engine MERCEDES-BENZ CLK350 2008 C209 Owner's Manual

Our company and staff congratulate you
on the purchase of your new
Mercedes-Benz.
Your selection of our product is a demon-
stration of your trust in our company
name. Furthermore, it exemplifies your
desire to own an automobile that will be as
easy as possible to operate and provide
years of service.
Your Mercedes-Benz represents the ef-
forts of many skilled engineers and crafts-
men. To help assure your driving pleasure,
and also the safety of you and your passen-
gers, we ask you to make a small invest-
ment of time:
Please read this manual carefully, then
return it to your vehicle where it will be
handy for your reference.

Please follow the recommendations
contained in this manual. They are de-
signed to acquaint you with the opera-
tion of your Mercedes-Benz.

Please pay attention to the warnings
and cautions contained in this manual.
They are designed to help improve the
safety of the vehicle operator and
occupants.
We extend our best wishes for many miles
of safe, pleasurable driving.
Mercedes-Benz USA, LLC
A DaimlerChrysler Company

Contents
Introduction.......................................... 9
Product information ................................ 9
Operator’s Manual ............................... 10
Service and warranty information .. 10
Important notice for California
retail buyers and lessees of
Mercedes-Benz automobiles .......... 11
Maintenance .................................. 12
Roadside Assistance ...................... 12
Change of address or ownership.... 12
Operating your vehicle
outside the USA or Canada ............ 13
Where to find it .................................... 14
Symbols ............................................... 15
Operating safety .................................. 16
Proper use of the vehicle ............... 16
Problems with your vehicle .................. 17
Reporting safety defects...................... 18
Reporting safety defects ................ 18
Vehicle data recording......................... 19
Information regarding electronic
recording devices........................... 19At a glance.......................................... 21
Exterior view (Coupe) ........................... 22
Exterior view (Cabriolet) ....................... 24
Cockpit ................................................. 26
Instrument cluster ................................ 28
Multifunction steering wheel ................ 30
Center console ..................................... 31
Upper part ...................................... 31
Lower part ...................................... 32
Overhead control panel ........................ 33
Door control panel................................ 34Getting started................................... 35
Unlocking ............................................. 36
Unlocking with the SmartKey ......... 36
Unlocking with KEYLESS-GO*......... 37
Starter switch positions .................. 38
Adjusting .............................................. 41
Seats .............................................. 41
Steering wheel ................................ 44
Mirrors ............................................ 47
Driving .................................................. 48
Fastening the seat belts ................. 48
Starting the engine ......................... 51
Parking brake ................................. 53
Driving ............................................ 54
Switching on headlamps ................. 55
Turn signals .................................... 56
Windshield wipers ........................... 56
Problems while driving.................... 58
Parking and locking .............................. 59
Parking brake ................................. 59
Switching off headlamps................. 60
Turning off the engine ..................... 60
Releasing seat belts........................ 61
Locking ........................................... 61

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

13 Introduction
Operator’s Manual
Operating your vehicle outside the USA
or Canada
If you plan to operate your vehicle in for-
eign countries, please be aware that:

service facilities or replacement parts
may not be readily available,

unleaded gasoline for vehicles with cat-
alytic converters may not be available;
the use of leaded fuels will damage the
catalysts,

gasoline may have a considerably low-
er octane rating, and improper fuel can
cause engine damage.Certain Mercedes-Benz models are avail-
able for delivery in Europe under our Euro-
pean Delivery Program. For details, consult
an authorized Mercedes-Benz Center or
write to:
In the USA:
Mercedes-Benz USA, LLC
European Delivery Department
One Mercedes Drive
Montvale, NJ 07645-0350
In Canada:
Mercedes-Benz Canada Inc.
European Delivery Department
98 Vanderhoof Avenue
Toronto, Ontario M4G 4C9

16 Introduction
Operating safety
Proper use of the vehicle
Proper use of the vehicle requires that you
are familiar with the following information
and rules:

the safety precautions in this manual

the “Technical data” section in this
manual

traffic rules and regulations

motor vehicle laws and safety
standards
Warning!G
Work improperly carried out on electronic
components and associated software could
cause them to cease functioning. Because
the vehicle’s electronic components are
interconnected, any modifications made
may produce an undesired effect on other
systems. Electronic malfunctions could
seriously impair the operating safety of your
vehicle.
See an authorized Mercedes-Benz Center
for repairs or modifications to electronic
components.
Other improper work or modifications on the
vehicle could also have a negative impact on
the operating safety of the vehicle.
Some safety systems only function while the
engine is running. You should therefore
never turn off the engine while driving.
Warning!G
Heavy blows against the vehicle underbody
or tires / wheels, for example when running
over an obstacle, road debris or a pothole,
may cause serious damage to and impair the
operating safety of your vehicle. If you feel a
sudden significant vibration or ride distur-
bance, or you suspect that damage to your
vehicle has occurred, you should turn on
your hazard warning flashers, carefully slow
down, and drive with caution to an area
which is a safe distance from the road.
Inspect the vehicle underbody and
tires / wheels for possible damage. If the
vehicle appears unsafe, have it towed to the
nearest authorized Mercedes-Benz Center
or other qualified maintenance or repair
facility for further inspection or repairs.
Warning!G
Various warning labels are attached to your
vehicle. These warning labels are intended
to make you and others aware of various
risks. You should not remove any of these
warning labels unless explicitly instructed to
do so by information on the label itself.
Removal of any of these labels may cause
you and others to be unaware of certain
risks which may result in an accident and/or
personal injury.

23 At a glance
Exterior view (Coupe)
ItemPage
1Trunk
Unlocking
Opening and closing
Minispare wheel
Vehicle tool kit
36
110,
112
425
423
2Rear lamps444
3Rear window, defrosting189
4Fuel filler flap
Refueling
Gasoline320
320
492
5Doors
Locking and unlocking
Opening
Locking/unlocking in an
emergency
36, 62,
100
109
427
ItemPage
6Exterior rear view mirror
Adjusting
Auto-dimming rear view
mirrors
47
186
7Tires and wheels
Checking tire inflation pres-
sure
Run Flat Indicator
(Canada only)
Tire Pressure Monitoring
(USA only)
General information
Vehicle tool kit
Minispare wheel
Flat tire331
341
342
344
331
422
425
452
8Towing
Installing towing eye bolt469
470
9Front lamps446
ItemPage
aHood, opening
Engine oil
Coolant
Battery323
325
328
329
bWindshield wipers
Wiper blades, replacing
Wiper blades, cleaning56
450
373
cWindshield
Front window, defrosting
Cleaning with wiper fluid
Cleaning
191,
201
57
373
dPower tilt/sliding sunroof
Opening and closing
Opening and closing in an
emergency
257
430

25 At a glance
Exterior view (Cabriolet)
ItemPage
1Trunk
Unlocking
Opening and closing
TIREFIT Kit (CLK 63 AMG)
Minispare wheel
Vehicle tool kit
103
110, 112
422
425
422
2Rear lamps448
3Rear window, defrosting189
4Fuel filler flap
Refueling
Gasoline320
320
492
5Doors
Locking and unlocking
Locking/unlocking in an
emergency
36, 62,
100
427
ItemPage
6Exterior rear view mirror
Adjusting
Auto-dimming rear view
mirrors
47
186
7Tires and wheels
Checking tire inflation
pressure
Run Flat Indicator
(Canada only)
Tire Pressure Monitoring
(USA only)
General information
TIREFIT Kit (CLK 63 AMG)
Vehicle tool kit
Minispare wheel
Flat tire331
341
342
344
331
452
422
458
452
8Towing
Installing towing eye bolt469
470
9Front lamps446
ItemPage
aHood, opening
Engine oil
Coolant
Battery323
325
328
329
bWindshield wipers
Wiper blades, replacing
Wiper blades, cleaning56
450
373
cWindshield
Front window, defrosting
Cleaning with wiper fluid
Cleaning
191, 201
57
373
dSoft top
Opening and closing
Opening and closing in
an emergency
Roll bars
Cleaning
260
420
82
370

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
385
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

37 Getting started
Unlocking
For more information, see “SmartKey”
(
page 100).
Unlocking with KEYLESS-GO*
With the KEYLESS-GO function, you can
lock and unlock the vehicle without using
the remote control buttons on the
SmartKey and start the engine without in-
serting the SmartKey in the starter switch.Pull an outside door handle.

All turn signal lamps flash once.

An acoustic signal sounds once.
For more information, see “Factory
setting” (
page 106).

The locking knobs in the doors
move up.

The anti-theft alarm system is dis-
armed.
Enter the vehicle.
For more information, see “SmartKey with
KEYLESS-GO*” (
page 103).
Warning!G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take it
with you, and lock the vehicle. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. A child’s
unsupervised access to a vehicle could
result in an accident and/or serious
personal injury.
iOpening a door causes the windows on that
side of the car to open slightly. They will return to
the up position when the door is closed.
iTo unlock the vehicle, the SmartKey with
KEYLESS-GO must be outside the vehicle, no fur-
ther than approximately 3 feet (1 meter) away
from the door to be opened.
Warning!G
When leaving the vehicle, always take the
SmartKey with KEYLESS-GO with you, and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. A child’s unsupervised
access to a vehicle could result in an acci-
dent and/or serious personal injury.
iOpening a door causes the windows on that
side of the car to open slightly. They will return to
the up position when the door is closed.