Page 400 of 440

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.
Page 401 of 440

401 Technical terms
Remote Vehicle Diagnostics
Transmission of vehicle data and cur-
rent location to the Mercedes-Benz
Customer Assistance Center for sub-
scribers to Tele Aid service.
REST
(Residual engine heat utilization)
Feature that uses the engine heat
stored in the coolant to heat the vehi-
cle interior for a short time after the en-
gine has been turned off.
Restraint systems
Seat belts, belt tensioners, airbags and
child restraint systems. As indepen-
dent systems, their protective func-
tions complement one another.RON
(R
esearch O
ctane N
umber)
The Research Octane Number for gaso-
line as determined by a standardized
method. It is an indication of a gaso-
line's ability to resist undesired detona-
tion (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.Shift lock
When the vehicle is parked, this lock
prevents the gear selector lever from
being inadvertently moved out of
positionP without SmartKey turned
and brake pedal depressed.
Speedshift (CLK 55 AMG)
Steering wheel gearshift control. You
can change the gears yourself with the
steering wheel gearshift buttons.
SRS
(S
upplemental R
estraint S
ystem)
Seat belts, emergency tensioning de-
vice and airbags. Though independent
systems, they are closely interfaced to
provide effective occupant protection.
Page 406 of 440

406 IndexBattery, vehicle 288, 363
Charging 364
Disconnecting 364
Messages in display 320
Reconnecting 365
Reinstalling 364
Removing 364
Bi-Xenon headlamps* 397
Block heater* 295
Blocking
Rear window operation 74
Bolts
For Minispare wheel 342
Brake assist system (BAS) 397
Brake fluid 390
Message in display 321
Brake lamp bulbs 351
Brake lamp, high mounted 351
Brake pads
Message in display 321
Brakes 268
Warning lamp 307
Break-in period 266Bulbs, replacing 350
Additional turn signals 351
Backup lamps 351
Brake lamps 351
Fog lamps 351
Front lamps 351
High beam (Bi-Xenon*) 351
High beam (Halogen) 351
High beam flasher (Bi-Xenon*) 351
High beam flasher (Halogen) 351
High mounted brake lamp 351
License plate lamps 351, 356
Low beam (Bi-Xenon*) 351
Low beam (Halogen) 351
Parking lamps 351, 353, 355
Rear fog lamp 351
Rear fog lamps 356
Side marker lamps 351, 355
Standing lamps 351, 353, 355
Tail lamp assemblies 351, 356
Turn signal lamps 351
Button
Audio system 186C
CAC (Customer Assistance Center) 398
Calling up
Distronic* settings 137
Range (distance to empty) 153
Service indicator 297
CAN system 398
Canceling
Cruise control 219
Capacities
Fuels, coolants, lubricants, etc. 388
Cargo tie-down rings 243
Cassette operation
Playing cassettes 196
Cassette player
Operating 136
Catalytic converter 275
CD changer* 199
CD operation 199
CD player
Operating 136
Page 409 of 440

409 Index
Convenience submenu 149
Activating
easy-entry/exit feature 150
Setting key-dependency 151
Setting parking position
for exterior rear view mirror 151
Coolant 286, 392
Adding 287
Anticorrosion/antifreeze
quantity 392
Capacities 388
Checking level 286
Messages in display 322
Temperature 277
Temperature indicator 127
Warning lamp 309, 323
Coolant level
Checking 286Cruise control 218, 398
Canceling 219
Driving downhill 219
Driving uphill 219
Fine adjustment 220
Lever 225
Messages in display 317
Setting current speed 219
Setting to last stored speed
("Resume" function) 220
Cruise control lever 218
Cup holder
Cleaning 303
Closing 245
In rear seat armrest 245
In the dashboard 245
Opening 245
Customer Assistance Center (CAC) 398D
Daytime running lamp mode 121
Setting 145, 146
Deactivating
Air conditioning (cooling) 181
Air recirculation mode 179
Alarm 82
Anti-theft alarm system 82
Automatic climate control 173
Central locking (control system) 149
Defrosting 177
Distance warning function* 230
Distronic* 225, 228
Engine with KEYLESS-GO* 54
Engine with the SmartKey 53
ESP 79
Exterior lamps 120
Hazard warning flasher 124
Headlamps 53
Immobilizer 81
Interior lighting
delayed switch-off 148
Manual shift programm
CLK 55 AMG 165
Rapid seat heating*
with seat ventilation* 115
Page 421 of 440

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
Page 424 of 440

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