Page 105 of 491

104 Controls in detailLocking and unlockingFactory settingGlobal unlocking
Press buttonŒ.
All turn signal lamps flash once.
An acoustic signal sounds once (if
equipped and feature activated).
The locking knobs in the doors
move up.
The anti-theft alarm system is dis-
armed.
The vehicle will lock again automatically
and reactivate the anti-theft alarm system
within approximately 40 seconds of un-
locking if:
neither door nor trunk is opened
the SmartKey is not inserted in the
starter switch
the central locking switch is not acti-
vatedGlobal locking
Press button‹.
All turn signal lamps flash three
times.
An acoustic signal sounds three
times if equipped and feature acti-
vated).
The locking knobs in the doors
move down.
The anti-theft alarm system is
armed.
Selective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey so that
pressingŒ only unlocks the driver’s
door and the fuel filler flap.
Press and hold buttonsŒ and‹
simultaneously for about five seconds
until battery check lamp5 flashes
twice.
The SmartKey will then function as fol-
lows:
iDepending on production date, your
vehicle may be equipped with an
acoustic lock and unlock confirmation
signal feature. If your vehicle is
equipped with this feature and the fea-
ture is activated, an acoustic signal will
sound when the vehicle is locked or un-
locked using the SmartKey.
To determine whether or not your vehi-
cle is equipped with this feature, con-
tact an authorized Mercedes-Benz
Center. If equipped and you wish to ac-
tivate or deactivate the feature, or ad-
just its signal volume, also contact an
authorized Mercedes-Benz Center.
Page 114 of 491

113 Controls in detail
Locking and unlocking
Global locking using the lock button at
tailgate
1Lock button at tailgate
Press the lock button1.
All turn signal lamps flash three times.
An acoustic signal sounds once (if
equipped and feature activated).
For more information, see “Factory set-
ting” (
page 110).
The locking knobs in the doors move
down.
The anti-theft alarm system is armed.
!The tailgate swings open upwards auto-
matically. Always make sure there is
sufficient overhead clearance.
Vehicles with tailgate opening/closing
system*: to stop the opening proce-
dure, press buttonŠ on the
SmartKey. The tailgate stops moving.iIf the vehicle was previously centrally
locked, the tailgate will lock automati-
cally when closed (
page 117).
To confirm locking all turn signal lamps
flash three times.
iTo prevent a possible inadvertent lock-
out, the tailgate will open automatically
if a SmartKey with KEYLESS-GO is
recognized in the rear shelf or inside
the vehicle.iIf the vehicle was previously centrally
locked with KEYLESS-GO, the trunk will
lock automatically after closing it.
To confirm locking all turn signal lamps
flash three times.iYou can also lock the vehicle using the
lock button at outside door handle
(page 60) or KEYLESS-GO locking/
closing switch (
page 121).
Page 405 of 491
404 Practical hintsUnlocking / locking in an emergencyUnlocking the vehicle
If you are unable to unlock the vehicle with
the SmartKey, open the driver’s door 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 driver’s door and/or the
trunk with the mechanical key will trig-
ger the anti-theft alarm system. To can-
cel the alarm, insert the SmartKey or
SmartKey with KEYLESS-GO* in the
starter switch.
Page 486 of 491

485 Index
Tires and wheels
Tire inflation pressure 318
Tools 403
Tow-away alarm 99
Arming 99
Disarming 99
Disarming for transport 99
Towing eye bolt (vehicle tool kit)
Installing 433
Towing the vehicle 430
Traction 189, 335
Transmission fluid level 303
Tread 335
Tread depth 309
Tread depth (tires 337
Treadwear indicators 335
Trip computer 178
Trip odometer
Resetting 151
Trunk
Lock button, KEYLESS-GO* 113
Turn signals 51
Additional in mirrors 411
Front bulbs 411
Turning off
Engine 57Twin roller blind 256
U
Uniform Tire Quality Grading
Standards 335
Units
Setting speedometer units 165
Setting temperature units 165
Setting tire inflation pressure
units 167
Unlocking 32, 102, 404
Driver’s door in an emergency 404
Fuel filler flap 296
Global 104
Global with KEYLESS-GO* 110
Selective setting 104, 111
Vehicle in an emergency 276
With KEYLESS-GO* 33
With the SmartKey 32
Upgrade scenario
Tele Aid* 275
Uphill driving
Cruise control 229
Upshifting 185
Useful features 259
Ashtrays 265
Cigarette lighter 266Garage door opener 277
Heated steering wheel* 267
Tele Aid* 269
Telephone* 268
V
Vehicle
Individual settings 162, 164
Locking in an emergency 405
Lowering 422
Towing 430
Unlocking in an emergency 404
Vehicle capacity weight 335
Vehicle care
Cup holder 349
Distronic* system sensor cover 347
Engine cleaning 346
Gear selector lever 349
Hard plastic trim items 349
Leather upholstery 350
Light alloy wheels 348
Ornamental moldings 347
Paintwork 346
Plastic and rubber parts 350
Power washer 345
Seat belts 349
Steering wheel 349