2014 MERCEDES-BENZ C-CLASS SALOON air condition

X
To activate pre-entry climate control:
unlock the vehicle with the key or KEYLESS-
GO.
The air-conditioning functions are activatedfor up to 120 seconds for preheating and
for up to 60 seconds for pre-cooling.
The pre-entry climate control switches off
automatically when the engine is started.
Seat heating (heating), seat ventilation (ven-
tilation), perfume atomiser and ionisation
remain switched on after starting the engine. 170
Operating the climate control systemClimate control

Problems with the pre-entry climate control
Problem
Possible causes/consequences and
M
MSolutions The pre-entry climate
control cannot be
switched on or has
switched itself off. The charge status of the high-voltage battery is under the specified
minimum charge status.
X Start the engine when the vehicle is at a standstill.
The internal combustion engine drives the electric motor. The
electric motor is operating as an alternator. The high-voltage
battery is charging.
Further information on charging the high-voltage battery
(Y page 416). The pre-entry climate control was started more than twice when
the engine was switched off.
X Switch on the engine and let it run for more than ten seconds.
X Try again to switch the pre-entry climate control on. The difference between the interior temperature and the desired
temperature is too small.
X Increase the difference between the interior temperature and
the desired temperature. Remote activation of heating and ven-
tilation system
General notes Remote activation is only available on vehi-
cles with the BlueEFFICIENCY package.
The driver's and front-passenger seat areas
can also be heated or ventilated when the
engine is switched off.
The starter battery must be sufficiently
charged before remote activation can be
switched on.
When the vehicle is heated, the following
functions are activated:
R seat heating
R rear window heating
R exterior mirror heating
When the vehicle is ventilated, the following
functions are activated:
R blower
R seat ventilation If you have activated ionisation using Audio
20/COMAND Online (see separate operating
instructions), it is activated together with the
remote activation function.
Activating/deactivating the remote
activation function X
To switch on remote activation: push the
climate control symbol button on the key.
The air-conditioning functions are switched on, for up to 10 minutes for heating and up
to 120 minutes for ventilation.
Remote activation switches off automatically if:
R the ignition is switched on, or
R the engine is started
Seat heating (heating), seat ventilation (ven-
tilation) and ionisation remain switched on
after starting the engine. Operating the climate control system
171Climate control Z

Problems with remote activation
Problem
Possible causes/consequences and
M
MSolutions Remote activation can-
not be switched on or
has switched itself off. Remote activation was started more than three times when the
engine was switched off.
X Switch on the engine and let it run for more than ten seconds.
X Try again to switch remote activation on. The starter battery is not sufficiently charged.
X Charge the starter battery.
X Try again to switch remote activation on. Auxiliary heating
Important safety notes G
DANGER
If the exhaust pipe is blocked or sufficient
ventilation is not possible, toxic exhaust
fumes can enter the vehicle, especially car-
bon monoxide. This is the case, e.g. in
enclosed spaces, or if the vehicle is stuck in
snow. There is a risk of fatal injuries.
You should switch off the auxiliary heating in
enclosed spaces which do not have an extrac- tion system, e.g. a garage. If the vehicle is
stuck in snow and you must leave the auxiliary
heating running, keep the exhaust pipe and
the area around the vehicle clear of snow. To guarantee a sufficient supply of fresh air, open
a window on the side of the vehicle away from the wind. G
WARNING
When the auxiliary heating is switched on,
parts of the vehicle can become very hot.
Flammable materials such as leaves, grass or twigs may ignite if they come into contact
with:
R hot parts of the exhaust system
R the exhaust gas itself
There is a risk of fire. When the auxiliary heating is switched on,
make sure that:
R no flammable materials come into contact
with hot vehicle components
R the exhaust gas can escape from the
exhaust pipe unhindered
R the exhaust gas does not come into contact
with flammable materials.
The auxiliary heating is fitted under the front
wing on the right-hand side of the vehicle. The emissions outlet is found behind the front
wheel on the right hand side of the vehicle.
! Operating the auxiliary heating/ventila-
tion draws on the vehicle battery. After you
have heated or ventilated the vehicle a
maximum of two times, drive for a longer
distance.
Switch the auxiliary heating on regularly once a month for about ten minutes.
The auxiliary heating heats the air in the vehi-
cle interior to the set temperature. This
occurs without using the heat of the running
engine. The auxiliary heating is operated
directly using the vehicle's fuel. For this rea-
son, the tank content must be at least at
reserve fuel level to ensure that the auxiliary
heating functions.
The auxiliary heating/ventilation automati-
cally adjusts to changes in temperature and
weather conditions. For this reason, the aux- 172
Operating the climate control systemClimate control

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.
General notes :
ECO start/stop display
If the è ECO symbol is shown in green in
the multifunction display, the ECO start/stop
function switches the engine off automati-
cally once the vehicle stops moving.
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 187) or a malfunc-
tion has caused the system to be deactivated,
the è ECO symbol is not displayed. Automatic engine switch-off General notes
The ECO start/stop function is operational
and the
èECO symbol is shown in green in
the multifunction display, if:
R the indicator lamp in the ECO button lights
up 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 no electrical connection is established
between the vehicle and the trailer or
another carrier system (e.g. bicycle rack)
R the driver's door is closed and the driver's
seat belt is fastened
If the conditions for automatic engine switch- off are not all fulfilled, the èECO symbol is
shown in yellow.
All of the vehicle's systems remain active
when the engine is switched off automati-
cally.
Vehicles with manual transmission 186
DrivingDriving and parking

The ECO start/stop function switches off the
engine automatically at low speeds.
X Brake the vehicle.
X Shift to neutral N(follow gearshift instruc-
tion :to shift into 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.
The 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 is started automatically if:
R
you switch off the ECO start/stop function
by pressing the ECO button
R you depress the accelerator pedal
R you engage reverse gear R
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 when you depress the clutch pedal. Vehicles with automatic transmission
The engine is started automatically if:
R you switch to drive program S+
R in transmission position Dor N, the brake
pedal is released and the HOLD function is not active
R you shift from transmission position P
Shifting the transmission to position Pdoes
not start the engine.
If you shift the transmission from Rto D, the
ECO start/stop function is available again
once the èECO symbol reappears in
green in the multifunction display.
Switching off/on the ECO start/stop
function X
To switch off: press ECO button :.
Indicator lamp ;and the èECO sym-
bol in the multifunction display go out.
X To switch on: press ECO button :.
Indicator lamp ;lights up. If all conditions
for automatic engine switch-off
(Y page 186) are met, the èECO sym-
bol is shown in green in the multifunction
display.
If not all conditions for automatic engine
switch-off (Y page 186) are met, the è
ECO symbol is shown in yellow in the mul-
tifunction display. If this is the case, the
ECO start/stop function is not available.
If indicator lamp ;is off, the ECO start/stop
function has been deactivated manually or as the result of a malfunction. The engine will Driving
187Driving and parking Z

X
Push AGILITY SELECT switch :up or down
until the desired drive program is selected. The selected drive program appears in the
multifunction display. After five seconds
the display goes out and the status icon of
the selected drive program appears.
In addition, the current drive program set-
tings are displayed in the Audio 20/
COMAND Online display.
Available drive programs: I
Individual Individual settings
S+
Sport Plus Extremely sporty driving
characteristics
S
Sport Sporty driving character-
istics
C
Comfort Comfortable and econom-
ical driving characteristics E
Eco Particularly economical
driving characteristics
Additional information for drive programs
(Y page 192). Drive programs
Drive program I (Individual) In drive program
Ithe following properties of
the drive program can be selected:
R the drive (engine and transmission man-
agement)
R the suspension
R the steering
R C 180 BlueTEC BlueEFFICIENCY Edition:
availability of the economical accelerator
pedal
Information about the selection of drive pro-
gram Iwith COMAND Online or Audio 20 can
be found in the Digital Owner's Manual. Drive program S+ (Sport Plus) Drive program
S+is characterised by the fol-
lowing:
R the vehicle exhibits extremely sporty driv-
ing characteristics
R the suspension exhibits particularly stiff
springing and damping settings (vehicles
with AIRMATIC)
R the ECO start/stop function is not available
Drive program S (Sport) Drive program
Sis characterised by the fol-
lowing:
R the vehicle exhibits sporty driving charac-
teristics
R the suspension exhibits stiff springing and
damping settings (vehicles with AIRMATIC)
Drive program C (Comfort) Drive program
Cis characterised by the fol-
lowing:
R the vehicle delivers comfortable, economi-
cal driving characteristics.
R increased sensitivity. This improves driving
stability on slippery road surfaces, for
example.
Drive program E (Eco) Drive program
Eis characterised by the fol-
lowing:
R the vehicle exhibits comfortable, economi-
cal driving characteristics.
R increased sensitivity. This improves driving
stability on slippery road surfaces, for
example.
R the performance of the air-conditioning and
heating systems are reduced. 192
Manual transmissionDriving and parking

Drive program S+ (Sport Plus)
Drive program
S+is characterised by the fol-
lowing:
R the vehicle exhibits extremely sporty driv-
ing characteristics
R the vehicle pulls away in first gear
R the automatic transmission shifting up
later
R as a result of the later automatic transmis-
sion shift points, the fuel consumption pos-sibly being higher
R the suspension exhibits particularly stiff
springing and damping settings (vehicles
with AIRMATIC)
R the ECO start/stop function is not available
Drive program S (Sport) Drive program
Sis characterised by the fol-
lowing:
R the vehicle exhibits sporty driving charac-
teristics
R the vehicle pulls away in first gear
R the automatic transmission shifting up
later
R as a result of the later automatic transmis-
sion shift points, the fuel consumption pos-sibly being higher
R the suspension exhibits stiff springing and
damping settings (vehicles with AIRMATIC)
Drive program C (Comfort) Drive program
Cis characterised by the fol-
lowing:
R the vehicle delivers comfortable, economi-
cal driving characteristics.
R the vehicle pulling away more gently in
forward and reverse gears unless the accel- erator pedal is depressed fully.
R increased sensitivity. This improves driving
stability on slippery road surfaces, for
example.
R optimal fuel consumption resulting from
the automatic transmission shifting up sooner. The vehicle is driven in the low
engine speed range and the wheels are less
likely to spin.
Drive program E (Eco) Drive program
Eis characterised by the fol-
lowing:
R the vehicle exhibits comfortable, economi-
cal driving characteristics.
R the vehicle pulling away more gently in
forward and reverse gears unless the accel-
erator pedal is depressed fully.
R increased sensitivity. This improves driving
stability on slippery road surfaces, for
example.
R optimal fuel consumption resulting from
the automatic transmission shifting up
sooner. The vehicle is driven in the low
engine speed range and the wheels are less likely to spin.
R during deceleration, the engine is discon-
nected from the drive train. The vehicle
uses kinetic energy and consumes less fuel
(overrun mode).
R the performance of the air-conditioning and
heating systems are reduced. Manual gearshifting
General notes :
Left steering wheel gearshift paddle:
shifts down
; Right steering wheel gearshift paddle:
shifts up 198
Automatic transmissionDriving and pa
rking

time, the driver has adopted the most eco-
nomical driving style for the selected settings
and prevailing conditions. The ECO display
border lights up.
The ECO display does not indicate the actual fuel consumption. The additionally achieved
range displayed under Bonus fr. start Bonus fr. start
does not indicate a fixed consumption reduc-
tion.
In addition to driving style, the actual con-
sumption is affected by other factors, such
as:
R load
R tyre pressure
R cold start
R choice of route
R the use of electrical consumers
These factors are not included in the ECO dis-
play.
An economical driving style involves driving at a moderate engine speed.
To achieve a higher value in the categories
"acceleration" and "smooth driving":
R observe the gearshift recommendation
R drive the vehicle in drive program E(vehi-
cles with the AGILITY SELECT switch)
On long journeys at a constant speed, e.g. on the motorway, only the outer area for "con-
stant" will change.
The ECO display summarises the driving style
from the start of the journey to its completion. Therefore, there are more marked changes in
the outer areas at the start of a journey. Dur- ing a prolonged driving time, these changes
are smaller. For more marked changes, per-
form a manual rest (Y page 299).
Further information on the ECO display
(Y page 298). Brakes
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 and
when towing a trailer.
This also applies if cruise control, DISTRONIC
PLUS or SPEEDTRONIC are activated.
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 heavy demands are made on the brakes, do not park the vehicle immediately. Drive on for
a short while. This allows the airflow to cool
the brakes more quickly. Driving
tips
213Driving an d parking Z