trailer MERCEDES-BENZ C-CLASS SALOON 2012 Service Manual

Display messages
Possible causes/consequences and M
MSolutions
Active Blind Spot Assist
not available when towing
a trailer See Owner's Man-
ual *W
hen you es tablish the electrical connection tothe trailer, Active Blind Spot Assi stwill be una vailable. #
Press the left-hand Touch Control and ackn owledge the display message.
Active Lane Keeping Assist
currently unavailable See
Owner's Manual *A
ctive Lane Keeping Assist is temp orarily una vailable.
The ambient conditions are outside the sy stem limits (/ page216).
As soon as the ambient conditions are within the sy stem limits, the sy stem will become available again.
Ve hicles with Active Steering Assis t:the camera view may be limited bythe windscreen. #
Drive on.
Ve hicles with Active Steering Assis t:ifth e display message does not disappear: #
Stop theve hicle in accordance with the tra ffic conditions. #
Clean the windscreen.
Active Lane Keeping Assist
inoperative *A
ctive Lane Keeping Assist is malfunctioning. #
Consult a qualified specialist workshop.
Active Lane Keeping Assist
Camera view restricted
See Owner's Manual *
Ve hicles without Active Steering Assis t:the camera view is restricted.
Po ssible causes:
R dirt on the windscreen in the camera's field of vision
R heavy rain, snow or fog Displ
aymessa ges and warning/indicator lamps 477
Internal use only

Display messages
Possible causes/consequences and M
MSolutions
É Vehicle rising *Y
our vehicle is adjusting tothe le velyo u ha veselected.
É Vehicle rising Please wait *T
hevehicle le vel is too lo w.The vehicle will be raised tothe selected vehicle le vel. #
Wait until the display message disappears before pulling away.
É Please reduce speed *Y
ou are driving toofast forth e selected vehicle le vel. #
Toadjust theve hicle le vel,yo u must not drive at speeds greaterth an 60 km/h. #
Toadjust theve hicle le vel during trailer operation, you must not drive at speeds greaterth an 30 km/h.
Active Parking Assist
Manoeuvring assistance
limited See Owner's Manual *T
heParking Assist manoeuvring assis tant is temp orarily una vailable or only partially available. #
Clean all sensors of the parking and camera sy stem (/ page 384). #
Ifth e display message still appears, consult a qualified specialist workshop.
Active Parking Assist and
PARKTRONIC inoperative
See Owner's Manual *
Ve hicles with Active Parking Assis t:Ac tive Parking Assist and Parking Assist PARKTRONIC are malfunctioning.
Ve hicles without Active Parking Assis t:Pa rking Assist PARKTRONIC is malfunctioning. #
Stop theve hicle in accordance with the tra ffic conditions and restart the engine. 480
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

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
ï Tr ailer tow hit chwarning
lamp *T
hered trailer hitch warning lamp is lit.
The trailer hitch is not operational. &
WARNING Risk of an accident if the ball neck is not loc ked
The trailer may become de tach ed. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Uncouple the trailer and secure it against rolling away. #
Initiate a new swivel mo vement and do not re-couple the trailer until thewa rning/indicator lamp goes out. #
Notethe messages on the multifunction displa y.Engine
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
ÿ Coolant warning lamp *T
he red coolant warning lamp is lit while the engine is running.
Po ssible causes:
R The temp erature sensor is malfunctioning
R The coolant le vel is too low
R The air supply tothera diator is obstructed
R The radiator fan is faulty 502
Display messages and warning/indicator lamps
Internal use only

é
ATTENTION ASSIS T:Take a
break!....................................................4 70
: Automatic driving lights inoper‐
ative....................................................... 451
Á Change key bat teries ...................4 49
J Checkbrake fluid le vel................. 469
# Check brake pads See Owner's
Manual.................................................. 469
5 Check engine oil le vel when
next refuelling....................................... 496
ï Checktrailer hitch lo ck................ 456
h Check tyre(s)................................ 490
! Clean the fuel filter ...................... 462
ÿ Coolant Stop vehicle Switch
engine off..............................................4 61
! currently una vailable See Own‐
er's Manual ............................................ 481
÷ currently una vailable See Own‐
er's Manual .......................................... .482 5
Engine oil le vel cannot be
measured .............................................. 498
5 Engine oil le velRe duce oil le vel.... 497
5 Engine oil le velSt op vehicle
Switch engine off.................................. 497
5 Engine oil pressure Stop
Switch off engine.................................. 498
ä Fault Drive at max. 80 km/h........ 478
6 Front left malfunction Consult
wo rkshop (e xample).............................. 446
& inoperative Battery low................ 455
& inoperative Refuel vehicle ............ 455
& inoperative See Owner's Man...... 455
! inoperative See Owner's Man‐
ual......................................................... 482
÷ inoperative See Owner's Man‐
ual......................................................... 483
T inoperative See Owner's Man‐
ual......................................................... 484
G Inoperative................................... 486 :
Intelligent Light Sy stem inoper‐
ative...................................................... 452
Á Key not de tected (red displ ay
messa ge)............................................... 450
Á Key not de tected (white display
messa ge)............................................... 449
: Left dipped beam (e xamp le)........ .451
6 Left windowbag malfunction
Consult workshop (e xample)................ .446
¢ Lowe ring..................................... .479
: Malfunction See Owner's Man‐
ual......................................................... 451
ð Maximum speed exceeded ........... 473
Ø ..................................................... 493
ç Off................................................ 472
ë Off................................................ 470
! Parking brake See Owner's
Manual .................................................. 465
É Please reduce speed .................... 480 Index
523
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

Ac
tive Lane Keeping Assist Camera
view restricted See Owner's Manual..... 477
Ac tive Lane Keeping Assist cur rently
una vailable See Owner's Manual ...........477
Ac tive Lane Keeping Assist inopera‐
tive........................................................ 477
Ac tive Parking Assist and
PA RKTRONIC inoperati veSee Own‐
er's Manual........................................... 480
Ac tive Parking Assist Manoeuvring
assis tance limited See Owner's Man‐
ual........................................................ .480
Ac tive Steering Assist cur rently
una vailable due tomultiple emer‐
ge ncy stops...........................................4 74
Ac tive Steering Assist cur rently
una vailable See Owner's Manual ...........473
Ac tive Steering Assist inoperative .........473
Ad aptive Highbeam Assist Camera
view restricted See Owner's Manual..... 453 Ad
aptive Highbeam Assist cur rently
una vailable See Owner's Manual ...........453
Ad aptive Highbeam Assist inoperative.. 453
Ad aptive Highbeam Assist Plus Cam‐
era view restricted See Owner's
Manual.................................................. 454
Ad aptive Highbeam Assist Plus cur‐
re ntly una vailable See Owner's Man‐
ual......................................................... 454
Ad aptive Highbeam Assist Plus inop‐
erative.................................................. .454
App lybrake todeselect Park (P)
position................................................. 463
Apply brake toselect R......................... 463
Au xilia rybattery malfunction ................ 465
Beginning emer gency stop.....................4 74
Blind Spot Assi stcur rently una vaila‐
ble See Owner's Manual ........................475
Blind Spot Assi stinope rative ................. 476Blind Spot Assi
stnot available when
to wing a trailer See Owner's Manual .....476
Cann otstart engine See Owner's
Manual................................................. .489
Cruise control and Limi ter inoperative.. .471
Cruise contro l inoperative...................... 471
Cruise contro l off................................... 471
Fr ont-passenger airbag disabled See
Owner's Manual....................................4 47
Fr ont-passenger airbag enabled See
Owner's Manual....................................4 47
Haza rdwa rning lamps malfunctioning...4 55
Limi ter inoperative................................ .471
Limiter passive ....................................... 471
Mercedes me connect Services limi‐
te d See Owner's Manual....................... 486
Mo tor can be star ted again...................4 89
N permanently active Risk of vehicle
ro lling .................................................... 463 Index
525
Internal use only

Driving abroad
Symmetrical low beam.......................... 12 5
Driving saf ety sy stem
ABS (Anti-lock Braking Sy stem).............1 87
Ac tive Brake Assi st................................ 206
Ad aptive brake lights............................. 19 2
BA S (Brake Assi stSystem).................... 187
Cameras............................................... .186
EBD (Electronic Brake forc e Distribu‐
tion).......................................................1 90
ESP ®
Crosswind Assis t.......................... 189
ESP ®
trailer stabilisation.......................1 89
Overview.............................................. .186
Ra dar and ultrasonic sensor s................ 186
Re sponsibility........................................1 85
ST EER CONTROL................................... 19 0
Driving sy stem
DY NA MIC BODY CONTROL.................... 218
Driving sy stem
see 360° Camera
see Active Blind Spot Assi st
see Active Dis tance Assi stDISTRONIC
see Active Emergency Stop Assist
see Active Lane Keeping Assist
see Active Parking Assist see
Active Speed Limit Assi st
see Active Steering Assist
see AIRMATIC
see ATTENTION ASSIST
see Blind Spot Assist
see Cruise control
see Driving saf ety sy stem
see HOLD function
see Limiter
see Parking Assist PARKTRONIC
see Reversing camera
see Traf fic Sign Assi st
Driving tips Driving abroad (symmetrical low
beam)....................................................1 25
Gene ral driving tips.............................. .159
optimised acceleratio n..........................15 8
Ru nning-in no tes.................................... 157
Dr ows iness de tection
see ATTENTION ASSIST
DY NA MIC BODY CONT ROL
Chassis.................................................. 218
Dynamic handling cont rol sy stem
see ESP ®
(Elect ronic Stability Prog ram) DY
NA MIC SELECT
Configuri ng drive program I................... 167
Displ aying engine data........................... 167
Displ aying vehicle dat a.......................... 167
Drive prog ram displa y............................ 16 6
Drive prog rams...................................... 16 5
Fu nction................................................ 16 5
Operating (DYNAMIC SELECT switch)....1 66
Selecting the drive prog ram.................. 16 6
Showing ope ration feedback.................1 67 E
E10 ............................................................ .432
Easy entry feature
Fu nction/no tes..................................... 109
Setting................................................... 11 0
Easy exitfeature
Fu nction/no tes..................................... 109
Setting................................................... 11 0
EBD (Electronic Brake forc e Distribu‐
tion)
Function/no tes..................................... 19 0
ECO Assist Function/no tes..................................... 16 4 Index
527
Internal use only

Sur
round View
see 360° Camera
Suspension Setting the suspension le vel (AIR‐
MATIC)................................................... 219
Suspension see AIRMATIC
Suspension le vel (AIRMATIC)
Setting................................................... 219
SV HC (substances of very high con‐
cern) ............................................................. 32
Switch-off del aytime
Exterio r.................................................. 13 3
Interior.................................................. 13 5
Switching the sur round sound on/off
Burmes ter®
sur round sound sy stem..... 370
Switching volume adjustment on/off
Adva nced sound sy stem........................3 71
Synchronisation function Activating/deactivating (multimedia
sy stem).................................................. 147
Switching on/off (control panel )........... 14 6Sy
stem settings
Ac tivating/deactivating PIN pr otec‐
tion........................................................ 281
Re set function (multimedia sy stem)...... 285
Setting the dis tance uni t....................... 280
Setting the time and date automati‐
cally.......................................................2 75
Setting the time zone. ........................... 275
Setting the time/date form at................ 276
Switching transmission of theve hicle
position on/off...................................... 276
Sy stem settings
see Blue tooth®
see Data import/export
see Language
see Wi-Fi T
Ta ilpipes (care)......................................... .384
Ta ke -back of end-of-life vehicles
Pr otection of the environmen t................. 21
Ta nk content
Ad Blue ®
................................................ 436
Fu el....................................................... 434 Re
ser ve(fuel)........................................ 434
Te ch nical data
Axle load (trailer operation)...................4 43
Fa stening points (trailer hitch)............... 441
Information............................................ 426
Mounting dimensions (trailer hitch)...... .441
No tes (trailer hitch)................................4 41
Overhang dimension (trailer hitch)........4 41
Ra dio operating permits........................ 428
To ngue weight...................................... .443
To wing capacity (trailer operation)........ 442
Ve hicle identification plate.................... 428
Te lephone
Ac tivating functions du ring a cal l.......... 320
Call and ringtone volume...................... .320
Calls with se veral participant s............... 320
Connecting a mobile phone (Near
Field Communication (NFC)).................. 319
Connecting a mobile phone (Passk ey)... 316
Connecting a mobile phone (Secure
Simple Pairing)...................................... .316
De-authorising a mobile phone.............. 318
Disconnecting a mobile phone............... 318
Importing contacts................................ 322
Importing contacts (o verview).............. .322 Index
545
Internal use only

To
uchpad
Ac tivating/deactivating ha ptic oper‐
ation feedback......................................2 69
Operating.............................................. 267
Re ading the handwriting recognition
aloud. .................................................... 268
Selecting a station and track.................2 69
Setting the sensitivity............................2 68
Switching on/of f................................... 267
To w- aw ay protection
Fu nction.................................................. 95
Priming/deactivating.............................. 96
To w- bar sy stem........................................ .243
To w- starting............................................... 407
To wing away.............................................. 403
To wing eye
Ins talling............................................... .406
St orage location.................................... 406
To wing me thods ........................................ 402
Tr ack
Selecting (audio mode )......................... 350
Tr af fic announcements
Ac tivating/deactivating......................... 361 Tr
af fic information
Displaying the tra ffic map.................... .305
Displ aying traf fic incidents.................... 306
Extending a Live Traf fic Information
subscription.......................................... 305
Issuing hazard warnings........................ 307
Live Traf fic Information......................... 305
Overview............................................... 304
Re gis tering Live Traf fic Information....... 305
Tr af fic map
see Map
Tr af fic Sign Assist
Fu nction/no tes...................................... 211
Setting................................................... 212
Sy stem limitations................................. 211
Tr ailer hitch
Axle load.............................................. .443
Bicycle rack ........................................... 241
Car e...................................................... 384
Coupling up/uncoupling a trailer.......... 239
Fa stening points.................................... 441
Fo lding the ball neck out/in.................. 237
General no tes........................................4 41
Mounting dimensions............................ 441
No tes..................................................... 237 Overhang dimension..............................
441
Soc ket.................................................. .239
To ngue weight...................................... .443
To wing capacity.................................... .442
Tr ailer operation
Ac tive Blind Spot Assi st......................... 215
Ac tive Lane Keeping Assist.................... 216
Bicycle rack ........................................... 241
Coupling up/uncoupling a trailer.......... 239
Fo lding the ball neck out/in..................2 37
No tes..................................................... 237
Soc ket.................................................. .239
Tr ailer stabilisation
Fu nction/no tes..................................... 189
Tr ansfer redve hicle data
Android Auto......................................... 331
Apple CarPl ay®
...................................... 331
Tr ansmission (problem)........................... .169
Tr ansmission of theve hicle position
Ac tivating/deactivating......................... 276
Tr ansmission position display.................. 167
Tr anspo rting
Ve hicle..................................................4 05 Index
547
Internal use only