Page 24 of 506
23 At a glance
Cockpit
Item
Page
1
Steering wheel gearshift
buttons
(CLK 500, CLK 55 AMG)
171
2
Combination switch
Turn signals
Windshield wipers
High beam
51
52
51
3
Cruise control lever
255
4
Multifunction steering
wheel
26,
134
5
Instrument cluster
24,
130
6
Starter switch
34
7
Front Parktronic* warning
indicators
262
8
Overhead control panel
29
Item
Page
9
Glove box
269
a
Cup holder
271
b
Center console
27, 28
c
Hood lock release
305
d
Horn
e
Steering wheel adjustment
stalk
40
f
Parking brake pedal
49
g
Door control panel
30
h
Parking brake release
49
j
Exterior lamp switch
50,
122
k
Exterior rear view mirror
adjustment
41
l
Headlamp washer switch*
176
Page 95 of 506

94 Controls in detailIn the “Controls in detail” section you will
find detailed information on how to oper-
ate the equipment installed on your vehi-
cle. If you are already familiar with the
basic functions of your vehicle, this section
will be of particular interest to you.
To quickly familiarize yourself with the ba-
sic functions of the vehicle, refer to the
“Getting started” section of this manual.
The corresponding page numbers are giv-
en at the beginning of each segment.Locking and unlocking
For more information on locking and
unlocking, see “Getting started”
(page 32) and (
page 55).
SmartKey
Your vehicle comes supplied with two
SmartKeys, each with remote control and
a removable mechanical key.
The locking tabs for the mechanical key
portion of the two SmartKeys are a
different color to help distinguish each
SmartKey unit.
The SmartKey provides an extended oper-
ating range. To prevent theft, however, it is
advisable to only unlock the vehicle when
you are in close proximity to it.
The SmartKey centrally locks and unlocks:
the doors
the glove box
the trunk lid
the fuel filler flap
SmartKey with remote control1‹ Lock button
2Š Opening button for trunk lid
3Mechanical key locking tab
4Œ Unlock button
5Battery check lamp
6Â Panic button (
page 83)
Page 99 of 506

98 Controls in detailLocking and unlockingUnlocking and opening the trunk lid
You can unlock and open the trunk lid
separately.
A minimum height clearance of 5.41 ft
(1.65 m) is required to open the trunk lid.
Press and hold button Š until the
trunk lid unlocks and begins to open.
The trunk lid can also be opened from its
inside in an emergency, see “Trunk lid
emergency release” (
page 109).Loss of SmartKey or mechanical key
If you lose a SmartKey or mechanical key,
you should do the following:
Have the SmartKey deactivated by an
authorized Mercedes-Benz Center.
Report the loss of the SmartKey or the
mechanical key immediately to your
car insurance company.
If necessary, have the mechanical lock
replaced.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
SmartKey with KEYLESS-GO*
Vehicles equipped with KEYLESS-GO come
with two SmartKeys with KEYLESS-GO,
each with remote control and a removable
mechanical key. The locking tabs for the
mechanical key portion of the two
SmartKeys are a different color to help
distinguish each SmartKey unit.
The KEYLESS-GO function is integrated
into the SmartKey. On these vehicles, the
validity of the SmartKey with KEYLESS-GO
is checked every time you pull a door
handle.
If the SmartKey with KEYLESS-GO is valid,
your vehicle unlocks
the doors
the glove box
the trunk lid
the fuel filler flap
!The trunk lid swings open upwards au-
tomatically. Always make sure there is
sufficient overhead clearance.iIf the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 107). The
turn signals will flash three times to
confirm locking.
Page 221 of 506

220 Controls in detailAudio systemEjecting a CD
Make sure the system is switched on.
Press EJECTbutton.
The system ejects the CD.
NO CD
will
appear in the display.
Remove CD from slot.Operational readiness of CD changer*
If a CD changer has been installed in the
vehicle, it can be operated from the front
control panel of the audio system. A load-
ed magazine must be installed to play CDs.
The CD changer is located in the glove box.
Loading/unloading the CD magazine
Slide changer door to the right and
press gbutton.
Magazine will be ejected.1CD
2CD changer
3CD tray
4CD magazine
Remove magazine4 and pull
CD tray3 fully out.
Place CD1 in recess of tray, label side
up.
iIf a CD has been inserted incorrectly or
cannot be read,
WRONG CD0
will appear
in the display.
iIf you do not take the CD out of the CD
slot within approx. 15 seconds, the sys-
tem automatically pulls the CD back in
and plays it.
If a CD is pulled back in, press
EJECTbutton for five seconds; the CD
will then be ejected.
iThe CD changer* may not be able to
play audio CDs with copy protection.
Page 270 of 506

269 Controls in detail
Useful features
Useful features
Storage compartments
Glove box
1Glove box
2Glove box lid releaseOpening the glove box
Pull lid release2.
The glove box lid opens downward.
Closing the glove box
Push lid up to close.
Warning!
G
To help avoid personal injury during a colli-
sion or sudden maneuver, exercise care
when stowing objects in the vehicle. Put lug-
gage or cargo in the trunk if possible. Do not
pile luggage or cargo higher than the seat
backs.
Luggage nets cannot secure hard or heavy
objects.
Keep compartment lids closed. This will help
to prevent stored objects from being thrown
about and injuring vehicle occupants during
an accident.
!Make sure no objects fall into the open-
ings of the subwoofer between the rear
seats.
If necessary, contact an authorized
Mercedes-Benz Center to remove any
objects which may have fallen into the
openings.
iThe glove box lid contains a compart-
ment for eyeglasses.
Close the compartment for glasses first
before closing the glove box.
Audio system/COMAND* with CD
changer*: The CD changer* is located
in the glove box.
Page 473 of 506

472 IndexClosing
Cup holder 272
Glove box 269
Hood 306
Side windows 240
Side windows
with KEYLESS-GO* 243
Ski sack roller blind* 246, 267
Soft top 244
Soft top (SmartKey) 252
Soft top (switch) 248
Soft top in an emergency 403
Trunk 107
Windows 239
Windows with KEYLESS-GO* 243
Windows with SmartKey 242
Windows with soft top switch 241
Cockpit 22, 461
Cockpit management
and data system (COMAND*) 461
Cold tire inflation pressure 336
Collapsible wheel chock 394
COMAND* 461
COMAND* see
separate operating instructionsCombination switch 126
High beam flasher 126
Turn signals 51
Windshield wipers 52
Comfort driving
Transmission program mode 169
Control and operation
of radio transmitters 299Control system 133, 461
AUDIO menu 139
Convenience submenu 156
Display digital speedometer 139
Functions 134, 137
Instrument
cluster submenu 145, 147
Lighting submenu 151
Menus 136, 137, 463
Multifunction display 133
Multifunction steering wheel 134
NAV menu 141
Selecting radio system 139
Selecting satellite radio* system 140
Settings menu 142
Standard display menu 138
Submenus 135, 137
TEL* menu 160
Trip computer menu 158
Vehicle status
message memory menu 141
Vehicle submenu 155
Page 478 of 506
477 Index
Fuses 436
Aids for changing fuses 436
Auxiliary fuse box in trunk 438
Fuse box in engine compartment 437
Fuse box
in passenger compartment 437
Fuse chart 436
Fuse extractor 436
Spare fuses 436G
Garage door opener 29, 284
Gasoline see Fuel
Gasoline additives 457
GAWR 336
Gear range 462
Automatic transmission 166
Limiting 166
Shifting into optimal 165
Gear range limit
Canceling 165
Gear selector lever 25, 163, 400
Cleaning 351
Position 25
Position
(Automatic transmission) 163, 167
Unlocking manually 400
Global
Locking 96
Locking with KEYLESS-GO* 102
Unlocking 96
Unlocking with KEYLESS-GO* 101Global Positioning System (GPS) 462
Glove box 23, 269
Closing 269
Opening 269
Good visibility 176
GPS 462
Gross Axle Weight Rating see GAWR
Gross Vehicle Weight Rating see GVWR
Gross Vehicle Weight see GVW
GVW 336
GVWR 336
Page 484 of 506

483 Index
Roll bar 387
Selector lever 373
SmartKey with KEYLESS-GO* 382
Soft top 389
Steering gear oil level 389
Symbol messages 374–390
Tele Aid 388
Telephone* 390
Text messages 365–373
Trunk 390
Washer fluid 390
Multifunction
steering wheel 26, 134, 464
Buttons 134
N
Navigation system
Operating 141
See separate COMAND*
operating instructions
Night security illumination 124
Normal occupant weight 337
Nubuck leather upholstery (CLK 55 AMG)
Cleaning 352O
Occupant Classification System see OCS
Occupant distribution 337
Occupant safety 60
Air bags 61
Children and air bags 62
Children in the vehicle 72
Fastening the seat belts 43
Front passenger front
air bag off indicator lamp 79, 361
Infant and child restraint systems 72
LATCH child seat anchors 80
OCS 75
Seat belts 43, 64
OCS 75, 464
Self-test 80
Odometer, main 25
Oil
Adding 309
Checking level 307
Consumption 306
Filler cap 309
Filler neck 309
Viscosity 462
Oil level
Checking 304One-touch gearshifting 165
Canceling gear range limit 165
Downshifting 165
Upshifting 165
Opening
Ashtray (Center console) 273
Ashtray (Rear seat) 274
Cup holder 272
Doors from the inside 105
Fuel filler flap 302
Fuel filler flap manually 399
Glove box 269
Hood 305
Side windows 240
Ski sack roller blind* 246, 264
Soft top 244
Soft top (SmartKey) 251
Soft top (switch) 247
Trunk 106
Trunk from the inside 107
Windows 239
Windows with SmartKey 242
Windows with soft top switch 241