2014 MERCEDES-BENZ C-CLASS SALOON window

Problems with the rear window heating
Problem
Possible causes/consequences and
M
MSolutions The rear window heat-
ing has switched off
prematurely or cannot
be activated. The battery has not been sufficiently charged.
X Switch 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 heat-
ing can be activated again. Activating/deactivating air-recircula-
tion mode
General notes You can also temporarily deactivate the flow
of fresh air manually if unpleasant odours are
entering the vehicle from outside. The air
already inside the vehicle will then be recir-
culated.
If you switch on air-recirculation mode, the
windows can mist up more quickly, in partic-
ular at low temperatures. Only use air-recir-
culation mode briefly to prevent the windows misting up.
Activating/deactivating X
Turn the key to position 2in the ignition
lock (Y page 181).
X To activate: press thegrocker switch
up or down.
The indicator lamp above the grocker
switch lights up.
Air-recirculation mode switches on automat-
ically:
R at high outside temperatures
R at high levels of pollution (THERMOTRONIC
automatic climate control only)
R in a tunnel (vehicles with a navigation sys-
tem only)
The indicator lamp above the grocker
switch is not lit when automatic air-recircula- tion mode is activated. Outside air is added
after about 30 minutes. X
To deactivate: press thegrocker
switch up or down.
The indicator lamp above the grocker
switch goes out.
Air-recirculation mode is deactivated auto-
matically:
R after approximately five minutes at outside
temperatures below approximately 5 †
R after approximately five minutes if cooling
with air dehumidification is deactivated
R after approximately 30 minutes at outside
temperatures above approximately 5 † if
the cooling with air dehumidification func-
tion is activated Convenience opening/closing using
the air-recirculation button G
WARNING
When the convenience closing feature is oper- ating, parts of the body could become trapped
in the closing area of the side window and the
sliding sunroof. There is a risk of injury.
Observe the complete closing procedure
when the convenience closing feature is oper-
ating. When closing make sure that no parts of the body are in the closing area. G
WARNING
During convenience opening parts of the body could be drawn in or become trapped
between the side window and window frame.
There is a risk of injury. Operating the climate control system
165Climate control
Z

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 (vehicles
with a sliding sunroof/panorama slid-
ing sunroof): press and hold the g
rocker switch up or down until the side win- dows and the sliding sunroof/panorama
sliding sunroof start to close automatically.The indicator lamp above the grocker
switch lights up. Air-recirculation mode is
activated.
X Convenience closing feature (vehicles
without a sliding sunroof/panorama
sliding sunroof): press and hold the g
rocker switch up or down until the side win- dows start to close automatically.
The indicator lamp above the grocker
switch lights up. Air-recirculation mode is
activated.
If you open the side windows or the sliding sunroof/panorama sliding sunroof man-
ually after closing them with the conveni-
ence closing feature, they will remain in this
position when opened using the conveni-
ence opening feature.
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 windows stop.
X To then open the side window, press the
W button again.
X Only vehicles with sliding sunroof/
panorama sliding sunroof: press the3
switch to open/close the sliding sun-
roof/panorama sliding sunroof.
The sliding sunroof/panorama sliding sun-
roof stops.
X To then open the sliding sunroof/pano-
rama sliding sunroof, pull back on the 3
button.
Notes on the automatic reversing feature for:
R the side windows (Y page 106)
R the sliding sunroof/panorama sliding sun-
roof (Y page 111)
X Convenience opening feature (vehicles
with a sliding sunroof/panorama slid-
ing sunroof): press and hold the g
rocker switch up or down until the side win- dows and the sliding sunroof/panorama
sliding sunroof start to open automatically.
The indicator lamp above the grocker
switch goes out. Air-recirculation mode is
deactivated.
X Convenience opening feature (vehicles
without a sliding sunroof/panorama
sliding sunroof): press and hold the g
rocker switch up or down until the side win- dows start to open automatically.
The indicator lamp above the grocker
switch goes out. Air-recirculation mode is
deactivated. Activating/deactivating the residual
heat function
General notes The residual heat function is only available
with THERMOTRONIC automatic climate con- trol and THERMATIC automatic climate con-
trol with auxiliary heating.
Once the engine is switched off, it is possible
to make use of the residual heat of the engine to continue heating or ventilating the front
compartment of the vehicle for approximately
30 minutes. The heating or ventilation time
depends on the set interior temperature. 166
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

Adjusting the centre air vents
X
To open/close: turn thumbwheel ?,A
or B to the left or right as far as it will go.
X To adjust the air direction: hold centre air
vent :,;or= by thumbwheel ?,Aor
B and move it up or down or to the left or
right. Adjusting the side air vents
:
Side window demister vent
; Side air vent, left
= Thumbwheel for left side air vent
X To open/close: turn thumbwheel =to the
left or right as far as it will go.
X To adjust the air direction: hold side air
vent ;by thumbwheel =and move it up
or down or to the left or right. Setting the rear-compartment air
vents
Rear air vents are not available in all vehicles. Vehicles with THERMATIC automatic climate con-
trol
Vehicles with THERMOTRONIC automatic climate
control
: Rear-compartment air vent, left
; Rear-compartment air vent, right
= Rear-compartment air vent thumbwheel
? Rear control panel
X To open/close: turn thumbwheel =to the
left or right as far as it will go.
X To adjust the air direction: hold rear air
vent :or; by the middle fin and move up
or down or to the left or right. 178
Adjusting the air ventsClimate cont
rol

Shifting to neutral N
X
Depress the clutch pedal fully.
X Move the gear lever to position N:. Engaging reverse gear
! Only shift into reverse gear
Rwhen the
vehicle is stationary. Otherwise, you could
damage the transmission.
X Move the gear lever firmly to the left,
beyond the point of resistance, then for-
wards.
The ECO start/stop function is not available
when reverse gear is engaged. For further
information on the ECO start/stop function;
see (Y page 186). Gearshift recommendation
The gearshift recommendations assist you in
adopting an economical driving style. The rec- ommended gear is shown in the multifunction
display.
X Shift gear according to gearshift recom-
mendation :when shown in the multi-
function display of the instrument cluster. C 180 BlueEFFICIENCY Edition:
in drive
program Ethe accelerator pedal also trans-
mits double pulses. Additional information
for drive programs (Y page 192). AGILITY SELECT switch
Use the AGILITY SELECT switch to change the drive program. Depending on the drive pro-
gram selected, the following vehicle charac-
teristics will change:
R the drive (engine and transmission man-
agement)
R the suspension
R the steering
R the availability of the ECO start/stop func-
tion (Y page 186)
R the climate control settings
- THERMATIC (Y page 153)
- THERMOTRONIC (Y page 156)
R the rear window heating operation period
(Y page 164)
R the performance of the seat heating
(Y page 123)
If the ignition is switched off for less than four hours, the previously selected drive program
is activated when the engine is next started. If
the ignition is switched off for more than four hours, drive program Cis activated when the
engine is next started. Manual transmission
191Driving and parking Z

This also applies if cruise control,
DISTRONIC PLUS or SPEEDTRONIC are
activated.
AGILITY SELECT switch
Use the AGILITY SELECT switch to change the drive program. Depending on the drive pro-
gram selected, the following vehicle charac-
teristics will change:
R the drive (engine and transmission man-
agement)
R the suspension
R the steering
R the availability of the ECO start/stop func-
tion (Y page 186)
R the climate control settings
- THERMATIC (Y page 153)
- THERMOTRONIC (Y page 156)
R the rear window heating operation period
(Y page 164)
R the performance of the seat heating
(Y page 123)
If the ignition is switched off for less than four hours, the previously selected drive program
is activated when the engine is next started. If
the ignition is switched off for more than four hours, drive program Cis activated when the
engine is next started. 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 197).
Using the steering wheel gearshift paddles,
you can temporarily change gear yourself.
Further information on the manual drive pro-
gram (Y page 198). 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
To permanently select the gears in the drive
program Iusing the steering wheel paddles,
select the permanent manual gearshift pro-
gram.
Information about the selection of drive pro-
gram Iwith COMAND Online or Audio 20 can
be found in the Digital Owner's Manual. Automatic transmission
197Driving and parking Z

R
avoid sudden steering movements
R brake carefully
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 water level, in the case of still water,
may not exceed a maximum point of the
lower edge of the vehicle body
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 or DISTRONIC PLUS.
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 (Y page 431).
Further information on driving with summer
tyres (Y page 430).
Observe the notes in the "Winter operation"
section (Y page 430). Driving tips
215Driving and parking Z