2007 MERCEDES-BENZ CLK63AMG cooling

371 Practical hints
What to do if …?
ProblemPossible cause/consequenceSuggested solution
•The red coolant warning lamp
comes on when the engine is
running.There is insufficient coolant in the reservoir.Add coolant to prevent engine from
overheating (
page 320).
If this warning lamp comes on frequently,
there is a leak in the cooling system.Have the cooling system checked.
If the coolant level is correct, the electric ra-
diator fan may be broken.If the coolant temperature is below
257 °F (125 °C), you can continue
driving to the nearest authorized
Mercedes-Benz Center.
Avoid high engine loads (e.g. driving
uphill) and stop-and-go driving.
•The red coolant warning lamp
comes on while driving and you
hear a warning sound.The coolant temperature has exceeded
257 °F (125 °C).Stop as soon as possible and allow
the engine and coolant to cool down.
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 open-
ing 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.

390 Practical hints
What to do if …?
Display symbolDisplay messagePossible cause/consequencePossible solution
úVisit workshopThere may be a malfunction in the

fuel injection system

ignition system

exhaust system

fuel system
Have the measuring system checked
by an authorized Mercedes-Benz Cen-
ter.
B Top up coolant
See Operator’s ManualThe coolant level is too low.Add coolant (page 320).
If you have to add coolant frequently,
have the cooling system checked by
an authorized Mercedes-Benz Center.
Warning!G
Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. You could be seriously burned.
!Do not ignore the low engine coolant level
warning. Extended driving with the message and
symbol displayed may cause serious engine
damage not covered by the Mercedes-Benz Lim-
ited Warranty.
Do not drive without sufficient amount of coolant
in the cooling system. The engine will overheat,
causing major engine damage.

392 Practical hints
What to do if …?
During severe operating conditions and
stop-and-go city traffic, the coolant tem-
perature may rise close to 248°F (120°C).
Display symbolDisplay messagePossible cause/consequencePossible solution
Observe the coolant temperature indicator in
the instrument cluster (
page 26).
If the temperature rises again:
Contact an authorized Mercedes-Benz
Center immediately.
•The cooling fan for the coolant is mal-
functioning.Observe the coolant temperature indicator in the
instrument cluster (
page 26).
Have the fan replaced as soon as possible.
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 open-
ing 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.!The engine should not be operated with the
coolant temperature above 248°F (120°C). Do-
ing so may cause serious engine damage which
is not covered by the Mercedes-Benz Limited
Warranty.

473 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 and
headlamp cleaning system*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 479).

477 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 -22°F (-30°C) and
corrosion protection.
If the antifreeze mixture is effective
to -22°F (-30°C), the boiling point of the
coolant in the pressurized cooling system
is reached at approx. 266°F (130°C).The coolant solution must be used
year-round to provide the necessary corro-
sion protection and increase boil-over pro-
tection. Refer to Maintenance Booklet for
replacement 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 (see Facto-
ry Approved Service Products pamphlet)
are used to renew the coolant concentra-
tion or bring it back up to the proper level.
To provide important corrosion protection,
the solution must be at least 45% anticor-
rosion/antifreeze (equivalent to freeze
protection to approx. -22°F [-30°C]). If you
use a solution that is more than 55% anti-
corrosion/antifreeze (freeze protection to
approx. -49°F [-45°C]), the engine temper-
ature will increase due to the lower heat transfer capability of the solution. There-
fore, do not use more than this amount of
anticorrosion/antifreeze.
If the coolant level is low, water and MB
Anticorrosion /Antifreeze should be used
to bring it up to the proper level (have cool-
ing system checked for signs of leakage).
Please make sure the mixture is in accor-
dance with label instructions.
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

481 Index
A
ABS 27, 88
Malfunction indicator lamp 366
Messages in display 380
Accelerator position,
automatic transmission 174
Accessory weight 347
Accident 57
Active head restraints 80
Resetting 424
Air bags 65
Children 82
Front passenger front
air bag off indicator lamp 74
Front, Driver 69
Front, Passenger 69
Head-thorax 70
Occupant Classification System
(OCS) 71
Rear side-impact* 70
Safety guidelines 67
Air conditioning refrigerant 474
Air conditioning system see
Climate control system
Air conditioning, Cooling 196, 208
Air distribution 192, 203Air pressure see
Tires, Inflation pressure
Air recirculation mode 194, 205
Air vents 197, 210
Air volume 192, 204
Alarm system see Anti-theft systems
Alignment bolt (vehicle tool kit) 404, 443
AMG menu (CLK 63 AMG only) 145
Lap analysis 149
Overall analysis 148
RACETIMER 149
Vehicle supply voltage 146
Anticorrosion/antifreeze 477, 478
Antiglare, Rear view mirror 184, 185
Antilock Brake System see ABS
Anti-theft alarm
system indicator lamp 29
Anti-theft systems 95
Anti-theft alarm system 95
Immobilizer 95
Aquaplaning see Hydroplaning
Armrest 278, 279
Ashtrays 280
Aspect ratio 347
ATF 319AUDIO menu 149
CD player (CD, MP3-CD) 150
Radio station 149
Radio station (satellite*) 150
Search function 163
Audio system 211
Button and soft key operation 214
CD changer* 230
CD operation 227
Emergency calls "911" 247
MP3 228
Operating and display elements 212
Operating audio system 211
Operating safety 211
Radio operation 218
Sound system* 211, 215
Switching on/off 214
Telephone* operation 211, 234
Auto-dimming, Rear view mirror 185
Automatic central locking,
Control system 117, 164
Automatic climate control see
Climate control system
Automatic headlamp mode see Headlamps
Automatic lighting control,
Interior lighting 134

483 Index
C
California retail buyers and lessees,
Important notice for 11
Call priority (Tele Aid) 292
Can holder see Cup holder
Capacities and
recommended fuels/lubricants 472
Cargo area see Trunk
Carpets, cleaning 363
Catalytic converter 310
CD changer* 227
MP3 228
CD player 227
Control system 150
Center console 29
Lower part 30
Upper part 29
Central locking
Automatic 117, 164
Locking/unlocking from inside 118
Central locking switch 118
Certification label 462
Certification label, examples 462
Charcoal filter 207Children in the vehicle 82
Air bags 82
Blocking rear
side window operation 86
Front passenger front
air bag off indicator lamp 74
Infant and
child restraint systems 75, 82
LATCH-type child seat anchors 85
Occupant Classification System
(OCS) 71
Cigarette lighter 282
Climate control see
Climate control system
Climate control system
Air conditioning refrigerant 474
Air conditioning, Cooling 196, 208
Air distribution 192, 203
Air recirculation mode 194, 205
Air vents 197, 210
Air volume 192, 193, 204
Charcoal filter 207
Control panel,
Automatic climate control 199Control panel, Climate control 189
Deactivating/Reactivating 191, 201
Defogging 204
Defrosting 204
Defrosting, Rear window 187
Front defroster 193
MAXCOOL 205
Residual engine heat
and ventilation* (REST*) 209
Temperature 192, 202
Clock 27, 138, 158
Setting time 158
Cockpit 24
Cold tire inflation pressure 347
Collapsible wheel chock 404, 407
COMAND* see separate
COMAND operating instructions
Combination switch 54, 130
Control system 139
Functions 143
Multifunction display 139
Multifunction steering wheel 140
Resetting to factory default 153

491 Index
Loading the vehicle 326
Locator lighting 129, 161
Lock buttons
Door handle (KEYLESS-GO*) 62, 105
Trunk lid (KEYLESS-GO*) 106
Locking 62
Loss of keys 107
Loss of Service and
Warranty Information Booklet 461
Low beam headlamps
Indicator lamp 27
Messages in display 398
Replacing bulbs (Bi-Xenon*) 428
Replacing bulbs (Halogen) 428, 430
Switching on 54
Lubricants 472
Luggage cover 260
Folding back 271M
Maintenance 12, 353
Calling up service indicator 355
Clearing service indicator 354
Maintenance System 353
Resetting service indicator 355
Service indicator 353
Service term exceeded 354
Maintenance system 353
Manual headlamp mode see Headlamps
Manual shift program
Deactivating 183
Manual shift program CLK 63 AMG 181
MAXCOOL maximum cooling 205
Maximum load rating, Tires 348
Maximum loaded vehicle weight,
Tire inflation pressure 348
Maximum tire inflation pressure 348
Mechanical key 410
Memory function see Seats, Power
Menus see Control system menus
Microphone, Hands-free 31
Minispare wheel see Spare wheelMirrors
Adjusting 45
Antiglare position 184
Auto-dimming 185
Exterior rear view mirrors 45
Interior rear view mirror 45
Mobile phone see Telephone*
MOE tires* see MOExtended system*
MOE* see MOExtended system*
MOExtended system* 446
MOExtended tires* 466
MON 313
MP3 228
Multicontour seat* see
Seats, Multicontour*
Multifunction display 139
Changing settings see
Control system menus and
Control system submenus
Selecting language 156
Symbol messages 388–403
Text messages 380–386