2014 MERCEDES-BENZ C-CLASS SALOON coolant

R
you have switched on the turn signals. In
this event, the warnings are suppressed
for a certain period of time.
R a driving safety system intervenes, such
as ABS, BAS or ESP ®
.
R you accelerate hard, e.g. kickdown.
R you brake hard.
R you steer actively, e.g. swerve to avoid an
obstacle or change lane quickly.
R you cut the corner on a sharp bend.
In order that you are warned only when nec-
essary and in good time if you cross the lane marking, the system recognises certain con-
ditions and warns you accordingly.
The warning vibration occurs earlier if:
R you approach the outer lane marking on a
bend.
R the road has very wide lanes, e.g. a motor-
way.
R the system recognises solid lane markings.
The warning vibration occurs later if:
R the road has narrow lanes.
R you cut the corner on a bend.
Towing a trailer
If you couple up a trailer, make sure that you have correctly established the electrical con-
nection. This can be accomplished by check- ing the trailer lighting. Hybrid operation
Points to remember
General notes Hybrid technology combines a fuel efficient
internal combustion engine with a powerful
electric motor. The hybrid system automati-
cally selects the most efficient operating
mode for every driving situation. Drive the
vehicle in the usual manner.
To save fuel, the hybrid system switches off
the combustion engine as often as possible
during the journey when power output requirements are low. When power output
requirements are low, the electric motor pow-
ers the vehicle. When power output require-
ments are high, the combustion engine is
switched on, even during a journey. When the vehicle is stationary, the combustion engine
is usually switched off. Consequently, there is
usually no engine idling as with combustion
engine vehicles.
For pulling away and accelerating, the electric motor supports the internal combustion
engine using the power stored in the high-
voltage battery. In addition, the power is used
for partially electric driving, operation of the
electric coolant compressor and to support
the 12 V on-board electrical system. In this
way the hybrid drive helps to reduce your
vehicle's fuel consumption.
Observe the driving tips on hybrid operation
(Y page 278).
RBS (Recuperative Brake System) If you release the accelerator pedal when the
vehicle is in motion, overrun recuperation is
initiated. The electric motor is operated as a
generator when in overrun mode and when
you brake. Hybrid technology converts the
kinetic energy of the vehicle into electricity
and stores it in the high-voltage battery. Important safety notes
All of the vehicle's systems remain active, if: R the vehicle is stationary,
R the combustion engine is switched off and
R the READY-indicator in the instrument clus-
ter is lit.
If you remove your foot from the brake pedal
while in transmission position D or R, the
vehicle could pull away automatically.
Observe the notes on the READY display of
the ECO start/stop function (Y page 279).
Vehicles with an electric motor generate sig-
nificantly less noise than vehicles with inter-
nal combustion engines. As a result, in certain Hybrid operation
269Driving and parking Z

Instrument cluster
:
Charge level display for high-voltage battery (Y page 273)
; RBS warning lamp (Y page 362)
= Electric motor power display (Y page 272)Displays and operation
Coolant temperature display for a com- bustion engine You can call up the coolant temperature using
the on-board computer.
X Use Ñ on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Service
Servicemenu.
X Confirm by pressing aon the steering
wheel.
X Press the :or9 button to select
Coolant
Coolant. Electric motor power display The electric motor power display is on the
right-hand side of the instrument cluster.
The current charge level of the high-voltage
battery is shown as a percentage in charge
level display
A. 100% corresponds to the
highest possible charge level of the high-volt- age battery.
There are two further areas located to the left
and right of charge level display A:
R Area :to; (E-DRIVE): 272
Hybrid operationDriving and pa
rking

Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
R Cruise control activated (Y page 216):
The segments light up from the stored
speed to the maximum speed.
R Variable SPEEDTRONIC activated
(Y page 219):
The segments light up from the start of the
scale to the selected limit speed.
R DISTRONIC PLUS activated (Y page 222):
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. Rev counter
! Do not drive in the overrevving range.
Doing so will damage the engine.
The red band in the rev counter 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 the
freezing 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 295).
Changes in the outside temperature are dis-
played after a short delay. Coolant temperature gauge
G
WARNING
If you open the bonnet while the engine is
overheating or while there is a fire in the
engine compartment, you could come into
contact with hot gases or other leaking ser-
vice products. There is a danger of injury.
Allow an overheating engine to cool down
before opening the bonnet. If there is a fire in the engine compartment, leave the bonnet
closed and notify the fire brigade.
The analogue coolant temperature gauge is in
the instrument cluster on the right-hand side (Y page 34).
In the on-board computer in the Service Service
menu there is a digital coolant temperature
gauge (Y page 307).
Under normal operating conditions and with
the specified coolant level, the coolant tem-
perature may rise to 120 †.
At high outside temperatures and when driv-
ing uphill, the coolant temperature may rise
to the end of the scale. Displays and operation
293On-board computer and displays Z

Redialling
The on-board computer saves the last names
or numbers dialled in the redial memory.
X Use ò on the steering wheel to call up
the list of menus.
X Press :or9 on the steering wheel
to select the Telephone
Telephone menu.
X Confirm by pressing aon the steering
wheel.
X Press the 6button to switch to the
redial memory.
X Press the :or9 button to select the
desired name or number.
X Press the 6ora button to start dial-
ling.
or
X To exit the redial memory: press the
~ or% button. Assistance graphic menu
X
Use ò on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Assistance
Assistance
graphic
graphic menu.
X Confirm by pressing aon the steering
wheel.
The multifunction display shows the
DISTRONIC PLUS distance display in the
assistance graphic.
X Press :to display the ATTEN-
TION ASSIST assessment. The assistance graphic shows you the status
of and/or information from the following driv-ing systems or driving safety systems:
R DISTRONIC PLUS (Y page 228)
R Traffic Sign Assist (Y page 256)
R Distance warning function and autono-
mous braking system of COLLISION PRE-
VENTION ASSIST PLUS (Y page 308)
R PRE-SAFE ®
Brake (Y page 82)
R Blind Spot Assist (Y page 259) or Active
Blind Spot Assist (Y page 263)
R ATTENTION ASSIST (Y page 255)
R Lane Keeping Assist (Y page 261)or Active
Lane Keeping Assist (Y page 266) Service menu
Introduction In the
Service Service menu, you have the following
options:
R Calling up display messages in the mes-
sage memory (Y page 314)
R Restarting the tyre pressure loss warning
system (Y page 437)
R Checking the tyre pressure electronically
(Y page 434)
R Calling up the service due date
(Y page 395)
R Displaying the coolant temperature
(Y page 307)
R Displaying the AdBlue ®
level and range
(Y page 307) (BlueTEC vehicles only) 306
Menus and submenusOn-board computer and displays

Displaying the coolant temperature
The coolant temperature is also shown in the
instrument cluster in the rev counter.
Observe the notes on coolant temperature
(Y page 293).
X Use ò on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Service Servicemenu.
X Confirm by pressing aon the steering
wheel.
X Use : or9 to select the Coolant Coolant
submenu.
X Press ato confirm your selection.
The coolant temperature is shown in a bar
display.
Displaying AdBlue ®
level and range This menu is only available in BlueTEC vehi-
cles.
X Use ò on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Service
Service menu.
X Confirm by pressing aon the steering
wheel.
X Select the AdBlue AdBluesubmenu using :or
9.
X Press ato confirm your selection.
The range and AdBlue ®
level appear in a bar
graph in the multifunction display.
Observe the information and notes on "Refu- elling" (Y page 204). Settings menu
Introduction In the
Settings
Settings menu, you have the following
options:
R Changing assistance settings
(Y page 307)
R Changing head-up display settings
(Y page 310)
R Changing the light settings (Y page 311)
R Changing the instrument cluster settings
(Y page 312)
R Changing the vehicle settings
(Y page 313)
R Restoring the factory settings
(Y page 313)
Assistance submenu Deactivating/activating ESP
®
Observe the "Important safety notes" section
in the description of ESP ®
(Y page 80). G
WARNING
If you deactivate ESP ®
, ESP ®
no longer sta-
bilises the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP ®
in the situations descri-
bed in the following. Menus and submenus
307On-boardcompu ter and displays Z

Engine
Display messages
Possible causes/consequences and
M
MSolutions +
Top Top
up
upcoolant
coolant See
See
Owner’s Manual
Owner’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 Top up the coolant, observing the warning notes before doing so
(Y page 393).
X If the coolant needs topping up more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop. ? ? The fan motor is faulty.
X If the coolant temperature is below 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid putting the engine under heavy load as you do so, e.g.
driving in mountainous terrain and stop-start traffic. ?
Coolant Stop vehi‐ Coolant Stop vehi‐
cle Switch engine cle Switch engine
off off The coolant is too hot.
A warning tone also sounds.
G WARNING
Never drive with an overheated engine. Driving when your engine is overheated can cause some fluids which may have leaked into
the engine compartment to catch fire.
In addition, steam from an overheated engine can cause serious
burns, which can occur just by opening the bonnet.
There is a risk of injury.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Secure the vehicle to prevent it from rolling away (Y page 207).
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 frozen slush.
X Do not start the engine again until the display message goes out
and the coolant temperature is below 120 †. The engine may
otherwise 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 120 †. Display messages
333On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions 4
Check eng. oil Check eng. oil
lev. when next lev. when next
refuelling refuelling The engine oil level has dropped to the minimum level.
A warning tone also sounds.
X Check the engine oil level when next refuelling, at the latest
(Y page 392).
X If necessary, top up the engine oil (Y page 392).
X Have the engine checked at a qualified specialist workshop if the
engine oil needs topping up more often than usual.
! Avoid long journeys when there is too little coolant in the cool-
ing system. Otherwise the engine will be damaged.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.co m.4
Add Add
1
1litre
litre engine
engine
oil
oil when
when next
next refu‐
refu‐
elling
elling Display message only for AMG vehicles:
The engine oil level has dropped to the minimum level.
X Check the engine oil level when next refuelling, at the latest
(Y page 392).
X If necessary, top up the engine oil (Y page 392).
X Have the engine checked at a qualified specialist workshop if the
engine oil needs topping up more often than usual.
! Avoid long journeys when there is too little coolant in the cool-
ing system. Otherwise the engine will be damaged.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.com. 4
Engine oil level Engine oil level
Stop vehicle Stop vehicle
Switch engine off Switch engine off The engine oil level is too low. There is a risk of engine damage.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Secure the vehicle to prevent it from rolling away (Y page 207).
X Check the engine oil level (Y page 392).
X If necessary, top up the engine oil (Y page 392).8
Reserve fuel level Reserve fuel level The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel level
drops into the reserve range.
X Refuel at the nearest filling station. C C There is very little fuel in the fuel tank.
The auxiliary heating cannot be operated.
X Refuel at the nearest filling station without fail. Display messages
335On-board computer and displays Z

Engine
Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions ;
N
The yellow engine diagnostics warning lamp lights up while the engine is
running.
There may be a fault, 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 petrol engines)
R in the fuel system
The emission limit values may be exceeded and the engine may be running in emergency mode.
X Have the vehicle checked as soon as possible at a qualified specialist work-
shop.
Vehicles with a diesel engine: the fuel tank has been run dry (Y page 203).
X Start the engine three to four times after refuelling.
If the yellow engine diagnostics warning lamp goes out, emergency running
mode is cancelled. The vehicle need not be checked. 8
N
The yellow reserve fuel warning lamp is on while the engine is running.
The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel level drops into the reserve range.
X Refuel at the nearest filling station. ?
N
The red coolant warning lamp lights up while the engine is running and the
coolant temperature gauge is at the start of the bar display.
The temperature sensor for the coolant temperature gauge is faulty.
The coolant temperature is no longer being monitored. There is a risk of engine
damage if the coolant temperature is too high.
X Stop the vehicle immediately, paying attention to road and traffic condi-
tions, and switch off the engine. Do not continue driving under any circum- stances.
X Secure the vehicle to prevent it from rolling away (Y page 207).
X Consult a qualified specialist workshop. 360
Warning and indicator lamps in the instrument clusterOn-board computer and displays