DrivingVehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equipment
is also described that is not available in a vehicle,
e. g., because of the selected optional equip‐
ment or country variant. This also applies for
safety-related functions and systems.
Start/Stop button, drive
readiness states
The concept The following ready states can be
attained by pressing the Start/
Stop button:▷Radio ready state on/off.▷Ignition on/off.▷Activating/deactivating drive readiness.
To activate drive readiness, press the brake
pedal.
Switching radio ready state on/off
The radio ready state is activated by pressing
the Start/Stop button in the following situations:
▷When the engine is running.▷When the engine is switched off automati‐
cally using the Auto Start/Stop function and
the brake is not applied.
Some electronic systems/power consumers re‐
main ready for operation.
Radio ready state is switched off automatically:
▷After approx. 8 minutes.▷When the vehicle is locked using the central
locking system.▷Shortly before the battery is discharged
completely, so that the engine can still be
started.
Ignition on
Press the Start/Stop button, and do not press on
the brake pedal at the same time.
All vehicle systems are ready for operation.
Most of the indicator and warning lamps in the
instrument cluster light up for varying lengths of
time.
To save battery power when the engine is off,
switch off the ignition and any unnecessary
electronic systems/power consumers.
The ignition is switched off automatically in the
following situations:
▷When locking the vehicle, if the low beams
are switched on.▷Shortly before the battery is discharged
completely, so that the engine can still be
started.▷If the engine is switched off and the ignition
is switched on, the system automatically
switches to the radio ready state when the
door is opened if the lights are switched off
or the daytime running lights are switched
on.
Ignition off
Press the Start/Stop button again, and do not
press on the brake pedal at the same time.
All indicator lamps in the instrument cluster go
out.
To save battery power when the engine is off,
switch off the ignition and any unnecessary
electronic systems/power consumers.
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Transmission position P with the ignition
off
When the ignition is switched off, position P is
engaged automatically. When in an automatic
car wash, for example, ensure that the ignition is
not switched off accidentally.◀
The ignition is switched off automatically in the
following situations while the vehicle is station‐
ary and the engine is off:▷When locking the vehicle, and when the low
beams are activated.▷Shortly before the battery is discharged
completely, so that the engine can still be
started. This function is only available when
the low beams are switched off.▷When opening and closing the driver door, if
the driver's seat belt is unbuckled and the
low beams are switched off.▷While the driver's seat belt is unbuckled, if
the driver's door is open and the low beams
are switched off.
When the ignition is switched off, by opening or
closing the driver's door or unbuckling the driv‐
er's seat belt, the radio ready state remains ac‐
tive.
Drive readiness
When drive readiness is activated, the vehicle is
operational. The activated drive readiness is the
equivalent of starting the engine in conventional
vehicles.
The following are the different drive readiness
variants:
▷Electric driving, refer to page 67:
The combustion engine is not switched on.▷Driving with the combustion engine, refer to
page 67:
The vehicle is powered by the combustion
engine.Drive readiness in detail
General information Do not leave the vehicle unattended
Do not leave the vehicle unattended with
drive readiness active; otherwise, it presents a
potential source of danger.◀
Activating drive readiness1.Close the driver's door.2.Depress the brake pedal.3.Press the Start/Stop button.
Drive readiness is activated:
▷Starting the combustion engine or▷Electric drive readiness, Silent Start.
Electric drive readiness, Silent Start
The vehicle is ready for driving without starting
the combustion engine.
Silent Start is possible after activating radio
ready state if the conditions for electric driving,
refer to page 67, have been met.
Display The READY display indicates
that the vehicle is ready for driv‐
ing.
Awareness of vehicle reduced when
driven in electric mode
When driving in electric mode, note that due to
the lack of engine noise pedestrians and other
road users will not be as aware of the vehicle as
they usually would with a conventional engine.
For instance, pay particular attention when ma‐
neuvering into and out of a parking space.◀
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Starting the combustion engineEnclosed areas
Do not let the engine run in enclosed
areas; otherwise, breathing of exhaust fumes
may lead to loss of consciousness and death.
The exhaust gases contain carbon monoxide, an
odorless and colorless but highly toxic gas.◀
Unattended vehicle
Do not leave the vehicle unattended with
the engine running; doing so poses a risk of dan‐
ger.
Before leaving the vehicle with the engine run‐
ning, set the parking brake and place the trans‐
mission in position P or neutral to prevent the
vehicle from moving.◀
Repeated starting in quick succession
Avoid repeated unsuccessful attempts to
start the vehicle or starting the vehicle several
times in quick succession. Otherwise, the fuel is
not burned or is inadequately burned, posing a
risk of overheating and damage to the catalytic
converter.◀
The combustion engine is started with Activate
drive, refer to page 65, readiness under the fol‐
lowing conditions:▷The drive system is not at operating tem‐
perature.▷The temperature of the hybrid system is too
high.▷The high-voltage battery has an insufficient
charge.
Driving away
1.Activate drive readiness.2.Select transmission position D, M/S or R.3.Release the parking brake.4.Drive away.Deactivating drive readiness
After parking the vehicle, you may hear noises
due to operation of the hybrid system, such as
for cooling of the high-voltage battery.
After stopping the vehicle:1.Select transmission position P.2.Press the Start/Stop button.3.Set the parking brake.
Before driving into a car wash
In order for the vehicle to be able to roll into a car
wash, heed the information regarding Washing
in automatic car washes, refer to page 289.
Auto Start/Stop function
The concept
The Auto Start/Stop function helps save fuel.
The system switches off the combustion engine
when conditions for electric driving, refer to
page 67, have been met. The ignition remains
switched on. The tachometer registers 0 rpm. If
necessary, the combustion engine starts auto‐
matically.
Note
The combustion engine is not switched off au‐
tomatically in the following situations:
▷The combustion engine is not yet at oper‐
ating temperature.▷The high-voltage battery charge is very low
or there is a high load on the vehicle electri‐
cal system, for instance due to a high load
from automatic climate control.▷The interior is in the heating or cooling
phase.▷The engine compartment lid is unlocked.▷The vehicle is being optimized for the cur‐
rent driving style, for instance during the
breaking-in period or after a service appoint‐
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▷There are hybrid system faults.
Safety mode
The combustion engine does not start automat‐
ically in the following situations after an auto‐
matic engine stop:
▷When the driver's door is open and neither
the brake nor accelerator pedal are de‐
pressed.▷When the hood is unlocked.
The indicator lamps come on. The combustion
engine can only be started via the Start/Stop
button.
Switching off the vehicle during an
automatic engine stop
During an automatic engine stop, the vehicle
can be switched off permanently, e.g., when
leaving it.
1.Press the Start/Stop button. The ignition is
switched off. The Auto Start/Stop function
is deactivated.
Transmission position P is engaged auto‐
matically.2.Set the parking brake.
Malfunction
The Auto Start/Stop function no longer
switches of the engine automatically in the event
of a malfunction. A message is displayed. It is
possible to continue driving. Have the system
checked.
Electric driving: eDRIVE
Requirements
Electric driving is possible under the following
conditions:
▷The speed does not exceed 35 mph, approx.
60 km/h.▷The high-voltage battery is sufficiently
charged.▷Transmission position D or R is engaged.▷The drive system is at operating tempera‐
ture.▷The accelerator pedal is only slightly de‐
pressed.▷The driver's door is closed.
In addition, the combustion engine is switched
off during braking even below 50 mph, approx.
80 km/h or when coasting below 35 mph, ap‐
prox. 60 km/h.
In ECO PRO mode, already when coasting be‐
low 100 mph, approx. 160 km/h.
Possible cruising range
Depending on the charge of the high-voltage
battery, the vehicle can generally be driven us‐
ing electric power up to 2 miles, approx. 3.5 km.
Driving with the combustion
engine: DRIVE
The combustion engine provides the drive
power to propel the vehicle. The high-voltage
battery is charged at the same time.
Automatic start while driving
The combustion engine is automatically started
under the following conditions while driving:
▷Transmission position M/S is engaged.▷The speed does not exceed 35 mph, approx.
60 km/h.▷The high-voltage battery charge is insuffi‐
cient or it is fully charged, such as when driv‐
ing downhill.▷The required power output is increased,
such as due to the accelerator pedal position
or driving uphill.Seite 67DrivingControls67
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Displays of the hybrid system
Displays in the instrument cluster
The concept
The display depends on the system's operating
condition. The following functions of the hybrid
system are shown in the instrument cluster.▷High-voltage battery charge indicator.▷Electric driving: eDRIVE.▷Acceleration boost: ASSIST and eBOOST.▷Energy recovery: CHARGE.▷Auto Start/Stop function: READY.
High-voltage battery charge indicator
Displays the state of the high-
voltage battery's charge on a
scale from 0 to 1 when drive read‐
iness is active. If the scale indi‐
cates 1, the high-voltage battery
is fully charged.
During normal vehicle operation, the high-volt‐
age battery is charged up to approx. 80 %. This
ensures optimum energy recovery when decel‐
erating or driving downhill.
Even when the scale indicates 0, the hybrid sys‐
tem is always still under high voltage.
Electric driving: eDRIVE When driving with electric power,
the power output of the electric
motor is indicated by arrows.
Depending on the position of the
accelerator pedal, up to four ar‐
rows are displayed simultaneously. The tach‐
ometer pointer stays on 0 rpm.
If all four arrows are already displayed and addi‐
tional power is required, such as for accelera‐
tion, the combustion engine switches on.
Acceleration boost: ASSIST and
eBOOST
ASSIST: the electric motor as‐
sists the combustion engine.
This is indicated by arrows in the
instrument cluster.
eBOOST: all four arrows are dis‐
played when the electric motor reaches maxi‐
mum power output.
Energy recovery: CHARGE The energy recovered is dis‐
played in the tachometer as an
arrow with the symbol +. The
high-voltage battery is charging.
Auto Start/Stop function: READY The READY display indicates
that the vehicle is ready for driv‐
ing.
Indications on the Control Display
Displaying fuel consumption history1."Vehicle Info"2."Hybrid"3. "Consumption history"
Fuel consumption history
The gray bars show the fuel consumption by the
combustion engine, arrow 1. The blue bars show
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A change in the tire inflation pressure during
driving is taken into account.
A correction is only necessary if this is indicated
by the TPM
Wheels, green
The tire inflation pressure is equal to the target
state.
One wheel is yellow
A flat tire or major drop in inflation pressure in
the indicated tire.
All wheels are yellow▷A flat tire or major drop in inflation pressure
in several tires.▷The system was not reset after a wheel
change and thus warns based on the infla‐
tion pressures initialized last.▷A flat tire in one or more tires while the sys‐
tem is being reset.
Wheels, gray
The system cannot detect a flat tire. Reasons for
this may be:
▷TPM is being reset.▷Disturbance by systems or devices with the
same radio frequency.▷Malfunction.
For Canadian models: additional
information
The status display additionally shows the cur‐
rent tire inflation pressures and tire tempera‐
tures.
When correcting the tire inflation pressures,
note the following:
The tire pressure increases as the tire temper‐
ature increases.
Therefore, only correct the tire inflation pres‐
sure when the tire is at the ambient temperature.
Compare the displayed tire temperature with
the external temperature in the instrument clus‐
ter.
Resetting the system
Reset the system after each correction of the
tire inflation pressure and after every tire or
wheel change.1."Vehicle Info"2."Vehicle status"3. "Reset"4.Start the engine - do not drive away.5.Reset the tire pressure using "Reset".6.Drive away.
The tires are shown in gray and "Resetting
TPM..." is displayed.
After driving for a few minutes, the set tire infla‐
tion pressures are applied as set values. The re‐
setting process is completed automatically dur‐
ing driving. The tires are shown in green and
"TPM active" is shown on the Control Display.
The trip can be interrupted at any time. If you
drive away again, the process resumes auto‐
matically.
If a flat tire is detected during a reset, all tires are
displayed in yellow.
Low tire pressure message The yellow warning lamp lights up. A
Check Control message is displayed.
▷There is a flat tire or a major loss in
tire inflation pressure.▷The system was not reset after a wheel
change and thus warns based on the infla‐
tion pressures initialized last.1.Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.2.Check whether the vehicle is fitted with reg‐
ular tires or run-flat tires.Seite 98ControlsSafety98
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Message when the system was not
reset
A Check Control message is displayed.
The system detected a wheel change but was
not reset.
Warnings regarding the current tire inflation
pressure are not reliable.
Check the tire inflation pressure and reset the
system.
Malfunction The yellow warning lamp flashes and
then lights up continuously. A Check
Control message is displayed. No flat
tire can be detected.
Display in the following situations:▷A wheel without TPM electronics is fitted:
have the service center check it if necessary.▷Malfunction: have the system checked by
your service center.▷TPM could not be fully reset. Reset the sys‐
tem again.▷Disturbance by systems or devices with the
same radio frequency: after leaving the area
of the disturbance, the system automatically
becomes active again.
Declaration according to NHTSA/
FMVSS 138 Tire Pressure Monitoring
System
Each tire, including the spare (if provided)
should be checked monthly when cold and in‐
flated to the inflation pressure recommended by
the vehicle manufacturer on the vehicle placard
or tire inflation pressure label. (If your vehicle has
tires of a different size than the size indicated on
the vehicle placard or tire inflation pressure la‐
bel, you should determine the proper tire infla‐
tion pressure for those tires.) As an added safety
feature, your vehicle has been equipped with a
tire pressure monitoring system (TPMS) that il‐
luminates a low tire pressure telltale when one
or more of your tires is significantly under-in‐
flated. Accordingly, when the low tire pressure
telltale illuminates, you should stop and check
your tires as soon as possible, and inflate them
to the proper pressure. Driving on a significantly
under-inflated tire causes the tire to overheat
and can lead to tire failure. Under-inflation also
reduces fuel efficiency and tire tread life, and
may affect the vehicle's handling and stopping
ability. Please note that the TPMS is not a sub‐
stitute for proper tire maintenance, and it is the
driver's responsibility to maintain correct tire
pressure, even if under-inflation has not reached
the level to trigger illumination of the TPMS low
tire pressure telltale. Your vehicle has also been
equipped with a TPMS malfunction indicator to
indicate when the system is not operating prop‐
erly. The TPMS malfunction indicator is com‐
bined with the low tire pressure telltale. When
the system detects a malfunction, the telltale will
flash for approximately one minute and then re‐
main continuously illuminated. This sequence
will continue upon subsequent vehicle start-ups
as long as the malfunction exists. When the mal‐
function indicator is illuminated, the system may
not be able to detect or signal low tire pressure
as intended. TPMS malfunctions may occur for
a variety of reasons, including the installation of
replacement or alternate tires or wheels on the
vehicle that prevent the TPMS from functioning
properly. Always check the TPMS malfunction
telltale after replacing one or more tires or
wheels on your vehicle to ensure that the re‐
placement or alternate tires and wheels allow
the TPMS to continue to function properly.
FTM Flat Tire Monitor
The concept
The system does not measure the actual infla‐
tion pressure in the tires.
It detects a pressure loss in a tire by comparing
the rotational speeds of the individual wheels
while moving.Seite 100ControlsSafety100
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In the event of a pressure loss, the diameter and
therefore the rotational speed of the corre‐
sponding wheel change. This is detected and
reported as a flat tire.
Functional requirements
The system must have been initialized when the
tire inflation pressure was correct; otherwise,
reliable signaling of a flat tire is not ensured. In‐
itialize the system after each correction of the
tire inflation pressure and after every tire or
wheel change.
System limits Sudden tire damage
Sudden serious tire damage caused by
external influences cannot be indicated in ad‐
vance.◀
A natural, even pressure loss in all four tires can‐
not be detected. Therefore, check the tire infla‐
tion pressure regularly.
The system could be delayed or malfunction in
the following situations:▷When the system has not been initialized.▷When driving on a snowy or slippery road
surface.▷Sporty driving style: slip in the drive wheels,
high lateral acceleration.▷When driving with snow chains.
Status display
The current status of the Flat Tire Monitor can
be displayed on the Control Display, e.g.,
whether or not the FTM is active.
1."Vehicle Info"2."Vehicle status"3. "Flat Tire Monitor"
The status is displayed.
Initialization
The initialization process adopts the set inflation
tire pressures as reference values for the detec‐
tion of a flat tire. Initialization is started by con‐
firming the inflation pressures.
Do not initialize the system when driving with
snow chains.1."Vehicle Info"2."Vehicle status"3. "Reset"4.Start the engine - do not drive away.5.Start the initialization with "Reset".6.Drive away.
The initialization is completed while driving,
which can be interrupted at any time.
The initialization automatically continues when
driving resumes.
Indication of a flat tire The yellow warning lamp lights up. A
Check Control message is displayed.
There is a flat tire or a major loss in tire
inflation pressure.
1.Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.2.Check whether the vehicle is fitted with reg‐
ular tires or run-flat tires.
Run-flat tires, refer to page 267, are labeled
with a circular symbol containing the letters
RSC marked on the tire sidewall.
Do not continue driving without run-flat
tires
Do not continue driving if the vehicle is not
equipped with run-flat tires; continued driving
may result in serious accidents.◀
When a flat tire is indicated, DSC Dynamic Sta‐
bility Control is switched on if necessary.
Actions in the event of a flat tire
Normal tires
1.Identify the damaged tire.Seite 101SafetyControls101
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