2006 MERCEDES-BENZ CLK500 cooling

399 Practical hints
What to do if …?
Display symbol
Display message
Possible cause/consequence
Possible solution
•
Coolant
Stop, engine off
The poly-V-belt could be broken.

Stop the vehicle in a safe location or as soon
as it is safe to do so and immediately turn off
the engine.

Check the poly-V-belt.
If it is broken:

Do not continue to drive. Otherwise the en-
gine will overheat due to an inoperative water
pump which may result in damage to the en-
gine. Notify an authorized Mercedes-Benz
Center.
If it is intact:

Do not continue to drive the vehicle with this
message displayed. Doing so could result in
serious engine damage that is not covered by
the Mercedes-Benz Limited Warranty.

Drive immediately to the nearest authorized
Mercedes-Benz Center.
Coolant
Visit workshop
The cooling fan for the coolant is mal-
functioning.

Observe the coolant temperature display.

Have the fan replaced as soon as possible.

480 Technical dataFuels, coolants, lubricants, etc.
Model
Capacity
Fuels, coolants, lubricants, etc.
Cooling system
CLK 350
CLK 500
CLK 55 AMG
approx. 7.5 US qt (7.1 l)
approx. 12.8 US qt (12.0 l)
approx. 12.8 US qt (12.0 l)
MB 325.0 Anticorrosion/Antifreeze
Agent
Fuel tank
including a reserve of
CLK 350
CLK 500
CLK 55 AMG
16.35 US gal (62.0 l)
2.11 US gal (8.0 l)
2.11 US gal (8.0 l)
2.64 US gal (10.0 l)
Premium unleaded gasoline:
Minimum Posted Octane 91
(Avg. of 96 RON / 86 MON)
Air conditioning system
R-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 Concentrate
1
1Use MB Windshield Washer Concentrate “S” and water for temperatures above freezing point or MB Windshield Washer Concentrate “S” and commercially available
premixed windshield washer solvent / antifreeze for temperatures below freezing point. Follow suggested mixing ratios (page 486).

484 Technical dataFuels, 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.

493 Index
A
ABS 25, 87, 487
Malfunction indicator lamp 374
Messages in display 385
Accelerator position,
automatic transmission 170
Accessory weight 355
Accident 56
Active head restraints 73
Resetting 434
Air bags 63
Children 64
Front passenger
front air bag off indicator lamp 81
Front, Driver 67
Front, Passenger 67
Head-thorax 68
Occupant Classification System
(OCS) 78
Rear side-impact 68
Safety guidlines 66
Air conditioning refrigerant 481
Air conditioning system see
Climate control systemAir conditioning, Cooling 194, 206
Air distribution 190, 200
Air pressure see Tires, Inflation pressure
Air recirculation mode 192, 203
Air vents 195, 208
Air volume 190, 201
Alarm system see Anti-theft systems
Alignment bolt
(vehicle tool kit) 413, 449, 487
Anticorrosion/antifreeze 484, 485
Antiglare, Rear view mirror 181, 182
Antilock Brake System see ABS
Anti-theft systems 92
Anti-theft alarm system 92
Immobilizer 92
Tow-away alarm 94
Aquaplaning see Hydroplaning
Armrest 281, 282, 283
Storage box 279
Ashtrays 284
Aspect ratio 355
ATF 326
AUDIO menu 145Audio system 209
Button and soft key operation 212
CD changer* 229
CD operation 227
Emergency calls "911" 247
Operating and display elements 210
Operating audio system 209
Operating safety 209
Radio operation 217
Sound system* 209, 214
Switching on/off 212
Telephone* operation 209, 233
Auto-dimming, Rear view mirror 182
Automatic central locking,
Control system 117, 159
Automatic climate control see
Climate control system
Automatic headlamp mode see Headlamps
Automatic lighting control,
Interior lighting 134
Automatic locking when driving 117
Automatic shift program 172

495 Index
Carpets, cleaning 371
Catalytic converter 316
CD changer* 227
CD player 146, 227
Center console 27
Lower part 28
Upper part 27
Central locking
Automatic 117, 159
Locking/unlocking from inside 118
Central locking switch 118
Certification label 468
Charcoal filter 204
Children in the vehicle 75
Air bags 64
Blocking rear
side window operation 85
Front passenger front
air bag off indicator lamp 81
Infant and
child restraint systems 69, 75
LATCH-type child seat anchors 83
LATCH-type
child seat anchors design A 84
LATCH-type
child seat anchors design B 84Occupant Classification System
(OCS) 78
Cigarette lighter 286
Climate control see
climate control system 186
Climate control system
Air conditioning refrigerant 481
Air conditioning, Cooling 194, 206
Air distribution 190, 200
Air recirculation mode 192, 203
Air vents 195, 208
Air volume 190, 191, 201
Charcoal filter 204
Control panel,
Automatic climate control 197
Control panel, Climate control 187
Deactivating/Reactivating 189, 199
Defogging 202
Defrosting 201
Defrosting, Rear window 185
Front defroster 191
MAXCOOL 202
Residual engine heat
and ventilation* (REST*) 207
REST* 490
Temperature 190, 200Clock 25, 153, 154
Setting time 153, 154
Cockpit 22, 487
Cockpit Management and Data System
see COMAND*
Cold tire inflation pressure 355
Collapsible wheel chock 413, 416
COMAND* 487
COMAND* see separate
COMAND operating instructions
Combination switch 52, 131
Control system 139, 487
Functions 143
Multifunction display 140
Multifunction steering wheel 140
Resetting to factory default 148
Control system menus 142, 143, 489
AUDIO 145
NAV* 146
Settings 148
Settings, Submenus 149
Standard display 144
Submenus 141
TEL* 163
Trip computer 161
Vehicle status message memory 146

502 Index
Fuel reserve 25, 379
High beam headlamp 25
Instrument cluster 374–380
Low beam headlamp 25
Maintenance service 361
Parktronic system*
warning indicators 271
Roll bar 379
Seat belt telltale 25, 71, 379
Seat belts 379
SRS 25, 63, 380
Turn signals 25
Language, Setting 151
LATCH-type child seat anchors see
Children in the vehicle
License plate lamps
Messages in display 405
Replacing bulbs 439, 443
Light alloy wheels, cleaning 370
Light sensor see Lamp sensor
Lighter see Cigarette lighter
Lighting, Exterior and interior 127
Limp Home Mode 180
Loading
Ski sack* (Canada only) 273
Loading see Vehicle loadingLoading the vehicle 333
Locator lighting 129, 157
Lock buttons
Door handle (KEYLESS-GO*) 60, 104
Trunk lid (KEYLESS-GO*) 106
Lock knob 489
Locking 60
Loss of keys 100, 106
Loss of Service and
Warranty Information Booklet 467
Low beam headlamps
Indicator lamp 25
Messages in display 406
Replacing bulbs (Bi-Xenon*) 438
Replacing bulbs (Halogen) 438, 440
Switching on 52
Lubricants 479
Luggage cover 262
Folding back 273
M
Maintenance 12, 361
Calling up service indicator 362
Clearing service indicator 362
FSS (Canada vehicles) 361
Maintenance System
(U.S. vehicles) 361Resetting service indicator 363
Service indicator 361
Service term exceeded 362
Maintenance system
(U.S. vehicles) 361, 489
Manual headlamp mode see Headlamps
Manual shift program 178
MAXCOOL maximum cooling 202
Maximum load rating, Tires 356
Maximum loaded vehicle weight,
Tire inflation pressure 356
Maximum tire inflation pressure 356
Mechanical key 419
Memory function see Seats, Power
Menus see Control system menus
Microphone, Hands-free 29
Minispare wheel see Spare wheel
Mirrors
Adjusting 43
Antiglare position 181
Auto-dimming 182
Exterior rear view mirrors 43
Parking position 126, 161, 183
Interior rear view mirror 43
MOE see MOExtended
MOE tires see MOExtended system*