2016 MERCEDES-BENZ C CLASS fuel

Problems with the transmission Problem
Possible causes/consequences and P Solutions
The transmission has
problems shifting gear. The transmission is losing oil. X
Have the transmission checked at a qualified specialist workshop
immediately.
The acceleration ability
is deteriorating.
The transmission no lon-
ger changes gear. The transmission is in emergency mode.
It is only possible to shift into second gear and reverse gear.X
Stop the vehicle. X
Shift the transmission to position P .X
Switch off the engine. X
Wait at least ten seconds before restarting the engine. X
Shift the transmission to position D or R .
If D is selected, the transmission shifts into second gear; if R is
selected, the transmission shifts into reverse gear. X
Have the transmission checked at a qualified specialist workshop
immediately.
Problems with PLUG-IN HYBRID operation ( Y
page 233).
Transfer case This section is only valid for vehicles with 4-
wheel drive (4MATIC). Power is always trans-
mitted to both axles.
! Performance tests may only be carried out
on a 2-axle dynamometer. The brake system
or transfer case could otherwise be damaged.
Contact a qualified specialist workshop for a
performance test.
! Since ESP ®
engages automatically, the igni-
tion must be switched off (the SmartKey or
Start/Stop button must be in position 0 or 1 )
if: R
the electric parking brake is being tested
on a brake dynamometer R
the vehicle is being towed with only one
axle raised (not permitted for vehicles with
4MATIC).
The brake system could otherwise be dam-
aged.
! Vehicles with 4MATIC must not be towed
with either the front or the rear axle raised, as
doing so will damage the transmission. Refueling
Important safety notes
G WARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is a risk of fire and explo-
sion.
You must avoid fire, open flames, creating
sparks and smoking. Switch off the engine
and, if applicable, the auxiliary heating before
refueling.
G WARNING
Fuel is poisonous and hazardous to health.
There is a risk of injury.
You must make sure that fuel does not come
into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.164
Refueling
Driving and parking

If you or others come into contact with fuel,
observe the following: R
Wash away fuel from skin immediately
using soap and water. R
If fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance with-
out delay. R
If fuel is swallowed, seek medical assis-
tance without delay. Do not induce vomit-
ing. R
Immediately change out of clothing which
has come into contact with fuel.
G WARNING
Electrostatic buildup can create sparks and
ignite fuel vapors. There is a risk of fire and
explosion.
Always touch the vehicle body before opening
the fuel filler flap or touching the fuel pump
nozzle. Any existing electrostatic buildup is
thereby discharged.
Do not get into the vehicle again during the refu-
eling process. Otherwise, electrostatic charge
could build up again.
! Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the ignition
if you accidentally refuel with the wrong fuel.
Otherwise, the fuel will enter the fuel system.
Even small amounts of the wrong fuel could
result in damage to the fuel system and the
engine. Notify a qualified specialist workshop
and have the fuel tank and fuel lines drained
completely.
! Overfilling the fuel tank could damage the
fuel system.
! Take care not to spill any fuel on painted
surfaces. You could otherwise damage the
paintwork.
! Use a filter when refueling from a fuel can.
Otherwise, the fuel lines and/or injection sys-
tem could be blocked by particles from the
fuel can.
If you overfill the fuel tank, fuel could spray out
when the fuel pump nozzle is removed. i Flexible Fuel vehicles can be recognized by
the Ethanol up to E85 sticker on the inside of
the fuel filler flap.
For further information on fuel and fuel quality
( Y
page 388).
Refueling
General information Pay attention to the important safety notes
( Y
page 164).
PLUG-IN HYBRID vehicles: pressure in the fuel
tank must be released before refueling.
Except PLUG-IN HYBRID vehicles: if you
unlock/lock the vehicle from the outside, the
fuel filler flap also unlocks/locks.
The position of the fuel filler cap is displayed

Problems with fuel and the fuel tank Problem
Possible causes/consequences and P Solutions
Fuel is leaking from the
vehicle.
G WARNING
The fuel line or the fuel tank is faulty.
Risk of explosion or fire. X
Apply the electric parking brake. X
Switch off the engine. X
Remove the SmartKey from the ignition lock.
or, in vehicles with KEYLESS-GO start-function or KEYLESS ‑ GOX
Open the driver's door.
The on-board electronics now have status 0 . This is the same as the
SmartKey having been removed. X
Do not restart the engine under any circumstances. X
Consult a qualified specialist workshop.
The fuel filler flap cannot
be opened. The fuel filler flap is not unlocked. X
Unlock the vehicle ( Y
page 81).X
PLUG-IN HYBRID Vehicles: depressurize the fuel tank
( Y
page 165).
The SmartKey battery is discharged or nearly discharged. X
Unlock the vehicle using the mechanical key ( Y
page 83).
The fuel filler flap is unlocked, but the opening mechanism is jammed. X
Consult a qualified specialist workshop.
Charging the high-voltage battery
(PLUG-IN HYBRID vehicles)
Important safety notes
G DANGER
The vehicle's high-voltage electrical system is
under high voltage. If you modify components
in the vehicle's high-voltage electrical system
or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Following an accident, do not touch any high-
voltage components and never modify the
vehicle's high-voltage electrical system. Have
the vehicle towed away after an accident and the vehicle's high-voltage electrical system
checked by a qualified specialist workshop.
G WARNING
In the event of a vehicle fire, the internal pres-
sure of the high-voltage battery can exceed a
critical value. In this case flammable gas
escapes through a ventilation valve on the
underbody. The gas can ignite. There is a risk
of injury.
Leave the danger zone immediately. Secure
the danger area at a suitable distance, whilst
observing legal requirements.
G DANGER
If you use incorrectly installed mains sockets
or adapters, extension cables or similar to
connect the charging cable to a mains socket,168
Charging the high-voltage battery (PLUG-IN HYBRID vehicles)
Driving and parking

for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving.
G WARNING
If you operate mobile communication equip-
ment while driving, you will be distracted from
traffic conditions. You could also lose control
of the vehicle. There is a risk of an accident.
Only operate this equipment when the vehicle
is stationary.
Observe the legal requirements for the country
in which you are driving. Some jurisdictions pro-
hibit the driver from using a mobile phone while
driving a vehicle.
If you make a call while driving, always use
hands-free mode. Only operate the telephone
when the traffic situation permits. If you are
unsure, pull over to a safe location and stop
before operating the telephone.
Bear in mind that at a speed of only 30 mph
(approximately 50 km/h), the vehicle covers a
distance of 44 ft (approximately 14 m) per sec-
ond.
Drive sensibly – save fuel Observe the following tips to save fuel: X
The tires should always be inflated to the rec-
ommended tire pressure. X
Remove unnecessary loads. X
Remove roof racks when they are not needed. X
Warm up the engine at low engine speeds. X
Avoid frequent acceleration or braking. X
Have all maintenance work carried out as
indicated by the service intervals in the Main-
tenance Booklet or by the service interval dis-
play.
Fuel consumption also increases when driving in
cold weather, in stop-start traffic and in hilly ter-
rain. Drinking and driving
G WARNING
Drinking and driving and/or taking drugs and
driving are very dangerous combinations.
Even a small amount of alcohol or drugs can
affect your reflexes, perceptions and judg-
ment.
The possibility of a serious or even fatal acci-
dent is greatly increased when you drink or
take drugs and drive.
Do not drink or take drugs and drive or allow
anyone to drive who has been drinking or tak-
ing drugs.
Emission control
G WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.
Certain engine systems are designed to keep
the level of poisonous components in exhaust
fumes within legal limits.
These systems only work at peak efficiency if
they are serviced exactly in accordance with the
manufacturer's specifications. Always have
work on the engine carried out at a qualified
specialist workshop. Mercedes-Benz recom-
mends that you use an authorized Mercedes-
Benz Center for this purpose. In particular, work
relevant to safety or on safety-related systems
must be carried out at a qualified specialist
workshop.
The engine settings must not be changed under
any circumstances. Furthermore, all specific
service work must be carried out at regular
intervals and in accordance with the Mercedes-
Benz service requirements. Details can be found
in the Maintenance Booklet.
ECO display
The ECO display shows you how economical
your driving style is. The ECO display assists you
in achieving the most economical driving style180
Driving tips
Driving and parking

R
the vehicle is stationary and the brake pedal is
depressed (left foot). R
the transmission is in position D .
Activating RACE START
i When manual mode ( Y
page 161) is active,
the transmission automatically shifts up to
RACE START in the drive program. This func-
tion supports maximum acceleration with
RACE START. After going through an acceler-
ating process once from a stationary position,
this function is automatically deactivated. X
Depress the brake pedal with your left foot
and keep it depressed. X
Pull and hold both steering wheel paddle shift-
ers ( Y
page 161).
The RACE START Confirm: Paddle UP
Cancel: Paddle DOWN message appears in
the multifunction display. X
Release both steering wheel paddle shifters
( Y
page 161).
i If the activation conditions are no longer ful-
filled, RACE START is canceled. The RACE
START Canceled message appears in the
multifunction display. X
To cancel: pull the left steering wheel paddle
shifter ( Y
page 161).
or X
To confirm: pull the right steering wheel pad-
dle shifter ( Y
page 161).
The RACE START Available Depress gas
pedal. message appears in the multifunction
display.
i If you do not depress the accelerator pedal
fully within two seconds, RACE START is can-
celed. The RACE START Not Possible See
Operator's Manual message appears in the
multifunction display. X
Fully depress the accelerator pedal.
The engine speed rises to approximately
3,500 rpm.
The RACE START Release brake to start
message appears in the multifunction display.
i If you do not release the brake pedal within
five seconds, RACE START is canceled. The RACE START Canceled message appears in
the multifunction display. X
Take your foot off the brake, but keep the
accelerator pedal depressed.
The vehicle pulls away at maximum acceler-
ation.
The RACE START Active message appears in
the multifunction display.
RACE START is deactivated when the vehicle
reaches a speed of approximately 30 mph (Can-
ada: 50 km/h).
RACE START is deactivated immediately if you
release the accelerator pedal during RACE
START or if any of the activation conditions are
no longer fulfilled. The RACE START Not Pos‐
sible See Operator's Manual or RACE
START Canceled message appears in the mul-
tifunction display.
i If RACE START is used repeatedly within a
short period of time, it is only available again
after the vehicle has been driven a certain
distance.
AIRMATIC
General notes AIRMATIC is an air suspension with variable
damping for improved driving comfort. All-round
level control ensures the best possible suspen-
sion and constant ground clearance, even with a
laden vehicle. When you drive fast, the vehicle is
lowered automatically to improve driving safety
and to reduce fuel consumption. There is also
the option to manually adjust the vehicle level.
AIRMATIC consists of level setting, level control
and the Adaptive Damping System ADS.
Important safety notes
G WARNING
When the vehicle is being lowered, people
could become trapped if their limbs are
between the vehicle body and the wheels or
underneath the vehicle. There is a risk of
injury.
Make sure no one is underneath the vehicle or
in the immediate vicinity of the wheel arches
when the vehicle is being lowered.196
Driving system s
Dr ivi ng an d parking

R
you hav e adopte d a sport y drivin g style wit h
high cornering speeds or high rates of accel-
eration .R
ES P ®
is switched off .R
th e transmission is no t in position D .R
a loss of tire pressur e or a defective tire has
been detecte d and displayed.R
an obstacle in th e lan e in whic h you are drivin g
has been detected.
Active Lan e Keepin g Assis t may no t detec t other
roa d user s or traffic situations. An inappropriat e
brak e application may be interrupted at any time
if you: R
steer slightly in th e opposit e directionR
switch on th e tur n signalR
clearly brak e or accelerate
A lane-correcting brak e application is interrup-
te d automatically if: R
a drivin g safet y system intervenes, e.g. ES P ®
,
PRE-SAF E ®
Brake or Active Blind Spot Assist.R
lan e marking s can no longer be recognized.
Activating/deactivating Active Lan e
Keeping Assis t
X
To activate: press butto n D .
Indicato r lamp C lights up. The Lan e Keep‐
ing Assist On message appears in th e mul-
tifunction display. If all condition s hav e been
satisfied, a warnin g or steerin g intervention
may be made .
If you drive at speeds abov e 40 mph
(60 km/h) and lan e marking s are detected,
th e lines in th e assistanc e graphic s display
( Y
page 246) are shown in green . Active Lan e
Keepin g Assis t is read y for use.X
To deactivate: press butto n D .
Indicato r lamp C goe s out . The Active Lan e
Keepin g Assis t is deactivated. The Lan e Keepin g Assist Off message appears in
th e multifunction display.
Selecting Standar d or Adaptive setting X
In th e DriveAssist men u on th e on-boar d
computer, select th e Active Lan e Keep‐
ing Assist function ( Y
page 248).X
Selec t Standard or Adaptive .
Whe n Standard is selected, no warnin g vibra-
tion occur s if: R
you switch on th e tur n signals. In this event ,
th e warnings are suppressed for a certain
period of time. R
a drivin g safet y system intervenes, suc h as
ABS, BA S or ES P ®
.
Whe n Adaptive
is selected, no warnin g vibra-
tion occur s if: R
you switch on th e tur n signals. In this event ,
th e warnings are suppressed for a certain
period of time. R
a drivin g safet y system intervenes, e.g.
ABS, BA S or ES P ®
.R
you accelerate hard, e.g. kickdown .R
you brak e hard. R
you steer actively, e.g. swerve to avoid an
obstacle or chang e lanes quickly.R
you cut th e corner on a shar p bend.
In order that you are warned only when neces-
sar y and in goo d time if you cross th e lan e mark-
ing, th e system recognizes certain condition s
and warn s you accordingly.
The warnin g vibration occur s earlier if:R
you approac h th e outer lan e marking on a
bend. R
th e roa d has ver y wide lanes, e.g. a highway.R
th e system recognizes soli d lan e markings.
The warnin g vibration occur s later if:R
th e roa d has narrow lanes. R
you cut th e corner on a bend.
PLUG ‑ IN HYBRID operation
Points to rememb er
Gene ra l notes
Hybrid technology combine s a fuel efficien t
internal combustion engin e wit h a powerful
electric motor. In HYBRID mode, th e hybrid224
PLUG ‑ IN HYBRID operation
Driving and parking

drive system automatically selects the most effi-
cient operating mode for every driving situation.
Drive the vehicle in the usual manner.
To save fuel in HYBRID mode, the hybrid drive
system switches off the combustion engine as
often as possible during the journey when power
output requirements are low. When power out-
put requirements are low, the electric motor
powers the vehicle. When power output require-
ments are high, the combustion engine is auto-
matically switched on. The engine is usually
switched off when the vehicle is stationary. Con-
sequently, 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 bat-
tery. 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
system helps to reduce your vehicle's fuel con-
sumption.
Observe the driving tips on plug-in hybrid oper-
ation ( Y
page 230).
Recuperative Brake System If you release the accelerator pedal when the
vehicle is in motion, overrun recuperation is ini-
tiated. The electric motor is operated as a gen-
erator 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.
Observe the important safety notes for the
Recuperative Brake System ( Y
page 45).
Important safety notes If the engine is switched off by the ECO start/
stop function and you open the driver's door: R
a message appears in the multifunction dis-
play and R
a warning tone sounds
Further information ( Y
page 272).
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 cluster
lights up If you remove your foot from the brake pedal
while in transmission position D or R, the vehicle
may pull away automatically.
Observe the notes on the READY display of the
ECO start/stop function ( Y
page 231).
Vehicles with an electric motor generate much
less driving noise than vehicles with internal
combustion engines. As a result, your vehicle
may not be heard by other road users in certain
situations. This is the case, for example, when
you are parking and your vehicle is not seen by
other road users.
This requires you to adopt a particularly antici-
patory driving style, as it is necessary to allow
for the possibility that other road users may
behave erratically.
Displays and operation
Electric motor performance display
The power display for the electric motor is loca-
ted on the right-hand side of the instrument
cluster. R
Area C to D (E-DRIVE):
This shows the electric output from the elec-
tric motor, e.g. during electric operation or in
boost mode.
When the motor is switched on, the display is
at limit C . With increasing pressure on the
accelerator pedal the display fills up from C
to D .
Driving with the electric motor: when the
display reaches limit D , the combustion
engine is switched on. If the display is
approaching limit D and you remove your
foot from the accelerator pedal, the display
empties again. The combustion engine is not
switched on. At low speeds, you can therebyPLUG ‑ IN HYBRID operation 225
Driving and parking Z

E-SAVE R
Electric mode or driving
with the internal combus-
tion engine is possible R
Automatic selection of
drive mode with electric
mode as often as possi-
ble R
The current condition of
charge of the high-volt-
age battery is maintained
so the electrical energy
can be used at a later
time
CHARGE R
Electric drive is not pos-
sible R
Charging the high-volt-
age battery while driving
using the combustion
engine
In automatic drive program S ( Y
page 229) and
during manual gearshifting ( Y
page 229), only
HYBRID operating mode is available.
If you switch from automatic drive program S to
automatic drive program E , HYBRID operating
mode continues to be selected.
If manual drive program M is deactivated, the
automatic transmission shifts: R
into the automatic drive program that was last
selected R
into the driving mode that was last selected
Each time the engine is started, HYBRID mode
is automatically selected.
Operating the on-board computer You can display the current operating condition
of the hybrid drive system in the multifunction
display and on the display of the multimedia
system ( Y
page 227).
In the multimedia system display, you can also
call up a graphic display of the fuel consumption
and generated electricity ( Y
page 228). Menus and submenus
Selecting displays in the display of the
multimedia system X
Press the