
400 Technical termsMemory function*
Used to store three individual seat,
steering wheel and mirror positions for
each SmartKey or, if so equipped,
KEYLESS-GO* feature.
Menu
The control system displays are ar-
ranged in menus. Each menu contains
a number of commands for particular
systems. In the Audio menu, for exam-
ple, you will find the commands
Select
radio station
or Operate CD player
.
Using commands, you can directly
change the settings for your vehicle.
MON
(M
otor O
ctane N
umber)
The Motor Octane Number for gasoline
as determined by a standardized meth-
od. It is an indication of a gasoline's
ability to resist undesired detonation
(knocking). The average of both the
MON (Motor Octane Number) and
->RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.Multifunction display
Display field in the speedometer used
to present information provided by the
control system.
Multifunction steering wheel
Steering wheel with buttons for operat-
ing the control system.
Overspeed range
Engine speeds within the red marking
on the tachometer dial. Avoid this en-
gine speed range, as it may result in se-
rious engine damage that is not
covered by the Mercedes-Benz Limited
Warranty.
Parktronic (Parking assist)*
System which uses visual and acoustic
signals to assist the driver during park-
ing maneuvers.
Poly-V-belt drive
Drives engine-components (alternator,
AC compressor, etc.) from the engine.Power train
Collective term designating all compo-
nents used to generate and transmit
motive power to the drive axles, includ-
ing
engine
clutch/torque converter
transmission
transfer case
drive shaft
differential
axle shafts/axles
Program mode selector switch
Used to switch the automatic transmis-
sion between regular operationS and
comfort operationC.
CLK 55 AMG with steering wheel gear-
shift control and manual shift program:
In addition toS andC (for regularS or
comfortC operation, see above) you
can use theM for manual shift
program.

402 Technical termsTele Aid System
(T
elematic A
larm I
dentification on D
e-
mand)
The Tele Aid system consists of three
types of response: automatic and man-
ual emergency, roadside assistance
and information. Tele Aid is initially ac-
tivated by completing a subscriber
agreement and placing an acquain-
tance call.
The Tele Aid system is operational pro-
vided that the vehicle’s battery is
charged, properly connected, not dam-
aged and cellular and GPS coverage is
available.
Telematics*
A combination of the terms “telecom-
munications” and “informatics”.Tightening torque
Force times lever arm (e.g. a lug
wrench) with which threaded fasteners
such as wheel bolts are tightened.
Tire speed rating
Part of tire designation; indicates the
speed range for which a tire is ap-
proved.
Traction
Force exerted by the vehicle on the
road via the tires.VIN
(V
ehicle I
dentification N
umber)
The number set by the manufacturer
and placed on the body to uniquely
identify each vehicle produced.
Voice control system*
Voice control system for car phones,
portable cell phones and audio sys-
tems (radio, CD, etc.).

404 IndexAir conditioning (cooling)
Turning off 181
Turning on 181
Air conditioning refrigerant 390
Air distribution
Adjusting 176
Air pressure see Tire inflation pressure
Air recirculation mode 178
Activating 178
Deactivating 179
Air vents, rear passenger compartment
Adjustable 182
Air volume
Adjusting 177
Airbags 59
BabySmart
TM
airbag deactivation system 397
Children 60
Front 63
Passenger 63
Safety guidelines 62
Side impact 64
Window curtain 64Alarm
Audible 75, 83, 84
Canceling 83, 84
Visual 82
Alarm system
Anti-theft 82
Alignment bolt 360
Alignment bolt (vehicle tool kit) 397
Anticorrosion/antifreeze 393
Antiglare
Automatic 167
Antilock brake system (ABS) 397
Anti-theft alarm system
Arming 82
Canceling alarm 83, 84
Disarming 82
Anti-theft systems 81
Anti-theft alarm system 82
Immobilizer 81
Tow-away alarm 83
Aquaplaning see Hydroplaning
Armrest
Storage spaces 246Ashtray (Center console) 247
Opening 247
Reinstalling 248
Removing 248
Ashtray (Rear seat) 248
Opening 248
Reinstalling 248
Removing 248
At the gas station 278
ATF (automatic transmission fluid) 286
AUDIO menu 134
Selecting radio station 135
Selecting satellite radio* station 135
Audio system 183
Audio and telephone, operation 183
Button and soft key operation 186
Cassette operation 196
CD operation 199
Operating and display elements 184
Operating safety 183
Operation 186
Radio operation 189
Switching off 186
Switching on 186
Telephone operation 203

408 IndexClosing
Cup holder 245
Glove box 244
Hood 282
Side windows 211
Side windows
with KEYLESS-GO* 94
Sliding/pop-up roof* 214, 348
Sliding/pop-up roof*
with KEYLESS-GO* 94, 213, 217
Sliding/pop-up roof*
with SmartKey 216
Trunk 97
Windows 210
Windows
with KEYLESS-GO* 213, 217
Windows
with SmartKey 212
Closing from the inside
Trunk 99
Closing sliding/pop-up roof*
In an emergency 348
Cockpit 20, 398
Cockpit management
and data system (COMAND*) 398COMAND* 398
COMAND* see
separate operating instructions
Combination switch 123
High beam flasher 48, 123
Turn signals 48
Windshield wipers 48
Comfort driving
Transmission program
mode C (Comfort) 163, 164
Consumer information 395
Control and operation
of radio transmitters 275Control system 129, 398
AUDIO menu 134
Convenience submenu 149
Display digital speedometer 134
Distronic* menu 137
Functions 130, 133
Instrument cluster
submenu 142, 144
Lighting submenu 145
Malfunction memory menu 138
Menus 132, 133, 400
Multifunction display 129
Multifunction steering wheel 130
NAV menu 137
Selecting radio system 135
Selecting satellite radio* system 135
Settings menu 139
Standard display menu 134
Submenus 131, 133
TEL* menu 154
Trip computer menu 152
Trunk lid opening limiter* 149
Vehicle submenu 148

421 Index
Opening
Ashtray (Center console) 247
Ashtray (Rear seat) 248
Cup holder 245
Doors from the inside 95
Fuel filler flap 278
Fuel filler flap manually 347
Glove box 244
Hood 281
Side windows 211
Sliding/pop-up roof* 214, 348
Sliding/pop-up roof*
in an emergency 348
Sliding/pop-up roof*
with SmartKey 216
Trunk 96
Trunk from the inside 97
Windows 210
Windows with SmartKey 212Operating
Audio system 183
Cassette player 136
CD player 136
COMAND* see separate
operating instructions
Navigation system 137
Radio 135
Radio transmitters 275
Telephone* 154, 183, 203
Vehicle outside the
USA and Canada 13
Operating safety
Audio system 183
Operator’s Manual 10
Ornamental moldings 300
Outside temperature indicator 128
Overdue service 296
Overhead control panel 27
Overspeed range 400P
Paintwork 299
Panic alarm 75
Panic button on SmartKey 75
Parcel net in
front passenger footwell 247
Parking 51, 269
Parking assist* see Parktronic*
Parking brake 46, 52
Engaging 52
Message in display 321
Releasing 46
Parking lamps
Replacing bulbs 351, 353, 355
Switching on 119
Parking position
Exterior rear
view mirrors 118, 151, 168
Parktronic* 233, 400
Sensor 301
Parts see Spare parts service
PASS. AIRBAG OFF indicator lamp 313

423 Index
Q
Quick search
Phone book* 156
R
Radio
Selecting stations 135
Selecting stations (satellite*) 135
Station search 135
Station selection setting 148
Radio operation 189
Radio see Radio operation
Radio transmitters, control and
operation 275
Range (distance to empty)
Calling up 153
Reading lamp 27
Rear bench seat
Foldable 240
Rear fog lamp 351
Bulb 351
Switching on 122
Rear lamp bulbs
Replacing 356
Rear lamps see Tail lampsRear passenger compartment
Adjustable air vents 182
Rear seat head restraints
Folding back with release button 109
Folding back with switch 110
Installing 111
Placing upright 110
Rear seats 109
Removing 111
Rear seats
Rear seat head restraints 109
Rear view mirror automatic antiglare 167
Rear view mirrors see Mirrors
Rear window
Blocking operation 74
Rear window defroster 171
Activating 171
Deactivating 171
Rear window sunshade* 170
Reconnecting
Vehicle battery 365
Refrigerant
Air conditioning 390Refueling 278
Regular checks 280
Reinstalling
Ashtray (Center console) 248
Ashtray (Rear seat) 248
Reinstalling vehicle battery 364
Remote controls
SmartKey 86, 90
SmartKey with KEYLESS-GO* 89
Remote door unlock
With Tele Aid 258
Remote Vehicle Diagnostics 401
Removing
Ashtray (Center console) 248
Ashtray (Rear seat) 248
Floormates* 249
Minispare wheel 340
Ski sack* 240
Vehicle battery 364
Vehicle tool kit 337
Wheel 360
Wiper blades 357

424 IndexReplacing
Backup lamp bulbs 356
Brake lamp bulbs 356
Bulbs 350
Front lamp bulbs 352
Front turn signal bulbs 355
Front turn signal bulbs (Halogen) 353
Fuses 374
High beam bulb for
high beam flasher (Bi-Xenon*) 354
High beam bulbs (Halogen) 353
License plate lamp bulbs 356
Low beam bulbs (Halogen) 353
Parking lamp bulbs 353, 355
Rear fog lamp bulbs 356
Rear lamp bulbs 351, 356
Rear turn signal bulbs 356
Side marker lamp bulbs 355
Standing lamp bulbs 353, 355
Wiper blades 357
Reporting
Safety defects 18
Reset button in the instrument
cluster 139Resetting
All functions (control system) 139
All functions of a submenu 140
Fuel consumption 153
Service indicator (FSS) 297
Trip odometer 127
Residual heat utilization 181, 401
Residual ventilation 181
REST
(Residual engine heat utilization) 401
Restraint system see
Infant and child restraint systems 72
Restraint systems 401
Rims 381
Roadside Assistance
Tele Aid 254
Roadside assistance 12
RON 279
RON (Research Octane Number) 401
Roof rack 237
Rotating wheels 293
Rubber parts
Cleaning 304S
Safety
Occupant 58
Safety belts see Seat belts
Safety defects
Reporting 18
Safety systems
Driving 76
Searching
Radio station 135
Seat belt force limiter 67
Seat belts 64
Cleaning 303
Fastening 40
Proper use of 42, 66
Safety guidelines 62
Warning lamp 311
Seat cushion depth
Adjusting 112

428 IndexStarter switch 21, 31
Positions 31
Starting difficulties 45
Starting position 31
Starting the engine 43
Station (radio)
Search 135
Station selection
Setting 148
Steering column
In/out adjustment 38
Up/down adjustment 38
Steering gear oil
Message in display 335
Steering wheel 37
Adjusting 37
Buttons 24
Cleaning 303
Height adjustment 38
Steering wheel gearshift control
(CLK 55 AMG) 161
Activating 164
Deactivating 165
Downshifting 162
Upshifting 162Stolen vehicle
Tracking services 259
Stopping
Sliding/pop-up roof* 216
Windows 212
Storage bags 247
Storage compartments
Glove box 244
Storage spaces
Cup holder 245
Storing
Minispare wheel 340
Storing (Memory function)
Positions into memory 117
Submenus
Convenience 149
For settings 131
In control system 133
Instrument cluster 142, 144
Lighting 145
Resetting functions
in Control system 140
Selecting 140
Settings menu 140
Vehicle 148Sun visors 169
Sunroof*
Message in display 336
Supplemental Restraint System
(SRS) 401
Switching off
Audio system 186
Automatic central locking
(control system) 149
Engine 53
ESP 79
Hazard warning flasher 124
Headlamps 53
Rapid seat heating*
with seat ventilation* 115
Rapid seat heating*
without seat ventilation* 114
Seat heating*
with seat ventilation* 115
Seat heating*
without seat ventilation* 114
Trunk lid opening limiter*
(control system) 149