Page 412 of 506
410 Practical hintsUnlocking/locking in an emergencyUnlocking the vehicle
If you are unable to unlock the vehicle with
the SmartKey, open the driver’s door and
the trunk using the mechanical key.
1Mechanical key locking tab
2Mechanical key
Move locking tab1 in the direction of
the arrow and slide mechanical key2
out of the housing.Unlocking the driver’s door
3Unlocking
4Locking
Unlock the door with the mechanical
key. To do so, push the mechanical key
in the lock until it stops and turn it to
the left.
iUnlocking your vehicle with the me-
chanical key will trigger the anti-theft
alarm system. To cancel the alarm, do
one of the following:
Press button Œ or ‹ on the
SmartKey.
Insert the SmartKey in the starter
switch.
Press the KEYLESS-GO* start/stop
button (
page 35).
Page 413 of 506

411 Practical hints
Unlocking/locking in an emergency
Unlocking the trunk
A minimum height clearance of 5.90 ft
(1.80 m) is required to open the trunk lid.
If you are unable to unlock the trunk with
the SmartKey or KEYLESS-GO*, open the
trunk with the mechanical key.
The handle is located above the rear li-
cense plate recess.
1Unlocking in an emergency
2Handle
Insert the mechanical key into the
trunk lid lock.
Turn the mechanical key counterclock-
wise to position1 and hold it in this
position.
Pull trunk lid handle2 and lift the
trunk lid.
Locking the vehicle
If you are unable to lock the vehicle with
the SmartKey, lock it with the mechanical
key as follows:
Close the passenger doors and the
trunk.
Press the central locking switch in the
cockpit (
page 119).
Check to see whether the locking
knobs on the passenger doors are still
visible. If necessary, push them down
manually.
Slide mechanical key2 out of the
SmartKey.
Lock the driver’s door with the me-
chanical key (
page 411).
Check if the trunk is locked.
!Always make sure there is sufficient
overhead clearance.iUnlocking your vehicle with the me-
chanical key will trigger the anti-theft
alarm system. To cancel the alarm, do
one of the following:
Press buttonŒ or‹ on the
SmartKey.
Insert the SmartKey in the starter
switch.
Vehicles with KEYLESS-GO*:
Grasp the outside door handle.
Press the start/stop button.
Page 414 of 506
412 Practical hintsUnlocking/locking in an emergencyFuel filler flap emergency release
In case the central locking system does
not release the fuel filler flap, you can open
it manually.
1Release knob
Open trunk lid.
Remove right-side tail trim.
Turn release knob1 clockwise (ar-
row).
The fuel filler flap can know be opened.Manually unlocking the transmission
selector lever
In the case of power failure, the transmis-
sion selector lever can be manually un-
locked, e.g. to tow the vehicle.
Depending on production date, your vehi-
cle is equipped with cup holders in either
the center console or in the center arm-
rest.
Cup holder in the center console
1Pin
Open the storage compartment in the
center console (
page 265).
Take out the cup holder (
page 266).
Hold the cover at a 45° angle.
Insert a suitable object1 (e.g. a pin)
through the hole and press the pin
downward.
Remove pin1. iThe selector lever is locked again when
moving it to positionP.
Page 427 of 506

425 Practical hints
Flat tire
Flat tire
In the case of a flat tire, you may tempo-
rarily use the spare wheel when observing
the following restrictions:
Do not exceed a vehicle speed of
50 mph (80 km / h).
Drive to the nearest tire repair facility
to have the flat tire repaired or re-
placed as appropriate.
Do not operate vehicle with more than
one spare wheel mounted.
Preparing the vehicle
Park the vehicle as far as possible from
moving traffic on a hard surface.
Turn on the hazard warning flashers.
Engage the steering wheel lock in the
straight-ahead position and set the
parking brake.
Move the selector lever toP.
Have any passenger exit the vehicle at
a safe distance from the roadway.
Mounting the spare wheel
Preparing the vehicle
Prepare the vehicle as described under
“Preparing the vehicle” on this page.
Take the spare wheel out of the trunk
(page 407).
Take the wheel wrench and the jack
out of the trunk (
page 407).
Lifting the vehicle
Prevent the vehicle from rolling away
by blocking wheels with wheel chocks
(not included) or other sizable objects.
When changing wheel on a level surface:
Place one chock in front of and one be-
hind the wheel that is diagonally oppo-
site to the wheel being changed.
Warning!
G
The dimensions of the Minispare wheel and
the collapsible tire are different from those
of the road wheels. As a result, the vehicle
handling characteristics change when driv-
ing with a spare wheel mounted.
The spare wheel should only be used tempo-
rarily, and replaced with a regular road
wheel as quickly as possible.
Page 433 of 506
431 Practical hints
Flat tire
Lowering the vehicle
Lower vehicle by turning crank coun-
terclockwise until vehicle is resting ful-
ly on its own weight.
Remove the jack.
1-5 Wheel bolts
Tighten the five wheel bolts evenly, fol-
lowing the diagonal sequence illustrat-
ed (1 to 5), until all bolts are tight.
Observe a tightening torque of 96 lb-ft
(130 Nm).
Before storing the jack in the trunk, it
should be fully collapsed.Warning!
G
Have the tightening torque checked after
changing a wheel. The wheels could come
loose if they are not tightened to a torque of
96 lb-ft (130 Nm).
iWrap the damaged wheel in the protec-
tive film that comes with the spare
wheel and put the wheel in the trunk.
You can also place the damaged wheel
down into the spare wheel well. In this
case, you must stow the holder from
the spare wheel well in the trunk.
Do not activate the tire pressure moni-
toring system until the depressurized
tire is no longer in the vehicle.
Page 436 of 506

434 Practical hintsBatteries
Disconnecting the battery
Depress parking brake firmly or move
gear selector lever to positionP.
Turn off all electrical consumers.
Remove SmartKey from starter switch.
Vehicles with KEYLESS-GO*:
Press the start/stop button until
the engine shuts off.
Open the driver’s door.
Open the trunk.
!Never loosen or detach battery termi-
nal clamps while the engine is running
or the SmartKey is in the starter switch.
Otherwise the alternator and other
electronic components could be se-
verely damaged.
Have the battery checked regularly by
an authorized Mercedes-Benz Center.
Refer to Maintenance Booklet for main-
tenance intervals or contact your au-
thorized Mercedes-Benz Center for
further information.Warning!
G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof battery only to avoid the risk
of acid burns in the event of an accident.
Warning!
G
The SBC brake system requires electrical
power to operate.
A malfunction in the vehicle’s power supply
or electrical system may impair brake sys-
tem operation and switch it into its emer-
gency operation mode. The same applies if
battery is disconnected. To brake, the driver
must then apply significantly greater brake
pedal pressure and depress the pedal much
further to obtain the expected braking ef-
fect. If necessary, apply full pressure to the
brake pedal. Brakes may only be applied to
the front wheels. Stopping distance is in-
creased! Adjust your driving style according-
ly. For more information, refer to “SBC brake
system” (
page 90).
Warning!
G
With a disconnected battery
you will no longer be able to turn the
SmartKey in the starter switch and
pressing the KEYLESS-GO* start/stop
button on the gear selector lever will
have no effect
the gear selector lever will remain
locked in positionP
Page 445 of 506

443 Practical hintsFuses
Fuses
Fuse box in passenger compartment
1CoverOpening
Pull cover1 open with a screwdriver
or similar tool.
Remove cover1 rearward.
Closing
Attach cover1 in the front.
Fold cover1 in until it engages.
2Cover
3Catches
Turn catches3 counter-clockwise
and remove cover2.Fuse chart
The fuse chart is found in the fuse box in
the passenger compartment. The amper-
ages of the fuses are also given there.
Spare fuses
Spare fuses are found in the vehicle tool kit
in the trunk.
Fuse extractor
The fuse extractor is found in the vehicle
tool kit in the trunk.
iOnly install fuses that have been tested
and approved by Mercedes-Benz and
that have the specified amperage rat-
ing.
Never attempt to repair or bridge a
blown fuse. Have the cause determined
and remedied by an authorized
Mercedes-Benz Center.
iOnly install fuses that have been tested
and approved by Mercedes-Benz and
that have the specified amperage rat-
ing.
Never attempt to repair or bridge a
blown fuse. Have the cause determined
and remedied by an authorized
Mercedes-Benz Center.
Page 483 of 506

481 Index
Checking
Coolant level 308
Oil level 301, 304
Tire inflation pressure 301
Vehicle lighting 301
Child safety 71
Airbags 62
Infant and child restraint systems 67,
71
LATCH child seat anchors 81
Child safety switch see Blocking of rear
window operation 83
Cigarette lighter 269
Cleaning
Headlamps 186, 350
Light alloy wheels 351
Parktronic* system sensor 351
side markers 350
tail lamps 350
turn signal lenses 350
Windshield 52
Wood trims 354
Cleaning tires 313Clock 160
Closing
Glove box 262
Panorama sliding/pop-up roof 227
Roller sunblinds 226
Side windows 219
Sliding/pop-up roof* 223
Trunk
Vehicle with KEYLESS-GO* 115,
116
Trunk lid 112
Windows 218
Closing the trunk lid 115, 116
Cockpit 22, 471
Cockpit management and data system
(COMAND) 472
Cold tire inflation pressure 337
Collapsible tire 457
Tire inflation pressure 429
COMAND 472
COMAND* see separate operating instruc-
tionsCombination switch 137
Turn signals 51
Windshield wipers 51
Control system 145, 472
AUDIO menu 150
Convenience submenu 167
Display digital speedometer 150
Distronic* menu 152
Functions 149
Instrument cluster submenu 157,
159
Lighting submenu 162
Menus 148, 149
Multifunction display 145
Multifunction steering wheel 146
Selecting radio system 150
Selecting satellite radio* system 151
Settings menu 154
Standard display menu 150
Submenus 147, 149
TEL* menu 171
Trip computer menu 170
Vehicle status message memory
menu 153
Vehicle submenu 166