Contents
Safety and Security........................... 63
Occupant safety................................... 64
Air bags .......................................... 65
Occupant Classification System ..... 72
Seat belts ....................................... 77
Active head restraints .................... 81
Roll bars (only CLK cabriolet) ......... 82
Children in the vehicle .................... 83
Blocking of rear
side window operation ................... 88
Panic alarm .......................................... 89
Activating ....................................... 89
Deactivating ................................... 89
Driving safety systems ......................... 90
ABS ................................................ 90
BAS ................................................ 92
ESP
®............................................... 92
Anti-theft systems................................ 97
Immobilizer..................................... 97
Anti-theft alarm system .................. 97
Controls in detail............................... 99
Locking and unlocking ....................... 100
SmartKey ..................................... 100
SmartKey with KEYLESS-GO* ...... 103
Checking the batteries in the
SmartKey or SmartKey with
KEYLESS-GO* .............................. 108
Loss of the SmartKey or
SmartKey with KEYLESS-GO* ...... 109
Opening the doors from the inside 109
Opening the trunk ........................ 110
Closing the trunk.......................... 112
Trunk emergency release ............. 117
Valet locking ................................ 118
Automatic central locking ............ 118
Locking and unlocking
from the inside ............................. 119
Seats ................................................. 120
Front seat active head restraints . 120
Rear seat head restraints
(CLK coupe) ................................. 120
Rear seat head restraints
(CLK cabriolet) ............................. 123
Multicontour seat* ....................... 124
Seat heating* ............................... 125Seat ventilation* .......................... 126
Memory function ............................... 127
Storing positions into memory ..... 128
Recalling positions from memory . 128
Lighting ............................................. 129
Exterior lamp switch .................... 129
Combination switch ..................... 133
Corner-illuminating
front fog lamps* (With Bi-Xenon*
headlamps only)........................... 133
Hazard warning flasher ................ 135
Interior lighting ............................ 136
Door entry lamps ......................... 137
Trunk lamp ................................... 137
Instrument cluster ............................. 138
Adjusting instrument cluster
illumination .................................. 138
Coolant temperature indicator ..... 139
Resetting trip odometer ............... 139
Tachometer .................................. 140
Clock............................................ 140
Outside temperature indicator ..... 140
Control system .................................. 141
Multifunction display.................... 141
Multifunction steering wheel........ 142
Menus .......................................... 144
Contents
At the gas station .............................. 320
Refueling ...................................... 320
Check regularly
and before a long trip................... 322
Engine compartment ......................... 323
Hood ............................................ 323
Engine oil ..................................... 325
Transmission fluid level ................ 327
Coolant ........................................ 328
Battery ......................................... 329
Windshield washer system and
headlamp cleaning system* ......... 330
Tires and wheels ................................ 331
Important guidelines .................... 331
Tire care and maintenance........... 332
Direction of rotation ..................... 334
Loading the vehicle ...................... 334
Recommended
tire inflation pressure ................... 339
Checking tire inflation pressure ... 341
MOExtended system* .................. 348
Tire labeling.................................. 348
Load identification ....................... 352
DOT,
Tire Identification Number (TIN) ... 353
Maximum tire load ....................... 354Maximum tire inflation pressure ... 355
Uniform Tire Quality Grading
Standards (U.S. vehicles) .............. 356
Tire ply material ............................ 357
Tire and loading terminology......... 358
Rotating tires ................................ 361
Winter driving ..................................... 362
Winter tires ................................... 362
Block heater (Canada only) ........... 363
Snow chains.................................. 363
Maintenance....................................... 364
Maintenance service
indicator message......................... 364
Clearing the maintenance
service indicator message ............ 365
Maintenance
service term exceeded.................. 365
Calling up the maintenance
service indicator display ............... 366
Resetting the maintenance
service indicator ........................... 366
Vehicle care........................................ 367
Cleaning and care of vehicle ......... 367
Practical hints.................................. 377
What to do if …? ................................. 378
Lamps in instrument cluster ......... 378
Lamp in center console ................ 390
Vehicle status messages
in the multifunction display .......... 392
Where will I find...? ............................. 421
First aid kit.................................... 421
Storage compartment
underneath the trunk floor............ 421
TIREFIT (CLK 63 AMG only)........... 422
Vehicle tool kit.............................. 422
Minispare wheel............................ 425
Spare wheel bolts ......................... 426
Unlocking/locking in an emergency .. 427
Unlocking the vehicle ................... 427
Locking the vehicle ....................... 428
Manually unlocking
the gear selector lever .................. 429
Opening/closing
in an emergency (Cabriolet) ............... 430
Operating roll bars manually ......... 430
Soft top emergency operation ...... 432
Contents
Resetting activated head restraints ... 440
Resetting
activated head restraints.............. 440
Replacing SmartKey batteries ............ 441
SmartKey / SmartKey
with KEYLESS-GO* ....................... 442
Replacing bulbs ................................. 443
Bulbs ............................................ 444
Replacing bulbs for front lamps.... 446
Replacing bulbs for rear lamps ..... 448
Replacing wiper blades ...................... 450
Removing and installing
wiper blades ................................. 450
Flat tire .............................................. 452
Preparing the vehicle.................... 452
Sealing tires with TIREFIT
(CLK 63 AMG only) ....................... 452
Mounting the Minispare wheel ..... 458
MOExtended system*................... 463
Battery ............................................... 464
Disconnecting the battery ............ 465
Removing the battery ................... 465
Charging and
reinstalling the battery ................. 466
Reconnecting the battery ............. 466
Jump starting ..................................... 467Towing the vehicle ............................. 469
Towing the vehicle ....................... 469
Installing towing eye bolt ............. 470
Fuses ................................................. 472
Fuse box
in passenger compartment .......... 472
Fuse box
in engine compartment ................ 473
Fuse box
in trunk ........................................ 474
Technical data................................. 475
Parts service ...................................... 476
Warranty coverage............................. 477
Loss of Service and Warranty
Information Booklet ..................... 477
Identification labels ........................... 478
Layout of poly-V-belt drive ................. 480
CLK 350 / CLK 550 ..................... 480
CLK 63 AMG ................................ 480
Engine................................................ 481
Rims and tires.................................... 482
Same size tires ............................. 483
Mixed size tires ............................ 484
Minispare wheel ........................... 486Electrical system ............................... 487
Main dimensions and weights ........... 488
Main dimensions .......................... 488
Weights ........................................ 488
Fuels, coolants, lubricants, etc. ......... 489
Capacities .................................... 489
Engine oils ................................... 491
Engine oil additives ...................... 491
Air conditioning refrigerant .......... 491
Brake fluid.................................... 491
Premium unleaded gasoline ......... 492
Fuel requirements ........................ 492
Gasoline additives ........................ 493
Coolants ...................................... 494
Windshield washer system
and headlamp cleaning system* .. 496
Index................................................. 497
29 At a glance
Instrument cluster
ItemPage
1LLeft turn signal indica-
tor lamp56
2vESP® warning lamp384
3Speedometer
4Multifunction display141
5lDistance warning
lamp
Warning lamp without func-
tion. It illuminates with the ig-
nition on. It should go out
when the engine is running.
6KRight turn signal indi-
cator lamp56
7Coolant temperature
indicator with:139
•Coolant temperature
warning lamp382
8Tachometer with:140
1Supplemental
Restraint System
(SRS) indicator lamp64,
387
ItemPage
-Antilock Brake Sys-
tem (ABS) indicator
lamp378
AHigh beam headlamp
indicator lamp133
BLow beam headlamp
indicator lamp129
9Main odometer with:
Gear selector lever
position174
Program mode178
aClock with:140
;Brake warning lamp,
USA only380
3Brake warning lamp,
Canada only380
ItemPage
úEngine malfunction in-
dicator lamp,
USA only381
±Engine malfunction in-
dicator lamp,
Canada only381
HCombination low tire
pressure/TPMS
malfunction telltale388
CRoll bar warning lamp
(CLK cabriolet)385
bFuel display with:
AFuel reserve warning
lamp385
cReset button for:
Resetting trip odometer139
Adjusting instrument
cluster illumination138
Confirming new time set-
tings160
56 Getting started
Driving
Turn signals
Combination switch
1Turn signals, right
2Turn signals, left
Press the combination switch in
direction of arrow1or2.
The corresponding turn signal indicator
lampLorK in the instrument
cluster flashes (
page 28).
The combination switch resets
automatically after major steering wheel
movements.
Windshield wipers
Combination switch
1Single wipe
Wiping with windshield washer fluid
2Switching on windshield wipers
Switch on the ignition (page 38).Switching on windshield wipers
Turn the combination switch to the de-
sired position depending on the
intensity of the rain.
0Windshield wipers off
IIntermittent wiping
IINormal wiper speed
IIIFast wiper speed
iTo signal minor directional changes such as
changing lanes, press the combination switch
only to the point of resistance and release. The
corresponding turn signals will flash three times.!Do not operate the windshield wipers when
the windshield is dry. Dust that accumulates on
a windshield might scratch the glass and/or
damage the wiper blades when wiping occurs on
a dry windshield. If it is necessary to operate the
windshield wipers in dry weather conditions, al-
ways operate the windshield wipers with wind-
shield washer fluid (
page 57).
68 Safety and Security
Occupant safety
Safety guidelines for the seat belt,
emergency tensioning device and
air bagiAir bags are designed to deploy only in cer-
tain frontal impacts (front air bags) and in side
impacts (CLK coupe: front side impact air bags,
rear side impact air bags*, and window curtain
air bags. CLK cabriolet: head-thorax air bags and
rear side impact air bags*) which exceed preset
thresholds. Only during these events will they
provide their supplemental protection.
The driver and passenger should always wear
their seat belts. Otherwise it is not possible for
the air bags to provide their supplemental
protection.
In case of other types of impacts and impacts be-
low air bag deployment thresholds, air bags will
not deploy. The driver and passenger will then be
protected to the extent possible by a properly
fastened seat belt. A properly fastened seat belt
is also needed to provide the best possible
protection in a rollover.
We caution you not to rely on the presence of the
air bags in order to avoid wearing your seat belt.
It is important to your safety and that of your pas-
sengers that you replace deployed air bags and
repair any malfunctioning air bags to make sure
the vehicle will continue to provide supplemental
crash protection for occupants.
Warning!G
Damaged seat belts or belts that were
highly stressed in an accident must be
replaced and their anchoring points
must also be checked. Only use belts in-
stalled or supplied at an authorized
Mercedes-Benz Center.
Air bags and Emergency Tensioning
Devices (ETDs) contain Perchlorate
material, which may require special han-
dling and regard for the environment.
Check with your local government’s dis-
posal guidelines. California residents,
see http://www.dtsc.ca.gov/Hazard-
ousWaste/Perchlorate/index.cfm.
Air bags and emergency tensioning de-
vices (ETDs) are designed to function on
a one-time-only basis. An air bag or ETD
that is deployed must be replaced.
Do not pass belts over sharp edges.
They could tear.
Do not make any modification that could
change the effectiveness of the belts.
Do not bleach or dye seat belts as this
may severely weaken them. In a crash
they may not be able to provide ade-
quate protection.
No modifications of any kind may be
made to any components or wiring of
the SRS. This includes changing or
removing any component or part of the
SRS, the installation of additional trim
material, badges, seat covers
(CLK cabriolet) etc. over the steering
wheel hub, front passenger front air bag
cover, outboard sides of the front seat
backrest (CLK cabriolet), door trim pan-
els (CLK coupe), door frame trims (CLK
coupe), or rear side trim panels, and in-
stallation of additional electrical/elec-
tronic equipment on or near SRS
components and wiring. Keep area be-
tween air bags and occupants free from
objects (e.g. packages, purses, umbrel-
las, etc.).
70 Safety and Security
Occupant safety
Front air bags
1Driver air bag
2Passenger air bag
Driver and front passenger front air bags
are deployed:
in the event of certain frontal impacts
if impact exceeds a preset deployment
threshold
independently of the front side impact
air bag (CLK coupe), head-thorax air
bag (CLK cabriolet) and/or the rear
side impact air bag*The air bags will not deploy in impacts
which do not exceed the system’s deploy-
ment thresholds. You will then be protect-
ed by the fastened seat belts.
The front passenger front air bag will only
be deployed if:the system, based on OCS weight sen-
sor readings, senses that the front pas-
senger seat is occupied
the 56 indicator lamp in the
center console is not lit (
page 76)
the impact exceeds a preset deploy-
ment threshold
CLK coupe:
Front side impact air bags, rear side
impact air bags*, window curtain air
bags
1Front side impact air bag
2Rear side impact air bag*
3Window curtain air bag
iThe front air bags in this vehicle have been
designed to inflate in two stages. This allows the
air bag to have different rates of inflation that are
based on the rate of relevant vehicle decelera-
tion as assessed by the air bag control unit.
On the front passenger side, the front air bag de-
ployment is additionally influenced by the pas-
senger’s weight category as identified by the
Occupant Classification System (OCS)
(
page 72).
The lighter the front passenger side occupant,
the higher the vehicle deceleration rate required
for the second stage inflation of the air bag.
71 Safety and Security
Occupant safety
The front side impact air bags, the rear
side impact air bags*, and the window
curtain air bags are deployed:
on the impacted side of the vehicle
in side impacts exceeding a preset de-
ployment threshold
independently of the front air bags
The front side impact air bags, the rear
side impact air bags*, and the window cur-
tain air bags are not deployed in impacts
which do not exceed the system’s deploy-
ment threshold.CLK cabriolet: Head-thorax air bags
1Head-thorax air bag
The head-thorax air bags1 in the drivers
and front passenger seat are deployed:
on the impacted side of the vehicle
in side impacts exceeding a preset de-
ployment threshold
independently of the front air bagsThe head-thorax air bags1 are not de-
ployed in impacts which do not exceed the
system’s deployment threshold.
Warning!G
Only use seat covers which have been
tested and approved by Mercedes-Benz for
your vehicle model. Using other seat covers
may interfere with or prevent the
deployment of the head-thorax air bags.
Contact your authorized Mercedes-Benz
Center for availability.