2015 MERCEDES-BENZ C-Class SEDAN heating

Fuel tank
Capacity ........................................ 398
Problem (malfunction) .................. .174
Fuses
Allocation chart ............................ .356
Before changing ............................ .354
Dashboard fuse box ....................... 355
Fuse box in the engine compart-
ment .............................................. 355
Fuse box in the front-passenger
footwell .......................................... 355
Fuse box in the trunk ..................... 356
Important safety notes .................. 354 G
Garage door opener Clearing the memory ..................... 321
General notes ................................ 318
Important safety notes .................. 319
Opening/closing the garage door .. 321
Programming (button in the rear-
view mirror) ................................... 319
Gasoline ............................................. 398
Genuine parts ...................................... 22
Glove box .......................................... .299 H
Handbrake see Parking brake
HANDS-FREE ACCESS .......................... 93
Hazard warning lamps ......................127
Headlamps Cleaning system (notes) ................ 402
Fogging up ..................................... 128
see Automatic headlamp mode
Head restraints
Adjusting ....................................... 111
Adjusting (electrically) ................... 112
Adjusting (manually) ..................... .111
Adjusting (rear) .............................. 112
Installing/removing (rear) .............. 112
Head-up display
Adjusting the brightness ................ 247
Function/notes ............................ .233
Important safety notes .................. 233
Setting the position ....................... 247 Storing settings (memory func-
tion) ............................................... 121
Switching on or off ......................... 234
Switching the display on/off ......... 246
Heating
see Climate control
High beam flasher .............................126
High-beam headlamps Adaptive Highbeam Assist ............. 127
Changing bulbs .............................. 132
Display message ............................ 265
Switching on/off ........................... 126
Hill start assist .................................. 160
HOLD function Activating ....................................... 197
Deactivating ................................... 197
Display message ............................ 274
Function/notes ............................ .196
Hood
Closing .......................................... .325
Display message ............................ 281
Important safety notes .................. 324
Opening ......................................... 324
Horn ...................................................... 32
Hydroplaning ..................................... 182 I
Ignition lock see Key positions
Immobilizer .......................................... 76
Indicator and warning lamps COLLISION PREVENTION ASSIST
PLUS .............................................. 293
Indicator lamps
see Warning and indicator lamps
Indicators
see Turn signals
Insect protection on the radiator .... 325
Instrument cluster Overview .......................................... 33
Warning and indicator lamps ........... 34
Instrument cluster lighting .............. 230
Interior lighting Control .......................................... .129
Emergency lighting ........................ 130 Index
11

Reserve (fuel tank)
see Fuel
Reserve fuel
Display messag e............................ 270
Warning lamp ................................. 291
Residual heat (climate control) ........ 149
Restraint system Display message ............................ 260
Introduction ..................................... 42
Warning lamp ................................. 290
Warning lamp (function) ................... 43
Reversing feature
Panorama sliding sunroof .............. 102
Roller sunblind s............................. 104
Side windows ................................... 97
Sliding sunroof ............................... 102
Trunk lid ........................................... 91
Reversing lamps (display mes-
sage) ................................................... 266
Roadside Assistance (breakdown) .... 24
Roller sunblind Panorama roof with power tilt/
sliding panel .................................. 104
Rear side window s......................... 308
Rear window .................................. 308
Roller sunblinds (panorama roof
with power tilt/sliding panel)
Operating ....................................... 105
Roof carrier ........................................ 306
Roof lining and carpets (cleaning
guidelines) ......................................... 337
Roof load (maximum) ........................ 403S
Safety Children in the vehicle ..................... 59
Child restraint systems .................... 61
Occupant Classification System
(OCS) ............................................... 51
see Operating safety
Safety system
see Driving safety systems
Seat belts
Adjusting the driver's and front-
passenger seat belt ......................... 47
Adjusting the height ......................... 46 center rear-compartment sea
t......... 47
Cleaning ......................................... 337
Correct usage .................................. 45
Fastening ......................................... 46
Important safety guidelines ............. 44
Introduction ..................................... 44
Releasing ......................................... 47
Warning lamp ................................. 284
Warning lamp (function) ................... 48
Seats
Adjusting (electrically) ................... 110
Adjusting (manually and electri-
cally) .............................................. 110
Adjusting the 4-way lumbar sup-
port ................................................ 112
Adjusting the head restraint .......... 111
Cleaning the cover ......................... 337
Correct driver's seat position ........ 108
Important safety notes .................. 109
Seat heating .................................. 112
Seat heating problem .................... 114
Seat ventilation .............................. 114
Seat ventilation problem ................ 115
Storing settings (memory func-
tion) ............................................... 121
Switching seat heating on/of f....... 112
Switching seat ventilation on/of f.. 114
Selector lever
Cleaning ......................................... 336
see Automatic transmission
Sensors (cleaning instructions) ....... 334
Service menu (on-board com-
puter) .................................................. 244
Service products Brake fluid ..................................... 401
Coolant (engine) ............................ 401
Engine oil ....................................... 400
Fuel ................................................ 397
Important safety notes .................. 397
Refrigerant (air-conditioning sys-
tem) ............................................... 402
Washer fluid ................................... 402
Settings
Factory (on-board computer) ......... 249
On-board computer ....................... 244
Side impact air bag ............................. 5016
Index

Door control panel
Function Page
0043
008D
003700380040
Stores settings for the seat, exterior mirrors and steer-
ing wheel 120
0044
Adjusts the seats electri-
cally
110
0087
0072
Seat heating 112
0085
008E
Seat ventilation 114
0083
Opens the door 87
0084
00360037Unlocks/locks
the vehicle
87
006B
0062
Opens/closes the
rear left side window 97
006C
0062
Opens/closes the left
side window 97 Function Page
006D
0062007000AD0071
Adjusts and folds the exte-
rior mirrors in/out electri-
cally
118
006E
0062
Opens/closes the
right side window 97
006F
0062
Opens/closes the
rear right side window 97
0070
0089
Override feature for
the controls in the rear
compartment 65
0071
008B
Opens/closes the
trunk lid 95Door control panel
39At a glance

Problem
Possible causes/consequences and
0050
0050Solutions The engine cannot be
started using the
SmartKey. 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 347).
or
X Jump-start the vehicle (Y page 349).
or
X Consult a qualified specialist workshop. The engine cannot be
started using the Start/
Stop button. The
SmartKey is in the vehi-
cle. The vehicle is locked.
X Unlock the vehicle and try to start the vehicle again. The SmartKey battery is discharged or nearly discharged.
X Check the SmartKey battery (Y page 84) and replace it if nec-
essary (Y page 84).
If this does not work:
X Start your vehicle with the SmartKey in the ignition lock. There is interference from a powerful source of radio waves.
X Start your vehicle with the SmartKey in the ignition lock. You have lost a Smart-
Key. X
Have the SmartKey deactivated at a qualified specialist work-
shop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. 86
SmartKeyOpening and closing

poses an increased risk of injury or even fatal
injury.
Adjust the seat properly before beginning
your journey. Always ensure that the backrestis in an almost vertical position and that the
shoulder section of your seat belt is routed
across the center of your shoulder.
! To avoid damage to the seats and the seat
heating, observe the following information:
R keep liquids from spilling on the 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
heating should also not be used to dry
the seats.
R clean the seat covers as recommended;
see "Interior care".
R do not transport heavy loads on the
seats. Do not place sharp objects on the
seat cushions, e.g. knives, nails or tools. The seats should only be occupied by
passengers, if possible.
R when the seat heating is in operation, do
not cover the seats with insulating mate-
rials, e.g. blankets, coats, bags, seat cov- ers, child seats or booster seats.
! Make sure that there are no objects in the
footwell under or behind the seats when
moving the seats back. There is a risk that
the seats and/or the objects could be dam- aged.
i The rear-compartment head restraints
can be removed (Y page 112).
Vehicles without the through-loading fea-
ture: the head restraints cannot be
removed from the rear compartment seats.
For more information, contact a qualified
specialist workshop.
i Further related subjects:
R Rear bench seat through-loading feature
(Y page 301) Adjusting the seats manually and
electrically Adjusting the seats electrically
Electrically adjustable seats with
memory function
0043 Head restraint height
0044 Backrest angle
0087 Seat height
0085 Seat cushion length
0083 Seat cushion angle
0084 Seat fore-and-aft adjustment
i Further related subjects:
R You can store the seat settings using the
memory function (Y page 121).
R If PRE-SAFE ®
is triggered, the front-
passenger seat will be moved to a better
position if it was previously in an unfav-
orable position (Y page 58). Electrically adjustable seats without
memory function
0043 Backrest angle 110
SeatsSeats, steering wheel and mirrors

Adjusting the height of the head
restraints electrically X
To adjust the head restraint height: slide
the switch for head restraint adjustment
(Y page 110) up or down in the direction of
the arrow.
Adjusting the rear seat head restraint
height X
Once the head restraint is fully lowered,
press release catch 0043.
X To raise: pull the head restraint up to the
desired position.
X To lower: press release catch 0043and push
the head restraint down until it is in the
desired position.
Installing and removing rear head
restraints X
Release the rear seat backrest and fold it
slightly forwards (Y page 302).
X To remove: pull the head restraint up to
the stop.
X Press release catch 0043and pull the head
restraint out of the guides.
X To re-install: insert the head restraint so
that the notches on the bar are on the left
when viewed in the direction of travel.
X Push the head restraint down until you hear
it engage in position.
X Fold back the rear seat backrest until it
engages. Adjusting the 4-way lumbar support
0043
To raise the backrest contour
0044 To soften the backrest contour
0087 To lower the backrest contour
0085 To harden the backrest contour
You can adjust the contour of the front seat
backrests individually to provide optimum
support for your back. Switching the seat heating on/off
Switching on/off G
WARNING
Repeatedly switching on the seat heating can
cause the seat cushion and backrest pads to
become very hot. The health of persons with
limited temperature sensitivity or a limited
ability to react to excessively high tempera- 112
SeatsSeats
, steering wheel and mirrors

tures may be affected or they may even suffer
burn-like injuries. There is a risk of injury.
Therefore, do not switch the seat heating on
repeatedly. The three red indicator lamps in the button
indicate the heating level you have selected.
The system automatically switches down
from level 3to level 2after approximately
eight minutes.
The system automatically switches down
from level 2to level 1after approximately ten
minutes.
The system automatically switches off
approximately 20 minute s after it is set to
level 1.
X Turn the SmartKey to position 1or 2in the
ignition lock (Y page 157).
X To switch on: press button0043repeatedly
until the desired heating level is set.
X To switch off: press button0043repeatedly
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
heating may switch off.
i If drive program
E(Y page 168) is selec-
ted, the power of the seat heating is
reduced. Seats
113Seats, steering wheel and mirrors Z

Problems with the seat heating
Problem
Possible causes/consequences and
0050
0050Solutions The seat heating has
switched off prema-
turely or cannot be
switched on. The on-board voltage is too low because too many electrical con-
sumers are switched on.
X Switch off electrical consumers that you do not need, such as
the rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating can be
switched back on manually. Switching the seat ventilation on/off
Activating/deactivating The three blue indicator lamps in the buttons
indicate the ventilation level you have selec-
ted.
X Turn the SmartKey to position 1or 2in the
ignition lock (Y page 157).
X To switch on: press button0043repeatedly
until the desired ventilation level is set.
X To switch off: press button0043repeatedly
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
ventilation may switch off.
i You can open the side windows and the
sliding sunroof using the "Convenience
opening" feature (Y page 98). The seat ven-
tilation of the driver's seat automatically
switches to the highest level.
i When the vehicle is stationary, the fan
speed can be reduced automatically. This
reduces the noises of the seat ventilation. 114
SeatsSeats, steering wheel and mirrors