keyless MERCEDES-BENZ E-CLASS CABRIOLET 2015 User Guide

Problems with the key
Problem
Possible causes/consequences and
M
MSolutions You can no longer lock or
unlock the vehicle using
the key. The key battery is discharged or nearly discharged.
X Check the key battery (Y page 77) and replace if necessary
(Y page 77).
If this does not work: X Unlock (Y page 82) or lock (Y page 82) the vehicle using the
emergency key element. There is interference from a powerful source of radio waves.
X Unlock (Y page 82) or lock (Y page 82) the vehicle using the
emergency key element. The key is faulty.
X Unlock (Y page 82) or lock (Y page 82) the vehicle using the
emergency key element.
X Have the key checked at a qualified specialist workshop. You can no longer lock or
unlock the vehicle using
KEYLESS-GO. KEYLESS-GO has been deactivated.
X Reactivate KEYLESS-GO (Y page 75). The key battery is discharged or nearly discharged.
X Check the key battery (Y page 77) and replace if necessary
(Y page 77).
If this does not work: X Unlock (Y page 82) or lock (Y page 82) the vehicle using the
emergency key element. There is interference from a powerful source of radio waves.
X Unlock (Y page 82) or lock (Y page 82) the vehicle using the
emergency key element. There is a fault with KEYLESS-GO.
X Lock/unlock the vehicle using the remote control function of the
key.
X Have the vehicle and key checked at a qualified specialist work-
shop.
If the vehicle cannot be locked/unlocked even using the remote con-
trol function:
X Unlock (Y page 82) or lock (Y page 82) the vehicle using the
emergency key element.
X Have the vehicle and key checked at a qualified specialist work-
shop. Key
79Opening 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

!
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

You can lock the boot separately. If you then
unlock the vehicle centrally, the boot remains
locked and cannot be opened.
X Close the boot lid.
X Take the emergency key element out of the
key (Y page 76). X
Insert the emergency key element into the
boot lid lock as far as the stop.
X Turn the emergency key element clockwise
from position 1to position 2.
X Pull out the emergency key element.
X Insert the emergency key element into the
key. Unlocking the boot (emergency key
element)
! The boot lid swings upwards when opened.
Therefore, make sure that there is sufficient
clearance above the boot lid.
If the boot cannot be unlocked with the key or
KEYLESS-GO, use the emergency key element.
If you use the emergency key element to unlock
and open the boot lid, the anti-theft alarm sys-
tem will be triggered. Switch off the alarm
(Y page 71).
X Take the emergency key element out of the
key (Y page 76).
X Insert the emergency key element into the
boot lid lock as far as the stop. X
Turn the emergency key element from posi-
tion 1anti-clockwise as far as it will go to
position 2. When doing so, also pull the boot
lid handle.
The boot is unlocked.
X Turn the emergency key element back to posi-
tion 1and remove it.
X Insert the emergency key element into the
key (Y page 76). Side windows
Important safety notes
G
WARNING
While opening the side windows, body parts
could become trapped between the side win- dow and the door frame as the side window
moves. There is a risk of injury.
Make sure that nobody touches the side win-
dow during the opening procedure. If some-
body becomes trapped, release the switch or pull the switch to close the side window again. G
WARNING
While closing the side windows, body parts in the closing area could become trapped. There is a risk of injury.
When closing make sure that no parts of the
body are in the closing area. If somebody
becomes trapped, release the switch or press
the switch to open the side window again. 84
Side windowsOpening and closing

Opening and closing all side windows
Using the switch on the centre console G
WARNING
When a side window is closed, body parts may become trapped in the closing range. There is a risk of injury.
Ensure that there are no body parts in the
closing range of the window when closing it. If
somebody becomes trapped, release the but- ton immediately or press the lower section of
the button to open the side window again.
Using the switch on the centre console, you can
close all side windows simultaneously.
X Open the cover on the lower centre console.
The switch for all side windows is under the
cover. X
To open all side windows: press switch:
to the point of resistance.
X To open all side windows fully: press
switch :beyond the point of resistance.
X To close all side windows: pull switch:.
Using the key G
WARNING
While closing the side windows, body parts in the closing area could become trapped. There is a risk of injury.
When closing make sure that no parts of the
body are in the closing area. If somebody
becomes trapped, release the switch or press
the switch to open the side window again. You can use the key to open or close all side
windows simultaneously. The key must be near
the door handle.
X Close the soft top (Y page 89).
X Open the boot separator (Y page 94).
X To open all side windows: press the%
switch on the key until the side windows are
fully opened.
X To interrupt the opening procedure:
release the
%switch.
X To close all side windows: press the&
switch on the key until the side windows are
fully closed.
X To interrupt the closing procedure: release
the & switch.
Convenience closing with KEYLESS-GO G
WARNING
When using convenience closing, you could
become trapped within the sweep of the clos- ing window. There is a risk of injury.
Monitor the entire closing procedure when
using convenience closing. When closing,
make sure that no one has any parts of the
body within the closing area.
If someone is trapped, proceed as follows:
X Release recessed sensor surface on the door
handle.
X Immediately pull and hold the door handle
and keep the door handle pulled.
The side windows open.
With KEYLESS-GO you can close all side win-
dows simultaneously. The KEYLESS-GO key
must be outside the vehicle. All the doors must be closed. 86
Side windowsOpening and closing

The electrically adjustable steering wheel can
still be adjusted when there is no key in the igni- tion lock. Adjusting the steering wheel man-
ually
G
WARNING
The steering wheel may move unexpectedly if you adjust it while driving. This could cause
you to lose control of the vehicle. There is a
risk of an accident.
Make sure that the steering wheel is locked
before driving off. Never unlock the steering
wheel when the vehicle is in motion. :
Release lever
; To adjust the steering wheel height
= To adjust the steering wheel position (fore-
and-aft adjustment)
X Push release lever :down completely.
The steering column is unlocked.
X Adjust the steering wheel to the desired posi-
tion.
X Push release lever :up completely.
The steering column is locked.
X Check if the steering column is locked. When
doing so, try to push the steering wheel up or
down or try to move it in the fore-and-aft
direction. Adjusting the steering wheel electri-
cally
:
To adjust the steering wheel height
; To adjust the steering wheel position (fore-
and-aft adjustment)
i Further related subjects:
R EASY-ENTRY/EXIT feature (Y page 109)
R Storing settings (Y page 112) Steering wheel heating
Switching on/off X
Turn the key to position 2in the ignition lock
(Y page 139).
X To switch on/off: turn the lever in the direc-
tion of arrow :or;.
Indicator lamp =lights up or goes out.
Vehicles without KEYLESS-GO: when you
remove the key from the ignition lock, the steer-
ing wheel heating is switched off.
Vehicles with KEYLESS-GO: when you switch off the ignition and open the driver's door, the
steering wheel heating is switched off. Steering wheel
107Seats, steering wheel and mirrors Z

Problems with the steering wheel heating
Problem
Possible causes/consequences and
M
MSolutions The steering wheel heat-
ing has switched itself
off prematurely or can-
not be switched on. The on-board voltage is too low because too many electrical consum-
ers are switched on.
X Switch off electrical consumers that you do not need, such as the
rear window heating or interior lighting.
Once the battery is sufficiently charged, the steering wheel heating
will switch back on automatically. EASY-ENTRY/EXIT feature
Important safety notes G
WARNING
When the EASY-ENTRY/EXIT feature adjusts
the steering wheel, you and other vehicle
occupants – particularly children – could
become trapped. There is a risk of injury.
While the EASY-ENTRY/EXIT feature is mak-
ing adjustments, make sure that no one has
any body parts in the sweep of the steering
wheel.
Move the steering wheel adjustment lever if
there is a risk of entrapment by the steering
wheel. The adjustment process is stopped.
Vehicles with a memory function: if there is a
risk of becoming trapped by the steering wheel, you can also press one of the memory function
position buttons. The adjustment process is
stopped. G
WARNING
If children activate the EASY-ENTRY/EXIT fea- ture, they can become trapped, particularly
when unattended. There is a risk of injury.
When leaving the vehicle, always take the key with you and lock the vehicle. Never leave
children unattended in the vehicle. G
WARNING
If you drive off while the EASY-ENTRY/EXIT
feature is making adjustments, you could lose
control of the vehicle. There is a risk of an
accident. Always wait until the adjustment process is
complete before driving off.
The EASY-ENTRY/EXIT feature makes getting in
and out of your vehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature in the on-board computer
(Y page 227).
Position of the steering wheel when the EASY-ENTRY/EXIT feature is active The steering wheel tilts upwards if you:
R remove the key from the ignition lock
R with KEYLESS-GO: open the driver's door;
KEYLESS-GO must be in position 1
R with the key: open the driver's door; the key
must be in position 0or 1in the ignition lock
(Y page 139)
i The steering wheel only moves upwards if it
has not already reached the upper stop.
Position of the steering wheel for driv-
ing The steering wheel is moved to the previously
set position if:
R the driver's door is closed and
R with KEYLESS-GO: you press the Start/Stop
button once
or
R with the key: you insert the key into the igni-
tion lock
If you close the driver's door with the key inser-
ted in the ignition lock, the steering wheel is
automatically moved to the previously set posi- tion. Steering wheel
109Seats, steering wheel and mirrors Z

trapped by the wiper arm. There is a risk of
injury.
Always switch off the windscreen wipers and
ignition before changing the wiper blades.
! To avoid damaging the windscreen wiper
blades, make sure that you touch only the
wiper arm of the windscreen wiper.
! Never open the bonnet if a windscreen
wiper arm has been folded away from the
windscreen.
Never fold a windscreen wiper arm without a
wiper blade back onto the windscreen.
Hold the windscreen wiper arm firmly when
you change the wiper blade. If you release the
windscreen wiper arm without a wiper blade
and it falls onto the windscreen, the wind-
screen may be damaged by the force of the
impact.
Mercedes-Benz recommends that you have
the wiper blades changed at a qualified spe-
cialist workshop.
Replacing the wiper blades Removing the wiper blades
X Remove the key from the ignition lock or turn
the key to position 0(KEYLESS-GO).
X Fold the wiper arm away from the windscreen. X
Firmly press release knob :and pull wiper
blade ;upwards from the wiper arm in the
direction of the arrow. Fitting the wiper blades
X
Position new wiper blade :in the retainer on
the wiper arm and slide it into place in the
direction of the arrow.
The wiper blade audibly engages.
X Make sure that the wiper blade sits correctly.
X Fold the wiper arm back onto the windscreen. Windscreen
wipers
121Lights and windscreen wipers Z

Where possible, avoid spinning the drive
wheels when pulling away on slippery roads.
You could otherwise damage the drive train.
Key positions
Key g
To remove the key
1 Power supply for some consumers, such as
the windscreen wipers
2 Ignition (power supply for all consumers)
and drive position
3 To start the vehicle
i If the key does not belong to the vehicle, it
can still be turned in the ignition lock. How-
ever, the ignition will not be switched on. The
engine cannot be started.
KEYLESS-GO General notes
Vehicles with KEYLESS-GO are equipped with
keys featuring an integrated KEYLESS-GO func-
tion and a detachable Start/Stop button.
The Start/Stop button must be inserted in the
ignition lock and the key must be in the vehicle.
When you insert the Start/Stop button into the ignition lock, the system needs approximately
two seconds recognition time. You can then use
the Start/Stop button.
Pressing the Start/Stop button several times in succession corresponds to the different key
positions in the ignition lock. This is only the
case if you are not depressing the brake pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts immedi-
ately. 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, when starting the
engine.
To start the vehicle without actively using the
key:
R the Start/Stop button must be inserted in the
ignition lock
R the key must be in the vehicle
R the vehicle must not be locked with the key or
KEYLESS-GO (Y page 75)
Do not keep the KEYLESS-GO 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 functionality of KEYLESS-GO.
If you lock the vehicle with the key's remote
control or with KEYLESS-GO, after a short time:
R you will not be able to switch on the ignition
with the Start/Stop button
R you will not be able to start the engine with the
Start/Stop button until the vehicle is
unlocked again
If you lock the vehicle centrally using the button
on the front door (Y page 81), you can continue
to start the engine with the Start/Stop button.
The engine can be switched off while the vehicle is in motion by pressing and holding the Start/
Stop button for three seconds. This function
operates independently of the ECO start/stop
automatic engine switch-off function.
Key positions with KEYLESS-GO :
Start/Stop button
; Ignition lock Driving
139Driving and parking Z

General notes
i
Vehicles with a petrol engine:
the cata-
lytic converter is preheated for up 30 seconds
after a cold start. The sound of the engine may change during this time.
Manual transmission X
Depress the brake pedal and keep it
depressed.
X Fully depress the clutch pedal.
X Shift to neutral N.
Automatic transmission X
Shift the transmission to position P.
The transmission position indicator in the
multifunction display shows P.
i You can start the engine in transmission
position Pand N.
Starting procedure with the key i
To start the engine using the key instead of
KEYLESS-GO, pull the Start/Stop button out
of the ignition lock.
X Vehicles with diesel engine: turn the key to
position 2in the ignition lock (Y page 139).
The % preglow indicator lamp in the instru-
ment cluster lights up.
X Turn the key to position 3in the ignition lock
and release it as soon as the engine is running (Y page 139).
i Vehicles with a diesel engine:
you can
start the engine without preglow if the engine
is warm.
Using KEYLESS-GO to start the engine i
The Start/Stop button can be used to start
the vehicle manually without inserting the key into the ignition lock. The key must be in the
vehicle and the Start/Stop button must be
inserted in the ignition lock. This mode for
starting the engine operates independently of the ECO start/stop automatic engine start
function. X
Depress the brake pedal and keep it
depressed.
X Press the Start/Stop button once
(Y page 139).
Vehicles with a petrol engine: the engine
starts.
Vehicles with a diesel engine: preglow is
activated and the engine starts. Pulling away
General notes G
WARNING
Vehicles with automatic transmission:
If the engine speed is above the engine idling speed and you then engage transmission
position Dor R, the vehicle may accelerate
suddenly. There is a risk of an accident.
When engaging transmission position Dor R,
always keep the brake pedal firmly depressed
and do not depress the accelerator pedal at
the same time.
! Vehicles with manual transmission:
change gear in good time and avoid spinning
the wheels. You could otherwise damage the
vehicle.
! If a warning tone sounds and the
Release Release
park. brake
park. brake message appears in the multi-
function display, the parking brake is still
applied. Release the parking brake.
Depress the accelerator carefully when pulling
away.
The vehicle locks centrally once you have pulled
away. The locking knobs in the doors drop down.
You can open the doors from the inside at any
time.
You can also deactivate the automatic locking
feature (Y page 225).
Vehicles with automatic transmission: it is
only possible to shift the transmission from posi-
tion Pto the desired position if you depress the
brake pedal. If you do not depress the brake
pedal, the DIRECT SELECT lever can still be
moved but the parking lock remains engaged.
i Vehicles with automatic transmission:
upshifts take place at higher engine speeds Driving
141Driving and parking Z