warning lights MERCEDES-BENZ C-CLASS SALOON 2012 Owner's Manual

Display messages
Possible causes/consequences and M
MSolutions
: Active Light System inoper-
ative *T
he active headlamp s are malfunctioning. #
Consult a qualified specialist workshop.
: Switch on headlamps *Y
ou are driving without lo w-beam headlamps. #
Turn the light switch totheL orà position.
:
Switch off lights *Y
ou are leaving theve hicle and the lights are still switched on. #
Turn the light switch totheà position.
: Intelligent Light System
inoperative *T
he Intelligent Light Sy stem is malfunctioning. The lighting sy stem continues tofunction proper lywithout the func‐
tions of the Intelligent Light Sy stem. #
Consult a qualified specialist workshop. 452
Display messages and warning/indicator lamps
Internal use only

Instrument display (standard)
Wi
descreen cock pit instrument displ ay Depending on
the display setting, the positions
of the indicator lamps on the instrument display
may dif fer from theex ample shown.
Indicator and warning lamps:
6 Re
stra int sy stem (/ page 500)
ü Seat belt (/
page 500)
ï Trailer hit ch (/page 501)
Ù Powe rst eering (/ page 501)
ÿ Coolanttemp erature (/ page 502)
; Engine diagnostics (/
page 502)
% Preglow
# Elect
rical fault (/ page 502)
8 Re
ser vefuel with fuel filler flap loca‐
tion indicator (/ page 502)
! Elect
ric pa rking brake (red)
(/ page 505)
! Electric parking brake (yellow)
(/
page 505)
J Brakes (yellow) (/
page 505)
J Brakes (red) (/
page 505)
L Distance warning (/ page 507) ä
AIRMATIC (/ page 507)
ä DYNA MIC BODY CONTROL
(/ page 507)
! ABS (/
page 508)
÷ ESP®
(/ page 508)
å ESP®
OFF (/ page 508)
h Ty
re pressure monitoring sy stem
(/ page 511)
T St
anding lights (/ page125)
L Low beam (/
page125)
K High beam (/
page127)
#! Tu
rn signal lights (/ page127)
R Re
ar fog light (/ page125) Displ
aymessa ges and warning/indicator lamps 499
Internal use only

Occupant saf
ety Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
6 Re stra int sy stem warning
lamp *T
he redre stra int sy stem warning lamp is lit while the engine is running.
The restra int sy stem is malfunctioning (/ page 38). &
WARNING Risk of injury duetomalfunctions in there stra int sy stem
Components in there stra int sy stem may be activated unintentionally or not deploy as intended in an accident. #
Have there stra int sy stem checked and repaired immediately at a qualified specialist workshop. #
Drive on carefully. #
Notethe messages on the multifunction displa y. #
Consult a qualified specialist workshop immediatel y.
ü
Seat belt warning lamp *T
he red seat belt warning lamp flashes and an intermit tent wa rning tone sounds.
or
The red seat belt warning lamp lights up once the engine has star ted.
In addition, an intermittent warning tone may sound.
The red seat belt warning lamp flashes and an intermit tent wa rning tone sounds:
The driver or front passenger has not fastened his or her seat belt while theve hicle is in motion. #
Fasten your seat belt (/ page41).
There are objects on the front passenger seat. 500
Display messages and warning/indicator lamps
Internal use only

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
Remo vethe objects from the front passenger seat.
The red seat belt warning lamp lights up once the engine has star ted:
In addition, an intermittent warning tone may sound.
The red seat belt warning lamp reminds the driver and front passenger tofasten their seat belts. #
Fasten your seat belt (/ page41).
If yo u ha veplaced objects on the front passenger seat, there d seat belt warning lamp may remain lit. Ve
hicle Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
Ù Po we rst eering warning
lamp (red) *T
he red po werst eering sy stem warning lamp is lit while the engine is running.
The po wer assi stance or thesteering itself is malfunctioning. &
WARNING Risk of accident if steering capability is impaired
If th esteering does not function as intended, theve hicle's operating saf ety is jeopardised. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do
not continue driving under any circums tances. #
Consult a qualified specialist workshop. #
Notethe messages on the multifunction displa y. Displ
aymessa ges and warning/indicator lamps 501
Internal use only

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
8 Fu elreser ve wa rning lamp
lights up *T
he yellow fuel reser vewarning lamp lights up while the engine is running.
The fuel supply has dropped into there ser verange. #
Refuel. Brakes
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
! Elect ric pa rking brake indi‐
cator lamp (red)
!
The elect ric pa rking brake
(yellow) indicator lamp *T
he red elect ric pa rking brake indicator lamp flashes or is lit.
The yellow elect ric pa rking brake indicator lamp also lights up in theev ent of a malfunction. #
Notethe messages on the multifunction displa y. Displ
aymessa ges and warning/indicator lamps 505
Internal use only

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
Stop in a safe location immediately. Do not continue driving! #
Consult a qualified specialist workshop. &
WARNING Risk of an accident due tolow brake fluid le vel
If th e brake fluid le vel is too lo w,the braking ef fect and the braking characteristics may be impaired. #
Stop theve hicle as soon as possible, paying attention toroad and traf fic conditions. Do not continue driv‐
ing. #
Consult a qualified specialist workshop. #
Do not top up the brake fluid. Driving sy
stems Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
L Wa rning lamp for dis tance
wa rning function *T
he red dis tancewarning lamp lights up while theve hicle is in motion.
The dis tance totheve hicle in front is too small forth e speed selected.
If th ere is an additional warning tone, you are approaching an obs tacle at too high a speed. #
Be prepared tobrake immediatel y. #
Increase the dis tance. Display messa
ges and warning/indicator lamps 507
Internal use only

Ý
Please wait 48 V battery charg‐
ing ........................................................ .488
_ Rear left seat backrest not
loc ked (Example)................................... 459
h Rectify tyre pressure.................... 491
Ø Refill Ad Blue See Owne r’s
Manual.................................................. 493
! Release parking brake .................. 468
¸ Replace air cleaner ...................... 462
Á Replace key.................................. 449
8 Reser vefuel le vel......................... 462
6 Restra int sys. malfunction Con‐
sult workshop........................................ 446
# See Owner's Manual.................... 487
Ù Steering malfunction Incre ased
ph ysical ef fort See Owner's Manual ...... 457
Ù Steering malfunction Stop
immediately See Owner's Manual ......... 458
# Stop vehicle Lea veengine run‐
ning ....................................................... 488 #
Stop vehicle See Owner's Man‐
ual......................................................... 487
É Stop vehicle Vehicle too low......... 479
ç suspended.................................... 472
: Switch off lights ........................... 452
: Switch on headlamps................... 452
Ø Top up AdBlue Emergency op.
in XXX miles See Owner's Manual......... 493
+ Top up coolant See Owner ’s
Manual.................................................. 460
¥ Top up washer fluid ...................... 460
! Turn on the ignition torelease
th e parking brake..................................4 68
d Vehicle is operational Switch
off ignition before exiting..................... .456
É Vehicle rising Please wait............ .480
É Vehicle rising................................4 80
h Warning tyre defect..................... .491
h Wheel sensor(s) missing .............. 490Ø
XX,X l Top up AdBlue Switch on
ignition, wait 60 sec. or eng. start
not poss................................................ 494
Ac tive Blind Spot Assi stcur rently
una vailable See Owner's Manual ...........476
Ac tive Blind Spot Assi stinope rative ....... 476
Ac tive Blind Spot Assi stnot available
when towing a trailer See Owner's
Manual .................................................. 477
Ac tive bonnet malfunction See Own‐
er's Manual........................................... 458
Ac tive Brake Assi stFunctions cur‐
re ntly limited See Owner's Manual ........ 484
Ac tive Brake Assi stFunctions limited
See Owner's Manual............................. 485
Ac tive Dis tance Assi stavailable again ...4 73
Ac tive Dis tance Assi stcur rently
una vailable See Owner's Manual ...........472
Ac tive Dis tance Assi stinope rative ......... 472 524
Index
Internal use only

Diesel...................................................
.433
E10....................................................... .432
Flexible fuel vehicles.............................4 32
Fu elreser ve.......................................... 434
Low outside temp eratures..................... 433
Pe trol..................................................... 432
Quality (diesel)...................................... 433
Quality (p etro l)...................................... 432
Re fuelling............................................... 172
Sulphur content..................................... 432
Ta nk content......................................... 434
Fu nction seat
see Door cont rol panel
Fu ses
Before replacing a fuse.......................... 407
Fu se assignment diagram...................... 407
Fu se box in the boot.............................. 409
Fu se box in the engine compartmen t.... 408
Fu se box in the front passenger foot‐
we ll....................................................... 409
Fu se box on the dashboard................... 409
No tes..................................................... 407 G
Garage door opener Cleari ngthe memory.............................1 82
Opening or closing the door................... 181
Programming buttons............................ 180
Re solving problems...............................1 81
Synchronising thero lling code............... 181
Gearshift recommendation..................... .170
Gene ral operating permit number (EU)... 428
Genuine parts............................................. .22
Genuine wood (Care) ................................ 385
Glide mode................................................ .171 H
Handbrake see Electric parking brake
Handling characteristics (unusual).......... 41 0
HANDS-FREE ACCESS ................................ .83
Hazard warning lights.............................. .128
HD prog rammes
see CI+ module Head
restra int
Fr ont (adjusting mechanically)..............1 03
Re ar (adjusting).................................... .104
Re ar (fitting/removing)......................... .105
Head-up display Adjusting display elements (on-board
compu ter).............................................. 24 9
Ad justing the brightness (on-board
computer).............................................. 24 9
Fu nction................................................ 24 8
Menu (on-board computer).................... 24 9
Operating the memory function.............1 11
Setting the position (on-board com‐
puter)....................................................2 49
Switching on/of f................................... 24 9
Headlamp flashing.................................... 127
Headlamps see Automatic driving lights
Heating see Climate control
Help call see Mercedes-Benz emergency call sy stem
High beam Activating/deactivating......................... 127530
Index
Internal use only

Ad
ditives (fuel)...................................... 433
Brake fluid............................................ .438
Coolant (engine).................................... 438
Engine oil.............................................. 436
Fu el (diesel)...........................................4 33
Fu el (petrol)........................................... 432
No tes....................................................4 30
Wi ndsc reen washer fluid.......................4 39
Operating saf ety
48 V on-boa rdelectrical sy stem.............. 23
Declaration of confo rmity (elect ro‐
magnetic compatibility)........................... 25
Declaration of conformity (jack).............. 28
Declaration of conformity (TIREFIT kit).... 29
Declaration of conformity (wire less
ve hicle components)...............................25
EQ Boo st................................................. 23
Information.............................................. 23
Ope rating sy stem
see On-board computer
Optimised acceleration Activating.............................................. 15 8
Outside mir rors
Anti-dazzle mode (automatic)................ 14 2Au
tomatic mir rorfo lding function......... .143
Fo lding in/out........................................ 141
Operating the memory function.............1 11
Pa rking position..................................... 14 2
Setting................................................... 141
Overhead control panel Overview................................................. 14
Owner's Manual Vehicle equipment................................... 23
Owner's Manual (digital)............................ 20 P
Pa int code.................................................. 428
Pa intwork (cleaning instructions) ...........383
Pa norama sliding sunroof
see Sliding sunroof
Pa rk position
Inserting................................................ 16 9
Selecting au tomatical ly......................... 16 9
Pa rked Vehicle Locator
Switching transmission on/of f.............. 276
Pa rking
see Electric parking brake Pa
rking aid
see Parking Assist PARKTRONIC
Pa rking Assist PARKTRONIC
Ac tivating.............................................. 230
Ad justing warning tones........................ 231
Deactivating.......................................... 230
Fu nction................................................ 227
Side impact pr otection.......................... 229
Sy stem limitations................................. 227
Pa rking assistance sy stems
see Active Parking Assist
Pa rking brake
see Electric parking brake
Pa rking lights............................................ .125
Pa rking position
Outside mir rors..................................... 14 2
St oring the position of the passenger
outside mir ror using reve rsege ar.......... 14 3
Pa rking up.................................................. 184
PA SSENGER AIR BAGstatus display
see Automatic front passenger front
airbag shutoff 538
Index
Internal use only

Wa
rning/indicator lamp
! ABSwarning lamp....................... .508
J Brake sy stem warning lamp
(red)...................................................... 506
J Brake sy stem warning lamp
(yellow).................................................. 506
ÿ Coolant warning lamp................. .502
! Electric parking brake indicator
lamp (red).............................................. 505
# Electrical fault warning lamp....... .504
; Engine diagnosis warning lamp....5 04
å ESP®
OFF warning lamp.............. .510
÷ ESP®
wa rning lamp..................... .509
8 Fuelreser ve wa rning lamp
lights up................................................ 505
Ù Powe rst eering warning lamp
(red)...................................................... .501
6 Restra int sy stem warning lamp....5 00
ü Seat belt warning lamp............... .500 ä
Suspension warning lamp (yel‐
low)....................................................... 508
! The elect ric pa rking brake (yel‐
low) indicator lamp............................... .505
ï Trailer tow hit chwarning lam p..... 502
h Tyre pressure monitoring sys‐
te m wa rning lamp................................. .511
L Warning lamp for dis tance
wa rning function................................... .507
Wa rning/indicator lamps
Overview............................................... 498
PA SSENGER AIR BAG.............................. 48
Wa rranty ...................................................... 33
Wa sher fluid
see Windsc reen washer fluid
Wa shing byhand (care)............................ 382
Wa ter tank
see Air-water duct
We ather information ................................. 313What3words
Destination entry with a 3 word
address................................................. 293
Wheel change
Fitting a new wheel............................... 422
Lo we ring theve hicle.............................4 23
Prepa ration............................................ 41 8
Ra ising theve hicle................................4 20
Re moving a wheel................................. 422
Re moving/fitting hub caps....................4 19
Wheel change
see Emergency spare wheel
Wheel rotation .......................................... .417
Wheels Care ...................................................... 384
Changing hub caps................................ 419
Checking............................................... .410
Checking the tyre pressure (tyre
pressure monitoring sy stem)................. 413
Fitting................................................... .422
Flat tyr e................................................. 390
Inter changing......................................... 417
MOExtended tyres................................. 391
Noise.....................................................4 10 Index
551
Internal use only