engine MERCEDES-BENZ CLS-Class 2014 W218 Owner's Guide

Problem Possible causes/consequences and
000B Solutions
The engine cannot be
started using the
SmartKey. 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 324).
or
X Jump-start the vehicle (Y page 326).
or
X Consult aqualified specialist workshop. The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle. Ad
oor is open. Therefore, the SmartKey cannot be detected as
easily.
X Close the door and try to start the vehicle again. There is interferenc
efrom apowerful source of radio waves.
X Start your vehicle with the SmartKey in the ignition lock. Doors
Important safety notes
G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parking brake.
R shiftin gthe automatic transmission out of
park position P
R Start the engine.
There is arisk of an accident and injury.
When leaving the vehicle, alwayst ake the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children. G
WARNING
If persons, particularly children are subjected
to prolonged exposure to extreme heat or
cold, there is arisk of injury, possibly even
fatal. Never leave children unattended in the
vehicle. Unlocking and opening doors from
the inside
You can open adoor from inside the vehicle
even if it has been locked. If the vehicle has
been locked with the SmartKey or with
KEYLESS-GO, opening adoor from the inside
will trigger the anti-theft alarm system.
Switch off the alarm (Y page 74).
You can only open the rear doors from inside
the vehicle if they are not secured by the
child-proof locks (Y page 65).82
DoorsOpening and closing

You could therefore lock yourself out if:
R
the vehicle is being pushed.
R the vehicle is being towed.
R the vehicle is on aroller dynamometer.
You can also switc hthe automatic locking
function on and off using the on-board
computer (Y page 232). Unlocking th
edriver' sdoor
(mechanical key)
If the vehicle can no longer be unlocked with
the SmartKey, use the mechanical key.
X Take the mechanical key out of the
SmartKey (Y page 78).
X Insert the mechanical key int othe lock of
the driver's door as far as it will go. 0001
To unlock
X Turn the mechanical key counter-clockwise
to position 0001.
The door is unlocked.
X Turn the mechanical key back and remove
it.
X Insert the mechanical key int othe
SmartKey.
If you use the mechanical key to unloc kand
open the driver's door, the anti-thef talarm
system will be triggere d(Ypage 74). Locking th
evehicle (mechanical key)
If the vehicle can no longer be locked with the
SmartKey, use the mechanical key. X
Open the driver's door.
X Close the front-passenger door, the rear
doors and the trunk lid.
X Press the locking button (Y page 83).
X Check whether the locking knobs on the
front-passenger door and the rear doors
are still visible. Press down the locking
knobs manually, if necessary ( Ypage 82).
X Close the driver's door.
X Take the mechanical key out of the
SmartKey (Y page 78).
X Insert the mechanical key int othe lock of
the driver's door as far as it will go. 0001
To lock
X Turn the mechanical key clockwise as far
as it will go to position 0001.
X Turn the mechanical key back and remove
it.
X Make sure that the doors and the trunk lid
are locked.
X Insert the mechanical key int othe
SmartKey. Trunk
Important safety notes
G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide .Exhaust
gases can enter the vehicl einterio rifthe
trunk li disopenw hen the engine is running, 84
TrunkOpening and closing

especially if the vehicle is in motion
.There is
ar isk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open. G
WARNING
If persons, particularly children are subjected
to prolonged exposure to extremeh eat or
cold, there is arisk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
i Opening dimensions of the trunk lid
(Y page 379).
You should preferably place luggage or loads
in the cargo compartment. Observe the
loading guidelines (Y page 278).
Do not leave the SmartKey in the trunk.Y ou
could otherwise lock yourself out.
Vehicles without trunk lid remote closing
feature: the trunk lid can be:
R opened and closed manually from outside
R opened automatically from outside
R opened automatically from inside
R locked separately
R unlocked with the mechanical key
R opened with the emergency release button
Vehicles with trunk lid remote closing
feature: the trunk lid can be:
R opened and closed manually from outside
R opened and closed automatically from
outside
R opened and closed automatically from
inside
R locked separately
R unlocked with the mechanical key
R opened with the emergency release button Opening/closing from outside
Opening X
Press the 0014button on the SmartKey.
X Pull handle 001A.
Closing X
Pull the trunk lid down using recess 001A.
X If necessary, lock the vehicle with
the 000F button on the SmartKey
(Y page 76) or with KEYLESS-GO
(Y page 77).
i IfaK EYLESS-GO key is detected in the
trunk,t he trunk lid cannot be locked and
will open again. Trunk
85Opening and closing Z

Opening/closing automatically from
outside
Important safet ynotes G
WARNING
Combustion engine semit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trun klid is open when the engin eisrunning,
especially if the vehicle is in motion. There is
ar isk of poisoning.
Always switc hoff the engin ebefor eopening
the trunk lid. Never drive with the trunk lid
open.
! The trunk lid swing supwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
i Opening dimension softhe trunk lid
(Y page 379).
Opening You can open the trunk lid automatically
using the SmartKey or the handle in the trunk
lid.
X Press and hold the 000Bbutton on the
SmartKey until the trunk lid opens.
or
X If the trunk is unlocked, pull the trunk lid
handle and release it again immediately
(Y page 85).
Closing G
WARNING
Part soft he body could becom etrapped
durin gautomatic closing of the trunk lid.
Moreover, people, e.g. children, may be
standing in the closing area or may enter the
closing area durin gthe closing process. There
is ar isk of injury.
Make sure that nobody is in the vicinity of the
closing area durin gthe closing process. Use one of the followin
goptions to sto pthe
closing process:
R Press the 000Bbutton on the key.
R press the remote operating switc honthe
driver's door.
R Press the closing or locking button on the
trunk lid.
R Pull the trunk lid handle. Example: closing and locking button (vehicle with
the trunk lid remote closing feature and KEYLESS-
GO)
001A
Closing button
0010 Lockin gbutton
X To close: press closing button 001Ain the
trunk lid.
Vehicles with th etrunk lid remote closing
featur eand KEYLESS-GO: you can
simultaneously clos eand lock the trunk lid.
X Press locking button 0010in the trunk lid.
i If you leave aKEYLESS-GO key in the
trunk ,the trunk lid will not lock. Opening/closing automatically from
inside
Important safet ynotes G
WARNING
Part soft he body could becom etrapped
durin gautomatic closing of the trunk lid.
Moreover, people, e.g. children, may be
standing in the closing area or may enter the 86
TrunkOpening and closing

closing are
aduring the closing process .There
is ar isk of injury.
Make sure that nobody is in the vicinity of the
closing area during the closing process.
Use one of the following options to stop the
closing process:
R Press the 000Bbutton on the key.
R press the remote operating switch on the
driver's door.
R Press the closing or locking button on the
trunk lid.
R Pull the trunk lid handle. G
WARNING
The trunk lid can be automatically opened or
closed even if the SmartKey is not in the
vehicle. If children are left unsupervised in the
vehicle, they could activate the functions.
There is arisk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle. G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is
ar isk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
i Opening dimensions of the trunk lid
(Y page 379). Opening and closing X
To open: pull remote operating switch for
trunk lid 001Auntil the trunk lid opens.
X To close: press remote operating switch
for trunk lid 001Auntil the trunk lid is closed.
You can open the trunk lid from the driver's
seat when the vehicle is stationary and
unlocked. Unlocking the trunk (mechanical key)
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
If the trunk cannot be unlocked with the
SmartKey or KEYLESS-GO, use the
mechanical key.
If you use the mechanical key to unlock and
open the trunk lid, the anti-theft alarm system
will be triggered (Y page 74).
X Take the mechanical key out of the
SmartKey (Y page 78).
X Insert the mechanical key into the trunk lid
lock as far as it will go. Trunk
87Opening and closing Z

block
sorrestrict saside window during the
closin gprocess, the side window opens again
automatically. However ,the automatic
reversing feature is only an aid and does not
relieve you of the responsibility of paying
attention when closin gaside window. G
WARNING
The reversing feature does not react:
R to soft ,light and thin objects, e.g. small
fingers
R over the last 4mmofthe closing movement
R during resetting
R when closing the side window again
manually immediately after automatic
reversing
This means that the reversing feature cannot
prevent someone being trapped in these
situations. There is arisk of injury.
Make sure that no body parts are in close
proximity during the closing procedure. If
someone becomes trapped, press the switch
to open the side window again. Opening and closing the side
windows
The switches for all side windows are located
on the driver's door. There is also aswitch on
each door for the corresponding side window.
The switches on the driver's door take
precedence. 001A
Front left
0010 Front right 0024
Rear right
0021 Rear left
X Turn the SmartKey to position 1or 2in the
ignition lock.
X To open: press the corresponding switch.
X To close: pull the corresponding switch.
i If you press the switch beyond the point
of resistance, an automatic opening/
closing process is started in the
corresponding direction. You can stop
automatic operation by operating the
switch again.
i You can continue to operate the side
windows after you switch off the engine or
remove the SmartKey. This function is
available for up to five minutes or until the
driver's or front-passenger door is opened.
i When the override feature for the side
windows is activated (Y page 65), the side
windows cannot be operated from the rear. Convenienceo
pening
General notes You can ventilate the vehicle before you start
driving. To do this, the SmartKey is used to
carry out the following functions
simultaneously:
R
unlock the vehicle
R open the side windows
R open the sliding sunroof
R switch on the seat ventilation for the
driver's seat
i The convenience opening feature can
only be operated using the SmartKey. The
SmartKey must be close to the driver's
door handle. Side windows
89Opening and closing Z

Do not allo
wanything to protrude fro mthe
sliding sunroof. Otherwise, the seals could
be damaged.
! The weather can change abruptly. It could
start to rain or snow. Make sure that the
sliding sunroof is closed when you leave the
vehicle. The vehicle electronicsc an be
damaged if water enters the vehicle
interior.
i Resonance noises can occur in addition
to the usuala irflow noises when the sliding
sunroof is open. They are caused by minor
pressure fluctuations in the vehicle interior.
Change the position of the sliding sunroof
or open aside window slightly to reduce or
eliminate these noises. Sliding sunroof reversing feature
The sliding sunroof is equipped with an
automatic reversing feature. If asolid object
blocks or restrictst he sliding sunroof during
the closing process, the sliding sunroof opens
again automatically .However, the automatic
reversing feature is only an aid and does not
relieve you of the responsibility of paying
attention when closing the sliding sunroof. G
WARNING
The reversing feature does not react:
R to soft, light and thin objects, e.g. small
fingers
R over the last 4mmofthe closing movement
R during resetting
R when closing the sliding sunroof again
manually immediately after automatic
reversing
This means that the reversing feature cannot
prevent someone being trapped in these
situations. There is arisk of injury.
Make sure that no body parts are in close
proximity during the closing procedure. If somebody becomes trapped:
R
release the switch immediately, or
R during automatic operation, push the
switch briefly in any direction
The closing process is stopped. Operating the sliding sunroof
Opening and closing Overhead control panel
001A
To raise
0010 To open
0024 To close/lower
X Turn the SmartKey to position 1or 2in the
ignition lock.
X Press or pull the 0006switch in the
corresponding direction.
i If you press the 0006switch beyond the
point of resistance, an automatic opening/
closing process is started in the
corresponding direction. You can stop
automatic operation by operating the
switch again.
i The automatic opening and raising
feature is available only when the sliding
sunroof is closed.
The sun protection cover automatically opens
along with the sliding sunroof. You can open
or close the sun protection cover manually
when the sliding sunroof is raised or closed.
i You can continue to operate the sliding
sunroof after switching off the engine or Sliding sunroof
93Opening and closing Z

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please not ethat your vehicle may
not be equipped with all features
described. This also applies to safety-
related system sand functions.
i Read the information on qualified
specialist workshops: (Y page 26).Correct driver's seat position
G
WARNING
You could lose contro lofyour vehicle if you
do the following while driving:
R adjust the driver' sseat, head restraint,
steering wheel or mirrors
R faste nthe seat belt
There is arisk of an accident.
Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before startingt he engine. X
Observe the safety guidelines on seat
adjustment (Y page 99).
X Make sure that seat 0024is adjusted
properly.
Electrical seat adjustment (Y page 100)
When adjusting the seat, make sure that:
R you are as far away from the driver's air bag
as possible.
R you are sitting in anormal upright position.
R you can fasten the seat belt properly.
R you have moved the backrest to an almost
vertical position.
R you have set the seat cushion angle so that
your thighs are gently supported.
R you can depress the pedals properly.
X Check whether the head restraint is
adjusted properly.
When doing so, make sure that you have
adjusted the head restraint so that the back
of your head is supported at eye level by
the center of the head restraint.
X Observe the safety guidelines on steering
wheel adjustment (Y page 106).
X Make sure that steering wheel 001Ais
adjusted properly.
Adjustingt he steering wheel electrically
(Y page 106)
When adjusting the steering wheel, make
sure that:
R you can hold the steering wheel with your
arms slightly bent.
R you can move your legs freely.
R you can see all the displays in the
instrumentc luster clearly.
X Observe the safet yguideline sfor seat belts
(Y page 55).
X Check whether you have fastened seat
belt 0010properly (Y page 56). 98
Correct driver'
sseat positionSeats, steering wheel and mirrors

The seat belt should:
R
fit snugly across your body
R be routed across the middle of your
shoulder
R be routed in your pelvic area across the hip
joints
X Before starting off, adjust the rear-view
mirror and the exterior mirrors in such a
way that you have agood view of road and
traffic conditions (Y page 109).
X Vehicles with amemor yfunction: save
the seat, steerin gwheel and exterior mirror
settings with the memory function
(Y page 112). Seats
Important safety notes
G
WARNING
Children could become trapped if they adjust
the seats, particularly when unattended.
There is arisk of injury.
When leaving the vehicle, alway stake the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle. G
WARNING
You could lose control of your vehicle if you
do the following while driving:
R adjust the driver's seat, head restraint,
steerin gwheel or mirrors
R fasten the seat belt
There is arisk of an accident.
Adjust the driver's seat, head restraint,
steerin gwheel and mirror and fasten your
seat belt before starting the engine. G
WARNING
If you adjust the seat height carelessly, you or
other vehicle occupant scould be trapped and
thereby injured. Children in particular could
accidentally press the electrical seat adjustmen
tbutton sand become trapped.
Ther eisar iskofi njury.
While moving the seats, make sure tha tyour
hands or other body parts do not get under
the lever assembly of the seat adjustment
system. G
WARNING
When you adjust aseat, you or other vehicle
occupant scould become trapped, e.g. on the
seat guide rail. There is arisk of injury.
Make sure when adjusting aseat that no one
has any body parts in the sweep of the seat. G
WARNING
If head restraints are not installed and
adjusted correctly, they cannot provide
protection as intended. There is an increased
risk of injury in the head and neck area, e.g.
in the event of an accident or when braking.
Always drive with the head restraints
installed. Befor edriving off, make sure for
every vehicle occupant that the center of the
head restraint supports the back of the head
at about eye level. G
WARNING
The seat belt does not offer the intended level
of protection if the backrest is not in the
upright position .When braking or in the event
of an accident, you could slide underneath the
seat belt and sustain abdomen or neck
injuries, for example. This poses an increased
risk of injury or even fatal injury.
Adjust the seat properly before beginning
your journey. Always make sure that the seat
is in the upright position. G
WARNING
According to accident statistics, children are
safer when properly restrained on the rear
seats than on the front-passenger seat. Thus,
we strongly recommendt hat children be
placed in the rear seat whenever possible.
Regardless of seating position, children 12
years old and under must be seated and Seats
99Seats, steering wheela nd mirrors
Z

properly secured in an appropriately sized
child restraint system or booster seat
recommended for the size and weight of the
child. For additional information ,see the
"Children in the vehicle" section.
Ac hild's risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and/
or the child is not properly secured in the child
restraint.
! To avoid damage to the seats and the seat
heating, observe the following information:
R keep liquids from spilling on the seats. If
liquidiss pilled on the seats, dry them as
soon as possible.
R if the seat covers are damp or wet, do not
switch on the seat heating. The seat
heating should also not be used to dry
the seats.
R clean the seat covers as recommended;
see "Interior care".
R do not transport heavy loads on the
seats. Do not place sharp objectsont he
seat cushions, e.g. knives, nails or tools.
The seats should only be occupied by
passengers, if possible.
R when the seat heating is in operation, do
not cover the seats with insulating
materials, e.g. blankets, coats, bags,
seat covers, child seats or booster seats.
! Make sure that there are no objectsint he
footwell or behind the seats when resetting
the seats. There is arisk that the seats
and/or the objectsc ould be damaged.
i The head restraintsint he front seats are
installed with the NECK-PRO system
(Y page 53). For this reason, it is not
possible to remove the head restraints
from the front seats.
For more information ,contact aqualified
specialist workshop.
i Further related subjects: Adjusting the seats
001A
Head restraint height
0010 Seat cushion angle
0024 Seat height
0021 Seat fore-and-aft adjustment
001E Backrest angle
i If PRE-SAFE ®
is triggered, the front-
passenger seat will be moved to abetter
position if it was previously in an
unfavorable position.
i You can store the seat settings using the
memory function (Y page 112).
i Vehicles with the through-loading
feature: if you fold down arear seat
backrest, the respective front seat is
moved forwards slightly in order to avoid
contact. Adjusting the head restraints
Important safety notes G
WARNING
You could lose control of your vehicle if you
do the following while driving:
R adjust the driver's seat, head restraint,
steering wheel or mirrors
R fasten the seat belt
There is arisk of an accident.
Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before startingt he engine.100
SeatsSeats, steering wheela
nd mirrors