2011 MERCEDES-BENZ C-CLASS SALOON radiator

Fuel reserve
Display message (12-button mul-
tifunctio nsteering wheel) ..............271
Display message (4-button multi-
function steering wheel) ................269
see Fuel
Fuel tank
Capacity ........................................ 380
Problem (malfunction) ...................173
Fuse allocation chart (vehicle tool
kit) ...................................................... 335
Fuses Allocation chart ............................. 355
Before changing ............................. 355
Dashboard fuse box .......................355
Fuse box in the boot ......................356
Fuse box in the engine compart-
ment .............................................. 355
Fuse box in the luggage compart-
ment .............................................. 356
Important safety notes ..................354 G
Gear indicator (12-button multi-
function steering wheel) ..................245
Gear or selector lever (cleaning
instructions) ...................................... 332
Gearshift program SETUP (on-board computer) ..........245
Genuine Mercedes-Benz parts .........376
Glove compartment ..........................303 H
Handbrake see Parking brake
Hazard warning lamps ......................121
Headlamp Cleaning system (function) ............120
Headlamps
Misting up ...................................... 123
Topping up the cleaning system ....325
see Automatic headlamp mode
Head restraints
Adjusting ....................................... 107
Adjusting (electrically). ..................107
Adjusting (manually). .....................107Adjusting (rear)
.............................. 107
Fitting/removing (rear) ..................108
Luxury ............................................ 107
see NECK-PR Ohead restraints
see NECK-PRO head restraints/
NECK-PRO luxury head restraints
Heating
see Climate control
High-pressure cleaners ....................328
Hill start assist .................................. 156
HOLD function Display message (12-button mul-
tifunctio nsteering wheel) ..............273
Display message (4-button multi-
function steering wheel) ................272
Function/notes ............................. 193
Hook ................................................... 308 I
ICS padded play table .........................65
Ignition lock see Key positions
Immobiliser .......................................... 80
Indicator and warning lamps Coolant .......................................... 298
DISTRONI CPLUS ........................... 300
Engine diagnostics .........................298
Fuel tank ........................................ 298
Overview (12-button multifunc-
tion steering wheel) .........................39
Overview (4-button multifunction
steering wheel) ................................ 36
SPORT handling mode ...................296
Indicator lamps
see Warning and indicator lamps
Indicators
see Turn signals
Insectp rotection on the radiator ....323
Instrument cluster (12-button mul-
tifunction steering wheel)
Indicator and warning lamps ............39
Overview .......................................... 37
Settings ......................................... 239
Instrument cluster (4-button mul-
tifunction steering wheel) Indicator and warning lamps ............36
Overview .......................................... 34 Index
13

Parking lamp
Display message (12-button mul-
tifunction steering wheel) ..............266
Display message (4-button multi-
function steering wheel) ................263
Parking lamps
Changing bulbs .............................. 127
Switching on/off ........................... 118
Parking lamps (changing bulbs) ......127
PARKTRONIC Deactivating/activating .................198
Driving system ............................... 196
Function/notes ............................. 196
Problem (fault) ............................... 199
Sensor range ................................. 196
Trailer towing ................................. 198
Warning displa y............................. 197
PASSENGE RAIRBAG OFF warning
lamp ...................................................... 59
Permanent four-wheel drive see 4MATIC (permanen tfour-
wheel drive)
Petrol .................................................. 169
Plastic trim (cleaning instructions) .331
Power windows see Side windows
PRE-SAFE ®
(preventative occupant
protection) Display message (12-button mul-
tifunctio nsteering wheel) ..............258
Display message (4-button multi-
function steering wheel) ................252
PRE-SAFE ®
(preventive occupant
safety system) Operation ........................................ .51
PRE-SAFE ®
Brake (vehicles with
DISTRONIC PLUS) Function/notes ................................ 78
PRE-SAFE ®
Brake (vehicles with
DISTRONIC PLUS) Display message (12-button mul-
tifunction steering wheel) ..............259
Switching on/off ........................... 237
Warning lamp ................................. 300 Preventive occupant safety sys-
tem
see PRE-SAFE ®
(preventive occu-
pant safety system)
Program selector button ..................163
Pulling away Automatic transmission .................156
Manual transmission ..................... .155 Q
Qualifie dspecialis tworkshop ...........28 R
RACE START (AMG vehicles) .............194
RACETIMER (on-board computer) ....245
Radar sensor system Activating/deactivating .................242
Country overview ........................... 389
Display message (12-button mul-
tifunctio nsteering wheel) ..............274
Radiator cover ................................... 323
Radio Selecting a station (12-button
multifunctio nsteering wheel) ........233
see separate operating instructions
Rain closing feature
Panorama sliding sunroo f.............. 101
Sliding sunroo f............................... 100
Range (fuel)
Displaying (12-button multifunc-
tion steering wheel )....................... 231
Displaying (4-button multifunc-
tion steering wheel) .......................226
Reading lamp ..................................... 124
Rear bench seat Folding the backres tforwards/
back ............................................... 305
Rear compartment
Setting the airflow .........................139
Setting the airv ents...................... 148
Rear-compartment seat belt sta-
tus indicator ........................................ 5618
Index

Windows
Cleaning ......................................... 329
see Side windows
Windscreen
Demisting ...................................... 140
Windscreen washe rsystem ............. 325
Windscreen wipers Problem (malfunction) ...................132
Rea rwindow wiper ........................ 130
Replacing the wiper blades ............130
Switching on/off ........................... 129
Winter operation
Important safety notes ..................359
Radiator cover ............................... 323
Slippery road surfaces ...................178
Snow chains .................................. 360
Winter tyres
Limiting the speed (on-board com-
puter) ............................................. 241
M+S tyres ...................................... 360
Wiper blades
Cleaning ......................................... 329
Important safety notes ..................130
Replacing (on the rear window) .....131
Replacing (windscreen) ..................131
Wooden trim (cleaning instruc-
tions) .................................................. 332 Index
25

Problem Possible causes/consequences and
M Solutions
Vehicles with a petrol
engine:
The engine is not run-
ning smoothly and is
misfiring. There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
X
Only depress the accelerator pedal slightly.
X Have the cause rectified immediately at a qualified specialist
workshop, e.g. a Mercedes-Benz Service Centre.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it. The coolant tempera-
ture display is showing
more than 120 †. The
coolant warning lamp
may also be lit and a
warning tone may
sound. The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X
Stop as soon as possible and allow the engine and the coolant
to cool down.
X Check the coolant level (Y page 324). Observe the warning
notes as you do so and top up the coolant if necessary. If the coolant level is correct, the engine radiator fan may be faulty.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
At coolant temperatures under 120 †, drive on to the nearest
qualified specialist workshop, e.g. to a Mercedes-Benz Service
Centre.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-start traffic. Manual transmission
Important safety notes
G
WARNING
The movement of the pedals must not be
impaired in any way. Do not keep any objects
in the driver's footwell. Make sure that floor-
mats or carpets are correctly secured and
that there is sufficient clearance for the ped-
als.
Do not place several floormats on top of one
another. G
WARNING
Do not change down for additional engine
braking on a slippery road surface. This could
cause the drive wheels to lose their grip and
the vehicle could skid. This could cause you to lose control of your vehicle and cause an
accident.
Gear lever
Gear lever
!
Only engage gear when the clutch pedal
is depressed. 160
Manual transmissionDriving and parking

style to suit the prevailing road and weather
conditions. Always pay attention to traffic
conditions and your surroundings. Otherwise,
you may fail to recognise dangers in time,
cause an accident and injure yourselfa
nd oth-
ers.
The rada rsensor system is automatically
deactivated near radio telescope facilities
(Y page 389).
For Active Blind Spot Assist to assist you
when driving, the radar sensor system must
be activated (Y page 242) and operational.
Monitoring range
Active Blind Spot Assist monitors the area up
to three metres behind your vehicle and
directly nextt o your vehicle as shown in the
diagram. For this purpose, Active Blind Spot
Assist uses radar sensors in the rear bumper. Example: Saloon
G
WARNING
Active Blind Spot Assist monitors certain
areas in the immediate vicinity of your vehicle.
Vehicles that approach and drive past at high
speeds are not detected. No visual nor audi-
ble warnings are emitted and the system does
not brake the vehicle to correct your course.
If the lanes are very wide, it may not be pos-
sible to monitor the complete width of the neighbouring lane. For this reason, vehicles in
the next lane may not be detected, especially
if they are driving in a staggered formation.
This may be the case if vehicles are driving at
the edge of their lane that is furthest away
from your vehicle.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others.
If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may
be indicated, especially if the vehicles are not
driving in the middle of their lane. This may
be the case if there are vehicles at the edge
of their lane nearest your vehicle.
Due to the nature of the system:
R warnings may be issued in error when driv-
ing close to crash barriers or similar solid
lane borders.
R warnings may be interrupted when driving
alongside long vehicles, such as lorries, for
a prolonged time.
Two Active Blind Spot Assist radar sensors
are integrated into the front and rear bumpers
respectively. An additional radar sensor is
located behind the cover in the radiator grille.
Make sure that the bumpers are free of dirt,
ice or slush around the sensors. The rear sen-
sors must not be covered, e.g. by bicycle
racks or overhanging loads. Following a
severe impact or in the event of damage to
the bumpers, have the function of the radar
sensors checked at a qualified specialist
workshop. Blind Spot Assist may otherwise
not work properly. 210
Driving systemsDriving and parking

Display messages Possible causes/consequences and
M Solutions
PRE-SAFE
Functions cur‐
rently limited See
Owner's Manual G
Risk of accident
PRE-SAFE ®
Brake is temporarily inoperative if:
R the DISTRONIC PLUS cover in the radiator grille is dirty.
R the sensors in the bumpers are dirty.
R its function is impaired due to heavy rain or snow.
R the rada rsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R you switch off ESP ®
(AMG vehicles only).
R the system is outside the operating temperature range.
R the on-board voltage is too low.
PRE-SAFE ®
Brake is operational again and the display message
disappears if:
R the dirt (e.g. slush) drops away while the vehicle is in motion.
R the system detects that the sensors are fully available again.
R you reactivate ESP ®
(AMG vehicles only).
R the system is within the operating temperature range.
If the display message continues to be displayed:
X Clean the DISTRONIC PLUS cover in the radiator grille
(Y page 330).
X Clean the bumpers (Y page 330).
X Restart the engine.
X Wait until the battery is sufficiently charged. PRE-SAFE
Functions limited
See Owner's Manual G
Risk of accident
PRE-SAFE ®
Brake is faulty. BASP LUS or the distance warning sig-
nal may also have failed.
X Visit a qualified specialist workshop. ü If the symbol appears in the multifunction display,
aseat belt
tongue has been clipped into a rear seat belt buckle.
For further information on the status indicator for the rear seat
belts: (Y page 56). Display messages
259On-board computer and displays Z

Engine (4-button multifunction steering wheel)
Display messages Possible causes/consequences and
M Solutions
Top up
coolant The coolant level is too low.
X
Top up the coolant, observing the warning notes when doing so
(Y page 324).
X If the coolant needs topping up more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop. ?
Stop vehicle Sw.
eng. Off The coolant is too hot.
Aw
arning tone also sounds.
X Stop the vehicle immediately, paying attentio ntoroad and traf-
fic conditions, and switch off the engine.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X Wait until the display message disappears before restarting the
engine. Otherwise, there is a risk of engine damage.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visit a qualified specialist
workshop immediately. The poly-V-belt may have torn.
X
Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Open the bonnet.
X Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
X Consult a qualified specialist workshop.
If the poly-V-belt is OK:
X Wait until the display message disappears before restarting the
engine. Otherwise, there is a risk of engine damage.
X Pay attention to the coolant temperature display.
X Visit a qualified specialist workshop. ? The fan motor is faulty.
X
If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-start traffic. 268
Display messagesOn-board computer and displays

Engine (12-button multifunction steering wheel)
Display messages Possible causes/consequences and
M Solutions
+
Top
up coolant See
Owner's Manual The coolant level is too low.
X
Top up the coolant, observing the warning notes when doing so
(Y page 324).
X If the coolant needs topping up more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop. ?
Coolant Stop vehi‐
cle Switch engine
off The coolant is too hot.
Aw
arning tone also sounds.
X Stop the vehicle immediately, paying attentio ntoroad and traf-
fic conditions, and switch off the engine.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X Wait until the display message disappears before restarting the
engine. Otherwise, there is a risk of engine damage.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visit a qualified specialist
workshop immediately. The poly-V-belt may have torn.
X
Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Open the bonnet.
X Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
X Consult a qualified specialist workshop.
If the poly-V-belt is OK:
X Wait until the display message disappears before restarting the
engine. Otherwise, there is a risk of engine damage.
X Pay attention to the coolant temperature display.
X Visit a qualified specialist workshop. ? The fan motor is faulty.
X
If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop-start traffic. 270
Display messagesOn-board computer and displays