engine MERCEDES-BENZ E-CLASS CABRIOLET 2015 Owner's Manual

You can also switch off the hazard warning
lamps using the hazard warning button
(Y page 116). ESP
®
(Electronic Stability Program)
General notes i
Observe the "Important safety notes" sec-
tion (Y page 61).
ESP ®
monitors driving stability and traction, i.e.
power transmission between the tyres and the
road surface.
If ESP ®
detects that the vehicle is deviating from
the direction desired by the driver, one or more
wheels are braked to stabilise the vehicle. The
engine output is also modified to keep the vehi- cle on the desired course within physical limits.
ESP ®
assists the driver when pulling away on
wet or slippery roads. ESP ®
can also stabilise
the vehicle during braking.
ETS (Electronic Traction System) ETS traction control is part of ESP
®
.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
away and accelerate on slippery surfaces, for
example if the road surface is slippery on one
side. In addition, more drive torque is transfer-
red to the wheel or wheels with traction.
Traction control remains active if you deactivate ESP ®
.
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 61). G
WARNING
If ESP ®
is malfunctioning, ESP ®
is unable to
stabilise the vehicle. In addition, other driving
safety systems are switched off. This increa-
ses the risk of skidding and an accident.
Drive on carefully. Have ESP ®
checked at a
qualified specialist workshop.
! Vehicles with 4MATIC: function or perform-
ance tests may only be carried out on a 2-axle dynamometer. Before operating the vehicle
on such a dynamometer, please consult a qualified specialist workshop. You could oth-
erwise damage the drive train or the brake
system.
Vehicles without 4MATIC: when towing your
vehicle with the rear axle raised, observe the
notes on ESP ®
(Y page 317).
If the å ESP®
OFF warning lamp lights up
continuously, then ESP ®
is deactivated.
If the ÷ ESP®
warning lamp and the å
ESP ®
OFF warning lamp are lit continuously,
ESP ®
is not available due to a malfunction.
Observe the information on warning lamps
(Y page 256) and display messages which may
be shown in the instrument cluster
(Y page 230).
i Only use wheels with the recommended tyre
sizes. Only then will ESP ®
function properly.
Characteristics of ESP ® General notes
If the ÷ ESP warning lamp goes out before
beginning the journey, ESP ®
is automatically
active.
If ESP ®
intervenes, the ÷ESP®
warning lamp
flashes in the instrument cluster.
If ESP ®
intervenes:
X Do not deactivate ESP ®
under any circum-
stances.
X When pulling away, only depress the acceler-
ator pedal as far as is necessary.
X Adapt your driving style to suit the prevailing
road and weather conditions.
ECO start/stop function
The ECO start/stop function switches the
engine off automatically if the vehicle stops
moving. When pulling away again, the engine
starts automatically. ESP ®
remains in its previ-
ously selected status. Example:if ESP®
was
deactivated before the engine was switched off,
ESP ®
remains deactivated when the engine is
switched on again. Driving safety systems
67Safety Z

Deactivating/activating ESP
®Important safety notes
You can select between the following statuses
of ESP ®
:
R ESP ®
is activated
R ESP ®
is deactivated. G
WARNING
If you deactivate ESP ®
, ESP ®
no longer sta-
bilises the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP ®
in the situations descri-
bed in the following.
It may be best to deactivate ESP ®
in the follow-
ing situations:
R when using snow chains
R in deep snow
R on sand or gravel
i Activate ESP ®
as soon as the situations
described above no longer apply. ESP ®
will
otherwise not be able to stabilise the vehicle
if the vehicle starts to skid or a wheel starts to
spin.
Deactivating/activating ESP ®
You can deactivate or activate ESP ®
via the on-
board computer (Y page 221).
ESP ®
deactivated:
The å ESP®
OFF warning lamp in the instru-
ment cluster lights up.
ESP ®
activated:
The å ESP®
OFF warning lamp in the instru-
ment cluster goes out.
Characteristics when ESP ®
is deactivated
If ESP ®
is deactivated and one or more wheels
start to spin, the ÷ESP®
warning lamp in the
instrument cluster flashes. In such situations,
ESP ®
will not stabilise the vehicle.
If you deactivate ESP ®
:
R ESP ®
no longer improves driving stability
R Engine torque is no longer limited and the
drive wheels are able to spin
The spinning of the wheels results in a cutting action for better traction on loose surfaces. R
Traction control is still activated
R COLLISION PREVENTION ASSIST is no longer
available; nor is it activated if you brake firmly
with assistance from ESP ®
R PRE-SAFE ®
is no longer available; it is also not
activated if you brake firmly with assistance
from ESP ®
R PRE-SAFE ®
Brake is no longer available; it is
also not activated if you brake firmly with
assistance from ESP ®
R ESP ®
still provides support when you brake
firmly
ESP ®
trailer stabilisation General notes
If your vehicle/trailer combination begins to
lurch, ESP ®
assists you in this situation. ESP ®
slows the vehicle down by braking and limiting
the engine output until the vehicle/trailer com- bination has stabilised.
Important safety notes G
WARNING
If road and weather conditions are poor,
trailer stabilisation will not be able to prevent the vehicle/trailer combination from swerv-
ing. Trailers with a high centre of gravity can
tip over before ESP ®
can detect this. There is
a risk of an accident.
Always adapt your driving style to the prevail-
ing road and weather conditions.
If your vehicle/trailer combination begins to
lurch, you can only stabilise the vehicle/trailer
combination by depressing the brake firmly.
ESP ®
trailer stabilisation is active above speeds
of approximately 65 km/h.
ESP ®
trailer stabilisation does not work if ESP ®
is deactivated or disabled because of a malfunc- tion. 68
Driving safety syste
msSafety

and
R the vehicle speed is between approximately
7 km/h and 200 km/h
At a speed of up to approximately 70 km/h,
PRE-SAFE ®
Brake can also detect:
R stationary objects in the path of your vehicle,
e.g. stopped or parked vehicles
R pedestrians in the path of your vehicle
i If there is an increased risk of a collision,
preventive passenger protection measures
(PRE-SAFE ®
) are triggered (Y page 47).
If the risk of a collision with the vehicle in front
remains and you do not brake, take evasive
action or accelerate significantly, the vehicle
may perform automatic emergency braking up
to the point of full brake application. Automatic
emergency braking is not performed until imme- diately prior to an imminent accident.
You can prevent the intervention of PRE-SAFE ®
Brake at any time by:
R depressing the accelerator pedal further
R activating kickdown
R releasing the brake pedal
The braking action of PRE-SAFE ®
Brake is ended
automatically if:
R you manoeuvre to avoid the obstacle
R there is no longer a risk of collision
R there is no longer an obstacle detected in
front of your vehicle STEER CONTROL
General notes STEER CONTROL helps you by transmitting a
noticeable steering force to the steering wheel
in the direction required for vehicle stabilisation.
This steering support is provided in particular if:
R ESP ®
is deactivated
R both right wheels or both left wheels are on a
slippery road surface when you brake heavily
R the vehicle starts to skid
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 61). No steering support is provided by STEER CON-
TROL, if:
R ESP ®
is malfunctioning
R the steering is faulty
Power steering will, however, continue to func-
tion. Protection against theft
Immobiliser
The immobiliser prevents your vehicle from
being started without the correct key.
X To activate with the key: remove the key
from the ignition lock.
X To activate with KEYLESS-GO: switch the
ignition off and open the driver's door.
X To deactivate: switch on the ignition.
When leaving the vehicle, always take the key
with you and lock the vehicle. Anyone can start
the engine if a valid key has been left inside the
vehicle.
i The immobiliser is always deactivated when
you start the engine. ATA (Anti-Theft Alarm system)
X
To prime: lock the vehicle with the key or
KEYLESS-GO.
Indicator lamp :flashes. The alarm system
is primed after approximately 15 seconds.
X To switch off: unlock the vehicle with the key
or KEYLESS-GO.
or X Insert the key into the ignition lock. Protection against theft
71Safety Z

Key
Important safety notes
United Kingdom only: G
WARNING
When the double locks are activated, the
doors can no longer be opened from the
inside. People in the vehicle can no longer get out, e.g. in hazardous situations. There is a
risk of injury.
Therefore, do not leave any people unsuper-
vised in the vehicle, particularly children, eld-
erly people or people in need of special assis-
tance. Do not activate the double lock when
people are in the vehicle.
If the vehicle has been locked from the outside, the double lock function is activated as stand-
ard. It is then not possible to open the doors
from inside the vehicle. You can deactivate the
double lock function by deactivating the interior
motion sensor (Y page 73). The doors can then
be opened from the inside after the vehicle has
been locked from the outside. The anti-theft
alarm system is triggered if the door is opened
from the inside. Switch off the alarm
(Y page 71).
All countries: G
WARNING
If children are left unsupervised in the vehicle, they could:
R open doors, thereby endangering other per-
sons or road users
R get out and be struck by oncoming traffic
R operate vehicle equipment and become
trapped, for example
In addition, the children could also set the
vehicle in motion, for example, if they:
R release the parking brake
R shift the automatic transmission out of park
position P or shift manual transmission into
neutral
R start the engine
There is a risk of an accident and injury. When leaving the vehicle, always take the key
with you and lock the vehicle. Never leave
children and animals unattended in the vehi-
cle. Keep the keys out of the reach of children. G
WARNING
If you attach heavy or large objects to the key, the key could be unintentionally turned in the
ignition lock. This could cause the engine to
be switched off. There is a risk of an accident.
Do not attach any heavy or large objects to the
key. Remove any bulky keyrings before insert-
ing the key into the ignition lock.
! Keep the key away from strong magnetic
fields. Otherwise, the remote control function could be affected.
Strong magnetic fields can occur in the vicin-
ity of powerful electrical installations.
Do not keep the key: R with electronic devices, e.g. a mobile phone
or another key
R with metallic objects, e.g. coins or metal film
R inside metallic objects, e.g. a metal case
This can affect the key's functionality. Key functions
:
& Locks the vehicle
; F Unlocks the boot lid
= % Unlocks the vehicle
X To unlock centrally: press the%button.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
R the vehicle locks again
R protection against theft is reactivated 74
KeyOpening and closing

X
To lock centrally: press the&button.
The key centrally locks/unlocks: R the doors
R the boot lid
R the fuel filler flap
When unlocking, the turn signals flash once.
When locking, they flash three times.
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated or deactivated using the on-board computer (Y page 226).
When it is dark, the surround lighting also comes
on if it is activated in the on-board computer
(Y page 225). KEYLESS-GO
General notes Bear in mind that the engine can be started by
any of the vehicle occupants if there is a KEY-
LESS-GO key in the vehicle (Y page 141).
Locking and unlocking centrally You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you need to carry the
key with you. You can combine the KEYLESS-GO
functions with the functions of a conventional
key. Unlock the vehicle by using KEYLESS-GO,
for instance, and lock it using the &button
on the key.
When locking or unlocking with KEYLESS-GO,
the distance between the key and the corre-
sponding door handle must not be greater than 1 m.
A check which periodically establishes a radio
connection between the vehicle and the key
determines whether a valid key is in the vehicle. This occurs, for example:
R when the external door handles are touched
R when starting the engine
R whilst driving X
To unlock the vehicle: touch the inner sur-
face of the door handle.
X To lock the vehicle: touch sensor sur-
face :.
X Convenience closing feature: touch
recessed sensor surface ;for an extended
period. X
To unlock the boot lid: pull the boot lid han-
dle.
The vehicle only unlocks the boot lid.
Deactivating and activating If you do not intend to use a key for an extended
period of time, you can deactivate the KEYLESS-
GO function of the key. The key will then use very
little power, thereby conserving battery power.
For the purposes of activation or deactivation,
the vehicle does not have to be nearby. Key
75Opening and closing Z

Problem
Possible causes/consequences and
M
MSolutions The engine cannot be
started using the key. The on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
X Check the starter battery and charge it if necessary (Y page 312).
or X Jump-start the vehicle (Y page 313).
or X Consult a qualified specialist workshop. Only for vehicles with
manual transmission:
The engine cannot be
started using the key. The steering lock is mechanically blocked.
X Remove the key and reinsert it into the ignition lock. While doing
this, turn the steering wheel in both directions. The engine cannot be
started using KEYLESS-
GO. The key is in the
vehicle. The vehicle is locked.
X Unlock the vehicle and try to start the vehicle again. There is interference from a powerful source of radio waves.
X Start your vehicle with the key in the ignition lock. You have lost a key. X
Have the key deactivated at a qualified specialist workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the emer-
gency key element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. Doors
Important safety notes
United Kingdom only: G
WARNING
When the double locks are activated, the
doors can no longer be opened from the
inside. People in the vehicle can no longer get out, e.g. in hazardous situations. There is a
risk of injury.
Therefore, do not leave any people unsuper-
vised in the vehicle, particularly children, eld-
erly people or people in need of special assis-
tance. Do not activate the double lock when
people are in the vehicle. If the vehicle has been locked from the outside,
the double lock function is activated as stand-
ard. It is then not possible to open the doors
from inside the vehicle. You can deactivate the
double lock function by deactivating the interior
motion sensor (Y page 73). The doors can then
be opened from the inside after the vehicle has
been locked from the outside. The anti-theft
alarm system is triggered if the door is opened
from the inside. Switch off the alarm
(Y page 71).
All countries: 80
DoorsOpening and closing

G
WARNING
If children are left unsupervised in the vehicle, they could:
R open doors, thereby endangering other per-
sons or road users
R get out and be struck by oncoming traffic
R operate vehicle equipment and become
trapped, for example
In addition, the children could also set the
vehicle in motion, for example, if they:
R release the parking brake
R shift the automatic transmission out of park
position P or shift manual transmission into
neutral
R start the engine
There is a risk of an accident and injury.
When leaving the vehicle, always take the key with you and lock the vehicle. Never leave
children and animals unattended in the vehi-
cle. Keep the keys out of the reach of children. Unlocking and opening the doors
from the inside
! The side windows will not open/close if the
battery is discharged or if the side windows
have iced up. It will then not be possible to
close the door. Do not attempt to force the
door to close. You could otherwise damage
the door or the side window.
For all countries except the United Kingdom: you can open a door from inside the vehicle evenif it has been locked.
If the vehicle has previously been locked from
the outside, opening a door from the inside will
trigger the anti-theft alarm system. Switch off
the alarm (Y page 71).
Only for the United Kingdom: if the vehicle
has been locked with the key from the outside,
the double lock function is activated as stand-
ard. It is then not possible to open the doors
from inside the vehicle. You can deactivate the
double lock function by deactivating the interior
motion sensor (Y page 72). The doors can then
be opened from the inside after the vehicle has
been locked from the outside. The anti-theft
alarm system is triggered if the door is opened from the inside. Switch off the alarm
(Y
page 71).
All countries: X
Pull door handle ;.
If the door is locked, locking knob :pops up.
The door is unlocked and can be opened.
When a door is opened, the side window on that
side opens slightly. When the door is closed, the
side window is raised again. Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle from
the inside. The switches are on the driver's door. X
To unlock: press button :.
X To lock: press button ;.
If all the doors are closed, the vehicle locks.
This does not lock or unlock the fuel filler flap.
If the vehicle has been locked from the outside,
it cannot be centrally unlocked from the inside.
For all countries except the United Kingdom:
you can open a door from inside the vehicle even if it has been locked.
United Kingdom only: you can only open a
door from inside the vehicle if the double-lock Doors
81Opening and closing Z

function has been deactivated. You can deacti-
vate the double lock function by deactivating the
interior motion sensor (Y page 72).
For all countries: when a locked door is opened
from inside the vehicle, the previous unlocking
process will be observed if the vehicle has been:
R locked with the locking button for the central
locking or
R locked automatically
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. Only the door which
has been opened from the inside is unlocked if
only the driver's door had been previously
unlocked. Automatic locking feature
X
To deactivate: press and hold button :for
about five seconds until a tone sounds.
X To activate: press and hold button ;for
about five seconds until a tone sounds.
If you press one of the two buttons and do not
hear a tone, the relevant setting has already
been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are turn-
ing.
You could therefore be locked out if:
R the vehicle is being pushed.
R the vehicle is being towed.
R the vehicle is being tested on a dynamometer.
You can also activate and deactivate the auto-
matic locking function using the on-board com- puter (Y page 225). Unlocking/locking the driver's door
using the emergency key element
i If you want to centrally lock the vehicle using
the emergency key element, begin by press-
ing the locking button for the interior locking
mechanism while the driver's door is open.
Then proceed to lock the driver's door using
the emergency key element. X
To unlock: turn the emergency key element
anti-clockwise as far as it will go to position
1.
X To lock: turn the emergency key element
clockwise as far as it will go to position 1.
Right-hand-drive vehicle: turn the emergency
key element in the opposite direction in both
cases.
If you use the emergency key element to unlock
and open the driver's door, the anti-theft alarm
system will be triggered. Switch off the alarm
(Y page 71). Boot
Important safety notes
G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the boot
lid is open when the engine is running, espe-
cially if the vehicle is in motion. There is a risk of poisoning.
Always switch off the engine before opening
the boot lid. Never drive with the boot lid
open. 82
BootOpening and closing

!
The boot lid swings upwards when opened.
Therefore, make sure that there is sufficient
clearance above the boot lid.
The opening dimensions of the boot lid can be
found in the "Vehicle data" section
(Y page 342).
Stow luggage or loads preferably in the boot.
Observe the loading guidelines (Y page 272).
Do not leave the key in the boot. You could oth-
erwise lock yourself out.
The boot lid can be:
R opened and closed manually from outside
R opened automatically from inside
R locked separately
R unlocked with the emergency key element Opening/closing from the outside
Opening X
Press the %button on the key.
X Pull handle :.
X Raise the boot lid.
Closing X
Pull the boot lid down using recess :.
X If necessary, lock the vehicle with the &
button on the key (Y page 74) or with KEY-
LESS-GO (Y page 75).
If a KEYLESS-GO key is detected in the boot, the
boot lid cannot be locked. It then opens again. Opening automatically from inside
Important safety notes G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the boot
lid is open when the engine is running, espe-
cially if the vehicle is in motion. There is a risk of poisoning.
Always switch off the engine before opening
the boot lid. Never drive with the boot lid
open.
Opening X
Pull remote boot lid operating switch :until
the boot lid opens.
You can open the boot lid from the driver's seat when the vehicle is stationary and unlocked.
The opening dimensions of the boot lid can be
found in the "Vehicle data" section
(Y page 342). Locking the boot separately
The separate boot locking function is only avail-
able in certain countries. Boot
83Opening and closing Z

G
WARNING
If children operate the side windows they
could become trapped, particularly if they are left unsupervised. There is a risk of injury.
Activate the override feature for the rear side
windows. When leaving the vehicle, always
take the key with you and lock the vehicle.
Never leave children unattended in the vehi-
cle. Side window reversing feature
The side windows are equipped with an auto-
matic reversing feature. If a solid object blocks
or restricts a side window during the closing
process, the side window opens again automat-
ically. The automatic reversing feature is, how-
ever, only an aid and is no substitute for your
attention when closing a side window. G
WARNING
The reversing function does not react:
R to soft, light and thin objects, e.g. small fin-
gers
R over the last 4 mm of the closing movement
R during resetting
R when closing the side window again man-
ually immediately after automatic reversing
This means that the reversing function cannot prevent someone being trapped in these sit-
uations. There is a risk of injury.
When closing make sure that no parts of the
body are in the closing area. If someone
becomes trapped, press the switch to open
the side window again. Opening and closing the side win-
dows
The switches for all side windows are located on
the driver's door. There is also a switch on the
front-passenger door as well as on the doors in
the rear compartment on the left and right-hand sides for the corresponding side window.
The switches on the driver's door take prece-
dence. :
Front left
; Front right
= Rear right
? Rear left
X Turn the key to position 1or 2in the ignition
lock.
X To open manually: press and hold the cor-
responding button.
X To open fully: press the button beyond the
point of resistance and release it.
Automatic operation is started.
X To close manually: pull and hold the corre-
sponding switch.
X To close fully: pull the corresponding switch
beyond the pressure point.
Automatic operation is started.
X To interrupt automatic operation: press/
pull the corresponding switch again.
You can use automatic operation when opening or closing the front side windows. To do so,
press or pull the switch to just beyond the point
of resistance in the corresponding direction.
You can stop automatic operation by pressing or pulling again.
You can continue to operate the side windows
after switching off the engine or removing the
key. This function remains active for five
minutes or until the driver's or front-passenger
door is opened.
The side windows cannot be operated from the
rear when the override feature for the side win-
dows is activated (Y page 61). Side windows
85Opening and closing Z