2015 MERCEDES-BENZ C-Class SEDAN coolant temperature

Children
In the vehicle .................................. .59
Restraint systems ............................ 61
Special seat belt retractor .............. .60
Child seat
Forward-facing restraint system ...... 64
LATCH-type (ISOFIX) child seat
anchors ............................................ 62
On the front-passenger seat ............ 63
Rearward-facing restraint system .... 64
Top Tether ...................................... .62
Cigarette lighter ................................ 309
Cleaning Mirror turn signal .......................... .334
Climate control
Automatic climate control (3-
zone) .............................................. 141
Controlling automatically .............. .144
Cooling with air dehumidification .. 143
Defrosting the windows ................. 148
Defrosting the windshield .............. 147
Dual-zone automatic climate con-
trol ................................................. 139
ECO start/stop function (3-zone
automatic climate control) ............. 142
ECO start/stop function (dual-
zone automatic climate control) .... 139
Important safety notes .................. 138
Indicator lamp ................................ 144
Information about using auto-
matic climate control ..................... 142
Information about using dual-zone
automatic climate control .............. 139
Ionization ....................................... 152
Overview of systems ..................... .138
Perfume atomizer .......................... 150
Problems with cooling with air
dehumidification ............................ 144
Problem with the rear window
defroster ........................................ 149
Rear control panel ......................... 141
Refrigerant ..................................... 402
Refrigerant filling capacity ............. 403
Setting the air distribution ............. 146
Setting the airflow ......................... 146
Setting the air vents ..................... .152
Setting the climate mode .............. .145 Setting the temperature ................ 145
Switching air-recirculation mode
on/off ............................................ 149
Switching on/off ........................... 142
Switching residual heat on/off ...... 149
Switching the rear window
defroster on/off ............................ 148
Switching the synchronization
function on and off ........................ 147
Climate control system
Automatic engine start .................. 161
Automatic engine switch-off .......... 161
Climate control (3-zone automaticclimate control) ............................ .142
Deactivating/activating ................. 162
Important safety notes .................. 161
Introduction ................................... 161
Cockpit
Overview .......................................... 32
COLLISION PREVENTION ASSIST
PLUS
Activating/deactivating ................. 245
Display message ............................ 258
Operation/notes .............................. 69
COMAND display
Cleaning ......................................... 336
Combination switch .......................... 126
Consumption statistics (on-board
computer) .......................................... 237
Convenience box ............................... 304
Convenience closing feature .............. 99
Convenience opening feature ............ 98
Coolant (engine) Checking the level ......................... 327
Display message ............................ 267
Filling capacity ............................... 402
Important safety notes .................. 401
Temperature display in the instru-
ment cluster .................................. 231
Temperature display in the on-
board computer ............................ .244
Warning lamp ................................. 291
Cooling
see Climate control
Copyright ............................................. 29 Index
7

Stowage well beneath the trunk
floor
....................................................3 05
Summer tires In winter ........................................ 360
Sun visor ............................................ 307
Suspension tuning AIRMATIC ...................................... 198
Switching air-recirculation mode
on/off ................................................. 149 T
Tachometer ........................................ 231
Tail lamps Display message ............................ 265
see Lights
Tank content
Fuel gauge ....................................... 33
Technical data
Capacities ...................................... 397
Information ................................... .396
Tires/wheels ................................. 386
Vehicle data ................................... 403
Telephone
Accepting a call (multifunction
steering wheel) .............................. 242
Display message ............................ 282
Introduction ................................... 242
Menu (on-board computer) ............ 242
Number from the phone book ....... .243
Redialing ........................................ 243
Rejecting/ending a call ................. 242
Temperature
Coolant (display in the instrumentcluster) .......................................... 231
Coolant (display in the on-board
computer) ...................................... 244
Outside temperature ..................... .231
Setting (climate control) ................ 145
Through-loading feature ................... 301
TIREFIT kit .......................................... 342
Tire pressure Calling up (on-board computer) ..... 365
Checking manually ........................ 365
Display message ............................ 277
Important safety notes .................. 365
Maximum ....................................... 364 Notes ............................................. 363
Not reached (TIREFIT) .................... 344
Reached (TIREFIT) .......................... 344
Recommended ............................... 361
Tire pressure loss warning sys-
tem
General notes ................................ 368
Important safety notes .................. 368
Restarting ...................................... 369
Tire pressure monitor
Checking the tire pressure elec-
tronically ........................................ 367
Function/notes ............................ .365
General notes ................................ 365
Important safety notes .................. 365
Radio type approval for the tire
pressure monitor ........................... 368
Restarting ...................................... 367
Warning lamp ................................. 294
Warning message .......................... 367
Tires
Aspect ratio (definition) ................. 380
Average weight of the vehicle
occupants (definition) .................... 379
Bar (definition) ............................... 378
Changing a wheel .......................... 381
Characteristics .............................. 378
Checking ........................................ 359
Curb weight (definition) ................. 380
Definition of terms ......................... 378
Direction of rotatio n...................... 381
Display message ............................ 277
Distribution of the vehicle occu-
pants (definition) ............................ 381
DOT, Tire Identification Number
(TIN) ............................................... 378
DOT (Department of Transporta-
tion) (definition) ............................. 379
GAWR (Gross Axle Weight Rating)
(definition) ..................................... 379
GVW (Gross Vehicle Weight) (def-
inition) ........................................... 379
GVWR (Gross Vehicle Weight Rat-
ing) (definition) .............................. 379
Important safety notes .................. 358
Increased vehicle weight due to
optional equipment (definition) ...... 379
Kilopascal (kPa) (definition) ........... 379 18
Index

Instrument cluster
Displays
Function Page
0043
Speedometer
0044
Multifunction display 233
0087
Tachometer 231 Function Page
0085
Coolant temperature dis-
play
231
0083
Fuel gauge Instrument cluster
33At a glance

Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
R Cruise control activated (Y page 183):
The segments light up from the stored
speed to the maximum speed.
R DISTRONIC PLUS activated (Y page 185):
One or two segments in the set speed
range light up.
R DISTRONIC PLUS detects a vehicle in front:
The segments between the speed of the
vehicle in front and the stored speed light
up. Tachometer
! Do not drive in the overrevving range, as
this could damage the engine.
The red band in the tachometer indicates the
engine's overrevving range.
The fuel supply is interrupted to protect the
engine when the red band is reached. Outside temperature display
You should pay special attention to road con-
ditions when temperatures are around freez-
ing point.
Bear in mind that the outside temperature
display indicates the temperature measured
and does not record the road temperature.
The outside temperature display is in the mul- tifunction display (Y page 233).
Changes in the outside temperature are dis-
played after a short delay. Coolant temperature display
G
WARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
! A display message is shown if the coolant
temperature is too high.
If the coolant temperature is over 248 ‡
(120 †), do not continue driving. The
engine will otherwise be damaged.
The analog coolant temperature gauge is in
the instrument cluster on the right-hand side
(Y page 33).
In the on-board computer in the Service Service
menu there is a digital coolant temperature
gauge (Y page 244).
Under normal operating conditions and with
the specified coolant level, the coolant tem-
perature may rise to 248 ‡ (120 †). Operating the on-board computer
0043
Multifunction display
0044 Right control panel
0087 Left control panel Displays and operation
231On-board computer and displays Z

R
ATTENTION ASSIST (Y page 216)
R Lane Keeping Assist (Y page 219)or Active
Lane Keeping Assist (Y page 224)Maintenance menu
Introduction In the
Service
Service menu, you have the following
options:
R Calling up display messages in message
memory (Y page 250)
R Checking the tire pressure electronically
(Y page 367)
R Calling up the service due date
(Y page 329)
R Displaying the coolant temperature
(Y page 244)
Displaying the coolant temperature The coolant temperature is also shown in the
instrument cluster in the tachometer.
Observe the notes on coolant temperature
(Y page 231).
X Use 00E2 on the steering wheel to call up
the list of menus.
X Press the 0064or0063 button on the steer-
ing wheel to select the Service
Service menu.
X Confirm by pressing 0076on the steering
wheel. X
Use 0064 or0063 to select the Coolant Coolant
submenu.
X Press 0076to confirm your selection.
The coolant temperature is shown in a bar
display. Settings menu
Introduction In the
Settings Settings menu, you have the following
options:
R Changing assistance settings
(Y page 244)
R Changing head-up display settings
(Y page 246)
R Changing the light settings (Y page 247)
R Changing the instrument cluster settings
(Y page 248)
R Restoring the factory settings
(Y page 249)
Assistance submenu Deactivating/activating ESP
®
Observe the "Important safety notes" section in the description of ESP (Y page 72). G
WARNING
If you deactivate ESP ®
, ESP ®
no longer sta-
bilizes the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP ®
in the situations descri-
bed in the following. 244
Menus and submenusOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions 0049
Switch Off Lights Switch Off Lights The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X Turn the light switch to 0058.Adaptive Highbeam Adaptive Highbeam
Assist Inoperative Assist Inoperative Adaptive Highbeam Assist is faulty.
X
Visit a qualified specialist workshop. Adaptive Highbeam Adaptive Highbeam
Assist Currently Assist Currently
Unavailable See Unavailable See
Operator's Manual Operator's Manual Adaptive Highbeam Assist is deactivated and temporarily inoper-
ative. Possible causes are:
R the windshield in the camera's field of vision is dirty.
R visibility is impaired due to heavy rain, snow or fog.
X Clean the windshield.
If the system detects that the camera is fully operational, display
message Adaptive Highbeam Assist Now Available Adaptive Highbeam Assist Now Available is dis-
played.
Adaptive Highbeam Assist is operational again. Engine
Display messages
Possible causes/consequences and
0050
0050Solutions 00BD
Check Coolant Check Coolant
Level See Opera‐ Level See Opera‐
tor's Manual tor's Manual The coolant level is too low.
! Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Add coolant, observing the warning notes before doing so
(Y page 327).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop. 00AC 00AC The fan motor is faulty.
X At coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in moun-
tainous terrain, and stop-and-go traffic. Display
messages
267On-board computer and displays Z

Display messages
Possible causes/consequences and
0050
0050Solutions 00AC
Coolant Too Hot Coolant Too Hot
Stop Vehicle Turn Stop Vehicle Turn
Engine Off Engine Off The coolant is too hot.
A warning tone also sounds.
G WARNING
Do not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catch fire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 174).
X Wait until the engine has cooled down.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Do not start the engine again until the display message goes out
and the coolant temperature is below 248 ‡ (120 †). Other-
wise, the engine could be damaged.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 248 ‡ (120 †). 003D
See See
Operator's
Operator's Man‐
Man‐
ual
ual The battery is not being charged.
A warning tone also sounds.
Possible causes are:
R a defective alternator
R a torn poly-V-belt
R a malfunction in the electronics
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
! Do not continue driving. The engine could otherwise overheat.
X Secure the vehicle against rolling away (Y page 174).
X Consult a qualified specialist workshop. 268
Display
messagesOn-board computer and displays

Engine
Warning/
indicator
lamp
0051 0051
Signal type
Possible causes/consequences and 0050
0050Solutions 00B9
0051
The yellow Check Engine warning lamp lights up while the engine is running.
There may be a malfunction, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignition system (for vehicles with gasoline engines)
R in the fuel system
The emission limit values may be exceeded and the engine may be in emer-
gency mode.
X Have the vehicle checked as soon as possible at a qualified specialist work-
shop.
In some states, you must immediately visit a qualified specialist workshop as
soon as the yellow Check Engine warning lamp lights up. This is due to the legal
requirements in effect in these states. If in doubt, check whether such legal
regulations apply in the state in which you are currently driving. 00B6
0051
The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel level has dropped into the reserve range.
X Refuel at the nearest gas station. 00B6
0051
The yellow reserve fuel warning lamp flashes while the vehicle is in motion.
In addition, the 00B9Check Engine warning lamp may light up.
The fuel system pressure is too low. The fuel filler cap is not closed correctly or the fuel system is leaking.
X Check that the fuel filler cap is correctly closed.
X If the fuel filler cap is not correctly closed: close the fuel filler cap.
X If the fuel filler cap is closed: visit a qualified specialist workshop.00AC
0051
The red coolant warning lamp lights up while the engine is running and the
coolant temperature gage is at the start of the bar display.
The temperature sensor for the coolant temperature gage is defective.
The coolant temperature is no longer being monitored. There is a risk of engine
damage if the coolant temperature is too high.
X Pull over and stop the vehicle safely and switch off the engine, paying
attention to road and traffic conditions. Do not continue driving under any
circumstances.
X Secure the vehicle against rolling away (Y page 174).
X Consult a qualified specialist workshop. Warning and indicator lamps in the instrument cluster
291On-board computer and displays Z