
Re
quirements:
R A CR 2032 3 V cell battery
Mercedes-Benz recommends that you ha vethe
battery replaced byaqu alified specialist work‐
shop. #
Remo vethe emer gency key ( / page 42). Example image #
Press release button 2down fully and slide
co ver1 forw ard. #
Remo vebattery compartment 3and remo ve
th e dischar ged batter y. #
Insert the new battery into battery compart‐
ment 3. Obser vethe positive pole marking
in the battery compartment and on the bat‐
te ry. #
Insert battery compartment 3. #
Replace co ver1 sothat it engages. #
Slide the emer gency key in co mplete ly until it
engages (/ page 42). Problems with
thekey Problem
Possible causes/consequences and 0050 0050Solutions
Yo u cannot lock or unlo ck
th eve hicle any more. Po
ssible causes:
R theke y bat tery iswe ak or dischar ged
R there is inter fere nce from a po werful source of radio wav es
R theke y is defective #
Check the battery using the battery check lamp and replace if neces‐
sary (/ page 42). #
Use the emer gency keyto unlo ckand lock theve hicle (/ page 42). #
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 loc ksreplaced. Opening and closing
43

Doors
Un
locking and opening the door from inside #
Tounlo ckand open the front door: pull
door handle 2.
Locking pin 1pops up when the door is
unloc ked. #
Open the door. The
0036 symbol indicates that there ar door is
unlo cked. #
Tounlo ckand open there ar door: pull
opening le ver1 and open there ar door.
When the door unloc ks, latch 2moves
fo rw ard.
The 0036 symbol is visible. #
Toclose: pullthere ar passenger compart‐
ment door closed bythe door handle. #
Tolock: slide latch 2down.
The 0037 symbol is visible. Locking
the door centrally from inside &
WARNING Risk of accident and injury
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 operate ve hicle equipment and become
trapped, forex ample.
In addition, children could also set theve hicle
in motion, forex ample, by:
R releasing the parking brake.
R shifting the automatic transmission out of
park position 005D.
R starting the engine #
Never lea vechildren and animals unat‐
te nded in theve hicle. #
When leaving theve hicle, alw aysta ke
th e SmartK eywith you and lock the
ve hicle. #
Keep the SmartK eyout of there ach of
ch ildren. &
WARNING Risk offata l injury due to
ex posure toextreme heat or cold in the
ve hicle
If people – particular lych ildren – are exposed
to extreme temp eratures over an extended
pe riod of time, there is a risk of serious or
eve nfa ta l injur y. #
Never lea veanyone – pa rticularly chil‐
dren – unat tended in theve hicle. #
Never lea veanimals in theve hicle unat‐
te nded. Lo
cking and unlocking manually
Yo u can use the cent ral locking buttons tocen‐
trally lock and unlock the entire vehicle from the
inside.
The central locking buttons are located in the
driver's and co-driver doors. 44
Opening and closing

Example: central lo
cking buttons in the driver's
door #
Tolock/unlock the entire vehicle: press
button 1(unlock) or 2(lock) when the
doors are closed. Switching
the automatic locking feature on or
off When
the ignition is switched on and theve hicle
is driving at a speed abo ve9mp h (15 km/h), the
ve hicle loc ksautomaticall y. Example: central lo
cking buttons in the driver's
door
There is a danger of being loc ked out when the
function is activated in thefo llowing situations:
R when tow- starting or pushing theve hicle
R onthero ller dynamom eter #
When the doors are closed, switch on the
po we r supp lyor ignition. #
Toswitch on: press and hold button 2for
appr oximately five seconds.
An acoustic signal sounds. #
Toswitch off: press and hold button 1for
appr oximately five seconds.
An acoustic signal sounds. Un
locking/locking the driver's door with the
emer gency key %
If
yo uwa nttolock theve hicle comple tely
wi th th e emer gency key,press the button for
th e locking mechanism from inside firs t wi th
th e driver's door open. Then lock the driver's
door with the emer gency key. #
Tounlo ck:turn the emer gency key counter-
clo ckwise toposition 0047. #
Tolock: turnthe emer gency key clo ckwise to
position 0047.
% Right-hand drive
vehicles: turnthe emer‐
ge ncy key in the opposite direction in each
case. Sliding door
Opening/closing
the sliding door from out‐
side &
WARNING Risk of entrapment byopen
sliding door which is not engaged
If th e open sliding door is not engaged, it
could mo veon its own if theve hicle is on a
slope.
This could trap you or other persons. Opening and closing
45

#
Always make sure that the open sliding
door is engaged. Open the sliding door
as far as it will go. %
Yo
ur vehicle may be equipped with a long
sliding door with an intermediate de tent. Yo u
can also lock the sliding door in place around
halfw aywhen opening and closing. If you do
th is, the door does not ha vetobe opened
fully when getting into or out of theve hicle.
The sliding door is not fully engaged when in
th e intermediate de tent. #
Toopen: pull door handle 1.
The sliding door opens. #
Push back the sliding door using door handle
1 until it engages. #
Check the sliding door de tent. #
Toclose: pullthe sliding door byhandle 1
and firm lyslide it forw ards until it closes. Opening/closing
the sliding door from inside &
WARNING Risk of entrapment byopen
sliding door which is not engaged
When you open the sliding door, the sliding
door could hit other people as it mo ves back‐
wa rds. #
Only open the sliding door when tra ffic
conditions permit. %
Yo
ur vehicle may be equipped with a long
sliding door with an intermediate de tent. Yo u
can also lock the sliding door in place around
halfw aywhen opening and closing. If you do
th is, the door does not ha vetobe opened
fully when getting into or out of theve hicle.
The sliding door is not fully engaged when in
th e intermediate de tent. #
Tounlo ck:pull lo cking pin 3upwards man‐
ually or use the cent ral locking button to
unlo ckthe sliding door (/ page44). #
Toopen: press button 1. #
Slide the sliding door byhandle 2back to
th estop. #
Check the sliding door de tent. The sliding
door must be engaged. #
Toclose: press button 1. #
Slide the sliding door firm lyforw ards byhan‐
dle 2until it closes. #
Tolock: push locking pin 3down wards
manually or use the cent ral locking button to
lock the sliding door (/ page44). Note
s on electrical closing assist If
yo ur vehicle is equipped with electrical closing
assist, you will requ ire less forc eto close the slid‐
ing door. Electrical sliding door
Fu
nction of the electric sliding door Yo
ur vehicle can be equipped with an electric
sliding door on the left and/or right-hand side. 46
Opening and closing

When
the sliding door is loc ked, it can only be
opened from the inside bymanually unlocking
locking pin 4. #
Tounlo ck:pull lo cking pin 4upwards man‐
ually or use the cent ral locking button to
unlo ckthe sliding door (/ page44). #
Toopen: briefly press button 1,2or but‐
to n3.
The sliding door opens au tomatical ly.
When you open the door using button 1or
2, you will additionally hear two warning sig‐
nals.
The indicator lamp at theto p of button 1or
2 will flash and button 3will flash.
When the sliding door is comple tely open, the
indicator lamp at theto p of button 1or2
will light up. #
Toclose: briefly press button 1,2or but‐
to n3.
The sliding door closes au tomatical ly.
When you close the door using button 1or
2, you will additionally hear two warning sig‐
nals.
The indicator lamp at theto p of button 1or
2 will flash and button 3will flash.
When the sliding door is comple tely closed,
th e indicator lamp at theto p of button 1or
2 will go out. #
Tosto p automatic ope ration: briefly press
but ton1 or2.
The sliding door stops moving. #
Tolock: push locking pin 3down wards
manually or use the cent ral locking button to
lock the sliding door (/ page44). %
When
youstop automatic operation upon
opening the door, the door closes when you
press the button again.
% In unf
avorable operating conditions, e.g.
frost, ice or heavy soiling, you can press and
hold the cor responding button. The electric
sliding door mo ves with increased forc e.
Obser vethat, in such circum stances, the
obs tacle de tection is less sensitive. Tostop
th e mo vement, release the button. Opening/closing
the electric sliding door
with thekey #
Tounlo ck:brie fly press the0042 or0041
button on thekey. #
Toopen: press and hold the0042 or0041
button on theke yfo r longer than 0.5 sec‐
onds.
Yo u will hear two acoustic signals and the
sliding door will open automaticall y. #
Toclose: press and hold the0042 or0041
button on theke yfo r longer than 0.5 sec‐
onds.
Yo u will hear two acoustic signals and the
sliding door will close automaticall y. #
Tointer rupt automatic operation: briefly
press the0042 or0041 button on theke y.
The sliding door stops moving.
% When
youstop automatic operation upon
opening the door, the door closes when you
press the button again. Opening/closing
the electric sliding door
with the door handle 48
Opening and closing

#
Tounlo ck:pull lo cking pin 2upwards man‐
ually or use the cent ral locking button to
unlo ckthe sliding door (/ page44). #
Press button 1or pull outside handle 3.
The sliding door opens or closes. #
Press button 1again or pull outside handle
3.
The sliding door stops moving. Un
locking the electric sliding door manually If
th ere has been a malfunction or if the battery
has been disconnected, you can use release
cat ch2 todisconnect the sliding door from the
electric mo tor.Then, you can open or close the
door manually. #
Vehicles with comple tesliding door trim:
re mo vethe co ver from release cat ch2.
Service ope ration is accessible. #
Todisconnect the sliding door from the
electric mo tor:turn release cat ch2 180°
clockwise.
The "MAN" position is set. #
Tounlo ck:pull lo cking pin 3upwards man‐
ually or use the cent ral locking button to
unlo ckthe sliding door (/ page44). #
Press button 1. #
Open or close the sliding door with the out‐
side/inside door handle. #
Toconnect the sliding door tothe electric
mo tor:turn release cat ch2 180° counter-
clockwise.
The "AUTO" position is set. #
Adjust the sliding door (/ page 49).
If it is not possible to rectify the malfunction: #
Visit a qualified specialist workshop. Re
setting the electric sliding door Sliding door buttons on
the center console Sliding door button on
the door sill (B-pillar)
Yo u must reset the sliding door if there has been
a malfunction or a voltage supply inter ruption. Opening and closing
49

Opening/closing
there ar-end doors from the
inside The
0036 symbol indicates that there ar-end door
is unlo cked. #
Tounlo ck:slide latch 2tothe left.
The 0036 symbol is visible. #
Toopen: pull opening le ver1 up and open
th ere ar-end door. #
Swing there ar-end door tothe side until it
engages. #
Toclose: make sure that the left rear-end
door is closed. #
Pull theright rear-end door firm ly closed by
th e door handle. #
Tolock: slide latch 2totheright
The 0037 symbol is visible. Pa
rtition sliding door Opening and closing
the pa rtition sliding door
from the driver's compa rtment &
WARNING Risk of becoming trapped due
to non-engaged pa rtition sliding door
If th e open partition sliding door is not
engaged, it can mo veon its own while the
ve hicle is in motion.
This can cause you or other people to
become trapped. #
Before driving, alw ays close the parti‐
tion sliding door and ensure that it is
engaged. #
Toopen: turntheke y counter-clockwise 3.
The sliding door is unloc ked. #
Slide the sliding door totheright 2asfar as
it will go. #
Toclose: slidethe sliding door tothe left 1
until it engages.
Yo u can lock the sliding door with thekey. Opening and closing
the pa rtition sliding door
from the cargo compa rtment #
Toopen: pushthe le verto theright 3.
The sliding door is unloc ked. #
Slide the sliding door tothe left 1asfar as
it will go. #
Toclose: slidethe sliding door totheright
2 until it engages. Opening and closing
51

Electrical
step Fu
nction of the electrical step Yo
ur vehicle's sliding door may be equipped with
an electrical step.
Elect rical step 1 automatically extends when
th e sliding door opens, and retracts af terth e slid‐
ing door closes. Elect rical step 1 is equipped
with obs tacle de tection at the front. If thestep
meets an obs tacle while extending, it stops.
When you ha veremo vedth e obs tacle, you must
fi rs t close the sliding door then re-open it so that
th estep extends compl etely.
If th e electrical step pr events loading, you can
block it via obs tacle de tection when the sliding
door opens. The electrical step then remains
re tracted and a fork -lift truck or other lifting vehi‐
cle can mo vecloser tothe load area.
% The display sho ws theStep Not Extended
See Operator's Manual message orthestep
not extended malfunction message.
When the ignition is switched off, a warning
to ne sounds if obs tacle de tection is blo cked.
The tone la sts two minutes.
When the ignition is switched on, thewa rning
to ne sounds continuous ly.
Ve hicles with an Instrument Display (color
display): ifth e display sho ws theStep Not
Retracted See Operator's Manual message or
Step Not Extended See Operator's Manual mes‐
sage and a warning tone sounds, electrical step
1 is malfunctioning (/ page 296).
If electrical step 1 is malfunctioning, thestep
may not extend or retract, or only pa rtiall y.After
a malfunction occurs, you must retract and lo ck
electrical step 1 manually in order tocontinue
driving (/ page 52). Before passengers exitthe ve
hicle, inform them that electrical step 1 may
be missing. Re
leasing the electrical step in an emer gency
(manual retraction) If
th e electrical step does not automatically
re tract, you must manually retract thestep and
lock it in order tocontinue driving. #
Onthe underside of step 2 on bo thbars 1
re mo vethe spring cotters 3from the pin. #
Remo vethewa shers 4and de tach both
bars. 52
Opening and closing