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130Driving and operating9Warning
If the vehicle battery is discharged,
the vehicle must not be towed,
tow-started or jump-started as the
steering wheel lock cannot be
disengaged.
Operation on vehicles with
electronic key system in case of
failure
If either the electronic key fails or the
battery of the electronic key is weak,
the Driver Information Centre may
display No Remote Detected or
Replace Battery in Remote Key when
you try to start the vehicle.
Hold the electronic key with buttons outside at the marking on the steering column cover as shown in the
illustration.
Depress the clutch pedal (manual
transmission) or the brake pedal
(automatic transmission or manual
transmission automated) and press
Start/Stop button to start the engine.
This option is intended for
emergencies only. Replace the
electronic key battery as soon as
possible 3 24.
For unlocking or locking the doors,
see fault in radio remote control unit
or electronic key system 3 25.
Power saving mode
This function manages the duration of
using certain systems to avoid
discharging of the vehicle battery.
After the engine has stopped, some
systems can still be used such as the audio and telematics system,
windscreen wipers, dipped beam
headlamps, courtesy lamps, etc. for a total maximum time of about forty
minutes.
Changing into power saving
mode
When a certain discharging status of
the vehicle battery is achieved, the
active functions are switched in
standby mode. A message appears in the Driver Information Centre
indicating Power saving mode .
A telephone call being made at this
time will be maintained for around 10
minutes with the Bluetooth handsfree
system of the Infotainment system.
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Driving and operating131Deactivating power saving modeStandby mode is reactivated
automatically next time the vehicle is
driven. To use the functions
immediately, start the engine:
● for less than ten minutes to use the systems for approximately
five minutes
● for more than ten minutes to use the systems for up to
approximately thirty minutes.
Have the engine run for the duration
specified to ensure that the battery
charge is sufficient. Do not repeatedly
and continuously restart the engine in
order to charge the battery.Starting the engine
Vehicles with ignition switch
Turn key to position 1 to release the
steering wheel lock.
Manual transmission: operate clutch
and brake pedal.
Automatic transmission: operate
brake pedal and move selector lever
to P or N.
Do not operate accelerator pedal.
Diesel engines: wait until control
indicator ! extinguishes.
Turn key briefly to position 2 and
release after the engine has been
started.
Manual transmission: during an
Autostop, the engine can be started
by depressing the clutch pedal
3 132.
Automatic transmission: during an
Autostop, the engine can be started
by releasing the brake pedal 3 132.
Vehicles with power button
Manual transmission: operate clutch
and brake pedal.
Page 135 of 245

Driving and operating133ActivationThe stop-start system is available assoon as the engine is started, the
vehicle starts-off and the conditions
as stated below in this section are
fulfilled.
Deactivation
Deactivate the stop-start system
manually by pressing Ò. The
deactivation is indicated when the
LED in the button illuminates.
AutostopVehicles with manual transmission
An Autostop can be activated at a
standstill or at a low speed up to
14 km/h.
Activate an Autostop as follows: ● Depress the clutch pedal.
● Set the lever to neutral.
● Release the clutch pedal.
The engine will be switched off while
the ignition stays on.Vehicles with automatic transmission If the vehicle is at a standstill with
depressed brake pedal, Autostop is
activated automatically.
The engine will be switched off while the ignition stays on.
The stop-start system will be disabled
on inclines of 15% or more.Indication
An Autostop is indicated by control
indicator D.
During an Autostop, the heating and
brake performance will be
maintained.
Conditions for an Autostop
The stop-start system checks if each
of the following conditions is fulfilled.
● The stop-start system is not manually deactivated.
● The bonnet is fully closed.
● The driver's door is closed or the driver's seat belt is fastened.
● The vehicle battery is sufficiently charged and in good condition.
● The engine is warmed up.
● The engine coolant temperature is not too high.
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Driving and operating145Fault9Warning
If there is a fault in the ABS, the
wheels may be liable to lock due
to braking that is heavier than
normal. The advantages of ABS are no longer available. During
hard braking, the vehicle can no longer be steered and may
swerve.
Have the cause of the fault remedied
by a workshop.
Parking brake
9 Warning
Before leaving the vehicle, check
parking brake status. Control
indicator R must illuminate
constantly.
Manual parking brake9 Warning
Always apply parking brake firmly
without operating the release
button, and apply as firmly as
possible on a downhill or uphill
slope.
To release the parking brake, pull
the lever up slightly, press the
release button and fully lower the
lever.
To reduce the operating forces of
the parking brake, depress the
foot brake at the same time.
Control indicator R 3 89.
Brake assist
If brake pedal is depressed quickly
and forcefully, maximum brake force
is automatically applied.
Operation of brake assist might
become apparent by a pulse in the
brake pedal and a greater resistance when depressing the brake pedal.
Maintain steady pressure on the
brake pedal as long as full braking is
required. Maximum brake force is
automatically reduced when brake
pedal is released.
Hill start assist The system helps prevent unintendedmovement when driving away on
inclines.
When releasing the brake pedal after
stopping on an incline, brakes remain on for further two seconds. The
brakes release automatically as soon
as the vehicle begins to accelerate.
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158Driving and operatingDisplay indication
The instructions on the display show: ● General hints and warning messages.
● The demand to stop the vehicle, when a parking slot is detected.
● The direction of driving during the
parking manoeuvre.
● The demand to shift into reverse or first gear.
● The demand to stop or to drive slowly.
● The successful completion of the
parking manoeuvre indicated by
a pop-up symbol and a chime.
● The cancelling of a parking manoeuvre.
Deactivation The current park assist manoeuvre is
cancelled via the button to return to
the previous screen in the Colour-
Info-Display. To deactivate the
system completely, press r Off in
the centre console.The system is deactivated
automatically:
● if the ignition is switched off
● if stalling the engine
● if no manoeuvre is started within 5 minutes of selection of the type
of manoeuvre
● after a prolonged stop of the vehicle during a manoeuvre
● if the electronic stability control (ESC) is triggered
● if the speed of the vehicle exceeds the stated limit
● when the driver interrupts movement of the steering wheel
● after 4 manoeuvre cycles
● on opening the driver's door
● if one of the front wheels encounters an obstacle
● parking manoeuvre successfully ended
Deactivation by the driver or by the system during manoeuvring will be indicated on the display. Additionally,
an acoustic signal sounds.The system is switched off
automatically when towing a
electrically connected trailer.
Contact your dealer to switch off the
system for a prolonged period.
Fault
In the event of a fault, $ flashes for a
few seconds, accompanied by an
acoustic signal. If the fault occurs during the use of the system, $
extinguishes.
In the event of a fault in the power
steering, c flashes in the instrument
panel, accompanied by a message.9 Warning
Under certain circumstances,
various reflective surfaces on
objects or clothing as well as
external noise sources may cause the system to fail to detect
obstacles.
Special attention must be paid to
low obstacles which can damage
the lower part of the bumper.