2016 MERCEDES-BENZ S CLASS lights

Problems with the Occupant Classification System (OCS) Be sure to observe the notes on "System self-test" ( Y
page 56).
Problem
Possible causes/consequences and P Solutions
The PASSENGER AIR
BAG OFF indicator lamp
lights up and remains lit,
even though the front-
passenger seat is occu-
pied by an adult or a per-
son of a stature corre-
sponding to that of an
adult. The classification of the person on the front-passenger seat is incor-
rect. X
Make sure the conditions for a correct classification of the person
on the front-passenger seat are met ( Y
page 53).X
If the PASSENGER AIR BAG OFF indicator lamp remains lit, the front-
passenger seat may not be used. X
Have OCS checked as soon as possible at an authorized Mercedes-
Benz Center.
The PASSENGER AIR
BAG OFF indicator lamp
does not light up and/or
does not stay on.
The front-passenger seat
is: R
unoccupied R
occupied with the
weight of a child up to
twelve months old in a
child restraint system OCS is malfunctioning. X
Make sure there is nothing between the seat cushion and the child
seat. X
Make sure that the entire base of the child restraint system rests on
the seat cushion of the front-passenger seat. The backrest of the
forward-facing child restraint system must lie as flat as possible
against the backrest of the front-passenger seat. If necessary,
adjust the position of the front-passenger seat. X
Make sure that the seat cushion length is fully retracted. X
When installing the child restraint system, make sure that the seat
belt is tight. Do not pull the seat belt tight using the front-passenger
seat adjustment. This could result in the seat belt and the child
restraint system being pulled too tightly. X
Check for correct installation of the child restraint system.
Make sure that the head restraint does not apply a load to the child
restraint system. If necessary, adjust the head restraint accord-
ingly. X
Make sure that no objects are applying additional weight onto the
seat. X
If the PASSENGER AIR BAG OFF indicator lamp remains off and/or
the PASSENGER AIR BAG ON indicator lamp lights up, do not install
a child restraint system on the front-passenger seat. It is recom-
mended that you install the child restraint system on a suitable rear
seat. X
Have OCS checked as soon as possible at an authorized Mercedes-
Benz Center.
Deployment of Emergency Tensioning
Devices and air bags
Important safety notes
G WARNING
The air bag parts are hot after an air bag has
been deployed. There is a risk of injury. Do not touch the air bag parts. Have a
deployed air bag replaced at a qualified spe-
cialist workshop as soon as possible.
G WARNING
A deployed air bag no longer offers any pro-
tection and cannot provide the intended pro-Occupant safety 57
Safety Z

tection in an accident. There is an increased
risk of injury.
Have the vehicle towed to a qualified special-
ist workshop in order to have a deployed air
bag replaced.
It is important for your safety and that of your
passenger to have deployed air bags replaced
and to have any malfunctioning air bags
repaired. This will help to make sure the air bags
continue to perform their protective function for
the vehicle occupants in the event of a crash.
G WARNING
Pyrotechnic Emergency Tensioning Devices
that have been deployed are no longer opera-
tional and are unable to perform their inten-
ded protective function. This poses an
increased risk of injury or even fatal injury.
Therefore, have pyrotechnic Emergency Ten-
sioning Devices which have been triggered
immediately replaced at a qualified specialist
workshop.
An electric motor is used by PRE-SAFE ®
to trig-
ger the tightening of the seat belt in hazardous
situations. This procedure is reversible.
If Emergency Tensioning Devices are triggered
or air bags are deployed, you will hear a bang,
and a small amount of powder may also be
released. The u restraint system warning
lamp lights up.
Only in rare cases will the bang affect your hear-
ing. The powder that is released generally does
not constitute a health hazard, but it may cause
short-term breathing difficulties in people with
asthma or other respiratory problems. Provided
it is safe to do so, you should leave the vehicle
immediately or open the window in order to pre-
vent breathing difficulties.
Air bags and pyrotechnic Emer gency T ensioning
De
vices (ETDs) contain perchlorate material,
which may require special handling and regard
for the environment. National guidelines must
be observed during disposal. In California, see
www.dtsc.ca.gov/HazardousWaste/
Perchlorate/index.cfm . Method of operation During the first stage of a collision, the restraint
system control unit evaluates important physi-
cal data relating to vehicle deceleration or accel-
eration, such as: R
duration R
direction R
intensity
Based on the evaluation of this data, the
restraint system control unit triggers the Emer-
gency Tensioning Devices during a frontal or
rear collision.
An Emergency Tensioning Device can only be
triggered, if: R
the ignition is switched on R
the components of the restraint system are
operational. You can find further information
under: "Restraint system warning lamp"
( Y
page 45) R
the belt tongue is engaged in the buckle on
the respective front-passenger seat
The Emergency Tensioning Devices in the rear
compartment are triggered independently of the
lock status of the seat belts.
Vehicles with belt bags: the belt bags are also
deployed depending on the type and severity of
the accident.
Vehicles with a rear reclining seat: the Emer-
gency Tensioning Device is only triggered if the
belt buckle tongue is engaged in the belt buckle.
If the seat backrest is reclined, the cushion air
bag will also be deployed depending on the type
a nd severity of the accident.
If the restraint system control unit detects a
more severe accident, further components of
the restraint system are activated independ-
ently of each other in certain frontal collision
situations: R
Front air bags and driver's knee bag R
Window curtain air bag, if the system deter-
mines that deployment can offer additional
protection to that provided by the seat belt
The front-passenger front air bag is activated or
deactivated depending on the person on the
front-passenger seat. The front-passenger front
air bag can only deploy in an accident if the
PASSENGER AIR BAG ON indicator lamp is lit.
Observe the information on the PASSENGER AIR
BAG indicator lamps ( Y
page 46).58
Occupant safety
Safety

cle occupants. There is a risk of an accident
and injury.
Never leave animals unattended in the vehi-
cle. Always secure animals properly during
the journey, e.g. use a suitable animal trans-
port box.
Driving safety systems
Overview of driving safety systems In this section, you will find information about
the following driving safety systems: R
ABS ( A nti-lock B raking S ystem)
( Y
page 68)R
BAS ( B rake A ssist S ystem) ( Y
page 69)R
BAS PLUS ( B rake A ssist S ystem PLUS) with
Cross-Traffic Assist ( Y
page 69)R
COLLISION PREVENTION ASSIST PLUS
( Y
page 71)R
ESP ®
( E lectronic S tability P rogram)
( Y
page 73)R
EBD ( E lectronic B rake force D istribution)
( Y
page 75)R
ADAPTIVE BRAKE ( Y
page 75)R
PRE-SAFE ®
Brake ( Y
page 75)R
STEER CONTROL ( Y
page 77)
Important safety notes If you fail to adapt your driving style or if you are
inattentive, the driving safety systems can nei-
ther reduce the risk of an accident nor override
the laws of physics. Driving safety systems are
merely aids designed to assist driving. You are
responsible for maintaining the distance to the
vehicle in front, for vehicle speed, for braking in
good time, and for staying in lane. Always adapt
your driving style to suit the prevailing road and
weather conditions and maintain a safe distance
from the vehicle in front. Drive carefully.
The driving safety systems described only work
as effectively as possible when there is ade-
quate contact between the tires and the road
surface. Pay particular attention to the informa-
tion regarding tires, recommended minimum
tire tread depths etc. in the "Wheels and tires"
section ( Y
page 384). In wintry driving conditions, always use winter
tires (M+S tires) and if necessary, snow chains.
Only in this way will the driving safety systems
described in this section work as effectively as
possible.
ABS (Anti-lock Braking System)
General information ABS regulates brake pressure in such a way that
the wheels do not lock when you brake. This
allows you to continue steering the vehicle when
braking.
The % ABS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out when the engine is running.
ABS works from a speed of about 5 mph
(8 km/h), regardless of road-surface conditions.
ABS works on slippery surfaces, even when you
only brake gently.
Important safety notes
i Observe the "Important safety notes" sec-
tion ( Y
page 68).
G WARNING
If ABS is faulty, the wheels could lock when
braking. The steerability and braking charac-
teristics may be severely impaired. Addition-
ally, further driving safety systems are deac-
tivated. There is an increased danger of skid-
ding and accidents.
Drive on carefully. Have ABS checked imme-
diately at a qualified specialist workshop.
When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp ( Y
page 316) and dis-
play messages which may be shown in the
instrument cluster ( Y
page 278).
Braking X
If ABS intervenes: continue to depress the
brake pedal vigorously until the braking sit-
uation is over. X
To make a full brake application: depress
the brake pedal with full force.68
Driving safety systems
Safety

X
To unlock centrally: press the 6 button.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking: R
the vehicle is locked again. R
anti-theft protection is reactivated. X
To lock centrally: press the 7 button.
The SmartKey centrally locks and unlocks the
following components: R
the doors R
the trunk lid R
the fuel filler flap
The turn signals flash once when unlocking and
three times when locking.
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated and deactivated via the
multimedia system; see the separate operating
instructions.
You will receive visual and acoustic locking con-
firmation if all components were able to be
locked.
When the locator lighting is activated via the
multimedia system, it lights up when it is dark
after the vehicle is unlocked with the SmartKey.
Information on activating and deactivating the
locator lighting can be found in the separate
operating instructions. X
To open the trunk lid automatically from
outside the vehicle: press and hold the T
button until the trunk lid opens. X
To open the trunk lid automatically from
outside the vehicle: if the SmartKey is loca-
ted in the immediate vicinity of the vehicle ,
p
ress the T button on the SmartKey.
When the trunk lid closes you can then
release the button.
KEYLESS-GO
General notes
Bear in mind that the engine can be started by
any of the vehicle occupants if there is a Smart-
Key in the vehicle ( Y
page 164).
Locking/unlocking centrally
You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you only need carry the
SmartKey with you. You can combine the func- tions of KEYLESS-GO with those of a conven-
tional SmartKey. Unlock the vehicle by using
KEYLESS-GO, for instance, and lock it using the
7 button on the SmartKey.
The driver's door and the door at which the han-
dle is used, must both be closed. The SmartKey
must be outside the vehicle. When locking or
unlocking with KEYLESS-GO, the distance
between the SmartKey and the corresponding
door handle must not be greater than 3 ft (1 m).
A brief radio connection between the vehicle
and the SmartKey determines whether a valid
SmartKey is in, or in the direct vicinity of, the
vehicle. This occurs, for example: R
when starting the engine R
while driving R
when using HANDS-FREE ACCESS R
when the external door handles are touched R
during convenience closing
X
To unlock the vehicle: touch the inner sur-
face of the door handle. X
To lock the vehicle: touch sensor surface C
or D .
Make sure that you do not touch the inner
surface of the door handle. X
Convenience closing feature: touch
recessed sensor surface D for an extended
period.
Further information on the convenience clos-
ing feature ( Y
page 96). X
To unlock the trunk lid: pull the handle on
the trunk lid.
Deactivating and activating
If you do not intend to use a SmartKey for an
extended period of time, you can deactivate the
KEYLESS-GO function of the SmartKey. The
SmartKey will then use very little power, thereby80
SmartKey
Opening and closing

conserving battery power. For the purposes of
activation/deactivation, the vehicle must not be
nearby. X
To deactivate: press the 7 button on the
SmartKey twice in rapid succession.
The battery check lamp ( Y
page 82) of the
SmartKey flashes twice briefly and lights up
once, then KEYLESS-GO is deactivated . X
To activate: press any button on the Smart-
Key.
or X
Insert the SmartKey into the ignition lock.
KEYLESS-GO and all of its associated features
are available again.
KEYLESS-GO start function
General notes Bear in mind that the engine can be started by
any of the vehicle occupants if there is a Smart-
Key in the vehicle ( Y
page 164).
Changing the settings of the locking
system You can change the settings of the locking sys-
tem. This means that only the driver's door and
the fuel filler flap are unlocked when the vehicle
is unlocked. This is useful if you frequently travel
on your own. X
To change the setting: press and hold down
the 6 and 7 buttons simultaneously
for approximately six seconds until the bat-
tery check lamp flashes twice ( Y
page 82).
If the setting of the locking system is changed
within the signal range of the vehicle, pressing
the 7 or 6 button:R
locks or R
unlocks the vehicle
The SmartKey now functions as follows: X
To unlock: press the 6 button once.X
To unlock centrally: press the 6 button
twice. X
To lock: press the 7 button. The KEYLESS-GO function is changed as fol-
lows: X
To unlock the driver's door: touch the inner
surface of the door handle on the driver's
door. X
To unlock centrally: touch the inner surface
of the door handle on the front-passenger
door or the rear door. X
To lock centrally: touch the outer sensor
surface on one of the door handles. X
To restore the factory settings: press and
hold the 6 and 7 buttons simultane-
ously for approximately six seconds until the
battery check lamp flashes twice
( Y
page 82).
Mechanical key
General notes If the vehicle can no longer be locked or
unlocked with the SmartKey or KEYLESS-GO,
use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm sys-
tem will be triggered. Switch off the alarm
( Y
page 78).
If you unlock the vehicle using the mechanical
key, the fuel filler flap will not be unlocked auto-
matically. X
To unlock the fuel filler flap: insert the
SmartKey into the ignition lock.
Removing the mechanical key
X
Push release catch C in the direction of the
arrow and at the same time remove mechan-
ical key D from the SmartKey.SmartKey 81
Opening and closing Z

For further information about: R
unlocking the driver's door ( Y
page 87)R
unlocking the trunk ( Y
page 93)R
locking the vehicle ( Y
page 88)
Inserting the mechanical key X
Push mechanical key D completely into the
SmartKey until it engages and release
catch C is back in its basic position.
SmartKey battery
Important safety notes
G WARNING
Batteries contain toxic and corrosive substan-
ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatal
injury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention
immediately.
H Environmental note
Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be collected separately
and recycled to protect the
environment.
Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
collection point for used bat-
teries.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm . Mercedes-Benz recommends that you have the
batteries replaced at a qualified specialist work-
shop.
Checking the battery X
Press the 7 or 6 button.
The battery is working properly if battery
check lamp C lights up briefly.
The battery is discharged if battery check
lamp C does not light up briefly. X
Change the battery ( Y
page 82).
If the SmartKey battery is checked within the
signal reception range of the vehicle, pressing
the 7 or 6 button: R
locks or R
unlocks the vehicle
i You can obtain a battery from any qualified
specialist workshop.
Replacing the battery You require a CR 2025 3 V cell battery. X
Take the mechanical key out of the SmartKey
( Y
page 81).
X
Press mechanical key D into the SmartKey
opening in the direction of the arrow until bat-82
SmartKey
Opening and closing

Adjusting the front-passenger seat
fr om the driver’s seat
Import ant safety notes
G WARNIN G
When you adjust a seat , you or other vehicl e
occupant s could become trapped , e.g. on th e
seat guide rail. There is a ris k of injury.
Mak e sur e when adjusting a seat that no on e
has any body part s in th e swee p of th e seat .
Observ e th e safet y note s on "Ai r bags "
( Y
page 50 ) and "Children in th e vehicle"
( Y
page 61) .
G WARNIN G
The front-air bags for could also injure th e
vehicl e occupant s in th e fron t If th e fron t
seat s are positioned to o close to th e dash -
boar d or steering wheel. This poses an
increased ris k of injury or eve n fatal injury.
Always adjust th e fron t seat s so that they are
as far from th e fron t air bags as possible. Als o
observ e th e note s on th e correc t adjustmen t
of th e seats.
G WARNIN G
Children could become trapped if they adjust
th e seats, particularly when unattended.
There is a ris k of injury.
When leaving th e vehicle, always tak e th e
SmartKey wit h you and loc k th e vehicle. Never
leav e children unsupervised in th e vehicle.
! Do no t mov e th e front-passenger seat fully
forward s if there are objects in th e parcel ne t
in th e front-passenger footwell. The objects
could otherwise be damaged. Adjusting the front-passenger seat
The SmartKey mus t be in th e ignition loc k and in
position 1 or 2 , in order for th e front-passenger
seat to be selected ( Y
page 162).X
To select th e front-passenger seat: press
butto n C repeatedly until th e indicator lamp
in th e butto n lights up.
When th e indicator lamp in butto n C lights up,
for th e front-passenger seat you can adjust :R
adjust th e seat ( Y
page 106)R
seat heating ( Y
page 118) R
seat ventilation ( Y
page 119)R
th e memory function to call up or sav e set -
ting s ( Y
page 126).
Adjusting the front-passenger seat
fr om the rear
Imp ort ant safety notes
G WARNIN G
Children could become trapped if they adjust
th e seats, particularly when unattended.
There is a ris k of injury.
When leaving th e vehicle, always tak e th e
SmartKey wit h you and loc k th e vehicle. Never
leav e children unsupervised in th e vehicle.
The seat s can still be adjusted when there is no
SmartKey in th e ignition lock.
G WARNIN G
When you adjust a seat , you or other vehicl e
occupant s could become trapped , e.g. on th e
seat guide rail. There is a ris k of injury.108
Seats
Seats, steering wheel and mirrors

Positioning the front-passenger seat for
chauffeur mode General notes Pay attention to the important safety notes
( Y
page 111). Adjust the seat for chauffeur
mode before the journey ( Y
page 112). Do not
remove the front-passenger seat head restraint
during the journey.
Adjusting from the rear compartment
You can use the override button to disable this
function ( Y
page 67).
In order for the front-passenger seat to be posi-
tioned in chauffeur mode: R
the SmartKey must be in the ignition lock and
in position 1 or 2 ( Y
page 162)R
the front-passenger seat may not be occupied R
the front-passenger seat belt must not be
inserted into the buckle X
To select the front-passenger seat: press
button C repeatedly until the indicator lamp
in the button lights up.
The front-passenger seat is selected if the
indicator lamp in the button lights up. X
Press button D forwards and hold it in this
position.
The seat moves forward.
The seat stops at the threshold of the area for
chauffeur mode. X
Release button D .X
Press and hold button D again until the front-
passenger seat is in position for chauffeur
mode.
The head restraint on the front-passenger
seat folds forwards. The seat moves forward.
The To view the ext. mirror, adjust
front-passenger seat or remove the head restraint. message appears in the
multifunction display ( Y
page 310).
i If the front-passenger seat is already at the
threshold to the area for the chauffeur mode,
the position for the chauffeur mode is set
immediately.
i The position for chauffeur mode can be
saved or set using the memory function of the
rear seat ( Y
page 127). For this the indicator
lamp on button C must be lit.
Adjusting from the driver's seat
In order for the front-passenger seat to be posi-
tioned in chauffeur mode: R
the SmartKey must be in the ignition lock and
in position 1 or 2 ( Y
page 162)R
the front-passenger seat may not be occupied R
the front-passenger seat belt must not be
inserted into the buckle X
To select the front-passenger seat: press
button C repeatedly until the indicator lamp
in the button lights up.
The front-passenger seat is selected if the
indicator lamp in the button lights up. X
Press button D forward and hold it.
The seat moves forward.
The seat stops at the threshold of the area for
chauffeur mode. X
Release button D .X
Press and hold button D again until the front-
passenger seat is in position for chauffeur
mode.
The head restraint on the front-passenger
seat folds forwards. The seat moves forward.
The To view the ext. mirror, adjust
front-passenger seat or remove the
head restraint. ( Y
page 310)message
appears in the multifunction display.112
Seats
Seats, steering wheel and mirrors