alternator MERCEDES-BENZ GLC SUV 2015 Owners Manual

Problems with "Pre-entry climate control via key"
Problem
Possible causes/consequences and
M
MSolutions "Pre-entry climate con-
trol via key" cannot be
activated or has been
deactivated. The charge status of the high-voltage battery is under the specified
minimum charge status.
X Start the engine when the vehicle is at a standstill.
The internal combustion engine drives the electric motor. The
electric motor is operating as an alternator. The high-voltage
battery is charging.
Further information on charging the high-voltage battery via: R a mains socket (Y page 213)
R a charging station (Y page 217)
R a wallbox (Y page 216) "Pre-entry climate control via key" has been started more than
twice with the engine switched off.
X Switch on the engine and let it run for more than ten seconds.
X Try again to activate "Pre-entry climate control via key". Pre-entry climate control at time of
departure
Important safety notes G
WARNING
If persons (particularly children) are exposed
to heat or cold for a prolonged period, there is a risk of serious or even fatal injuries. Never
leave persons (particularly children) unatten-
ded in the vehicle.
General notes The "Pre-entry climate control at departure
time" function is only available in PLUG-IN
HYBRID vehicles.
You can use the "Pre-entry climate control at
departure time" function to cool or heat the
vehicle interior if the engine is not running.
The "Pre-entry climate control at departure
time" function can be activated regardless of
whether or not the vehicle is connected to an electric power supply. However, the charge
status of the high-voltage battery must be higher than the specified minimum charge
status.
When the vehicle is connected to an electric
power supply, priority is given to charging the
high-voltage battery to the specified mini-
mum charge. "Pre-entry climate control at
departure time" is only activated subse-
quently.
The running time of the "Pre-entry climate
control at departure time" function may be
reduced if:
R the vehicle is not connected to an electric
power supply and
R the high-voltage battery is not fully charged
With active "Pre-entry climate control at
departure time" the charge status of the high- voltage battery can be reduced, even if the
charge cable connector is connected.
When the vehicle is cooled, the following
functions are activated as needed:
R Automatic climate control
R Blower
R Seat ventilation 176
Operating the climate control systemClimate control

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
alternator 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 46).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
For further information, see (Y page 357).
All of the vehicle's systems remain active, if:
R the vehicle is stationary
R the combustion engine is switched off
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 298).
Vehicles with an electric motor generate sig-
nificantly less noise than vehicles with inter-
nal 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 vehi-
cle is not seen by other road users.
This requires you to adopt a particularly antic-
ipatory driving style, as it is necessary to allow for the possibility that other road users may
behave unpredictably. PLUG‑IN HYBRID operation
287Driving and parking Z

=
Charge status of the high-voltage battery
? High-voltage battery
A Energy flow
The active hybrid components are highligh-
ted.
The energy flow is indicated by arrows. The
arrows have a different colour depending on
the operating state.
Automatic engine switch-off The internal combustion engine and the elec-
tric motor are switched off.
The arrows for the energy flow are not shown.
The charge status of the high-voltage battery
is shown when the key is in position 2in the
ignition lock.
Engine running while the vehicle is sta-
tionary The combustion engine is running while the
vehicle is stationary. The high-voltage battery
is not being charged.
The arrows for the energy flow are not shown. The combustion engine is highlighted. Charging while the vehicle is stationary
The internal combustion engine drives the
electric motor. The electric motor is operating
as an alternator. The high-voltage battery is
charging.
The arrow representing energy flow is shown in white.
Driving using the internal combustion
engine The internal combustion engine powers the
vehicle.
The arrows for the energy flow are shown in
white. 292
PLUG
‑IN HYBRID operationDriving and pa rking

Driving using the internal combustion
engine and boost mode If you rapidly depress the accelerator, the
electric motor supports the internal combus-
tion engine by providing additional torque.
The arrows for the energy flow are shown in
red.
Driving using the internal combustion
engine and energy recuperation The internal combustion engine powers the
vehicle. The electric motor is being operated
as an alternator, e.g. in overrun mode and
when braking (Y page 299). The kinetic
energy of the vehicle is converted into elec-
trical energy. The high-voltage battery is
charging.
The arrows for the energy flow are shown in
green. Driving using the internal combustion
engine and charging the high-voltage bat-
tery The internal combustion engine powers the
vehicle. The internal combustion engine also
drives the electric motor. The electric motor
is operating as an alternator. The high-voltage battery is charging.
The arrows for the energy flow are shown in
white.
Driving using the internal combustion
engine and discharging the high-voltage
battery The internal combustion engine powers the
vehicle. If the vehicle is approaching a down-
hill gradient with a high potential for energy
recuperation, the charge status of the high-
voltage battery is intentionally kept low or
intentionally reduced.
The arrows for the energy flow are shown in
white.
Further information on route-based energy
management (Y page 299). PLUG
‑IN HYBRID operation
293Driving and parking Z

Electric operation mode
The electric motor powers the vehicle. The
high-voltage battery supplies the electric
motor with electrical energy.
The arrows for the energy flow are shown in
green.
Electric operation mode and charging the
high-voltage battery The electric motor is being operated as an
alternator, e.g. in overrun mode and when
braking. The kinetic energy of the vehicle is
converted into electrical energy. The high-
voltage battery is charging.
The arrows for the energy flow are shown in
green. Charging the high-voltage battery when
stationary The internal combustion engine and the elec-
tric motor are switched off.
The arrows for the energy flow are not shown.
Further information on charging the high-volt-
age battery via:
R a mains socket (Y page 213)
R a charging station (Y page 217)
R a wallbox (Y page 216)
Displaying the total range and electrical range The approximate range is based on the cur-
rent driving style.
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 Travel Travelmenu.
X Confirm by pressing aon the steering
wheel.
X Press :or9 to select the approxi-
mate total range and electrical range. 294
PLUG‑
IN HYBRID operationDriving and parking

rily. The selected gear and
Mappear in the
multifunction display.
Activating when driving with the combustion
engine:
X Pull the left or right steering wheel gearshift
paddle (Y page 201).
Manual gearshifting is activated tempora-
rily. The selected gear and Mappear in the
multifunction display.
The ECO start/stop function is not available
when manually changing gear.
Further information on the manual drive pro-
gram (Y page 201).
Haptic accelerator pedal General notes
The haptic accelerator pedal helps you to
reduce the fuel consumption and emissions
of your vehicle.
There are two different functions available for
this purpose:
R an additional point of resistance in E-MODE
operating mode (Y page 290)
R a double pulse in drive program E
(Y page 295)
Additional point of resistance in the hap-
tic accelerator pedal
The maximum available electric performance
is indicated by a tangible point of resistance
in the haptic accelerator pedal.
The additional point of resistance is available in E-MODE operating mode (Y page 290).
If you depress the haptic accelerator pedal
beyond the pressure point, the combustion
engine is switched on.
Double pulses in the haptic accelerator
pedal
A noticeable double pulse in the haptic accel-
erator pedal is a recommendation that you
should release the accelerator pedal. By this
means, in HYBRID,E-MODE orE-SAVE oper-
ating mode the combustion engine can be switched off and disconnected from the
power train (overrun mode).
The double pulse is available in drive program
E (Y page 295).
After the accelerator pedal has been
released, the coasting characteristics of the
vehicle are adapted to the traffic conditions
To avoid getting too close to the vehicle in
front, you must apply the brakes manually
when necessary.
Driving tips General driving tips
Drive carefully and maintain a suitable dis-
tance from the vehicle in front. Avoid frequent
and sudden acceleration as well as abrupt
braking.
During partial electric drive, pulling away and acceleration, the electric motor supports the internal combustion engine.
During overrun in transmission position Dand
braking, the electric motor operates as an
alternator.
Further information on the ECO start/stop
function (Y page 298).
Additional driving tips (Y page 222).
Stationary vehicle
If the vehicle is stopped, the combustion
engine is, for the most part, switched off.
Automatic climate control continues to func-
tion. The electro-mechanically assisted steer-
ing gear allows use of the power steering
without loss of comfort.
Acceleration
Depending on the operating mode, pulling
away and driving under low load conditions
are performed:
R entirely by electric propulsion
R in combination with the internal combus-
tion engine
When accelerating at an increased or full
load, boost mode is utilised. The electric
motor supports the internal combustion PLUG‑IN HYBRID operation
297Driving and parking Z

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

The internal combustion engine will not be
switched off automatically, if:
R the self-diagnosis function of the engine
control unit is still active
R there is a malfunction in the hybrid drive
system
R the climate control of the vehicle requires it
R the high-voltage battery is being charged
(Y page 292)
R automatic emissions tests are running
Automatic engine start
The internal combustion engine, which has
been automatically switched-off, starts auto-
matically in certain situations, when:
R the power demand from the driver via the
accelerator pedal is greater than the elec-
tric motor alone can provide
R the driver switches to drive program Sor M
R the charge level of the high-voltage battery
has reached the lower limit
R the settings of the automatic climate con-
trol require it, e.g. at external temperatures
above 30 †
Overrun mode
In overrun mode, the combustion engine is
switched off and is disconnected from the
drive train. The electric motor:
R generates low thrust, which corresponds to
the overrun mode of an active combustion
engine
R functions as an alternator and produces the
necessary energy for the auxiliary consum- ers and charges the high-voltage battery
Overrun mode is available in drive program E
below 160 km/h.
In drive program E, after the accelerator pedal
has been released the coasting characteris-
tics of the vehicle are adapted to the traffic
conditions. Further information about the
haptic accelerator pedal (Y page 297).Route-based energy management For route-based energy management, the
system factors in information about the
expected route when route guidance is
active.
The information on the route is provided by
COMAND Online and includes the following:
R road categories
R speed limitations
R data on downhill gradients
The use of electric energy is automatically
optimally distributed from the beginning to
the end of the journey, using information
about the route. The distribution is pre-emp-
tive and takes into consideration:
R the sections of the journey ahead
R the energy consumption on the whole route
The charge status of the high-voltage battery
is thus systematically controlled. In addition,
the control function takes into account that:
R the fuel savings through the use of electri-
cal energy can vary, depending on the route
(e.g. urban, interurban or motorway)
R the use of electrical energy is held available
in particular for electric operation (e.g.
urban routes)
The vehicle thus automatically selects the
optimum driving mode for the respective sec- tion of the route.
Route-based energy management is available
under the following conditions:
R drive program Eis selected
R HYBRID driving mode is selected
R active route guidance is activated
R suitable map data is available
When route-based energy management is in
operation, the area in front of the vehicle is
shown as green in the multifunction display. PLUG‑IN HYBRID operation
299Driving and parking Z

Display messages
Possible causes/consequences and
M
MSolutions ?
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 Safeguard the vehicle against rolling away (Y page 219).
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.
If the temperature increases again:
X Consult a qualified specialist workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 120 †. #
See Owner's Manual See Owner's Manual The battery is not being charged.
A warning tone also sounds.
Possible causes:
R faulty alternator
R defective power electronics (PLUG-IN HYBRID vehicles)
R torn poly-V-belt
R a malfunction in the electronics
! Do not continue driving. The engine could otherwise overheat.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Safeguard the vehicle against rolling away (Y page 219).
X Consult a qualified specialist workshop. 354
Display
messagesOn-board computer and displays

R
Make sure that the positive terminal of a
connected battery does not come into con-
tact with vehicle parts.
R Never place metal objects or tools on a bat-
tery.
R It is important that you observe the descri-
bed order of the battery terminals when
connecting and disconnecting a battery.
R When jump-starting, make sure that the
battery poles with identical polarity are
connected.
R It is particularly important to observe the
described order when connecting and dis-
connecting the jump leads.
R Never connect or disconnect the battery
terminals while the engine is running. G
WARNING
Battery acid is caustic. There is a risk of injury. Avoid contact with the skin, eyes or clothing.
Do not breathe in any battery gases. Do not
lean over the battery. Keep the batteries out
of the reach of children. Immediately rinse off
battery acid thoroughly with plenty of clean
water and seek medical attention at once.
All vehicles: H
Environmental note Batteries contain pollutants.
It is illegal to dispose of them with the household rubbish.
They must be collected sep-
arately and disposed of in anenvironmentally responsible
recycling system. Dispose of batteries in an
environmentally responsible
manner. Take discharged
batteries to a qualified spe-
cialist workshop or to a col-
lection point for used batter-
ies.
! Have the battery checked regularly at a
qualified specialist workshop. Observe the service intervals in the Service
Booklet or contact a qualified specialist
workshop for more information.
! Always have work on the batteries carried
out at a qualified specialist workshop.
Should it, in exceptional circumstances, be absolutely necessary to disconnect the 12-
volt battery yourself, please observe the
following:
R secure the vehicle to prevent it from roll-
ing away.
R switch off the engine and remove the
key. Make sure the ignition is switched
off. Check that all the indicator lamps in
the instrument cluster are off. Otherwise,
you may damage electronic components such as the alternator, for example.
R first, disconnect the negative terminal
clamp, followed by the positive terminal
clamp. Never swap the terminal clamps.
The vehicle electronics may otherwise be
damaged.
R the transmission is locked in position P
after disconnecting the battery. The vehi-
cle is secured against rolling away. You
can then no longer move the vehicle.
The batteries and the covers of the positive
terminal clamps must always be fitted
securely during operation.
Comply with safety precautions and take pro-
tective measures when handling batteries. Risk of explosion
Fire, naked flames and smoking
are prohibited when handling the
battery. Avoid creating sparks.
Electrolyte or battery acid is corro-
sive. Avoid contact with the skin,
eyes or clothing.
Wear suitable protective clothing,
in particular gloves, an apron and a face mask. Battery (vehicle)
439Breakdown assistance Z