2015 MERCEDES-BENZ C-CLASS COUPE heating

Problem
Possible causes/consequences and
M
MSolutions The engine cannot be
started using the key. The on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
X Check the starter battery and charge it if necessary (Y page 343).
or X Jump-start the vehicle (Y page 345).
or X Consult aqualified specialist workshop. The engine cannot be
started using the Start/
Stop button. The key is in
the vehicle. The vehicle is locked.
X Unlock the vehicle and try to start the vehicle again. The key battery is discharged or nearly discharged.
X Check the key battery (Y page 83) and replace if necessary
(Y page 83).
If this does not work: X Start your vehicle with the key in the ignition lock. There is interference from
apowerful source of radio waves.
X Start your vehicle with the key in the ignition lock. You have lost
akey. X
Have the key deactivated at aqualified specialist workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the emer-
gency key element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. Doors
Important safety notes
United Kingdom only: G
WARNING
When the double locks are activated, the
doors can no longer be opened from the
inside. People in the vehicle can no longer get out, e.g. in hazardous situations. There is a
risk of injury.
Therefore, do not leave any people unsuper-
vised in the vehicle, particularly children, eld-
erly people or people in need of special assis-
tance. Do not activate the double lock when
people are in the vehicle. If the vehicle has been locked from the outside,
the double lock function is activated as stand-
ard. It is then not possible to open the doors
from inside the vehicle. You can deactivate the
double lock function by deactivating the interior
motion sensor (see the separate multimedia
system operating instructions). The doors can
then be opened from the inside after the vehicle
has been locked from the outside. The anti-theft alarm system is triggered if the door is opened
from the inside. Switch off the alarm
(Y page 78).
All countries: 86
DoorsOpening and closing

G
WARNING
If the driver's seat is not correctly engaged, it coul dunexpectedly move while driving. This
coul dcausey ou to lose control of the vehicle.
There is arisk of an accident.
Always ensure that the driver's seat is
engaged before starting the vehicle. G
WARNING
You coul dlose control of the vehicl ewhile
driving if you:
R adjust the driver's seat, steering whee lor
mirrors
R fasten the seat belt
There is arisk of an accident.
Adjust the driver's seat, headr estraint, steer-
ing whee land mirrors and fasten yours eat
beltb efore starting the engine. G
WARNING
If you adjust the seat height carelessly, you or other vehicl eoccupants coul dbetrappe dand
thereby injured .Childre ninparticular could
accidentally press the electrica lseat adjust-
ment buttons and become trapped. There is a
risk of injury.
Whil emoving the seats, make sure that your
hands or other body parts do not get under the
leve rassembly of the seat adjustment sys-
tem. G
WARNING
The headr estraints cannot provid ethe inten-
ded protection unless they are fitted and
adjusted correctly. There is an increased risk of injury to the heada nd neck in the event of
an accident or sudden braking, for example.
Always drive with the headr estraints fitted.
Ensure that the centre of the headr estraints
support the back of each vehicl eoccupant's
headate ye levelbefore driving off. G
WARNING
The seat beltd oes not offer the intended level
of protection if you have not moved the back- rest to an almost vertical position. When brak-
ing or in the event of an accident, you could
slid eunderneath the seat belta nd sustain
abdomen or neck injuries, for example. This
poses an increased risk of injury or even fatal
injury.
Adjust the seat properly before beginning
yourj ourney .Always ensure that the backrest
is in an almost vertical position and that the
shoulders ection of yours eatbelt is routed
across the centre of yours houlder.
! To avoi
ddamage to the seats and the seat
heating, observe the following information:
R do not spil lany liquidsont he seats. If liquid
is spilled on the seats, dry them as soon as possible.
R if the seat covers are damp or wet, do not
switch on the seat heating. The seat heat-
ing should alson ot be used to dry the seats.
R clea nthe seat covers as recommended;
see "Interio rcare".
R do not transport heav yloads on the seats.
Do not place sharp objects on the seat
cushions, e.g. knives, nail sortools. The
seats should only be occupied by passen-
gers, if possible.
R when the seat heating is in operation, do
not cover the seats with insulating materi-
als,e .g. blankets, coats, bags, seat covers,
child seats or booster seats.
! Make sure that there are no objects in the
footwel lunder or behind the seats when mov-
ing the seats back. There is arisk that the
seats and/or the objects coul dbedamaged.
i The rear-compartment head restraints can
be removed (Y page106).
Vehicles without the through-loading feature:
the head restraints cannot be removed from
the rear-compartment seats.
For more information, contact aqualified spe-
cialist workshop.
i Related topic:
R Through-loading facility in the rear bench
seat (Y page102) Seats
103Seats, steering wheel and mirrors Z

Adjusting th
esideb olsters of th eseat cush-
ion
X To narrow: press button :.
X To broaden: press button;.
Adjusting th esideb olsters of th eseat back-
rest
X To narrow: press button =.
X To broaden: press button?. Seat heatin
gand seat ventilation
Switching th eseat heatin gon/off G
WARNING
If you repeatedly switch on seat heating ,the
seat cushion and backres tpaddin gmay
become ver yhot.T he healt hofvehicle occu-
pants wit hlimited temperatur esensitivit yora
limited abilit ytor eac ttoe xcessively high
temperatures may be affected or they may
eve nsuffer burn-like injuries .Ther eisar iskof
injury.
Therefore, do no tswitch on th eseat heating
repeatedly. The three red indicator lamps in th
ebutto nindi-
cat ethe heating leve lyou have selected.
The system automaticall yswitches down from
level 3to level 2after approximately eight
minutes.
The system automaticall yswitches from level 2
to level 1after approximately te nminutes.
The system automaticall yswitches off approx-
imately 20 minute safter it is set to level 1.
X Turn th ekeyto position 1or 2in th eignition
loc k(Ypage 145).
X To switch on: press button:repeatedly
until th edesired heating leve lisset.
X To switch off: press button:repeatedly
until all th eindicator lamps go out.
i If th
ebattery voltage is to olow, th eseat
heating may switch off.
i If driv eprogram Eis selected, th epower of
th es eat heating is reduced:
R Manual transmission (Y page 157)
R Automatic transmission (see Digital Own-
er' sM anual)
Switching th eseat ventilation on/off The three blue indicator lamps in th
ebuttons
indicat ethe ventilatio nleve lyou have selected.
X Turn th ekeyto position 1or 2in th eignition
loc k(Ypage 145).
X To switch on: press button:repeatedly
until th edesired ventilatio nleve liss et.
X To switch off: press button:repeatedly
until all th eindicator lamps go out.
i If th
ebattery voltage is to olow, th eseat
ventilatio nmay switch off.
i You can open th
eside windows and th eslid-
ing sunroo fusin gthe "Convenience opening" 108
SeatsSeats, steerin
gwheel and mirrors

Problems with the seat heating or seat ventilation
Problem
Possible causes/consequences and
M
MSolutions Seat heating or seat ven-
tilation has been
switched off prematurely
or cannot be switched
on. The on-board voltage is too low because too many electrical consum-
ers are switched on.
X Switch off electrical consumers that you do not need, such as the
rear window heating or interior lighting.
Once the battery is sufficiently charged, the seat heating or seat
ventilation can be switched back on manually. Steering wheel
Important safety notes
G
WARNING
You could lose control of the vehicle while
driving if you:
R adjust the driver's seat, steering wheel or
mirrors
R fasten the seat belt
There is arisk of an accident.
Adjust the driver's seat, head restraint ,steer-
ing wheel and mirrors and fasten your seat
belt before startingt he engine.G
WARNING
Children could become trapped by the steer-
ing wheel if they adjust it. There is arisk of
injury.
When leaving the vehicle, always take the key with you and lock the vehicle. Never leave
children unattended in the vehicle.
The electrically adjustable steering wheel can
still be adjusted when there is no key in the igni-
tion lock. Adjusting the steering wheel man-
ually
:
Release lever
; To adjust the steering wheel height
= To adjust the steering wheel position (fore-
and-aft adjustment)
X Push release lever :down completely.
The steering column is unlocked.
X Adjust the steering wheel to the desired posi-
tion.
X Push release lever :up completely.
The steering column is locked.
X Check if the steering column is locked. When
doing so, try to push the steering wheel up or
down or try to move it in the fore-and-aft
direction. 110
Steering wheelSeats, steering wheela
nd mirrors

Adjusting th
esteering wheel electri-
cally :
To adjust th esteering whee lposition (fore-
and-af tadjustment)
; To adjust th esteering whee lheight
i Further relate dsubjects:
R EASY-ENTRY/EXIT feature (Y page 112)
R Storing setting s(Ypage 116)
R Operating th eon-bo ard computer
(Y page 233). Steering wheel heating
Switchin gon/off X
Turn th ekeyto position 2in th eignition lock
(Y page 145).
X To switch on/off: turnthe lever in th edirec-
tion of arrow :or;.
Indicato rlamp =lights up or goe sout.
Vehicles without KEYLESS-GO :when you
remove th ekeyfrom th eignition lock, th esteer-
ing whee lheating is switched off.
Vehicles wit hKEYLESS-GO :when you switch off
th ei gnition and open th edriver's door ,the
steering whee lheating is switched off. Steering wheel
111Seats,steering wheel and mirrors Z

Problems with the steering wheel heating
Problem
Possible causes/consequences and
M
MSolutions The steering wheel heat-
ing has switched itself
off prematurely or can-
not be switched on. The on-board voltage is too low because too many electrical consum-
ers are switched on.
X Switch off electrical consumers that you do not need, such as the
rear window heating or interior lighting. EASY-ENTRY/EXIT feature
Important safety notes G
WARNING
When the EASY-ENTRY/EXIT feature adjusts
the steering wheel, you and other vehicle
occupants –particularly children –could
become trapped. There is arisk of injury.
While the EASY-ENTRY/EXIT feature is mak-
ing adjustments, make sure that no one has
any body parts in the sweep of the steering
wheel.
Move the steering wheel adjustment lever if
there is arisk of entrapment by the steering
wheel. The adjustment process is stopped.
Press one of the memory function position but-
tons. The adjustment process is stopped. This
function is only available on vehicles with a
memory function. G
WARNING
If children activate the EASY-ENTRY/EXIT fea- ture, they can become trapped, particularly
when unattended. There is arisk of injury.
When leaving the vehicle, always take the key with you and lock the vehicle. Never leave
children unattended in the vehicle. G
WARNING
If you drive off while the EASY-ENTRY/EXIT
feature is making adjustments, you could lose
control of the vehicle. There is arisk of an
accident.
Always wait until the adjustment process is
complete before driving off. The EASY-ENTRY/EXIT feature makes gettingin
and out of your vehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature using the multimedia sys-
tem (see the separate operating instructions).
Position of the steering wheel when the EASY-ENTRY/EXIT featureisa ctive The steering wheel tilts upwards if you:
R remove the key from the ignition lock
R with KEYLESS-GO: open the driver's door;
KEYLESS-GO must be in position 1
R with the key: open the driver's door; the key
must be in position 0or 1in the ignition lock
(Y page 145)
R open the driver's door when the ignition is
switched off
i The steering wheel only tilts upwards if the
driving position is stored after the steering
column adjustment has been adjusted
(Y page 116).
The most recent driving position of the steering
wheel is stored if:
R the ignition is switched off
R the settingiss tored using the memory func-
tion (Y page 116)
i The steering wheel only moves upwards if it
has not already reached the upper steering
limiter. 112
Steering wheelSeats, steering wheela
nd mirrors

X
Turn the key to position 1or 2in the ignition
lock (Y page 145).
X Press button ;for the right-hand exterior
mirror or button =for the left-hand exterior
mirror.
The indicator lamp lights up in the button that has been pressed.
The indicator lamp goes out again after some
time. You can adjust the selected mirror using adjustmen tbutton :as long as the indicator
lamp is lit.
X Press adjustmen tbutton :up, down, or to
the left or right until you have adjusted the
exterior mirror to the correc tposition. You
should have agood overview of traffic condi-
tions.
The convex exterior mirrors provide alarger field
of vision.
After the engine has been started, the exterior
mirrors are automatically heated if the rear win-
dow heating is switched on and the outside tem- perature is low.
Folding the exterior mirrors in/out elec- trically X
Turn the key to position 1or 2in the ignition
lock (Y page 145).
X Briefly press button :.
Both exterior mirrors fold in or out.
i Make sure that the exterior mirrors are
alway sfolded out fully while driving. They
could otherwise vibrate.
i If you are driving faster than 47 km/h,
you
can no longer fol dintheexterio rmirrors. Resetting th
eexterior mirrors If th
ebattery has been disconnected or com-
pletely discharged, th eexter iorm irror smustbe
reset .The exterio rmirror swill otherwise not
fol dinw hen you select the Automatic Automaticmirror-
mirror-
foldin gfunction
foldin gfunction function in th emultimedia
system.
X Turn th ekeyto position 1or 2in th eignition
loc k(Ypage 145).
X Briefly press :.
Folding th eexterior mirror sin/out
automatically Whe
nthe Automatic
Automatic mirror-folding
mirror-folding func‐
func‐
tion
tion function is activated in th emultimedia sys-
te m( see th eseparat eoperating instructions):
R thee xter iorm irror sfoldina utomatically as
soo nasy ou loc kthe vehicl efromt heoutside
R thee xter iorm irror sfoldo ut automatically
again as soo nasyou unloc kthe vehicle
i If th
eexter iorm irror shaveb een folded in
manually, they do no tfoldo ut.
Exterior mirror pushe dout of position If an exterio
rmirror has been pushed out of
position (forwards or backwards), proceed as
follows:
X Vehicles withou
telectricall yfolding exte-
rior mirrors: manually mov ethe exterio rmir-
ror into th ecorrect position.
X Vehicles wit
helectricall yfolding exterior
mirrors: press and hold button :until you
hear aclick and then th emirror engaging in
position (Y page 114).
The mirror housin gisengage dagain and you
can adjust th eexter iorm irror sasu sual
(Y page 113). Automatic anti-dazzle mirrors
G
WARNING
Electrolyt emay escape if th eglassofana uto-
matic anti-dazzl emirror breaks .Electrol yteis
harmful and causes irritation .Itmustn ot
come into contact wit hyour skin ,eyes ,res-
piratory organs or clothin gorbeswallowed.
There is ariskofi njury. 114
Mir
rorsSeats ,steering wheel and mirrors

Control panel for THERMATIC automatic climat
econtrol Example
:
To set th etem perature, left (Y page 133)
; To set th eair distribution (Y page 133)
= To set th eairflow (Y page 133)
To switch climate control off (Y page 131)
? To set climate control to automatic mod e(Ypage 132)
A To demist th ewindscree n(Ypage 133)
B To call up th eclimate control men uofthemultimedia system (Y page 300)
Vehicle switha uxiliary heating :toswitch the !residual heat on/of f(Ypage 136)
C To switch th erear window heating on/of f(Ypage 134)
D Vehicle switha uxiliary heating :toswitch the &auxiliary heating on/of f(Y page 138)
Vehicle swithout auxiliary heating :toswitch 0synchronisation on/of f(Ypage 133)
E To activate/deactivat eair-recirculation mod emanually (Y page 135)
F To activate/deactivat ecoolin gwitha ir dehumidification (Y page 132)
G To set th etem perature, righ t(Ypage 133) Notes on usin
gthe automatic climate
control
Optimu muse of th eautomatic climate
control The followin
gcontain snotes and recommenda-
tions on optimum use of THERMATIC automatic climate control.
R Activate climate control usin gthe Ã
rocke rswitch .The indicator lamp abov ethe
à rockerswitch light sup. The "Cooling
wit hair dehumidification "function is no tacti-
vated automaticall yinautomatic mode. If necessary, activat
ethisf unction
(Y page 132).
R Set th etem peratur eto22†.
R Only use th e"Windscree ndemisting "function
briefly until th ewindscree nisclear again.
R Only use air-recirculation mod ebriefly, e.g .if
there are unpleasan toutside odour sorwhen
in at unnel. The windows coul dotherwise mist
up as no fresh air is drawn int othe vehicle in
air-recirculation mode.
R Vehicle swithT HERMATIC wit hauxiliary heat-
ing :use th e"residual heat "function if you
want to heat or ventilate th evehicle interior
when th eignition is switched off .The residual
heat function can only be activated or deac- 130
Overview of climat
econtrol systemsClimate control