Page 328 of 506

327 Operation
Tires and wheels
General:
Depending on the design standards used,
the tire size molded into the sidewall may
have no letter or a letter preceding the tire
size designation.
No letter preceding the size designation
(as illustrated above): Passenger car tire
based on European design standards.
Letter “P” preceding the size designation:
Passenger car tire based on U.S. design
standards.
Letter “LT” preceding the size designation:
Light Truck tire based on U.S. design
standards.
Letter “T” preceding the size designation:
Temporary spare tires which are high
pressure compact spares designed for
temporary emergency use only. Tire width
The tire width1 (
page 326) indicates
the nominal tire width in mm.
Aspect ratio
The aspect ratio2 (page 326) is the
dimensional relationship between tire
section height and section width and is
expressed in percentage. The aspect ratio
is arrived at by dividing section height by
section width. Tire code
The tire code3 (
page 326) indicates
the tire construction type. The “R” stands
for radial tire type. Letter “D” means diag-
onal or bias ply construction; letter “B”
means belted-bias ply construction.
At the tire manufacturer’s option, any tire
with a speed capability above 149 mph
(240 km/h) can include a “ZR” in the size
designation (for example: 245/40 ZR 18).
For additional information, see “Tire speed
rating” (
page 328).
Rim diameter
The rim diameter4 (
page 326) is the
diameter of the bead seat, not the
diameter of the rim edge. Rim diameter is
indicated in inches (in).
Page 336 of 506

335 Operation
Tires and wheels
Tire ply material
1Plies in sidewall
2Plies under tread
This marking tells you about the type of
cord and number of plies in the sidewall
and under the tread.
Tire and loading terminology
Accessory weight
The combined weight (in excess of those
standard items which may be replaced) of
automatic transmission, power steering,
power brakes, power windows, power
seats, radio, and heater, to the extent that
these items are available as
factory-installed equipment (whether
installed or not).
Air pressure
The amount of air inside the tire pressing
outward on each square inch of the tire.
Air pressure is expressed in pounds per
square inch (psi), or kilopascal (kPa) or
bars.
Aspect ratio
Dimensional relationship between tire
section height and section width
expressed in percentage.
Warning!
G
The temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, underin-
flation, or excessive loading, either sepa-
rately or in combination, can cause
excessive heat build-up and possible tire
failure.
iFor illustration purposes only. Actual
data on tires is specific to each vehicle
and may vary from data shown in above
illustration.
Page 399 of 506

398 Practical hintsUnlocking/locking in an emergencyUnlocking the trunk
A minimum height clearance of 5.41 ft
(1.65 m) is required to open the trunk lid.
The trunk lid lock is located next to the
handle above the rear license plate recess.
1Unlocking in an emergency
2Handle
Insert the mechanical key into the
trunk lid lock until it stops.
Turn the mechanical key
counterclockwise to position1 and
hold it in this position.
Pull the trunk lid handle2 and lift the
trunk lid.
The trunk opens.
Turn the mechanical key back and
remove it from the trunk lid lock.
Locking the vehicle
If you are unable to lock the vehicle with
the SmartKey, do the following:
Close the passenger door and the
trunk lid.
Press the central locking switch in the
center console (
page 110).
Check to see whether the locking knob
on the passenger door have moved
down.
If necessary push it down manually.
Except for the driver’s door, the vehicle
should now be locked.
! Always make sure there is sufficient
overhead clearance.
Page 452 of 506
451 Technical data
Main dimensions
Main dimensions
Model
CLK 320
CLK 500
CLK 55 AMG
Overall vehicle length
182.8 in (4 643 mm)
182.8 in (4 643 mm)
182.8 in (4 643 mm)
Overall vehicle width
68.5 in (1 740 mm)
68.5 in (1 740 mm)
68.5 in (1 740 mm)
Overall vehicle height
55.4 in (1 406 mm)
55.4 in (1 408 mm)
55.4 in (1 408 mm)
Overall vehicle height when
opening/closing soft top
80.9 in (2 055 mm)
81.0 in (2 057 mm)
80.6 in (2 047 mm)
Wheelbase
106.9 in (2 715 mm)
106.9 in (2 715 mm)
106.9 in (2 715 mm)
Track, front
58.8 in (1 493 mm)
58.9 in (1 497 mm)
58.9 in (1 497 mm)
Track, rear
58.0 in (1 474 mm)
58.2 in (1 478 mm)
58.2 in (1 478 mm)
Page 468 of 506

467 Index
A
ABS 25, 84, 461
Malfunction indicator lamp 354
Messages in display 366
Accelerator position, automatic
transmission 170
Accessory weight 335
Accident
In case of 54
Activating
Air conditioning (cooling) 188, 198
Air recirculation mode 186, 196
Anti-theft alarm system 90
Automatic climate control* 191
Central locking (control system) 155
Charcoal filter 197
Climate control 181
Climate control system 183
Defrosting 185
Automatic climate control* 195
Easy-entry/exit feature 156ESP 88
Exterior headlamps 50
Exterior lamps 123
Exterior rear
view mirror parking position 177
Front and rear fog lamp 125
Hazard warning flasher 128
Headlamps 50
High beams 126
Ignition 34
Ignition with KEYLESS-GO* 36
Immobilizer 56, 89
Rear window defroster 179
Residual heat 199
Seat ventilation* 118
Tow-away alarm 91
Windshield wipers 52
Adding
Coolant 310
Engine oil 309
Additional turn signals 414
Adjustable air vents, rear
passenger compartment 189, 200Adjusting 37
Air distribution 184, 194
Air volume 184, 194
Backrest tilt 38
Exterior rear view mirror 41
Head restraint height 38
Head restraint tilt 39
Instrument cluster illumination 130
Interior rear view mirror 41
Mirrors 41
Multicontour seat* 116
Seat cushion depth 116
Seat cushion tilt 38
Seat fore and aft adjustment 38
Seat height 38
Seats 37
Steering column in/out 41
Steering column up/down 41
Steering wheel 40
Adjusting air
distribution and volume 184
Adjusting sound functions 205
Adjusting the volume 205
Aids for changing fuses 436
Page 479 of 506

478 IndexH
Hands-free microphone 29
Hard plastic trim items
Cleaning 351
Hazard warning flasher 127
Switching off 128
Switching on 128
Head restraints 113
Headlamp cleaning system* 312
Headlamps
Automatic control 123
Bi-Xenon 461
Cleaning 348
Cleaning system* 176, 312
Refilling washer fluid 312
Switching off 56
Switching on 50
Washer fluid 460
Washer system* 460
Headliner
Cleaning 351
Head-thorax air bag 66, 463Height adjustment
Head restraints 38
High beam flasher 126
Replacing bulbs (Bi-Xenon*) 414
Replacing bulbs (Halogen) 414
High beam headlamps
Messages in display 384
Replacing bulbs (Bi-Xenon*) 414
Replacing bulbs (Halogen) 414, 416
Replacing bulbs for
high beam flasher (Bi-Xenon*) 418
Switching on 126
High mounted brake lamp 415
Hood 305
Closing 306
Message in display 382
Opening 305
Hydroplaning 295I
Identification labels 442
Ignition 34, 36
Switching on 47
Immobilizer 89
Activating 89
Deactivating 89
Infant and child restraint systems 72
LATCH child seat anchors 80
Information
About service and warranty 10
Button for Tele Aid 281
Inside rear view mirror
Auto-dimming 176
Installing
Floormates* 275
Towing eye bolt 434
Towing eye bolt (CLK 55 AMG) 435
Wind screen 253
Wiper blades 421
Page 486 of 506

485 Index
Positions (Memory function)
Recalling from memory 120
Storing into memory 120
Potential problems associated
with underinflated
and overinflated tires 325
Power assistance 291
Power seat
Adjusting backrest tilt 38
Adjusting head restraint height 38
Adjusting head restraint tilt 39
Adjusting seat cushion tilt 38
Adjusting seat height 38
Front seat head restraints 114
Seat fore and aft adjustment 38
Power train 464
Power washer 346
Power windows 239
Blocking of rear window operation 82
Side windows 239
Synchronizing 243Practical hints
Collapsible wheel chock 394
First aid kit 391
Fuses 436
Lamp in center console 361
Lamps in instrument cluster 354
Messages in the display 363
Minispare wheel 394
Minispare wheel bolts 396
Towing the vehicle 432
Unlocking/locking
in an emergency 397
Vehicle jack 393
Vehicle tool kit 391
Premium unleaded gasoline 456
Problems
While driving 54
With vehicle 17
Product information 9
Production options weight 337
Program mode selector switch 464
Automatic transmission 169
PSI 337Q
Quick search
Phone book* 162
R
Radio
Selecting stations 139
Radio operation 209
Radio see Radio operation
Radio transmitters,
control and operation 299
Radio*
Selecting stations (satellite) 140
Range (distance to empty)
Calling up 159
Reading lamp 29
Rear fog lamp 415
Bulb 415
Switching on 125
Rear lamp bulbs
Replacing 420
Rear lamps see Tail lamps
Rear passenger compartment
Adjustable air vents 200
Rear passenger compartment
Adjustable air vents 189
Page 491 of 506

490 IndexSoft top 244, 465
Cleaning 347
Closing (SmartKey) 252
Closing (switch) 248
Emergency operations 403
Locking after raising/lowering 250
Luggage cover 245
Manual operations 403
Message in display 389
Opening (SmartKey) 251
Opening (switch) 247
Opening and closing 244
Opening and closing
windows with 241
Unlocked status when stopped 250
Unlocked status while driving 250
Wind screen 253
Soft top switch 247, 248
Sound system 201
Sound system* 206
Spare fuses 436
Spare parts service see Parts service
Speed
Setting current 256Speed settings
Cruise control 258
To last stored speed
(“Resume” function)
in Cruise control 259
Speed shift 465
Speedometer 25
Settings units 145
Speedometer display mode
Selecting 145
SRS 69, 465
Indicator lamp 360
SRS indicator lamp 61
Standing lamps 122
Replacing bulbs 414, 415, 417, 419
Standing water
Driving instructions 298
Starter switch 23, 34
Positions 34
Starting difficulties 48
Starting position 34
Starting the engine 46
Station (satellite radio)
selecting 215Steering column
In/out adjustment 41
Up/down adjustment 41
Steering gear oil
Message in display 389
Steering wheel 40
Adjusting 40
Buttons 26
Cleaning 351
Height adjustment 41
Steering wheel gearshift control 171
CLK 500 only 171
CLK 55 AMG only 172
Stolen vehicle
Tracking services 283
Stopping
Windows 241
Storage bags 272
Storage box 271
Storage compartments 269
Armrest 270
Cup holder 272
Glove box 269
Parcel net 272
Storage bags 272
Storage box 271
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