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Key
Overview of
key functions &
WARNING Risk of accident and inju ry
due tochildren left unat tended in the
ve hicle
If ch ildren are left unat tended in theve hicle,
th ey could:
R open doo rs,th ereby endangering other
persons or road users.
R get out of theve hicle and be hit by
oncoming traf fic.
R ope rate ve hicle equipment and become
trapped, forex ample.
In addition, children could also set theve hi‐
cle in motion, forex ample, by:
R releasing the parking brake.
R shifting the automatic transmission out of
park position jor shifting manual trans‐
mission into neutral.
R starting the engine. #
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle. #
Never lea vechildren and animals unat‐
te nded in theve hicle. #
Keep theve hicle key out of reach of
ch ildren. *
NO
TEDama getotheke y caused by
magnetic fields #
Keep theke yaw ay from strong mag‐
netic fields. 1
Battery check lamp
2 Locks
3 Opens theta ilgate
4 Unloc ks
% The key may vary from the one shown in the
diagram, depending on theve hicle equip‐
ment.
The key loc ksand unlo cksth efo llowing compo‐
nents:
R the doors
R theta ilgate
R the fuel filler flap 54
Opening and closing
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If
th eve hicle is not opened within appr oximately
40 seconds af ter unlocking, it loc ksagain. Anti-
th eft pr otection is primed again.
Do not keep theke yto ge ther with electronic
devices or me tal objects. This can af fect the
ke y's functionalit y.
% If battery check lamp 1does not light up
af te r pressing the% or& button, the
battery is dischar ged.
Re placing theke y bat tery ( / page 56). Ac
tivating/deactivating the acoustic lo cking
ve rification signal Multimedia sy
stem:
4 Vehicle 5
î Vehicle settings
5 Acoustic lock #
Activate Oor deacti vate ª the function. Ac
tivating/deactivating the panic alarm Re
quirements:
R The ignition is switched off %
The panic alarm function is only available in
cer tain countries. #
Toactivate: press button 1for appro x‐
ima tely one second.
A visual 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 cent ral unlocking R
unlocking the driver's door and fuel filler flap #
Toswitch between settings: pressthe
Ü andß 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 theÜ 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. Deactivating
theke y functions If
yo u do not use theve hicle or a keyfo r an
ex tended pe riod of time, you can reduce the
energy consum ption of there spective key.Todo
so, deactivate theke y functions. Opening and closing
55
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#
Todeactivate: pressthe& button on the
ke y twice in quick succession.
The battery check lamp of theke yflashes
twice brief lyand lights up once. #
Toactivate: press any button on thekey.
% When theve hicle is star ted with theke y in
th estow age compartment of the cent recon‐
sole, theke y functions are automatical ly
activated (/ page108). Re
moving/inserting the eme rgency key #
Toremo ve:push release cat ch1 inthe
direction of the ar row and simul taneously pull eme
rgency key2 comp lete ly out of the
key. #
Toinser t:push emer gency key2 fully in to
th eke y until it en gage s.
Re lease cat ch1 must then be back in the
basic position. Re
placing the key battery &
DANG ER Serious damage tohealth
caused byswallowing batteries
Batteries contain toxic and cor rosive sub‐
st ances. Swallowing bat teries may cause
serious damage tohealth.
There is a risk of fata l injur y. #
Keep batteries out of there ach of chil‐
dren. #
If batteries are swallo wed, seek medical
attention immediately. +
ENVIRONMEN
TALNO TEEnvironmental
dama gedue toimproper disposal of bat‐
te ries Batteries conta
in pollutants. It is
illegal todispose of them with the household
ru bbish. #
Dispose of batteries in an
environmen tally responsible manner.
Ta ke dischar ged batteries toaqu alified
specialist workshop or toa collection
point for used batteries. Re
quirements:
R Yourequ ire a CR2025 3 V cell batter y.
Mercedes-Benz recommends that you ha vethe
battery replaced at a qualified specialist work‐
shop. 56
Opening and closing
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#
Remo vethe emer gency key ( / page 56). #
Press eme rgency key2 into the opening in
th eke y in the direction of the ar row until bat‐
te ry compa rtment co ver1 opens. When
doing so, do not hold battery compartment
co ver1 shut. #
Remo vebattery compartment co ver1. #
Repeatedly taptheke y again styour palm
until bat tery 3 falls out of thekey. #
Insert the new battery with the positive pole
fa cing up wards. Use a lint-free clo thtodo so. #
Make sure that the sur face of the battery is
free of lint, grease and other impurities. #
Insert the front tabs of battery compartment
co ver1 into the housing and then press to
close it. #
Insert emergency key2 into thekey. Problems with
thekey Problem
Possible causes/consequences and M MSolutions
Yo u can no lon ger lock or unlock the
ve hicle. Po
ssible causes:
R The key bat tery iswe ak or dischar ged.
R There is inter fere nce from a po werful radio signal source.
R The key is faulty. #
Check the battery using the battery check lamp and replace if necessary (/ page 56). #
Use the emer gency keyto lock or unlock (/ page 56). Opening and closing
57
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Problem
Possible causes/consequences and M
MSolutions #
Have theke ych ecked at a qualified specialist workshop.
Yo u ha velost a key. #
Have theke y deacti vated at a qualified specialist workshop. #
If necessar y,ha ve the mechanical lock changed as well. Doors
Note
s onthe additional door lock The additional door lock is only
available for
ve hicles forth eUni ted Kingdom. &
WARNING Risk of inju ryto persons
inside theve hicle when the additional
door lock is activated
If th e additional door lock is activated, the
doors can no longer be opened from the
inside.
If th ere are persons in theve hicle, they can
no longer le aveth eve hicle, e.g. in hazardous
situations. #
Never lea vepersons unattended in the
ve hicle, particularly children, elderly
persons or persons in need of help. #
Ifth ere are persons in theve hicle, do
not activate the additional door loc k. The additional door lock is automatically activa‐
te d in thefo llowing situations:
R The vehicle is loc ked using thekey.
R The vehicle is loc ked using KEYLESS-GO.
If th eve hicle has been loc ked via Mercedes me
connect, the additional door lock is not activa‐
te d.
If th e additional door lock is activated, the doors
cann otbe opened from the inside. %
After locking you can issue a signal with the
horn.
Yo u can pr eventthe additional door lock from
being activated bydeactivating interior pr otec‐
tion before locking theve hicle
(/ page 73). Un
locking/opening the doors from the inside #
United Kingdom onl y:obser vethe no tes on
th e additional door lock (/ page 58).58
Opening and closing
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#
Pull door handle 2.
Locking pin 1pops up when the door is
unloc ked. Centrally locking and unlocking
theve hicle
from the inside #
Tounlo ck:press button 1.
This does not lo ckor unlock the fuel filler flap.
The vehicle is not unloc ked:
R Ifyo u ha veloc kedth eve hicle using thekey. R
Ifyo u ha veloc kedth eve hicle using KEY‐
LESS-GO. Locking/unlocking
theve hicle with KEY‐
LESS-GO Re
quirements:
R The key is outside theve hicle.
R The dis tance between theke y and theve hicle
does not exceed 1 m.
R The driver's door and the door at which the
door handle is used are closed. Opening and closing
59
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#
Tounlo cktheve hicle: touch the inner sur‐
fa ce of the door handle. #
Tolock theve hicle: touch sensor sur face
1 or2. #
Convenience closing: touch recessed sen‐
sor su rface 2until the closing process has
been comple ted.
% Further information on con venience closing
(/ page 68).
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 The key functions ha vebeen deactivated (/ page 55).
R The key bat tery iswe ak or dischar ged.
R There is inter fere nce from a po werful radio signal source. 60
Opening and closing
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Problem
Possible causes/consequences and M
MSolutions
R The key is faulty. #
Activate theke y functions (/ page 55). #
Check the battery using the battery check lamp and replace if necessary (/ page 56). #
Use the emer gency keyto unlo ckor lock theve hicle (/ page 56). #
Have theve hicle and keych ecked at a qualified specialist workshop. Ac
tivating/deactivating the automatic lo ck‐
ing feature The
vehicle is loc ked automatically when the
ignition is switched on and the wheels are turn‐
ing fast erthan walking pace. #
Toactivate: press and hold button 2for
appr oximately five seconds until an acoustic
signal sounds. #
Todeactivate: press and hold button 1for
appr oximately five seconds until an acoustic
signal sounds.
In thefo llowing situations, there is a danger of
being loc ked out when the function is activated:
R While theve hicle is being tow star ted/
pushed.
R The vehicle is being tested on the dynamom‐
et er. Opening and closing
61