outside air is added after about
30 minutes.
XTo deactivate:press thebutton.
The indicator lamp in thebutton goes
out.
iAir-recirculation mode deactivates
automatically:
Rafter approximately five minutes at
outside temperatures below
approximately 41 ‡ (5 †)
Rafter approximately five minutes if the
"Cooling with air dehumidification"
function is deactivated
Rafter approximately 30 minutes at
outside temperatures above
approximately 41‡(5†) if the "Cooling
with air dehumidification" function is
activated
Activating/deactivating the residual
heat function
The residual heat function is only available in
vehicles for Canada with automatic climate
control.
It is possible to make use of the residual heat
of the engine to continue heating the vehicle
for approximately 30 minutes after the engine
has been switched off. The heating time
depends on the temperature that has been
set.
iThe blower will run at a low speed
regardless of the airflow setting.
iIf you activate the residual heat function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.
Operating the climate control systems131
Climate control

XTurn the SmartKey to position0in the
ignition lock or remove it (Ypage 137).
XTo activate:press thebutton.
The indicator lamp in thebutton lights
up.
XTo deactivate:press thebutton.
The indicator lamp in thebutton goes
out.
iResidual heat is deactivated
automatically:
Rafter approximately 30 minutes
Rwhen the ignition is switched on
Rif the battery voltage drops
Setting the air vents
Important safety notes
GWARNING
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
outlets. If necessary, redirect the airflow to
another area of the vehicle interior.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
Rkeep the air inlet between the windshield
and the hood free of blockages, such as ice,
snow or leaves.
Rnever cover the air vents or air intake grilles
in the vehicle interior.
iYou can move the adjusters for the air
vents vertically or horizontally to set the
direction of the airflow.
iFor optimal climate control in the vehicle,
open the air vents completely and set the
adjusters to the central position.
Setting the center air vents
XTo open the center air vent:turn the
adjuster in one of center air vents
counter-clockwise.
XTo close the center air vent:turn the
adjuster in one of center air vents
clockwise until it engages.
Setting the side air vents
Side window defroster vent
Side air vent
XTo openaside air vent:turn the adjuster
in side air ventcounter-clockwise.
XTo closeaside air vent:turn the adjuster
in side air ventclockwise until it
engages.
132Setting the air vents
Climate control

automatic engine switch-off is again
possible.
Vehicles with automatic transmission
If the vehicle is braked to a standstill inDor
N, the ECO start/stop function switches off
the engine automatically.
iThe HOLD function can be activated if the
engine has been switched off
automatically. It is then not necessary to
continue applying the brakes during the
automatic stop phase.When you depress
the accelerator pedal, the engine starts
automatically and the braking effect of the
HOLD function is deactivated.
Automatic engine start
General notes
The engine starts automatically if:
Ryou switch off the ECO start/stop function
by pressing the ECO button.
Ryou engage reverse gearR.
Rthe vehicle starts to roll.
Rthe brake system requires this.
Rthe temperature in the vehicle interior
deviates from the set range.
Rthe system detects moisture on the
windshield when the air-conditioning
system is switched on.
Rthe condition of charge of the battery is too
low.
Rthe driver's seat belt is removed or the
driver's door is opened.
Vehicles with automatic transmission
The engine is started automatically if you:
Rrelease the brake pedal when HOLD is not
activated and the transmission is in
positionDorN.
Rdepress the accelerator pedal.
Rmove the transmission out of positionP.
iShifting the transmission to positionP
does not start the engine.
iIf you shift the transmission fromRtoD,
the ECO start/stop function is available
again once the\rsymbol reappears in
green in the multifunction display.
Deactivating/activating the ECO start/
stop function
ECO button
XTo switch off:press button.
Indicator lampand the\rsymbol in
the multifunction display go out.
XTo switch on:press button.
Indicator lamplights up.
If all conditions for automatic engine
switch-off (Ypage 139) are fulfilled, the
\rsymbol is shown in green in the
multifunction display.
If not all conditions for automatic engine
switch-off (Ypage 139) are fulfilled, the
\rsymbol is shown in yellow in the
multifunction display. If this is the case, the
ECO start/stop function is not available.
iIf indicator lampis off, the ECO start/
stop function has been deactivated
manually or as the result of a malfunction.
The engine will then not be switched off
automatically when the vehicle stops.
140Driving
Driving and parking

ProblemPossible causes/consequences and
Solutions
The engine is not
running smoothly and
is misfiring.
There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
XOnly depress the accelerator pedal slightly.
XHave the cause rectified immediately at a qualified specialist
workshop.
Otherwise, non-combusted fuel may get into the catalytic
converter and damage it.
The coolant
temperature display is
showing more than
248 ‡ (120 †). The
coolant warning lamp
may also be lit 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.
XStop as soon as possible and allow the engine and the coolant
to cool down.
XCheck the coolant level (Ypage 283). Observe the warning
notes as you do so and add coolant if necessary.
Automatic transmission
Important safety notes
GWARNING
If the engine speed is above the idling speed
and you engage transmission positionDor
R, the vehicle could pull away suddenly. There
is a risk of an accident.
When engaging transmission positionDorR,
always firmly depress the brake pedal and do
not simultaneously accelerate.
GWARNING
The automatic transmission switches to
neutral positionNwhen 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 positionP. Prevent the parked
vehicle from rolling away by applying the
parking brake.
DIRECTSELECT lever
Overview of transmission positions
All vehicles (exceptAMG vehicles):the
DIRECT SELECT lever is on the right of the
steering column.
For information on the selector lever in AMG
vehicles (Ypage 144).
Park position with parking lock
Reverse gear
Neutral
Drive
iThe DIRECT SELECT leveralways returns
to its original position. The current
transmission positionP,R,NorDappears
142Automatic transmission
Driving and parking