engine MERCEDES-BENZ CLS COUPE 2008 User Guide

Occupant safety
43In particular, work relevant to safety or on
safety-related
systems must be carried out
at a qualified specialist workshop. If this
work is not carried out correctly, the oper-
ating safety of your vehicle may be affec-
ted. There is a risk of an accident and injury. SRS (Supplemental Restraint System)
The SRS reduces the risk of occupants com-
ing into contact with the vehicle's interior in
the event of an accident. It can also reduce
the forces to which occupants are exposed
during an accident.
The SRS consists of:
R 1 warning lamp
R belt tensioners
R belt force limiters
R Airbags
1 warning lamp The SRS functions are checked regularly
when you turn on the ignition and when the
engine

is running. Malfunctions can therefore
be detected in good time. The 1 warning lamp in the instrument
cluster

lights up when the ignition is switched
on. It goes out no later than a few seconds
after the engine is started. G
Risk of injury
If SRS is malfunctioning, individual systems
may be activated unintentionally or not be
triggered in the event of an accident with
heavy braking.
A malfunction has occurred if the 1
warning lamp:
R does

not light up when you switch on the
ignition
R does not go out after the engine has been
running for a few seconds
R lights up again once the engine is running
In this case, have SRS checked immedi-
ately at a qualified specialist workshop.
Triggering of belt tensioners, belt force
limiters and airbags In the event of a collision, the sensor in the
airbag

control unit evaluates important phys-
ical data such as duration, direction and force
of the vehicle deceleration or acceleration.
Based on the evaluation of this data and depending on the vehicle's rate of longitudi-
nal deceleration in a collision, in the first
stage the airbag control unit pre-emptively
triggers the belt tensioners.
i
The

front belt tensioners can only be trig-
gered if the belt tongue is correctly
engaged in the seat belt buckle.
The front airbags are only deployed if there is
an even higher rate of vehicle deceleration in
a longitudinal direction.
Vehicles fitted with adaptive, dual-stage front
airbags: when the first deployment threshold
is reached, the front airbag is filled with
enough gas to reduce the risk of injuries. The
front airbag is only fully inflated if a second
threshold is reached within a few millisec-
onds due to the control unit having detected
further deceleration.
Criteria for triggering belt tensioners and
airbags
In the first stage of a collision, the airbag con-
trol unit evaluates the duration and direction
of vehicle acceleration or deceleration in
order to determine whether it is necessary to
trigger the belt tensioner and/or airbag.
The belt tensioner and airbag triggering
thresholds are variable and are adapted to the
rate of deceleration of the vehicle. This proc- Safety
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Occupant safety
44
ess is pre-emptive in nature as the airbag
must
be deployed during – and not at the end
of – the collision.
i Airbags are not deployed in all types of
accidents. They are controlled by complex
sensor technology and evaluation logic.
This process is pre-emptive in nature as
airbag deployment must take place during
the impact and must be adapted to provide
calculated, additional protection for the
vehicle occupants. Not all airbags are
deployed in an accident.
The different airbag systems work inde-
pendently of each other. However, the
deployment of each individual system will
depend on the type of accident determined
by the control system in the first stages of
the collision (head-on collision, side impact
and overturn) and the extent of the acci-
dent (in particular, the vehicle's rate of
deceleration or acceleration).
The rate of vehicle deceleration or accelera-
tion and the direction of the force are basi-
cally determined by:
R the distribution of forces during the colli-
sion
R the collision angle R
the deformation characteristics of the vehi-
cle
R the characteristics of the object with which
the vehicle has collided, e.g. the other vehi-
cle
Factors which can only be seen and measured
after the collision has taken place do not play
a decisive role in the deployment of an airbag,
nor do they provide an indication of it.
The vehicle may be deformed significantly,
e. g. on the bonnet or the wing, without an
airbag being deployed. This happens if only
parts which are relatively easily deformed are
affected and the necessary deceleration does
not occur. Conversely, airbags may be
deployed even though the vehicle suffers only
minor deformations. This is the case if, for
example, very rigid vehicle parts such as lon-
gitudinal body members are affected and suf-
ficient deceleration occurs as a result.
Belt tensioners, belt force limiters The front seat belts and the outer seat belts
in

the rear are equipped with belt tensioners.
! Do not engage the seat belt tongue in the
buckle on the front-passenger seat if the
seat is not occupied. Otherwise the belt tensioner could be activated in an emer-
gency.
If the seat belt is also equipped with a belt
force limiter, the force exerted by the seat
belt on the seat occupant is reduced.
Belt tensioners tighten the seat belts in an
accident,

pulling them close against the body.
i Belt tensioners do not correct incorrect
seat positions or incorrectly fastened seat
belts.
Belt tensioners do not pull occupants back
towards the backrest.
The front belt force limiters are synchronised
with the front airbags, which spread the
forces exerted by the belt force limiters on
the occupant over a greater area.
When the ignition is switched on, the belt ten-
sioner is triggered:
R only if the restraint systems are operational
(the 1 warning lamp lights up after the
ignition is switched on and goes out once
the engine is running)(Y page 43)
R for each three-point seat belt in the front of
the vehicle when the belt tongue is
engaged in the buckle
R In the event of a head-on or rear-end colli-
sion if the vehicle decelerates or acceler- Safety
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Driving safety systems
59ESP
®
(Electronic Stability Program)
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, if
necessary, to keep the vehicle on the desired
course within the scope of the laws of phys-
ics. ESP ®
assists the driver when pulling away
on wet or slippery roads. ESP ®
can also sta-
bilise the vehicle during braking.
When ESP ®
intervenes, the v warning
lamp flashes in the instrument cluster. G
Risk of accident
If the v
warning lamp in the instrument
cluster flashes, proceed as follows:
R
Do not deactivate ESP ®
under any cir-
cumstances.
R Only depress the accelerator pedal as far
as necessary when pulling away.
R Adapt your driving style to suit the pre-
vailing road and weather conditions.
The vehicle could otherwise go into a skid. ESP
®

cannot reduce the risk of an accident
if you drive too fast. ESP ®
cannot override
the laws of physics.
! If the vehicle is to be towed with the front
or rear axle raised, the ignition must be
switched off (key in position 0 or 1 in the
ignition lock). Application of the brakes by
ESP ®
could otherwise destroy the brake
system on the front or rear axle.
i Only use wheels with the recommended
tyre sizes. Only then will ESP ®
function
properly.
To deactivate/activate ESP ® ESP
®
is activated automatically when the
engine is running.
It may be best to deactivate ESP ®
in the fol-
lowing situations:
R when using snow chains
R in deep snow
R on sand or gravel G
Risk of accident
Activate ESP ®
as soon as the situations
described
above no longer apply. ESP ®
will
otherwise not be able to stabilise the vehi-
cle if the vehicle starts to skid or a wheel
starts to spin.
If you deactivate ESP ®
:
R ESP ®
no longer improves driving stability
R Engine torque is not limited and the drive
wheels are able to spin. The spinning
wheels produce a cutting effect for better
traction.
R traction control is still activated.
R ESP ®
still provides support when you
brake.
i If ESP ®
is deactivated and one or more
wheels start to spin, the v warning lamp
in the instrument cluster flashes. ESP ®
does not, stabilise the vehicle. Safety
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Driving safety systems
601
To deactivate/activate ESP ®
X To deactivate: press button 1.
The v warning lamp in the instrument
cluster lights up.
G Risk of accident
If the v warning lamp in the instrument
cluster is permanently lit when the engine
is running, ESP ®
is deactivated or not avail-
able due to a malfunction. The risk of your
vehicle skidding is then increased in certain
situations.
You should always adapt your driving style
to suit the prevailing road and weather con-
ditions. X
To activate: press button 1.
The v warning lamp in the instrument
cluster goes out.
EBV (electronic brake-power distribu-
tion)
EBV monitors and controls the brake pres-
sure on the rear wheels to improve driving
stability under braking.
G Risk of accident
If EBV is malfunctioning, the brake system
is still available with full brake boosting
effect. However, the rear wheels can still
lock, e.g. under full braking. This could
cause you to lose control of your vehicle
and cause an accident. You should there-
fore adapt your driving style to the different
handling characteristics.
ADAPTIVE BRAKE
Due to its higher level of braking safety,
ADAPTIVE BRAKE offers exceptional braking
comfort. In addition to the braking function,
ADAPTIVE BRAKE also features the conveni-
ence function HOLD (Y page 144). For fur-
ther information, see Driving tips
(Y page 206).
Safety
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Anti-theft systems
61Anti-theft systems
Immobiliser
The immobiliser prevents your vehicle from
being started without the correct key.
Activating the immobiliser X
With the key: remove the key from the
ignition lock.
X With KEYLESS GO*: press the KEYLESS
GO button on the selector lever.
The engine switches off.
Deactivating the immobiliser X
With the key: turn the key to position 2 in
the ignition lock.
X With KEYLESS GO*: press the KEYLESS
GO button on the selector lever twice with-
out depressing the brake.
i The immobiliser is always deactivated
when you start the engine. ATA* (anti-theft alarm system)
A visual and audible alarm is triggered if the
alarm system is primed and you open:
R a door
R a door using the emergency key element
R the boot lid
R the bonnet
The alarm is not switched off even if you close
an open door again. 1
Indicator lamp
X To prime: lock the vehicle using the key.
On vehicles with KEYLESS GO*, the locking button on the door handle/boot lid can also
be used.
Indicator lamp 1 flashes. The alarm sys-
tem is primed after approximately 15 sec-
onds.
X To deactivate: unlock the vehicle using the
key. On vehicles with KEYLESS GO*, you
can also unlock the vehicle by opening the
door/boot lid.
Switching off the alarm X
With the key: insert the key into the igni-
tion lock.
The alarm is switched off.
or
X Press the Œ or ‹ button on the key.
The alarm is switched off.
X With KEYLESS GO*: pull the door handle.
The key must be outside the vehicle.
The alarm is switched off.
or
X Press the KEYLESS GO button on the selec-
tor lever. The key must be inside the vehi-
cle.
The alarm is switched off. Safety
* optional
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Opening and closing
67
X
To change the setting: press the k
and j buttons simultaneously for
approximately six seconds until the battery
check lamp flashes twice.
The key now functions as follows:
X To unlock the driver's door: press the
k button once.
X To unlock centrally: press the k but-
ton twice.
X To lock centrally: press the j button.
Restoring the factory settings X
Press the k and j buttons simulta-
neously for approximately six seconds until
the battery check lamp flashes twice. KEYLESS GO*
If you are carrying the KEYLESS GO key on
your person, you can use the KEYLESS GO
functions of your vehicle. The KEYLESS GO
key should not be more than one metre away
from the vehicle. However, you can also use
the KEYLESS GO key like a normal key with
remote control.
When you pull the door handle, the following
unlock centrally if the factory settings have
not been changed:
R the doors
R the boot lid
R the fuel filler flap G
Risk of accident
Never leave children unsupervised in the
vehicle. They could open a door from the
inside at any time, even if it has been
locked. Or they could start the vehicle if a
valid KEYLESS GO key is in the vehicle and
they press the KEYLESS GO button on the
gear selector lever. They could endanger
themselves and others. Switch off the
engine and take the KEYLESS GO key with
you, even if you are only leaving the vehicle
for a short time. 1
j Locking button
2 i Unlocking button for the boot lid
3 k Unlocking button
4 Battery check lamp
i You can also use the KEYLESS GO key to
open and close the side windows and slid-
ing/tilting sunroof* . You can open them
using the summer opening feature
(Y page 100). You can close them using
the convenience closing feature
(Y page 100).
i If the vehicle has been parked for a long
time, you must pull the door handle to acti-
vate the KEYLESS GO functions. Controls
* optional
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Opening and closing
68
Important notes R
If the KEYLESS GO key is removed from the
vehicle (in luggage or an article of clothing,
for instance), it will no longer be possible
to lock or start the vehicle.
R If the KEYLESS GO key is removed from the
vehicle while the engine is running, e.g. if
the front passenger leaves the vehicle with
the KEYLESS GO key, the following mes-
sage will appear in the multi-function dis-
play as you pull away: Key not detec-
ted.
R If the KEYLESS GO key is in the vehicle, the
vehicle can be started at any time. If you
have left the KEYLESS GO key in the vehi-
cle, you will see the following message in
the multi-function display when you lock
the vehicle: Key still in vehicle.
Factory settings X
To unlock centrally: pull the door handle.
The turn signals flash once. The locking
knobs in the doors pop up. The anti-theft
alarm system* is deactivated.
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer. i
If you do not open either a door or the
boot lid after you have unlocked the vehi-
cle, it will automatically relock after approx-
imately 40 seconds.
i When a door is opened, the side window
on that side opens slightly. When the door
is closed, the side window closes again.
! The side windows will not open or close
if the battery is discharged or if the side
windows have iced up. It will not be possi-
ble to close the door. Do not attempt to
force the door closed. You could otherwise
damage the door or the window.
i There is a danger of the vehicle being
unlocked accidentally. This could happen if
the KEYLESS GO key is within one metre of
the vehicle and the door handle is splashed
by water. This could also happen when you
are cleaning the door handle. 1
Locking button on the door handle
X To lock centrally: press locking button
1 on the door handle.
The turn signals flash three times. The lock-
ing knobs in the doors drop down. The anti-
theft alarm system* and the immobiliser
are primed.
Individual settings You can change the setting of the locking
system. When you now grasp the door handle
on the driver's door, you will only unlock the
driver's door and the fuel filler flap. This is
useful if you frequently travel on your own.
X
To change the setting: press the k
and j buttons simultaneously for Controls
* optional
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Opening and closing
70 Locking/unlocking the vehicle from
the inside
You can centrally lock or unlock the vehicle
from the inside. This feature may be useful if,
for example, you wish to unlock the front-
passenger door from the inside or lock the
vehicle before you pull away. G
Risk of accident
Do not leave children unsupervised in the
vehicle. They could open a door from the
inside – even if it is locked – and thereby
endanger themselves and others.1 Unlocking button
2 Locking button
X To unlock: press button 1.
X To lock: press button 2.
Boot (vehicles without remote boot
lid closing feature*)
G Risk of poisoning
Exhaust fumes could enter the vehicle inte-
rior if the engine is running and the boot lid
is open. This could poison you. Therefore,
you should make sure that the boot lid is
always closed when the engine is running.
! The boot lid swings upwards when
opened. Therefore, make sure that there is
enough space above the boot lid.
Opening from the outside
You can only open the boot lid after unlocking
it first.
X To unlock centrally: press the k but-
ton on the key.
1 Handle
X Pull handle 1.
X Raise the boot lid.
Opening from the outside using the key
You can unlock and open the boot lid simul-
taneously with the key when the vehicle is
stationary.
X Press and hold the i button on the key
until the boot lid opens.
Closing from the outside
G Risk of injury
Make sure that nobody can become trap-
ped as you close the boot lid.
Controls
* optional
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Opening and closing
72 Boot (vehicles with remote boot lid
closing feature*)
The remote boot lid closing feature* opens
and closes the boot lid automatically. You can
stop the automatic opening and closing pro-
cedure at any time:
R by pulling or pressing the remote operating
switch at the driver's seat
R by pressing the i button on the key
R by pulling the handle on the boot lid
R by pressing the closing button in the boot
lid G
Risk of poisoning
Exhaust fumes could enter the vehicle inte-
rior if the engine is running and the boot lid
is open. This could poison you. Therefore,
you should make sure that the boot lid is
always closed when the engine is running.
! The boot lid swings upwards when
opened. Therefore, make sure that there is
enough space above the boot lid.
Opening from the outside You can only open the boot lid after unlocking
it first. X
To unlock centrally: press the k but-
ton on the key. 1
Handle
X Pull handle 1.
The boot lid opens.
Opening from the outside using the key You can unlock and open the boot lid simul-
taneously with the key when the vehicle is
stationary.
X
Press and hold the i button on the key
until the boot lid opens. Closing from the outside (without KEY-
LESS GO*) You can close the boot lid from the outside
using the closing button in the boot lid.
G
Risk of injury
Monitor the boot lid closing procedure to
make sure that nobody can become trap-
ped. Press the closing button in the boot lid
again or press the i button on the key
to halt the closing procedure.
i Do not leave the key in the boot. You
could otherwise lock yourself out. 1
Closing button
X Press closing button 1.
The boot lid closes automatically. Controls
* optional
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Key positions
74 Key positions
KeyIgnition lock
}
To remove the key
$ Power supply for some consumers, such
as the windscreen wipers
% Ignition (power supply for all consumers)
and drive position
& To start the engine
KEYLESS GO*
If you press the KEYLESS GO button repeat-
edly without depressing the brake pedal, its
function corresponds to the different key
positions in the ignition lock.
If you depress the brake pedal and press the
KEYLESS GO button, the engine starts imme-
diately.
i In order for the engine to be started using
the KEYLESS GO button, the KEYLESS GO
key must be in the vehicle.
i If there is a key in the ignition lock, it has
priority over the KEYLESS GO function.
1 KEYLESS GO button If KEYLESS GO button
1 has not yet been
pressed, this corresponds to "key removed"
or position 0 .
X Position 1: press KEYLESS GO button 1
once.
It is now possible to switch on the wind-
screen wipers, for example.
i If you now press KEYLESS GO button 1
twice, the power supply is disconnected
again.
X Position 2 (ignition): press KEYLESS GO
button 1 twice.
i If you now press KEYLESS GO button 1
once, the power supply is disconnected
again.
Controls
* optional
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