
Problem Possible causes/consequences and
0050
0050Solutions Vehicles with
apetrol
engine:
The engine is not run-
ning smoothly and is
misfiring. There is
amalfunction in the engine electronics or amechanical
componentoft he engine control unit.
X Only depress the accelerator pedal slightly.
X Have the cause rectified immediately at aqualified specialist
workshop.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it. The coolant tempera-
ture gauge shows a
value above 120 †.
The coolant warning
lamp may also light up
and awarning tone may
sound (Y page 107). The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X
Stop as soon as possible and allow the engine and the coolant
to cool down.
X Check the coolant level (Y page 183). Observe the warning
notes as you do so and top up the coolant if necessary. If the coolant level is correct,t
he radiator fan may be faulty. The
coolant is too hot and the engine is no longer being cooled suffi-
ciently.
X If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop/start driving. 242
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Automati
ctransmission* Problem Possible causes/consequences and
0050
0050Solutions The transmission has
problem
sshifting gear. The transmission is losing oil.
X
Hav ethe transmission checke dataqualified specialist work-
sho pimmediately. The acceleration ability
is deteriorating.
The transmission no
longer changes gear. The transmission is in emergenc
ymode.
It is only possible to shif tinto second gear and revers egear.
X Stop th evehicle.
X Mov ethe transmission to position P.
X Turn th ekeyin th eignition to position 0(Y page 65 )orpress
th eS tart/Sto pbutton* repeatedly until all indicator lamp sin
th ei nstrumen tcluste rgoo ut.
X Wait at least 10 seconds before restarting th eengine.
X Mov ethe transmission to position Dor R.
If D is selected, th etransmission shifts into secondgear;ifRis
selected, th etransmission shifts int orevers egear.
X Hav ethe transmission checke dataqualified specialist work-
sho pimmediately. PARKTRONIC*
Problem Possible causes/consequences and
0050 0050Solutions Only th
ered segments
in th ePARKTRONIC
warning display are lit.
You also hear awarning
tone for approximately
two seconds.
PARKTRONI Cisdeacti-
vated after approx-
imately 20 seconds and
th ei ndicator lamp in
th eP ARKTRONI Cbut-
to nl ights up. PARKTRONI
Chas malfunctioned and has switched itself off.
X If problem spersist, hav ePARKTRONI Cchecked ataq ualified
specialist workshop. Only th
ered segments
in th ePARKTRONIC
warning display are lit.
PARKTRONI Cisdeacti-
vated after approx-
imately 20 seconds. The PARKTRONI
Csensor sare dirt yorthere is interference.
X Clean th ePARKTRONI Csensor s(Ypage 202).
X Switc hthe ignition bac kon. Troubleshooting
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Problem Possible causes/consequences and
0050
0050Solutions You can no longer lock
or unlock the vehicle
using KEYLESS GO*.
KEYLESS GO* is in standby mode because the vehicle has not
been unlocked for an extended period.
X
Pull the door handle and then turn the key to position 2in the
ignition lock. KEYLESS-GO* is malfunctioning.
X
Lock/unlock the vehicle using the remote control function of
the key. Point the tip of the key at the driver's door handle from
close range and press the 0036/0037button.
X Have the key checked at aqualified specialist workshop. There is interference from
apowerful source of radio waves.
X Lock/unlock the vehicle as described in the "Opening and clos-
ing in an emergency" section (Y page 249).You have lost
akey. X
Have the key cancelled at aMercedes-Benz Service Centre.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. You have lost the emer-
gency key element.
X
Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. The key cannot be
turned in the ignition
lock. The key has been in position
0for aconsiderable time.
X Remove the key and reinsert it into the ignition lock.
X Check the starter battery and charge it if necessary
(Y page 273).
X Start the engine. The on-board voltage is too low.
X
Switch off non-essential consumers, e.g. seat heating* or inte-
rior lighting, and try to turn the key again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 273).
or
X Jump-start the vehicle (Y page 276).
or
X Consult aqualified specialist workshop. 248
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X
Insert the emergency key element into the
lock of the driver's door as far as it willg o.
X Turn the emergency key element anti-
clockwise to position 004A.
The door is unlocked.
i On right-hand-drive vehicles, turn the
emergency key element clockwise.
X Turn the emergency key element back and
remove it. Locking the vehicle
X Open the driver's door.
X Close the front-passenger door and the
boot lid.
X Press the locking button (Y page 64).
X Check whether the locking knob on the
front-passenger door is still visible. Press
down the locking knob manually,ifn eces-
sary.
X Close the driver's door.
X Remove the emergency key element from
the key (Y page 249). X
Insert the emergency key element into the
lock of the driver's door as far as it willg o.
X Turn the emergency key element clockwise
as far as it willgotop osition004A.
i On right-hand-drive vehicles, turn the
emergency key element anti-clockwise.
X Turn the emergency key element back and
remove it.
X Check whether the doors and the boot lid
are locked. Closing the soft top manually (Cabrio-
let)
If the soft top cannot be closed automatically,
check the following points:
R Is the boot separator engaged
(Y page 160)?
R Is the skibag cover* closed (Y page 160)?
R Are the head restraints on the rear bench
seats extended?
R Is the boot lid closed?
R Is the on-board voltage sufficient?
Start the engine if necessary.
If automatic operation still does not work, the
soft top can be closed manually.
This work must be performed by two persons.
i Closing the soft top manually is acom-
plex, technically demanding process which
requires agreat deal of force. Close the soft
top manually only in extreme emergencies. 250
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G
Risk of injury
There is ariskofa cidb urns whe njump-start-
ing avehicle du etothe gases which escape
from the battery .Donot lean over the battery
while the engine is being jump-started. G
Risk of explosion
Gases escaping from the battery during jump-
starting may cause mino rexplosions. Avoid
creating sparks. Kee pnaked flames away
from the battery ,and do not smoke.
Compl ywiths afety precautions and take pro-
tective measures whe nhandling batteries. You will find these under "Battery
"inthe
index.
X Make sure that the two vehicle sdonot
touch.
X Appl ythe parking brake firmly.
X Manual transmission: engage neutral.
X Automatic transmission*: shift the trans-
missio ntoposition P.
X Switch off al lelectrical consumers (e.g.
radio, blower, etc.).
X Ope nthe bonne t(Ypage 180). X
Slide cover 0046of positive terminal 0047in
the direction of the arrow .
X Connect positive terminal 0047on your vehi-
cle to positive terminal 008Aof dono rbattery
0087 using the jump lead ,beginning with your
ow nb attery.
X Start the engine of the dono rvehicle and
run it at idling speed.
X Connect negative terminal 0088of dono rbat-
tery 0087to earth point 0086of your vehicle
using the jump lead ,connecting the jump
lead to dono rbattery 0087first.
X Start the engine. X
First, remove the jump lead from earth
point 0086and negative terminal 0088,then
from positive terminal 0047and positive ter-
minal 008A,eacht ime disconnecting from the
battery on your ow nvehicle first.
X Have the battery checke dataqualified
specialist workshop, e.g. aMercedes-Benz
Service Centre. Jump-starting
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compartment under the luggage compart-
ment floor. Before changing
afuse
X Park the vehicle.
X Switch off al lelectrical consumers.
X Remove the key from the ignition lock. Fus
eboxunde rthe dashboard X
To open: openthe driver' sdoor.
X Pull ou tcover 0046slightl yatthe bottom
008A.
X Pull cover 0046outwards and remove it 0047.
X To close: clipinc over0046at the front.
X Fol dc over 0046inward suntilite ngages.
X Close the driver' sdoor. Fus
eboxin the engine compartment
X Make sure that the windscreen wiper sare
turne doff. G
Risk of injury
Make sure that the windscreen wiper sare
turne doff and the key is pulled ou tofthe igni-
tion lock before yo uopenthe cove rofthe fuse
box. Otherwise, the windscreen wiper sand
the wiper rod sabove the cove rcould be set
in motion. Thi scould lead to yo uorothers
being injured by the wiper rods. X
To open: openthe bonne t(Ypage 180). X
Remove moistur efrom the fus ebox using
ad ry cloth.
X Uncli plines 0047 from the lid.
X Move asid elines 0047.R oute the lines behind
connection 008Ato do this.
X Ope nclamps 0046and unhook the corre-
sponding wire straps at the bottom.
X Lift off the fus ebox cove rtowards the front
of the vehicle.
X To close: check whethe rthe rubber sea lis
positioned correctly in the lid.
X Inser tthe li dinto the bracket at the rea rof
the fus ebox.
X Press the li ddowna nd secure with
clamps 0046.
X Clip lines 0047onto the lid.
X Close the bonne t(Ypage 180). Fus
eboxin the boot
X To open: openthe boot. Fuses
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