2015 MERCEDES-BENZ GLE SUV alternator

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 elec-
tric 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 185)
R a charging station (Y page 189)
R a wallbox (Y page 188) "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 sta- tus 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 minimum charge. "Pre-entry climate control at departure
time" is only activated subsequently.
The running time of the "Pre-entry climate con-
trol 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 depar-
ture 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 func-
tions are activated as needed:
R Automatic climate control
R Blower
R Seat ventilation
When the vehicle is heated, the following func-
tions are activated as needed:
R Automatic climate control
R Blower
R Seat heating
If you have activated ionisation via the multime- dia system, it is activated together with "Pre-
entry climate control".
Switch on ionisation (see the separate operating instructions). 148
Operating the climate control systemClimate control

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 elec-
tric 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.
Driving using the internal combustion
engine and boost mode If you accelerate the vehicle rapidly, the electric
motor supports the combustion engine by pro-
viding additional drive torque.
The arrows for the energy flow are shown in red.
Driving using the internal combustion
engine and energy recuperation 264
Plug-in hybrid operationDriving and parking

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 269). 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.
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 bat- tery 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 downhill
gradient with a high potential for energy recu-
peration, 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 the route-based operat-
ing strategy (Y
page 269).
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 alter-
nator, 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. Plug-in hybrid operation
265Driving and parking Z

gearshifting, the combustion engine is always
switched on.
Activating when driving with the electric motor:
X Pull the left or right steering wheel gearshift
paddle (Y page 172).
The combustion engine is switched on. Man-
ual gearshifting is activated temporarily. The
selected gear and Mappear in the multifunc-
tion display.
Activating when driving with the combustion
engine:
X Pull the left or right steering wheel gearshift
paddle (Y page 172).
Manual gearshifting is activated temporarily.
The selected gear and Mappear in the multi-
function display.
The ECO start/stop function is not available
when manually changing gear.
Further information on the manual drive pro-
gram (Y page 172).
Driving tips General driving tips
Drive carefully and maintain a suitable distance 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 alter-
nator.
Further information on the ECO start/stop func-
tion (Y page 269).
Additional driving tips (Y page 194).
Stationary vehicle
If the vehicle is stopped, the combustion engine is, for the most part, switched off. Automatic
climate control continues to function. The elec-
tro-mechanically assisted steering gear allows
use of the power steering without loss of com-
fort. Acceleration
Depending on the operating mode, pulling away and driving under low load conditions are per-
formed:
R entirely by electric propulsion
R in combination with the internal combustion
engine
When accelerating rapidly under increased or
full load, increased boost mode is utilised. The
electric motor supports the combustion engine
by providing additional drive torque.
Overrun mode or braking There are three possible operating modes when
the hybrid vehicle is decelerating:
R When coasting and decelerating, energy recu-
peration is already taking place (Y page 259).
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 259). 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 sys-
tems work together.
Driving in the city In urban traffic, energy is recuperated during
frequent deceleration phases.
The vehicle is driven by the electric motor alone
only when all conditions for the automatic
engine switch-off are fulfilled.
Further information on the automatic engine
switch-off (Y page 269).
Driving on inter-urban roads The following phases are possible when driving
on inter-urban roads:
R rapid acceleration (boost mode)
R energy recuperation
R electric operation mode
The vehicle can be driven by the electric motor
alone up to a speed of approximately 120 km/h.
Depending on the characteristics of the route,
there may be a lot of recuperated energy avail-
able. This reduces consumption and emissions. 268
Plug-in hybrid operationDriving an
d parking

Driving on the motorway
When driving on a motorway, switching off the
combustion engine has a particularly positive
effect on fuel consumption and emissions.
If the driver removes his/her foot from the
accelerator pedal in the Comfortdrive program
and a speed of 130 km/h is not exceeded, the
combustion engine is automatically switched
off.
Further information on the automatic engine
switch-off (Y page 269).
ECO start/stop function General notes
The ECO start/stop function switches the com-
bustion engine off automatically when the vehi-
cle stops moving and at speeds below
130 km/h (Y page 269).
All vehicle systems remain active, e.g. the auto-
matic climate control.
The ECO start/stop function is neither available
in the Sport drive program nor during manual
shifting.
Automatic engine switch-off
The internal combustion engine is switched off
automatically if:
R the driver removes his/her foot from the
accelerator in the Comfortdrive program and
a speed of 130 km/h is not exceeded
(Y page 269)
R the internal combustion engine has reached
its operating temperature
R the driver only slightly depresses the accel-
erator pedal in order to, for example, maintain 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
The internal combustion engine will not be
switched off automatically, if:
R the self-diagnosis function of the engine man-
agement is active
R there is a malfunction in the hybrid drive sys-
tem R
the climate control of the vehicle requires it
R the high-voltage battery is charging
(Y page 264).
Automatic engine start
The internal combustion engine, which has been automatically switched-off, starts automatically
in certain situations, when:
R the power demand from the driver via the
accelerator pedal is greater than the electric
motor alone can provide
R the driver switches to the Sportdrive pro-
gram or to manual gearshifting
R the charge level of the high-voltage battery
has reached the lower limit
R the driver has selected the CHARGE operating
mode
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 consumers
and charges the high-voltage battery
Overrun mode is available in the Comfortdrive
program at speeds below 130 km/h.
Route-based operating strategy For the route-based operating strategy, the sys-
tem factors in information about the expected
route when route guidance is active.
The information on the route is provided by the
multimedia system and includes the following:
R road categories
R speed limitations
The use of electric energy is automatically opti- mally distributed from the beginning to the end
of the journey, using information about the
route. The distribution is pre-emptive and takes
into consideration:
R the sections of the journey ahead
R the energy consumption on the whole route Plug-in hybrid operation
269Driving and parking Z

Display messages
Possible causes/consequences and
M
MSolutions #
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 traffic
conditions, and switch off the engine.
X Safeguard the vehicle against rolling away (Y page 191).
X Consult a qualified specialist workshop. #
Stop vehicle See Stop vehicle See
Owner's Manual Owner's Manual The battery is no longer being charged and the battery charge level is
too low.
A warning tone also sounds.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Safeguard the vehicle against rolling away (Y page 191).
X Observe the instructions in the #See SeeOwner's
Owner's Manual
Manualdisplay
message.
X Consult a qualified specialist workshop. 4
Check Check
eng.
eng.oil
oillev.
lev.
when
when next
nextrefuelling
refuelling The engine oil level has dropped to the minimum level.
A warning tone also sounds.
! Avoid long journeys when there is too little coolant in the cooling
system. Otherwise the engine will be damaged.
X Check the oil level when next refuelling, at the latest (Y page 375).
X If necessary, top up the engine oil (Y page 375).
If you have to top up the engine oil frequently:
X Contact a qualified specialist workshop and have the engine
checked.
Information on approved engine oils can be obtained from any quali-
fied specialist workshop or on the Internet at http://bevo.mercedes-
benz.co m. Display
messages
317On-board computer and displays Z

Charging the high-voltage battery
when stationary (hybrid vehicles)
Only PLUG-IN HYBRID vehicles are equipped
with a high-voltage battery. 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.
! Only charge the high-voltage battery in the
"Charging when stationary" mode. Do not
connect a battery charger to the high-voltage battery. Otherwise, the vehicle's high-voltage
electrical system could be damaged.
X Stop the vehicle if the internal combustion
engine is running.
The internal combustion engine drives the
electric motor. The electric motor is operating
as an alternator. The high-voltage battery is
charging.
If the high-voltage battery is too heavily dis-
charged, recharge the high-voltage battery to at least 60% of its capacity. In the "Charging when
stationary" operating mode, you can observe
the charge status of the high-voltage battery up to a maximum of 70% in the COMAND display
and in the multifunction display (Y page 264).396
Battery (vehicle)Breakdown assistance