2014 MERCEDES-BENZ CLA heating

!Activates/deactivates air-recirculation mode (Ypage 131)
Sets the airflow (Ypage 128)
Switches cooling with airdehumidification on/off (Ypage 125)
Switches the rear window defroster on/off (Ypage 130)
Notes on using climate control
Automatic climate control
The following contains notes and
recommendations on optimum use of the
automatic climate control.
RSwitch on the air-conditioning system by
turning control knobclockwise to the
desired position (except position0).
RSet the temperature to 72 ‡ (22 †).
RRecommendation for preventing
fogged up windows with low outside
temperatures or rain:switchon for
the air distribution and switchand
off if possible (Ypage 128).
In air-recirculation mode, switchoff
(Ypage 131).
Set airflow controlto a setting between
3and6(Ypage 128).
RRecommendation for rapid cooling or
heating of the vehicle interior:briefly set
airflow controlto a setting between3
and6(Ypage 128).
RRecommendation for a constant
vehicle interior temperature:set airflow
controlto a setting between1and3
(Ypage 128).
RRecommendation for air distribution in
the winter:setand
(Ypage 128).
Recommendation for air distribution in
the summer:setorand
(Ypage 128).
ROnly use the "Windshield defrosting"
function briefly until the windshield is clear
again.
ROnly use air-recirculation mode briefly, e.g.
if there are unpleasant outside odors or
when in a tunnel. The windows could
otherwise fog up, since no fresh air is drawn
into the vehicle in air-recirculation mode.
RVehicles with COMAND:if you change the
settings of the climate control system, the
climate status display appears for three
seconds at the bottom of the screen in the
COMAND display. See also the separate
COMAND operating instructions. You will
see the currentsettings of the various
climate control functions.
ECO start/stop function
During automatic engine switch-off, the ECO
start/stop function only operates at a
reduced capacity. If you require the full
climate control output, you can switch off the
ECO start/stop function by pressing the ECO
button (Ypage 140).
122Overview of 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

Problems with the transmission
ProblemPossible causes/consequences and
Solutions
The transmission has
problems shifting gear.
The transmission is losing oil.
XHave the transmission checked at a qualified specialist
workshop immediately.
The acceleration ability
is deteriorating.
The transmission no
longer shifts into all of
the gears.
Reverse gear can no
longer be engaged.
The transmission is in emergency mode.
XStop the vehicle.
XShift the transmission to positionP.
XSwitch off the engine.
XWait at least 10 seconds before restarting the engine.
XShift the transmission to positionD.
XHave the transmission checked at a qualified specialist
workshop immediately.
Refueling
Important safety notes
GWARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is a risk of fire and
explosion.
You must avoid fire, open flames, creating
sparks and smoking. Switch off the engine
and, if applicable, the auxiliary heating before
refueling.
GWARNING
Fuel is poisonous and hazardous to health.
There is a risk of injury.
You must make sure that fuel does not come
into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following:
RWash away fuel from skin immediately
using soap and water.
RIf fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance
without delay.
RIf fuel is swallowed, seek medical
assistance without delay.Donot induce
vomiting.
RImmediately change out of clothing which
has come into contact with fuel.
GWARNING
Electrostatic buildup can create sparks and
ignite fuel vapors. There is a risk of fire and
explosion.
Always touch the vehicle body before opening
the fuel filler flap or touching the fuel pump
nozzle. Any existing electrostatic buildup is
thereby discharged.
!Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the
ignition if you accidentally refuel with the
wrong fuel. Otherwise, the fuel will enter
the fuel system. Even small amounts of the
wrong fuel could result in damage to the
fuel system and the engine. Notify a
qualified specialist workshop and have the
fuel tank and fuel lines drained completely.
Refueling151
Driving and parking
Z

Apart from driving style, consumption is
dependent on many factors such as, e.g.:
Rload
Rtire pressure
Rcold start
Rchoice of route
Relectrical consumers switched on
These factors are not taken into
considerationby the ECO display.
The evaluation of your driving style is carried
out using the following three categories:
RAcceleration(evaluation of all
acceleration processes):
-The bar fills up: moderate acceleration,
especially at higher speeds
-The bar empties: sporty acceleration
RConstant(assessmentofdriving behavior
at all times):
-The bar fills up: constant speed and
avoidance of unnecessary acceleration
and deceleration
-The bar empties: fluctuations in speed
RCoasting(assessment of all deceleration
processes):
-The bar fills up: anticipatory driving,
keeping yourdistance and early release
of the accelerator. The vehicle can coast
without use of the brakes.
-The bar empties: frequent braking
iAn economical driving style specially
requires driving at moderate engine
speeds.
To achieve a higher value in the categories
AccelerationandConstant:
Robserve the gearshift recommendations.
Rdrive in drive programE.
iOn long journeys at a constant speed, e.g.
on the highway, only the bar forConstant
will change.
iThe ECO display summaries the driving
characteristics fromthe start of the journey
to its completion. For this reason, the bars
change dynamically at the beginning of the
journey. On longer journeys, there are
fewer changes. For more dynamic changes,
carry out a manual reset.
Further information on the ECO display
(Ypage 198).
Braking
Important safety notes
GWARNING
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
braking 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.For this, you need to have selected
manual drive programM.This helps you to
avoid overheating the brakes and wearing
them out excessively.
When you take advantage of the engine's
braking effect, 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-Benzwarranty.
iBriefly depressing the acceleratorpedal
on downhill gradients while the manual
drive programMis temporarily activated:
the automatic transmission may switch to
the last active automatic drive programE
orS.The automatic transmission may shift
to a higher gear. This can reduce the
engine's braking effect.
158Driving tips
Driving and parking

XHold test gaugevertically on brake
discand slide measuring pinonto
brake disc.
XCheck which colorfield!the arrow on
measuring pinis pointing to.
Green:the brake pad/lining thickness is
sufficient.
Red:the brake pad/lining thickness is not
sufficient. Have the brake pads/lining
checked at a qualified specialist workshop.
iTo avoid an inaccurate measurement:
Rmake sure you position the wheels
suitably
Rdo not put the measuring pin on a recess
in the brake disc
Driving on wet roads
Hydroplaning
If water has accumulated to a certain depth
on the road surface, there is a danger of
hydroplaning occurring, even if:
Ryou drive at low speeds.
Rthe tires have adequate tread depth.
For this reason, in the event of heavy rain or
in conditions in which hydroplaning may
occur, you must drive in the following
manner:
Rlower your speed.
Ravoid ruts.
Rbrake carefully.
Driving on flooded roads
!Do not drive through flooded areas.
Check the depth of any water before driving
through it. Drive slowly through standing
water. Otherwise, water may enter the
vehicle interior or the engine compartment.
This can damage the electronic
components in the engine or the automatic
transmission. Water can also be drawn in
by the engine's air suction nozzles and this
can cause engine damage.
Winter driving
General notes
GWARNING
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
braking on a slippery road surface.
GDANGER
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.
Observe the notes in the "Winter operation"
section (Ypage 314).
Driving with summer tires
Observe the notes in the "Winter operation"
section (Ypage 314).
Slippery road surfaces
GWARNING
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
braking on a slippery road surface.
Driving tips161
Driving and parking
Z

If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
XShift the transmission to positionN.
Drive particularly carefully on slippery road
surfaces.Avoid sudden acceleration, steering
and braking maneuvers. Do not use the cruise
control or DISTRONIC PLUS.
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
displayed after a short delay.
Indicated temperatures just above the
freezing point do not guarantee that the road
surface is free of ice. The road may still be icy,
especially in wooded areas or on bridges. You
should pay special attention to road
conditions when temperatures are around
freezing point.
iFor more information on driving with
snow chains, see (Ypage 315).
Driving systems
Cruise control
General notes
Cruise control maintains a constant road
speed for you.Itbrakes 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 low gearin
good time. For this, you will need to have
selected manual drive program
M(Ypage 148). 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
wearing too quickly.
Use cruise control only if road and traffic
conditions make it appropriate to maintain a
steady speed for a prolonged period. You can
store any road speed above 20 mph
(30 km/h).
Important safety notes
If you fail to adapt your driving style, cruise
control can neither reduce the risk of an
accident nor override the laws of physics.
Cruise control cannot take into account the
road, traffic and weather conditions. Cruise
control 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
staying in your lane.
Do not use cruise control:
Rin road and traffic conditions which do not
allow you to maintain a constant speed e.g.
in heavy traffic or on winding roads
Ron slippery road surfaces. Braking or
accelerating could cause the drive wheels
to lose traction and the vehicle could then
skid
Rwhen there is poor visibility, e.g. due to fog,
heavy rain or snow
If there is a change of drivers, advise the new
driver of the speed stored.
Cruise control lever
To activate or increase speed
To activate or reduce speed
"To deactivate cruise control
!To activate at the current speed/last
stored speed
When you activate cruise control, the stored
speed is shown in the multifunction display
for five seconds.
162Driving systems
Driving and parking

Deactivating cruise control
There are several ways to deactivate cruise
control:
XBriefly press the cruise control lever
forwards".
or
XBrake.
Cruise control is automatically deactivated if:
Rthe vehicle is secured with the electric
parking brake
Ryou are driving at less than 20 mph
(30 km/h)
RESP®intervenes or you deactivate ESP®
Ryou shift the transmissionto positionN
while driving
If cruise control is deactivated, you will hear
a warning tone. You will see theCruise
Control Offmessage in the multifunction
display for approximately five seconds.
iWhen you switch off the engine, the last
speed stored is cleared.
DISTRONIC PLUS
General notes
DISTRONIC PLUS regulates the speed and
automatically helps you maintain the
distance to the vehicle detected in front.
Vehicles are detected with the aid of the radar
sensor system. DISTRONIC PLUS 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 wearing too quickly.
If DISTRONIC PLUS detects that there is a risk
of a collision, you will be warned visually and
acoustically. DISTRONIC PLUS cannot
prevent 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.
DISTRONIC PLUS operates in range between
0 mph (0 km/h) and 120 mph (200 km/h).
Do not use DISTRONIC PLUS while driving on
roads with steep gradients.
As DISTRONIC PLUS transmits radar waves,
it can resemble the radar detectors of the
responsible authorities. You can refer to the
relevant chapter in the Operator's Manual if
questions are asked about this.
iThis device complies with RSS-210 of
Industry Canada. Operation is subject to
the following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the
device will void any warranties, and is not
permitted. Do not tamper with, alter, or use
in any non-approved way.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
Important safety notes
GWARNING
DISTRONIC PLUS does not react to:
Rpeople or animals
Rstationary obstacles on the road, e.g.
stopped or parked vehicles
Roncoming and crossingtraffic
As a result, DISTRONIC PLUS may neither give
warnings nor intervene in such situations.
There is a risk of an accident.
Always pay careful attention to the traffic
situation and be ready to brake.
164Driving systems
Driving and parking

Vanity mirror in the sun visor
Mirror lightonly functions if the sun visor
is clipped into bracketand mirror cover
has been folded up.
Glare from the side
XFold down sunvisor.
XPull sun visorout of retainer.
XSwing sun visorto the side.
XVehicles with mirror lights:slide sun
visorhorizontally as desired.
Ashtray
Front ashtray
!The stowage space under the ashtray is
not heat resistant. Before placing lit
cigarettes in the ashtray, make sure that
the ashtray is properly engaged. Otherwise,
the stowage space could be damaged.
Example: vehicles with a cover over the stowagecompartment
XTo open:push the lower section of
cover.
The stowage compartmentopens.
XTo remove the insert:lift insert"
upand out.
XTo re-install the insert:press insert"
into the holder until it engages.
iIf you remove the ashtray insert, you can
use the resulting compartment for
stowage.
Rear-compartment ashtray
XTo open:pull cover"out by its top edge.
XTo remove:pull insertby recessin
the direction of arrow!until it audibly
releases.
XLift insertup and out.
XTo install the insert:place insertfrom
above into the holder and press down until
it engages.
Cigarette lighter
GWARNING
You can burn yourself if you touch the hot
heating element or the socket of the cigarette
lighter.
In addition, flammable materials can ignite if:
Rthe hot cigarette lighter falls
Ra child holds the hot cigarette lighter to
objects, for example
262Features
Stowage and features