engine coolant MERCEDES-BENZ CLK550 2008 C209 Owner's Manual

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

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
<Seat belt telltale79,
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

58 Getting started
Driving
Problems while driving
The engine runs erratically and misfires

An ignition cable may be damaged.

The engine electronics may not be op-
erating properly.

Unburned gasoline may have entered
the catalytic converter and damaged it.
Give very little gas.
Have the problem repaired at an autho-
rized Mercedes-Benz Center as soon as
possible.
The coolant temperature is
above 248°F (120°C)
The coolant is too hot and is no longer
cooling the engine.
Stop the vehicle in a safe location as
soon as possible and turn off the
engine. Allow engine and coolant to
cool off.
Check the coolant level and add
coolant if necessary (
page 328).
In case of accident
If the vehicle is leaking gasoline:
Do not start the engine under any
circumstances.
Notify local fire and/or police
authorities.
If the extent of the damage cannot be
determined:
Contact an authorized Mercedes-Benz
Center or call Roadside Assistance.
If no damage can be determined on the

major assemblies

fuel system

engine mount:
Start the engine in the usual manner.
!If anything blocks the windshield wipers
(leaves, snow, etc.), switch them off
immediately.

For safety reasons, stop the vehicle in a safe
location and,

remove SmartKey from starter switch
or

turn off the engine by pressing the
KEYLESS-GO* start/stop button and
open the driver’s door (with the driver’s
door open, starter switch is in position 0,
same as with SmartKey removed from
starter switch)
before attempting to remove any blockage.

Remove blockage.

Turn the windshield wipers on again.
If the windshield wipers fail to function at all with
the combination switch in positionI,

set the combination switch to the next high-
er wiper speed

have the windshield wipers checked at the
nearest authorized Mercedes-Benz Center.


139 Controls in detail
Instrument cluster
Coolant temperature indicator
The coolant temperature indicator is on
the right side in the instrument cluster
(
page 28).
Resetting trip odometer
Make sure you are viewing the stan-
dard display in the multifunction dis-
play (
page 147).
If it is not displayed, press buttonè
orÿ on the multifunction steering
wheel repeatedly until the standard dis-
play appears (
page 142).
Press and hold the reset button on the
instrument cluster (
page 138) until
the trip odometer is reset.
Warning!G

Driving when your engine is overheated
can cause some fluids which may have
leaked into the engine compartment to
catch fire. You could be seriously
burned.

Steam from an overheated engine can
cause serious burns which can occur
just by opening the hood. Stay away
f r o m t h e e n g i n e i f y o u s e e o r h e a r s t e a m
coming from it.
Stop the vehicle in a safe location away from
other traffic. Turn off the engine, get out of
the vehicle and do not stand near the vehicle
until the engine has cooled down.
!Excessive coolant temperature triggers a
warning in the multifunction display
(
page 406) and the red coolant warning lamp
in the instrument cluster comes on
(
page 383).
The engine should not be operated with the cool-
ant temperature above 248°F (120°C). Doing so
may cause serious engine damage which is not
covered by the Mercedes-Benz Limited
Warranty.
iDuring severe operating conditions, e.g.
stop-and-go traffic, the coolant temperature may
rise close to 248°F (120°C).

211 Controls in detail
Automatic climate control
Residual heat and ventilation*
(Canada only)
With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes. This feature makes
use of the residual heat produced by the
engine.ActivatingSwitch off the ignition (page 40).
Press button9 (page 201).
The indicator lamp on the button
comes on.Deactivating
Press button9 (page 201).
The indicator lamp on the button goes
out.
The residual heat is automatically turned
off:

when the ignition is switched on

after about 30 minutes

if the battery voltage drops
iHow long the system will provide heating
depends on

the coolant temperature

the temperature set by the operator
The blower will run at speed setting 1 regardless
of the air distribution control setting.

319 Operation
Driving instructions
Engine adjustments should not be altered
in any way. Moreover, the specified service
jobs must be carried out regularly accord-
ing to Mercedes-Benz servicing require-
ments. For details refer to the
Maintenance Booklet.Coolant temperature
During severe operating conditions and
stop-and-go city traffic, the coolant
temperature may rise close to
approximately 248°F (120°C).
The engine should not be operated with
the coolant temperature over 248°F
(120°C). Doing so may cause serious
engine damage which is not covered by the
Mercedes-Benz Limited Warranty.
Warning!G
Inhalation of exhaust gas is hazardous to
your health. All exhaust gas contains carbon
monoxide (CO), and inhaling it can cause un-
consciousness and lead to death.
Do not run the engine in confined areas
(such as a garage) which are not properly
ventilated. If you think that exhaust gas
fumes are entering the vehicle while driving,
have the cause determined and corrected
immediately. If you must drive under these
conditions, drive with at least one window
fully open at all times.
Warning!G

Driving when your engine is overheated
can cause some fluids, which may have
leaked into the engine compartment, to
catch fire. You could be seriously
burned.

Steam from an overheated engine can
cause serious burns which can occur
just by opening the hood. Stay away
from the engine if you see or hear steam
coming from it.
Turn off the engine, get out of the vehicle
and do not stand near the vehicle until the
engine has cooled down.

322 Operation
At the gas station
Check regularly and before a long trip
Engine compartment (CLK 550, example)
1Coolant level
2Brake fluid (fuse box cover removed)
3Windshield washer and headlamp
cleaning system*Coolant
For normal replenishing, use water (pota-
ble water quality). For more information,
see “Coolant” (
page 328) and see “Fu-
els, coolants, lubricants, etc.”
(
page 489).
Brake fluid
Removing fuse box cover,
see (
page 473).Windshield washer and headlamp
cleaning system*
For more information on filling up the
washer reservoir, see “Windshield washer
system and headlamp cleaning system*”
(
page 330).
Engine oil level
For more information on engine oil, see
“Engine oil” (
page 325).
Vehicle lighting
Check function and cleanliness. For more
information on replacing light bulbs, see
“Replacing bulbs” (
page 443).
For more information, see “Exterior lamp
switch” (
page 55).
Tire inflation pressure
For more information, see “Checking tire
inflation pressure” (
page 341).
iOpening the hood, see (page 323).
!If you find that the brake fluid in the brake
fluid reservoir has fallen to the minimum mark or
below, have the brake system checked for brake
pad thickness and leaks immediately. Notify an
authorized Mercedes-Benz Center immediately.
Do not add brake fluid as this will not solve the
problem. For more information, see also “Practi-
cal hints” (
page 380).