2015 MERCEDES-BENZ GLC SUV engine

Opening the fuel filler flap
:
To open the fuel filler flap
; To insert the fuel filler cap
= Tyre pressure table
? Instruction label on the fuel type to be
refuelled
X Switch off the engine.
X Remove the key from the ignition lock.
or, on vehicles with KEYLESS-GO start func-
tion or KEYLESS‑ GO:
X Open the driver's door.
The on-board electronics now have status
0. This is the same as the key having been
removed.
X Press the fuel filler flap in the direction of
arrow :.
The fuel filler flap swings up.
X Turn the fuel filler cap anti-clockwise and
remove it.
X Insert the fuel filler cap into the holder on
the inside of fuel filler flap ;.
X Completely insert the filler neck of the fuel
pump nozzle into the tank, hook in place
and refuel.
X Only fill the tank until the pump nozzle
switches off.
Do not add any more fuel after the pump
stops filling for the first time. Otherwise, fuel
may leak out.
Vehicles with a diesel engine: the filler neck is designed for refuelling at diesel filling pumps. Closing the fuel filler flap X
Replace the cap on the filler neck and turn
clockwise until it engages audibly.
X Close the fuel filler flap.
Close the fuel filler flap before locking the
vehicle. Refuelling
205Driving and parking Z

Problems with the fuel and fuel tank
Problem
Possible causes/consequences and
M
MSolutions Fuel is leaking from the
vehicle. G
WARNING
The fuel line or the fuel tank is faulty.
There is a risk of fire or explosion.
X Apply the electric parking brake.
X Switch off the engine.
X Remove the key from the ignition lock.
or, on vehicles with KEYLESS-GO start function or KEYLESS ‑GO:
X Open the driver's door.
The on-board electronics now have status 0. This is the same as
the key having been removed.
X Do not restart the engine under any circumstances.
X Consult a qualified specialist workshop. The engine does not
start. The fuel tank of a vehicle with a diesel engine has been run com-
pletely dry.
X Refuel the vehicle with at least 5 litres of diesel.
X Turn the ignition on for approximately ten seconds
(Y page 187).
X Start the engine continuously for a maximum of ten seconds
until it runs smoothly.
If the engine does not start:
X Turn the ignition on again a maximum of ten seconds
(Y page 187).
X Start the engine again continuously for a maximum of ten sec-
onds until it runs smoothly.
If the engine does not start after three attempts:
X Consult a qualified specialist workshop. The fuel filler flap can-
not be opened. The fuel filler flap is not unlocked.
X Unlock the vehicle (Y page 95). The key battery is discharged or nearly discharged.
X Unlock the vehicle using the emergency key element
(Y page 97). The fuel filler flap is unlocked, but the opening mechanism is jam-
med.
X Consult a qualified specialist workshop. 206
RefuellingDriving and parking

AdBlue
®
(BlueTEC vehicles only)
General notes To function properly, BlueTEC exhaust gas
aftertreatment must be operated with the
reducing agent AdBlue ®
.
When the supply of AdBlue ®
is down to
approximately 3.0 litres, the Refill
Refill
AdBlue See Owner’s Manual
AdBlue See Owner’s Manual message is
shown in the multifunction display.
If you drive the vehicle faster than 15 km/h
after topping up, the Refill AdBlue See Refill AdBlue See
Owner’s Manual
Owner’s Manual message goes out after
approximately one minute.
When the AdBlue ®
supply drops to a mini-
mum, the Refill AdBlue No start
Refill AdBlue No start
in ... mi in ... mi message is shown in the multi-
function display.
When the Refill AdBlue No start
Refill AdBlue No start
in ... mi
in ... mi message is shown in the multi-
function display, you can still drive the vehicle
over the distance shown. If the AdBlue ®
is not
topped up, you will subsequently be unable
to start the engine . If theRefill AdBlue Refill AdBlue
Start not possible
Start not possible message appears in
the multifunction display and the engine does
not start, you must top up AdBlue ®
.
X Add at least 3.5 l of AdBlue ®
.
X Switch on the ignition for at least 60 sec-
onds.
X Start the engine.
i You can also have the AdBlue ®
tank refil-
led at a qualified specialist workshop.
Before driving your vehicle outside Europe,
have the AdBlue ®
supply checked at a quali-
fied specialist workshop.
Further information about BlueTEC exhaust
gas aftertreatment and about AdBlue ®
can
be obtained from any Mercedes-Benz Service Centre. Important safety notes AdBlue
®
is a water-soluble fluid for the
exhaust gas aftertreatment of diesel engines.
It is:
R non-toxic
R colourless and odourless
R non-flammable
If you open the AdBlue ®
tank, small amounts
of ammonia vapour may be released.
Ammonia vapours have a pungent odour and
are particularly irritating to the skin, to
mucous membranes and to the eyes. You may experience a burning sensation in your eyes,
nose and throat. You may also experience
coughing and watery eyes.
Do not inhale any ammonia vapours that may
be released. Only fill the AdBlue ®
tank in well-
ventilated areas.
Do not swallow AdBlue ®
or let it come into
contact with skin, eyes or clothing. Keep
AdBlue ®
away from children.
If you or others come into contact with
AdBlue ®
, observe the following:
R immediately rinse AdBlue ®
off your skin
with soap and water.
R if AdBlue ®
comes into contact with your
eyes, immediately rinse them thoroughly
with clean water. Seek medical attention
immediately.
R if AdBlue ®
is swallowed, immediately rinse
your mouth out thoroughly. Drink plenty of water. Seek medical attention immedi-
ately.
R change immediately out of clothing that
has come into contact with AdBlue ®
.
! Only use AdBlue ®
in accordance with
ISO 22241. Do not mix any additives with
AdBlue ®
, and do not dilute AdBlue ®
with
water. This may destroy the BlueTEC
exhaust gas aftertreatment system.
! In order to fill the AdBlue ®
tank, the vehi-
cle must be parked on a level surface. The
AdBlue ®
tank can only be filled as intended Refuelling
207Driving and pa rking Z

with the vehicle parked on a level surface.
Fluctuations in capacity will thus be avoi-
ded. Filling a vehicle standing on an uneven surface is not permitted. There is a danger
of overfilling, which can cause damage to
BlueTEC exhaust gas aftertreatment com-
ponents.
! Surfaces which have come into contact
with AdBlue ®
while refilling should be
rinsed immediately with water, or remove
AdBlue ®
with a moist cloth and cold water.
If AdBlue ®
has already crystallised, use a
sponge and cold water to clean the area.
AdBlue ®
residue crystallises after a certain
amount of time and soils the affected sur-
faces.
! AdBlue ®
is not a fuel additive and must
not be added to the fuel tank. If AdBlue ®
is
added to the fuel tank, this can lead to
engine damage.
Have the AdBlue ®
tank refilled at a qualified
specialist workshop. However, you can also
top up the AdBlue ®
tank:
R at a filling station with an AdBlue ®
filling
pump
R with AdBlue ®
refill bottles
R with an AdBlue ®
refill canister
When the pump nozzle switches off automat- ically during filling at a filling pump, the
AdBlue ®
tank has been completely filled. Do
not fill the AdBlue ®
tank any further. AdBlue ®
may leak out.
To avoid transporting already opened refill
containers in the vehicle, completely empty
refill bottles or canisters when filling the
AdBlue ®
tank, if possible.
Further information on AdBlue ®
(Y page 484). Opening the AdBlue
®
filler cap X
Switch the ignition off.
X Press the fuel filler flap in the direction of
arrow :.
The fuel filler flap swings up.
X Turn blue AdBlue ®
fuel filler cap ;anti-
clockwise and remove it.
AdBlue ®
filler cap ;is secured with a plas-
tic strip.
i The fuel filler flap is unlocked or locked
automatically when you unlock or lock the
vehicle.
AdBlue ®
refill canisters !
Do not tighten the disposable hose with
too much force. The disposable hose may
otherwise be destroyed. X
Unscrew the cap from the opening on top of
AdBlue ®
refill canister ;.
X Place disposable hose :on the opening of
AdBlue ®
refill canister ;and screw it on
clockwise until hand-tight. 208
RefuellingDriving and parking

extension cable or similar could cause a fire or
an electric shock. There is a risk of fatal injury.
To avoid hazardous situations, observe the
following:
R Only connect the charging cable to a wall-
box:
-
which has been properly installed and
- which has been inspected by a qualified
electrician
R For safety reasons, only use charging
cables that have been tested and approved
by the manufacturer for charging the high-
voltage battery in an electric vehicle.
R Never use damaged charging cables.
R Do not extend the charging cable.
R Never use adapters.
R Observe the safety notes in the operating
instructions for the wallbox.
The vehicle's high-voltage electrical system is
under high voltage.
R Do not handle high-voltage components or
the orange cables of the vehicle's high-volt-age electrical system.
R Do not touch high-voltage components or
the orange cables of the high-voltage elec-
trical system when a vehicle has been
involved in a crash.
R Do not touch any damaged components or
the damaged orange cables of the vehicle's
high-voltage electrical system.
R Do not remove the covers of the high-volt-
age electrical system components that are
marked with a warning sticker. General notes
Operation The vehicle is equipped with a high-voltage
battery for driving. The high-voltage battery
stores the energy needed to operate the elec-
tric motor and releases it again.
The electric motor uses energy that has been stored in the high-voltage battery when pull- ing away, accelerating and during the jour-
ney.
In overrun mode, kinetic energy is converted
by means of energy recuperation into electri- cal energy and stored in the high-voltage bat-
tery. Information on overrun mode
(Y page 299).
The high-voltage battery can be charged as
follows:
R through energy recuperation while the
vehicle is in motion
R during the journey by the combustion
engine in CHARGE operating mode
(Y page 290)
R with the relevant charging cable at a mains
socket while the vehicle is stationary
R with the relevant charging cable at a wall-
box while the vehicle is stationary
R with the relevant charging cable at a charg-
ing station while the vehicle is stationary
The high-voltage battery can be charged in a
nominal voltage range from 100 V to 240 V.
You can view the charge status of the high-
voltage battery in the multifunction display.
You can find information in "PLUG-IN HYBRID
operation", section "Menus and submenus"
under "Energy flow display" (Y page 291).
High and low outside temperatures Low outside temperatures
The maximum performance of the high-volt-
age battery is significantly reduced at very
low outside temperatures. The high-voltage
battery is then no longer able to provide the
normal electrical power output.
High outside temperatures
To prevent damage to the high-voltage bat-
tery due to very high outside temperatures,
the maximum power output of the high-volt-
age battery is reduced by the vehicle. Charging the high-voltage battery (PLUG-IN HYBRID vehicles)
211Driving and parking Z

Right indi-
cator lamp
Ý Ý
Flashes
orange The connection between
the vehicle and the current
source is being established
before charging begins.
Flashes
green The high-voltage battery is
charging.
Flashes red A malfunction has occurred
while charging.
The indicator lamp goes out
after approximately
90 seconds. Lights up
orange Charging of the high-voltage
battery has been tempora-
rily interrupted.
The indicator lamp goes out
after approximately
90 seconds. Lights up
green The high-voltage battery is
fully charged.
The indicator lamp goes out
after approximately
90 seconds. i
If the indicator lamps are off, lock or
unlock the vehicle. The indicator lamps will then display the current status of the charg-ing process again. Connecting the charging cable
X
Shift the transmission to position P.
X Switch the ignition off.
X Press the charge socket flap in the direc-
tion of arrow :.
The charge socket flap swings up.
X Open socket cap ;.
X Insert the mains plug into the mains socket
to the stop.
X Insert the charging cable connector into
vehicle socket Ato the stop.
The high-voltage battery is charging.
The Ý right indicator lamp ?first
flashes orange and then green.
i If the charging cable is plugged in, you
cannot start the engine or move the vehi-
cle.
i Depending on the temperature, the cool-
ing fan and battery cooling system may
audibly switch on during the charging proc- ess. Charging the high-voltage battery (PLUG-IN HYBRID vehicles)
215Driving and parking Z

Removing the charging cable
The high-voltage battery is fully charged
when:
R the charge level display reaches 100% in
the multifunction display
R the indicator lamp in the vehicle socket
lights up green after unlocking or locking
the vehicle
You can find information on the charge status indicator in the multifunction display in
"PLUG-IN HYBRID operation", section
"Menus and submenus" under "Energy flow
display" (Y page 291).
i After the charging cable has been discon-
nected, the indicator lamps in the vehicle
socket remain lit for some time before
switching off.
X Unlock the vehicle.
X Remove the charging cable from vehicle
socket Awithin 30 seconds. Otherwise,
the vehicle will relock.
X Close socket cap ;.
X Close charge socket flap :.
X Remove the charging cable from the mains
socket.
X Stow the charging cable safely in the vehi-
cle (Y page 213). Charging the high-voltage battery
from the wallbox
General notes It is recommended that you charge your vehi-
cle using a wallbox or at a charging station.
Use the optionally available fast-charging
cable when charging your vehicle from a wall- box. The charging cable is stored in a bag in
the luggage compartment.
Only use charging cables that have been tes-ted and approved by the manufacturer for
charging the high-voltage battery in an elec-
tric vehicle. Observe the "Important safety notes"
(Y
page 210).
Connecting the charging cable X
Shift the transmission to position P.
X Switch the ignition off.
X Press the charge socket flap in the direc-
tion of arrow :.
The charge socket flap swings up.
X Open socket cap ;.
X Insert the charging cable connector into
vehicle socket Ato the stop.
X Wallbox without a preinstalled cable: insert
the charging cable connector into the
power socket of the wallbox to the stop.
The high-voltage battery is charging.
The Ý right indicator lamp ?first
flashes orange and then green.
i If the charging cable is plugged in, you
cannot start the engine or move the vehi-
cle.
i Depending on the temperature, the cool-
ing fan and battery cooling system may 216
Charging the high-voltage battery (PLUG-IN HYBRID vehicles)Driving and parking

Problem
Possible causes/consequences and
M
MSolutions The charging cable con-
nector cannot be
removed from the vehi- cle socket. The charging cable connector has not been unlocked.
X Press the %button on the key. The charging cable connector
on the vehicle socket is unlocked.
X Remove the charging cable connector from the vehicle socket. The charging cable connector is blocked.
X Consult a qualified specialist workshop. Parking
Important safety notes
G
WARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with hot parts of the exhaust system or exhaust
gas flow. There is a risk of fire.
Park the vehicle so that no flammable mate-
rial can come into contact with hot vehicle
components. In particular, do not park on dry grassland or harvested grain fields. G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect, 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 leave children unattended in the vehi-
cle, they may be able to set the vehicle in
motion if, for example, they:
R release the parking brake
R shift the automatic transmission out of park
position P
R start the engine In addition, they may operate vehicle equip-
ment and become trapped. There is a risk of
an accident and injury.
When leaving the vehicle, always take the key
with you and lock the vehicle. Never leave
children unattended in the vehicle.
! Always secure the vehicle correctly
against rolling away. Otherwise, the vehicle
or its drivetrain could be damaged.
To ensure that the vehicle is safeguarded
against rolling away unintentionally: R the electric parking brake must be applied
R the transmission must be in position Pand
the key must be removed from the ignition lock
R the front wheels must be turned towards
the kerb on steep uphill or downhill gradi-
ents
R the empty vehicle must be secured at the
front axle with a wheel chock or similar
object, for example, on uphill or downhill
gradients
R a laden vehicle must also be secured at the
rear axle with a wheel chock or similar
object, for example, on uphill or downhill
gradients Parking
219Driving and parking Z