2015 MERCEDES-BENZ GLC SUV brake

engine by providing additional torque when
the accelerator is depressed rapidly.
Overrun mode or braking
There are three possible operating modes
when the hybrid vehicle is decelerating:
R When coasting and decelerating, energy
recuperation is already taking place
(Y page 287). The electric motor functions
as an alternator and stores the recuperated energy in the high-voltage battery.
R When braking gently, the electric motor
increases the deceleration of the vehicle.
Energy recuperation is increased
(Y page 287). The electric motor functions
as an alternator and stores the recuperated energy in the high-voltage battery.
R During heavy braking, the service brake is
also used to slow down the vehicle. Both
systems work together.
Driving in the city
Energy is recuperated during frequent decel-
eration and stopping in city traffic.
The vehicle can be driven by the electric
motor alone up to a speed of approximately
140 km/h.
The vehicle is driven by the electric motor
alone only when all conditions for the auto-
matic engine switch-off are fulfilled.
Further information on the automatic engine
switch-off (Y page 298).
Driving on inter-urban roads
The following phases are possible when driv-
ing on inter-urban roads:
R rapid acceleration (boost mode)
R constant energy consumption
R energy recuperation
R electric operation mode
Depending on the characteristics of the
route, there may be a lot of recuperated
energy available. This reduces consumption
and emissions. Driving on the motorway
When driving on a motorway, the decrease in
wasted power has a particularly positive
effect on fuel consumption and emissions.
If the driver removes his foot from the accel-
erator pedal in drive program Eand a speed of
160 km/h is not exceeded, the combustion
engine is automatically switched off.
Further information on the automatic engine
switch-off (Y page 298).
ECO start/stop function General notes
The ECO start/stop function switches the
internal combustion engine off automatically
when the vehicle stops moving and at high
speeds (Y page 299).
All vehicle systems remain active, e.g. the
automatic climate control.
The ECO start/stop function is only available in drive programs Cand E. Electric-only oper-
ation is only possible in drive programs Cand
E. Additional information for drive programs
(Y page 295).
Automatic engine switch-off
The internal combustion engine is switched
off automatically if:
R the driver removes his foot from the accel-
erator in drive program Eand a speed of
160 km/h is not exceeded (Y page 299)
R the internal combustion engine has
reached its operating temperature
R the driver's seat belt is fastened and the
driver's door is closed
R the driver only slightly depresses the accel-
erator pedal in order to, for example, main- tain the current speed for a limited distance
R the bonnet is closed and engaged properly
R the high-voltage battery is charged suffi-
ciently
R no malfunctions are present in the hybrid
drive system 298
PLUG‑IN HYBRID operationDriving and parking

Parking
X Apply the electric parking brake.
The red !indicator lamp in the instru-
ment cluster lights up.
X Use the DIRECT SELECT lever to shift the
automatic transmission to P.
X Switch the ignition off.
The READY indicator in the instrument clus-
ter goes out.
Further information on parking and switching off the internal combustion engine
(Y page 220). 300
PLUG‑IN HYBRID operationDriving and parking

Problems with PLUG-IN HYBRID operation
Internal combustion engine Problem
Possible causes/consequences and
M
MSolutions You cannot start the
internal combustion
engine. The multifunc-
tion display shows no
display messages. The
READY indicator in the
multifunction display is
off. For example, self-diagnosis is not yet complete or the hybrid drive
system is malfunctioning.
X Switch off the ignition and turn it back on.
X Try to start the internal combustion engine again.
If the internal combustion engine still does not start: X Consult a qualified specialist workshop. You wish to pull away,
but the ECO start/stop
function does not start
the internal combus-
tion engine. The READY
indicator in the multi-
function display is off. The ECO start/stop function has failed. The warning and indicator
lamps in the instrument cluster light up.
X Shift the transmission to P.
X Switch off the ignition and turn it back on.
X Start the engine. The hybrid drive system is malfunctioning.
X Consult a qualified specialist workshop. Recuperative Brake System
Problem
Possible causes/consequences and
M MSolutions Braking resistance is
reduced and brake
pedal travel is longer
than usual.
G
Risk of accident
The Recuperative Brake System is malfunctioning.
X Observe the additional display messages in the multifunction
display (Y page 335).
X Observe the information regarding indicator and warning lamps
in the instrument cluster (Y page 377) . PLUG‑IN HYBRID operation
301Driving and parking Z

Hybrid drive system
Problem
Possible causes/consequences and
M
MSolutions The hybrid drive system
has been switched off
automatically. You have been in an accident.
The hybrid drive system remains switched off if:
R the internal combustion engine cannot be restarted after a few
seconds.
R the red 6restraint system warning lamp in the instrument
cluster is lit.
X Consult a qualified specialist workshop. The hybrid drive system
has been switched off
automatically. The mul-
tifunction display also
shows a display mes-
sage. An electrical short circuit has occurred in the hybrid drive system
or an electrical connection has been disconnected.
X Observe the additional display messages in the multifunction
display (Y page 335).
X Consult a qualified specialist workshop. Towing a trailer
Important safety notes
G
WARNING
You could lose control of the vehicle/trailer
combination if it begins to swerve. The vehi-
cle/trailer combination could even overturn.
There is a risk of an accident.
On no account should you attempt to
straighten out the vehicle/trailer combina-
tion by increasing speed. Decrease your
speed and do not countersteer. Brake if nec-
essary. G
WARNING
If the maximum the permissible load for a car- rier system is exceeded, the carrier could
come loose from the vehicle and endanger
other road users. There is a risk of an accident and injury.
Never exceed the permissible noseweight
when using a carrier. Exceeding the maximum permissible nose-
weight of the trailer drawbar on the ball cou-
pling may cause damage to the following:
R your vehicle
R the trailer
R the ball coupling
R trailer tow hitch
The vehicle/trailer combination could
become unstable.
If the noseweight used is lower than the min- imum permissible noseweight, the vehicle/
trailer combination could also become unsta- ble.
To avoid hazardous situations:
R make sure to check the noseweight before
each journey
R use a drawbar noseweight as close as pos-
sible to the maximum noseweight
R do not exceed the maximum permissible
noseweight
R do not use a noseweight lower than the
minimum noseweight 302
Towing a trailerDriving and parking

of the added maximum rear axle load when
towing a trailer, the vehicle/trailer combina-
tion may not exceed a maximum speed of
100 km/h for reasons concerning the oper-
ating permit. This also applies in countries in
which the permissible maximum speed for
vehicle/trailer combinations is above
100 km/h.
When towing a trailer, your vehicle's handling characteristics will be different in comparison
to when driving without a trailer and it will
consume more fuel.
Change into a lower gear in good time on long
and steep downhill gradients.
This also applies if cruise control, DISTRONIC PLUS or SPEEDTRONIC are activated.
This will use the braking effect of the engine,
so less braking will be required to maintain
vehicle speed. This relieves the load on the
brake system and prevents the brakes from
overheating and wearing too quickly. If you
need additional braking, depress the brake
pedal repeatedly rather than continuously.
Driving tips If the trailer swings from side to side:
X Do not accelerate.
X Do not countersteer.
X Brake if necessary.
R Maintain a greater distance to the vehicle in
front than when driving without a trailer.
R Avoid braking abruptly. If possible, brake
gently at first to allow the trailer to run on.
Then, increase the braking force rapidly.
R The values given for gradient-climbing
capabilities from a standstill refer to sea
level. When driving in mountainous areas,
note that the power output of the engine,
and consequently the vehicle's gradient-
climbing capability, decrease with increas-
ing altitude. Swinging out the ball coupling
G
WARNING
If the ball coupling is not engaged, the trailer
may come loose. There is a risk of an accident.
Make sure that the ball coupling is securely
engaged and locked in position.
! Do not attempt to speed the up the swing-
out procedure by applying additional pres-
sure with your foot. The system could oth-
erwise be mechanically damaged.
In order to tow a trailer with your vehicle, you
must swing out the ball coupling using the
switch in the driver's door or in the tailgate.
The trailer power socket is integrated in the
ball coupling and swivels out with it.
Only release the ball coupling when its range of movement is unobstructed. Folding out using the switch in the driv-
er's door (all vehicles except plug-in
hybrid vehicles):
X Make sure that the vehicle is stationary.
X Shift the transmission to position P.
X Switch the ignition on.
X Pull switch :briefly.
After a short time the ball coupling swings
out from under the rear bumper. It can take
up to seven seconds before the ball cou-
pling visibly swings out.
X Remove the protective covering from the
ball coupling and store it in a safe place. 304
Towing a trailerDriving and parking

Until the ball coupling securely engages and
locks in a vertical position:
R indicator lamp ;flashes
R the Trailer
Trailer coupling
coupling extending…
extending… mes-
sage appears in the multifunction display.
The ball coupling swivels back into the out-of- use position when:
R switch :is pulled again briefly during
swivelling
R you drive off before the Trailer cou‐
Trailer cou‐
pling extending…
pling extending… display message has
disappeared from the multifunction display
R the ball coupling encounters an obstacle in
the swinging range Swinging out using the switch in the tail-
gate:
X Make sure that the vehicle is stationary.
X Open the tailgate.
X Pull switch :briefly.
After a short time the ball coupling swings
out from under the rear bumper. It can take
up to seven seconds before the ball cou-
pling visibly swings out.
X Remove the protective covering from the
ball coupling and store it in a safe place.
Until the ball coupling securely engages and
locks in a vertical position:
R indicator lamp ;flashes
R the Trailer
Trailer coupling coupling extending…
extending… mes-
sage appears in the multifunction display. The ball coupling swivels back into the out-of-
use position when:
R switch :is pulled again briefly during
swivelling
R you drive off before the Trailer cou‐
Trailer cou‐
pling extending…
pling extending… display message has
disappeared from the multifunction display
R the ball coupling encounters an obstacle in
the swinging range
Further information:
R Display messages when towing a trailer
(Y page 369)
R Problems when swivelling the ball coupling
(Y page 309)
R Problems when swivelling the ball coupling;
see the "Problems when towing a trailer"
section in the Digital Owner's Manual Coupling up a trailer
X Make sure that the transmission is in posi-
tion P.
X Apply the electric parking brake.
X Position the trailer horizontally behind the
vehicle.
X Couple up the trailer.
X Establish the electric connection between
the vehicle and the trailer.
X Check that the trailer lighting system is
working.
X Push the combination switch upwards/
downwards and check whether the corre-
sponding turn signal on the trailer is flash-
ing.
A connected trailer is only recognised when
the electrical connection is established
correctly and when the lighting system is
working properly. The functioning of other
systems, e.g. ESP ®
, PARKTRONIC, Active
Parking Assist, Active Blind Spot Assist or
Lane Keeping Assist also depends on this. Towing a trailer
305Driving and parking Z

Uncoupling a trailer
G
WARNING
If you uncouple a trailer with an engaged over- run brake, you could trap your hand between
the vehicle and the trailer drawbar. This poses a risk of injury.
Do not uncouple a trailer with an engaged
overrun brake. G
WARNING
Vehicles with level control:
If you disconnect the trailer cable, the vehicle is lowered. This can cause you or others to
become trapped between the vehicle body
and tyres, or underneath the vehicle. This
poses a risk of injury.
Make sure that no-one is in the immediate
vicinity of the wheel arch or underneath the
vehicle when disconnecting the trailer cable.
! Do not disconnect a trailer with an
engaged overrun brake. Otherwise, your
vehicle could be damaged by the rebound- ing of the overrun brake.
! Remove the installed adapter cable
before folding in the ball coupling. Other-
wise, damage may occur to the rear
bumper and the adapter cable.
X Make sure that the transmission is in posi-
tion P.
X Apply the electric parking brake.
X Secure the trailer against rolling away.
X Remove the trailer cable and decouple the
trailer. Swinging the ball coupling in
! Do not attempt to speed the up the swing-
out procedure by applying additional pres-
sure with your foot. The system could oth-
erwise be mechanically damaged.
Swing the ball coupling back in using the
switch on the driver's door or tailgate, if you
are not using the trailer tow hitch. Only release the ball coupling when its range
of movement is unobstructed. Folding in using the switch in the driver's
door (all vehicles except plug-in hybrid
vehicles):
X Make sure that the vehicle is stationary and
the trailer cables are disconnected.
X Place the protective covering on the ball
coupling.
X Shift the transmission to position P.
X Switch the ignition on.
X Pull switch :briefly.
After a short time the ball coupling swings
in under the rear bumper. It can take up to seven seconds before the ball coupling visi-bly swings in.
Until the ball coupling securely engages and
locks under the bumper:
R indicator lamp ;flashes.
R the Trailer
Trailer coupling coupling extending…
extending… mes-
sage appears in the multifunction display
The ball coupling swivels back into the out-of-
use position when:
R switch :is pulled again briefly during
swivelling
R you drive off before the Trailer cou‐
Trailer cou‐
pling extending…
pling extending… display message has
disappeared from the multifunction display
R the ball coupling encounters an obstacle in
the swinging range 306
Towing a trailerDriving and parking

Redialling
The on-board computer saves the last names
or numbers dialled in the redial memory.
X Press òon the steering wheel to open
the menu list.
X Press the :or9 button on the steer-
ing 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 :or9 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
Press òon the steering wheel to open
the menu list.
X Press :or9 on the steering wheel
to select the Assistance graphic
Assistance graphic menu.
X Confirm by pressing aon the steering
wheel.
The multifunction display shows the
DISTRONIC PLUS distance display in the
assistance graphic.
The assistance graphic shows you the sta-
tus of and/or information from the follow- ing driving systems or driving safety sys-
tems:
R DISTRONIC PLUS (Y page 236)
R Traffic Sign Assist (Y page 274)
R Distance warning function and autono-
mous braking system of COLLISION PRE-
VENTION ASSIST PLUS (Y page 81)
R PRE-SAFE ®
Brake (Y page 87)
R Blind Spot Assist (Y page 276) or Active
Blind Spot Assist (Y page 280)
R ATTENTION ASSIST (Y page 272)
R Lane Keeping Assist (Y page 279) or
Active Lane Keeping Assist
(Y page 283)
R Rear window wiper (Y page 151)
X Press :to display the ATTEN-
TION ASSIST assessment. Service menu
Introduction Depending on the equipment fitted in the
vehicle, you have the following options in the
Service
Service menu:
R Calling up display messages in the mes-
sage memory (Y page 335)
R Restarting the tyre pressure loss warning
system (Y page 460) or checking the tyre
pressure electronically (Y page 461)
R Calling up the service due date
(Y page 419) 326
Menus and submenusOn-board computer and displays