
Re
stra int sy stem functionality When
the ignition is switched on, a sy stem self-
te st is per form ed, during which the6
re stra int sy stem warning lamp lights up. It goes
out no later than a few seconds af terth eve hicle
is star ted. The components of there stra int sys‐
te m are then functional. Re
stra int sy stem malfunction R
The 6 restra int sy stem warning lamp
does not light up when the ignition is
switched on.
R The 6 restra int sy stem warning lamp
lights up continuously or repeatedly during a
journe y. &
WARNING Risk of inju ryor fata l injury
due toa malfunction in there stra int sys‐
tem
If th ere stra int sy stem is malfunctioning,
re stra int sy stem components may be trig‐
ge red unintentionally or might not be trig‐
ge red at all in theev ent of an accident. This may af
fect the seat belt tensioner or airbag,
fo rex ample. #
Have there stra int sy stem checked and
re paired immediately at a qualified spe‐
cialist workshop. Fu
nction of there stra int sy stem in an acci‐
dent How
there stra int sy stem works is de term ined by
th e se verity of the impact de tected and the type
of accident anticipated:
R Frontal impact
R Rear impact
R Side impact
R Rollover
The activation thre sholds forth e components of
th ere stra int sy stem are de term ined based on
th eev aluation of the sensor values measured at
va rious points in theve hicle. This process is pre-
em ptive in nature. The triggering/deployment of
th e components of there stra int sy stem should ta
ke place in good time at thest art of the colli‐
sion.
Fa ctors whi chcan only be seen and measu red
af te r a collision has occur red cann otplay a deci‐
sive role in airbag deployment, nor do they pro‐
vide an indication of airbag deployment.
The vehicle may be deformed significantly with‐
out an airbag being deplo yed. This is the case if
only parts which are relatively easily deformed
are af fected and thera te ofvehicle deceleration
is not high. Con versely, an airbag may be
deplo yedev en though theve hicle suf fers only
minor deformation. If very rigid vehicle parts
such as longitudinal members are hit, forex am‐
ple, this may result in suf ficiently high le vels of
ve hicle deceleration. Occupant saf
ety31

PA
SSENGER AIR BAG indicator lamp
Sy stem self- test When
the ignition is switched on, a sy stem self-
te st is per form ed during which the two
PA SSENGER AIR BAG ON and OFF indicator
lamps light up simultaneousl y.The
status of the front passenger airbag is then
displa yed:
R PASSENGER AIR BAG ON lights up for
60 seconds, subsequently bo thindicator
lamps are off (PASSENGER AIR BAG ON and
OFF): the front passenger airbag is able to
deploy in theeve nt of an accident.
R PASSENGER AIR BAG OFF lights up continu‐
ously: the front passenger airbag is disabled.
It will then not be deplo yed in theev ent of an
accident.
If th ePA SSENGER AIR BAG ON indicator lamp is
off, on lythePA SSENGER AIR BAG OFF indicator
lamp sho wsthest atus of the front passenger
airbag. The PASSENGER AIR BAG OFF indicator
lamp may be lit continuously or be off.
If th ePA SSENGER AIR BAG OFF indicator lamp
and the6 restra int sy stem warning lamp
light up simultaneousl y,the front passenger seat
may not be used. Also in this case, do not ins tall
a ch ild restra int sy stem on the front passenger
seat. Ha vethe automatic front passenger airbag
shutoff checked and repaired immediately at a
qu alified specialist workshop. St
atus display
If th e front passenger seat is occupied, ensure,
bo th before and during the journe y,that thest a‐
tus of the front passenger airbag is cor rect for
th e pr evailing situation.
Af ter in stalling a rear wa rd-facing child
re stra int sy stem on the front passenger
seat: PASSENGER AIR BAG OFF must be lit con‐
tinuousl y. &
WARNING Risk of inju ryor death caused
by using a rear wa rd-facing child restra int
sy stem when the front passenger airbag
is enabled
If yo u secure a child in a rear wa rd-facing
ch ild restra int sy stem on the front passenger
seat and thePA SSENGER AIR BAG OFF indi‐
cator lamp is off, the front passenger airbag
can deploy in theeve nt of an accident.
The child could be stru ck bythe airbag.
Alw ays make sure that the front passenger
airbag is disabled. The PASSENGER AIR BAG
OFF indicator lamp must be lit. Occupant saf
ety41

R
Anti-theft pr otection is reactivated.
Do not keep theke yto get her with electronic
devices or me tal objects. This can af fect the
ke y's functionalit y.
% If battery check lamp 2does not light up
af te r pressing the% or& button, the
battery is dischar ged. Ac
tivating/deactivating the acoustic lo cking
ve rification signal Multimedia sy
stem:
, Vehicle .
î Vehicle set-
tings .
Acoustic lock #
Activate Oor deacti vate ª the function. Priming/deactivating
the panic ala rm Re
quirements:
R Ignition switched off. #
Toprime: press button 1for appro ximately
one second.
A visu al and audible alarm is triggered. #
Todeactivate: briefly press but ton1 again.
or #
Press thest art/ stop button on the cockpit
(the key is inside theve hicle). Changing
the unlocking settings Po
ssible unlocking functions of theke y:
R Central unlocking
R Unlocking the driver's door and fuel filler flap #
Toswitch between settings: pressthe
% and& buttons simultaneously for
appr oximately six seconds until the battery
ch eck lamp flashes twice.
If th e unlocking function forth e driver's door
and fuel filler flap has been selec ted:
R Pressing the% button a second time cen‐
trally unloc kstheve hicle.
R Vehicles with KEYLESS-GO: Ifyo uto uch
th e inner sur face of the door handle on the
driver's door, only the driver's door and fuel
fi ller flap are unlo cked. Re
ducing the energy consu mption of the key If
yo u do not intend touse theve hicle for an
ex tended pe riod of time, you can deactivate the
fo llowing functions on thekey.
R KEYLESS-GO starting function
R KEYLESS-GO Opening and closing
65

If
yo u open theta ilgate from outside it is auto‐
matically unloc ked. Problems with KEYLESS-GO
Problem
Possible causes/consequences and M
MSolutions
Yo u can no lon ger lock or unlock the
ve hicle using KEYLESS-GO. Po
ssible causes:
R KEYLESS-GO has been deactivated .
R The key bat tery is dischar ged or near lydischar ged.
R There is inter fere nce from a po werful radio signal source.
R The key is faulty. #
Activate KEYLESS-GO . #
Check the battery using the battery check lamp and replace if necessary . #
Use the emer gency keyto lock or unlock theve hicle . #
Have theve hicle and keych ecked at a qualified specialist workshop. Switching
the automatic locking feature
on/off The
vehicle is loc ked automatically when the
ignition is switched on and the wheels are turn‐
ing fast erthan walking pace. Opening and closing
71

Anti-theft pr
otection Immobiliser
The immobiliser pr
events your vehicle from
being star ted without the cor rect key.
The immobiliser is automatically activated when
th e ignition is switched off and deactivated when
th e ignition is switched on. ATA
(Anti-Theft Alarm sy stem) Fu
nction of theATA system (anti-theft ala rm
sy stem)
If th eATA system is primed, a visual and audible
alarm is triggered in thefo llowing situations:
R A door is opened.
R The tailgate is opened.
R The bonn etis opened.
R Interior pr otection is triggered. (→ page 89)
R Tow- aw ay protection is triggered.
(→ page 89) The
ATA system is primed automatically af ter
appr oximately 10seconds:
R After locking theve hicle with thekey.
R After locking theve hicle using KEYLESS-GO. When
theATA system is primed, indicator lamp
1 flashes.
The ATA sy stem is automatically deactivated:
R After unlocking theve hicle with thekey. R
After pressing thest art/ stop button with the
ke y inside theve hicle.
R After unlocking theve hicle using KEYLESS-
GO.
% When the Mercedes‑Benz emer gency call
sy stem is active and the alarm stay s on for
more than 30 seconds, a message is auto‐
matically sent tothe Cus tomer Assis tance
Centre (→ page 330).
Deactivating theATA (anti-theft ala rmsys‐
te m) ala rm #
Press the%, &orp button on the
key.
or #
Press thest art/ stop button (the SmartK eyis
inside theve hicle).
St opping the ala rmusing KEYLESS-GO #
Grasp the outside door handle (with thekey
outside theve hicle). 88
Opening and closing

Seats
Ad
justing the front seat manually and elec‐
trically (without Seat Comfort Package) &
WARNING Risk of becoming trapped if
th e seats are adjus tedby children
Children could become trapped if they adjust
th e seats, particularly when unattended. #
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle.
This also applies tomobile phones if the
"Digital Car Key in the smartphone"
function is activated via the Mercedes
connect me web App. #
Never lea vechildren unat tended in the
ve hicle. The seats can be adjus
ted when the ignition is
switched off. &
WARNING Risk of becoming trapped
when adjusting the seats
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the
seat guide rail. #
Make sure when adjusting a seat that
no one has any body parts in the sweep
of the seat. Obser
vethe saf ety no tes on "Airbags" and "Chil‐
dren in theve hicle". &
WARNING Risk of accident due tothe
driver's seat not being engaged
If th e driver's seat is not engaged, it could
mo veunexpectedly while theve hicle is in
motion.
This could cause youto lose control of the
ve hicle. #
Alw ays make sure that the driver's seat
is engaged before starting theve hicle. &
WARNING Risk of inju rythro ugh adjust‐
ing vehicle settings while theve hicle is in
motion
Yo u could lose cont rol of theve hicle in the
fo llowing situations:
R ifyo u adjust the driver's seat, the head
re stra ints, thesteering wheel or the mir‐
ro r while theve hicle is in motion
R ifyo ufast enyour seat belt while theve hi‐
cle is in motion #
Before starting the engine: adjust the
driver's seat, the head restra ints, the
st eering wheel or the mir ror and fasten
yo ur seat belt. &
WARNING Risk of becoming trapped if
th e seat height is adjus ted carelessly
If yo u adjust the seat height carelessly, you
or other vehicle occupants could be trapped
and thereby injured. Seats and
stowing 91

#
Before starting the engine: adjust the
driver's seat, the head restra ints, the
st eering wheel or the mir ror and fasten
yo ur seat belt. &
WARNING Risk of entrapment forch il‐
dren when adjusting thesteering wheel
Children could injure themselves if they
adjust thesteering wheel. #
Never lea vechildren unat tended in the
ve hicle. #
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle.
This also applies tomobile phones if the
"Digital Car Key in the smartphone"
function is activated via the Mercedes
connect me web app. #
Tounlo ckthest eering column: push
re lease le ver1 down comple tely. #
Adjust height 2and di stance tosteering
wheel 3. #
Tolock thest eering column: pushrelease
le ve r1 up as far as it will go. #
Check and make sure that thesteering col‐
umn is loc kedby moving thesteering wheel. Ad
justing the steering wheel electrically The
steering wheel can be adjus ted when the
ignition is switched off. 1
Adjusts the dis tance tothesteering wheel
2 Adjusts the height #
Save the settings with the memory function. Seats and
stowing 105

Switching
thest eering wheel heater on/off 1
Toswitch on
2 Toswitch off
3 Indicator lamp Easy entry and
exitfeature How
the easy entry and exitfeature operates &
WARNING Risk of accident when pulling
aw ay during the adjustment process of
th e easy exitfeature
‑ If you pull away while the easy entry and
ex itfeature is making adjustments, you could
lose cont rol of theve hicle. #
Alw ayswa it until the adjustment proc‐
ess is comple tebefore pulling away. &
WARNING Risk of becoming trapped
while adjusting the easy entry andexit
fe ature
When the easy entry andexitfeature adjusts
th esteering wheel, you and other vehicle
occupants – particularly children – could
become trapped. #
During the adjustment process of the
easy entry andexitfeature, make sure th
at no one has any body parts in the
sweep of thesteering wheel. #
Movethe adjustment le ver of thesteer‐
ing wheel if there is a risk of becoming
trapped bythesteering wheel.
The adjustment process is stopped. #
Never lea vechildren unat tended in the
ve hicle. #
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle.
This also applies tomobile phones if the
"Digital Car Key in the smartphone"
function is activated via the Mercedes
connect me web App. The easy ent
ryand exitfeature makes getting in
and out of your vehicle easier.
If th e easy entry andexitfeature is active, the
st eering wheel will mo veupwards in thefo llow‐
ing situations:
R you swit chthe ignition off
R you open the driver's door when the ignition
is switched on 106
Seats and stowing