MERCEDES-BENZ CLK550 2008 C209 Owner's Manual

490 Technical data
Fuels, coolants, lubricants, etc.
ModelCapacityFuels, coolants, lubricants, etc.
Power steeringCLK 350
CLK 550
CLK 63 AMGapprox. 1.1 US qt (1.0 l)
approx. 1.1 US qt (1.0 l)
approx. 1.3 US qt (1.2 l)MB Power Steering Fluid
(Pentosin CHF 11S)
Front wheel hubsCLK 350
CLK 550
CLK 63 AMGapprox. 3.0 oz (85 g) each
approx. 3.0 oz (85 g) each
approx. 2.5 oz (70 g) eachHigh temperature roller bearing grease
Brake system0.64 US qt (0.6 l)MB Brake Fluid (DOT 4+)
Cooling systemCLK 350
CLK 550
CLK 63 AMGapprox. 7.8 US qt (7.4 l)
approx. 9.7 US qt (9.2 l)
approx. 11.5 US qt (10.9 l)MB 325.0 Anticorrosion/Antifreeze
Agent
Fuel tank
including a reserve of
CLK 350
CLK 550
CLK 63 AMG
16.35 US gal (62.0 l)
2.11 US gal (8.0 l)
2.11 US gal (8.0 l)
3.17 US gal (12.0 l)Premium unleaded gasoline:
Minimum Posted Octane 91
(Avg. of 96 RON / 86 MON)
Air conditioning systemR-134a refrigerant and special PAG lu-
bricant oil (never R-12)
Windshield washer system
Heated windshield washer system and
headlamp cleaning system*3.2 US qt (3.0 l)
6.4 US qt (6.0 l)MB Windshield Washer Concentrate1
1Use MB Windshield Washer Concentrate “MB SummerFit” and water for temperatures above freezing point or MB Windshield Washer Concentrate “MB SummerFit”
and commercially available premixed windshield washer solvent / antifreeze for temperatures below freezing point. Follow suggested mixing ratios (page 496).

491 Technical data
Fuels, coolants, lubricants, etc.
Engine oils
Engine oils are specifically tested for their
suitability in our engines and durability for
our service intervals. Therefore, only use
approved engine oils and oil filters
required for vehicles with Maintenance
System.
For a listing of approved engine oils and oil
filters, refer to the Factory Approved
Service Products pamphlet (USA only), or
contact an authorized Mercedes-Benz
Center.Engine oil additives
Air conditioning refrigerant
R-134a (HFC) refrigerant and special PAG
lubricating oil are used in the air
conditioning system.
Brake fluid
Only brake fluid approved by
Mercedes-Benz is recommended. Any
authorized Mercedes-Benz Center will
provide you with additional information.
!Using engine oils and oil filters of specifica-
tion other than those expressly required for the
Maintenance System, or changing of oil and oil
filter at change intervals longer than those called
for by the Maintenance System will result in
engine or emission control system damage not
covered by the Mercedes-Benz Limited
Warranty.
Please follow Maintenance System
recommendations for scheduled oil changes.
Failure to do so will result in engine or emission
control system damage not covered by the
Mercedes-Benz Limited Warranty.
!Do not blend oil additives with engine oil.
They may damage the engine.
Damage or malfunctions resulting from blending
oil additives are not covered by the
Mercedes-Benz Limited Warranty.
!Never use R-12 (CFC) or mineral-based
lubricating oil. Otherwise damage to the system
will occur.
Warning!G
During vehicle operation, the boiling point of
the brake fluid is continuously reduced
through the absorption of moisture from the
atmosphere.
Under extremely strenuous operating condi-
tions, this moisture content can lead to the
formation of bubbles in the system, thus
reducing the system’s efficiency.
Therefore, the brake fluid must be replaced
regularly. Refer to your vehicle's Mainte-
nance Booklet for replacement interval.

492 Technical data
Fuels, coolants, lubricants, etc.
Premium unleaded gasolineFuel requirements
Only use premium unleaded fuel:

The octane number (posted at the
pump) must be 91 min. It is an average
of both the Research Octane Number
(RON) and the Motor Octane Number
(MON): (RON+MON)/2. This is also
known as the ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates
such as ethanol, IPA, IBA and TBA can be
used provided the ratio of any one of these
oxygenates to gasoline does not
exceed 10%; MTBE not to exceed 15%.
The ratio of methanol to gasoline must not
exceed 3% plus additional co-solvents.
Using mixtures of ethanol and methanol is
not allowed. Gasohol, which contains
10% ethanol and 90% unleaded gasoline,
can be used.
These blends must also meet all other fuel
requirements, such as resistance to spark
knock, boiling range, vapor pressure, etc.Warning!G
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flame or smoking mate-
rials near gasoline!
Turn off the engine before refueling
Whenever you are around gasoline, avoid in-
haling fumes and skin or clothing contact,
extinguish all smoking materials.
Direct skin contact with fuels and the inha-
lation of fuel vapors can damage your
health.
!To maintain the engine’s durability and per-
formance, premium unleaded gasoline must be
used. If premium unleaded gasoline is not avail-
able and low octane fuel is used, follow these
precautions:

Have the fuel tank only partially filled with
unleaded regular gasoline and fill up with
premium unleaded gasoline as soon as
possible.

Avoid full throttle driving and abrupt
acceleration.

Do not exceed an engine speed of 3 000 rpm
if the vehicle is loaded with a light load such
as two persons and no luggage.

Do not exceed 2/3 of maximum accelerator
pedal position if the vehicle is fully loaded or
operating in mountainous terrain.

493 Technical data
Fuels, coolants, lubricants, etc.
Gasoline additives
A major concern among engine manufac-
turers is carbon build-up caused by gaso-
line. Mercedes-Benz recommends only the
use of quality gasoline containing additives
that prevent the build-up of carbon
deposits.
After an extended period of using fuels
without such additives, carbon deposits
can build up especially on the intake valves
and in the combustion area, leading to
engine performance problems such as:

Warm-up hesitation

Unstable idle

Knocking/pinging

Misfire

Power lossIn areas where carbon deposits may be
encountered due to lack of availability of
gasolines which contain these additives,
Mercedes-Benz recommends the use of
additives approved by us for use on
Mercedes-Benz vehicles.
Refer to Factory Approved Service
Products pamphlet (USA only), or contact
an authorized Mercedes-Benz Center for a
listing of approved product(s). Follow
directions on product label.
!Do not blend other fuel additives with fuel.
This only results in unnecessary cost and may be
harmful to the engine operation.
Damage or malfunction resulting from poor fuel
quality or from blending additional fuel additives
other than those tested and approved by us for
use on Mercedes-Benz vehicles are not covered
by the Mercedes-Benz Limited Warranty.

494 Technical data
Fuels, coolants, lubricants, etc.
Coolants
The engine coolant is a mixture of water
and anticorrosion / antifreeze, which
provides:

Corrosion protection

Freeze protection

Boiling protection (by increasing the
boiling point)
The cooling system was filled at the factory
with a coolant providing freeze protection
to approximately -35°F (-37°C) and
corrosion protection.
If the antifreeze mixture is effective
to -35°F (-37°C), the boiling point of the
coolant in the pressurized cooling system
is reached at
approximately 266°F (130°C).The coolant solution must be used year
round to provide the necessary corrosion
protection and increase boil-over protec-
tion. Refer to Maintenance Booklet for re-
placement interval.
Coolant system design and coolant used
determine the replacement interval. The
replacement interval published in the
Maintenance Booklet is only applicable if
MB 325.0 Anticorrosion/Antifreeze solu-
tion or other Mercedes-Benz approved
products of equal specification are used to
renew the coolant concentration or bring it
back up to the proper level.
For information on other Mercedes-Benz
approved products of equal specification,
refer to the Factory Approved Service
Products pamphlet (USA only) or contact
an authorized Mercedes-Benz Center.To provide important corrosion protection,
the solution must be at least 50% anticor-
rosion/antifreeze (equivalent to freeze
protection to approximately -35°F
[-37°C]). If you use a solution that is more
than 55% anticorrosion/antifreeze (freeze
protection to approximately -49°F
[-45°C]), the engine temperature will in-
crease due to the lower heat transfer capa-
bility of the solution. Therefore, do not use
more than this amount of anticorro-
sion/antifreeze.
If the coolant level is low, water and
MB 325.0 Anticorrosion /Antifreeze
should be used to bring it up to the proper
level (have cooling system checked for
signs of leakage). Please make sure the
mixture is in accordance with label instruc-
tions.
The water in the cooling system must meet
minimum requirements, which are usually
satisfied by normal drinking water. If you
are not sure about the water quality,
consult an authorized Mercedes-Benz
Center.
!Add premixed coolant solution only. Adding
water and MB 325.0 Anticorrosion/Antifreeze
separately from each other, could cause engine
damage not covered by the Mercedes-Benz
Limited Warranty

495 Technical data
Fuels, coolants, lubricants, etc.
Anticorrosion/antifreeze
Your vehicle contains a number of alumi-
num parts. The use of aluminum compo-
nents in motor vehicle engines
necessitates that anticorrosion/antifreeze
coolant used in such engines be specifical-
ly formulated to protect the aluminum parts. Failure to use such anticorro-
sion/antifreeze coolant will result in a sig-
nificantly shortened service life.
Therefore, the following product is strongly
recommended for use in your vehicle:
MB 325.0 Anticorrosion/Antifreeze agent.Before the start of the winter season (or
once a year in hot southern regions), you
should have the anticorrosion/antifreeze
concentration checked. The coolant is also
regularly checked each time you bring your
vehicle to an authorized Mercedes-Benz
Center for service.
Anticorrosion/antifreeze quantity
ModelApproximate freeze protection
–35°F (–37°C)–49°F (–45°C)
CLK 3503.9 US qt (3.7 l)4.3 US qt (4.1 l)
CLK 5504.9 US qt (4.6 l)5.3 US qt (5.1 l)
CLK 63 AMG5.8 US qt (5.5 l)6.3 US qt (6.0 l)

496 Technical data
Fuels, coolants, lubricants, etc.
Windshield washer system and
headlamp cleaning system*
Both the windshield washer system and
headlamp cleaning system are supplied
from the windshield washer reservoir.
The windshield washer reservoir has a
capacity of approximately:

3.2 US qt (3.0 l) in vehicles with wind-
shield washer system

6.4 US qt (6.0 l) in vehicles with heated
windshield washer system* and head-
lamp cleaning system*.
Refill the reservoir with MB Windshield
Washer Concentrate “MB SummerFit”
and water (or concentrate and com-
mercially available premixed wind-
shield washer solvent / antifreeze,
depending on ambient temperatures).Windshield and headlamp washer fluid
mixing ratio
For temperatures above freezing point, use
MB Windshield Washer Concentrate
“MB SummerFit” and water:

1 part “MB SummerFit” to 100 parts
water
(1.34 fl oz [40 ml] “MB SummerFit” to
1gal [4.0l] water)
For temperatures below freezing point, use
MB Windshield Washer Concentrate
“MB SummerFit” and commercially avail-
able premixed windshield washer
solvent / antifreeze:

1 part “MB SummerFit” to 100 parts
solvent
(1.34 fl oz [40 ml] “MB SummerFit” to
1 gal [4.0 l] solvent)
Warning!G
Washer solvent/antifreeze is highly flam-
mable. Do not spill washer
solvent/antifreeze on hot engine parts, be-
cause it may ignite and burn. You could be
seriously burned.

497 Index
A
ABS 29, 90
Malfunction indicator lamp 378
Messages in display 394
Accelerator position,
automatic transmission 176
Accessory weight 358
Accident 58
Active head restraints 81
Resetting 440
Air bags 65
Children 83
Front passenger front
air bag off indicator lamp 76
Front side impact air bags 70
Front, Driver 70
Front, Passenger 70
Head-thorax 71
Occupant Classification System
(OCS) 72
Rear side impact air bags* 70
Rear side-impact* 72
Safety guidelines 68
Window curtain 70
Air conditioning refrigerant 491Air conditioning system
see Climate control system
Air conditioning, Cooling 198, 210
Air distribution 194, 205
Air pressure see Tires, Inflation pressure
Air recirculation mode 196, 207
Air vents 199, 212
Air volume 194, 206
Alarm system see Anti-theft systems
Alignment bolt
(vehicle tool kit) 422, 460, 461
AMG menu (CLK 63 AMG only) 148
Lap analysis 151
Overall analysis 150
RACETIMER 149
Vehicle supply voltage 148
Anticorrosion/antifreeze 494, 495
Antiglare, Rear view mirror 185, 186
Antilock Brake System see ABS
Anti-theft systems 97
Anti-theft alarm system 97
Immobilizer 97
Aquaplaning see Hydroplaning
Armrest 287
Ashtrays 289
Aspect ratio 358ATF 327
AUDIO menu 151
CD player (CD, MP3-CD) 152
Radio station 151
Radio station (satellite*) 152
Search function 165
Audio system 213
Button and soft key operation 216
CD changer* 232
CD operation 229
Emergency calls "911" 248
MP3 230
Operating and display elements 214
Operating audio system 213
Operating safety 213
Radio operation 221
Sound system* 213, 217
Switching on/off 216
Telephone* operation 213, 236
Auto-dimming, Rear view mirror 186
Automatic central locking,
Control system 118, 166
Automatic climate control
see Climate control system
Automatic headlamp mode see Headlamps

498 Index
Automatic lighting control,
Interior lighting 136
Automatic locking when driving 118
Automatic shift program 178
Automatic transmission
Accelerator position 176
Automatic shift program 178
Emergency operation
(limp-home mode) 184
Gear ranges 177
Gear selector lever 51, 172
Gear selector lever control
one-touch gearshifting 179
Gear selector lever positions 174
Gear shifting malfunctions 184
Kickdown 176
Kickdown, manual shift program 184
Manual shift program
CLK 63 AMG 182
Program mode selector switch 178
Shifting procedure 173
Starting engine 51
Steering wheel gearshift control
one-touch gearshifting* 180
Transmission fluid level 327
Automatic Transmission Fluid see ATFB
Backrest 281
Seat, Multicontour* 124
Seat, Power 42
Backup lamps
Messages in display 414
Replacing bulbs 443, 444
Bar 358
BAS 92
Batteries, SmartKey
Changing 442
Checking battery condition 108
Battery, Vehicle 329, 464
Charging 466
Connecting 466
Disconnecting 465
Installing 466
Jump starting 467
Messages in display 403
Removing 465
Bead 358
Beverage holder see Cup holder
Block heater (Canada only) 363
Bolts, Spare wheel 426Brake fluid 491
Checking 322
Message in display 404
Brake lamp
Cleaning lenses 372
High mounted 444
Replacing bulbs 444, 448
Brake pads
Message in display 404
Brakes 310
High-performance brake system
(CLK 63 AMG only) 311
Warning lamp 380
Break-in period 308
Bulbs, replacing see Replacing bulbs

499 Index
C
California retail buyers and
lessees, Important notice for 11
Call priority (Tele Aid) 300
Can holder see Cup holder
Capacities and
recommended fuels/lubricants 489
Cargo area see Trunk
Cargo tie-down rings 284
Carpets, cleaning 375
Catalytic converter 318
CD changer* 229
MP3 230
CD player 229
Control system 152
Center console 31
Lower part 32
Upper part 31
Central locking
Automatic 118, 166
Locking/unlocking from inside 119
Central locking switch 119
Certification label 478
Certification label, examples 478
Charcoal filter 209Checking tire pressure electronically
Tire Pressure Monitoring System
(TPMS), (USA only) 344
Children in the vehicle 83
Air bags 83
Blocking
rear side window operation 88
Front passenger front
air bag off indicator lamp 76
Infant and
child restraint systems 77, 83, 86
LATCH-type child seat anchors 87
Occupant Classification System
(OCS) 72
Cigarette lighter 290
Climate control
see Climate control system
Climate control system
Air conditioning refrigerant 491
Air conditioning, Cooling 198, 210
Air distribution 194, 205
Air recirculation mode 196, 207
Air vents 199, 212
Air volume 194, 195, 206
Charcoal filter 209Control panel,
Automatic climate control 201
Deactivating/Reactivating 193, 203
Defogging 206
Defrosting 206
Defrosting, rear window 189
Front defroster 195
MAXCOOL 207
Residual engine heat
and ventilation* (REST*) 211
Temperature 194, 204
Clock 29, 140, 160
Setting time 160
Cockpit 26
Cold tire inflation pressure 358
Collapsible wheel chock 422, 424
COMAND* see separate
COMAND operating instructions
Combination switch 55, 133
Control system 141
Functions 143, 145
Multifunction display 141
Multifunction steering wheel 142
Resetting to factory default 155