2003 MERCEDES-BENZ CLK55AMG COUPE cooling

289 Practical hints
What to do if …?
Display
Possible cause
Suggested solution
F
Key
do not forget key
This display appears (for a maximum of
60 seconds) if the driver’s door is opened
with the engine shut off and no key in the
starter switch.
Message is only a reminder.

Insert key in the starter switch.

Take the SmartKey with KEY-
LESS-GO* with you when leaving the
vehicle.
B
Coolant
Check level
The coolant level is too low.

Add coolant (
page 256).

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 can 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 Limited
Warranty.
Do not drive without sufficient amount
of coolant in the cooling system. The
engine will overheat, causing major en-
gine damage.

291 Practical hints
What to do if …?
Display
Possible cause
Suggested solution
Ï
Coolant
Stop, engine off!
The poly-V-belt could be broken.

Stop immediately and check the
poly-V-belt.
If it is broken:

Do not continue to drive. Otherwise
the engine will overheat due to an in-
operative water pump which may re-
sult in damage to the engine. 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.
Ï
Coolant
Visit workshop
The cooling fan for the coolant is malfunc-
tioning.

Observe the coolant temperature dis-
play.

Have the fan replaced as soon as pos-
sible.

352 Technical dataFuels, coolants, lubricants, etc.
Model
Capacity
Fuels, coolants, lubricants, etc.
Cooling system
CLK 320
CLK 500
CLK 55 AMG
approx. 10.7 US qt (10 l)
approx. 12.8 US qt (12 l)
approx. 12.8 US qt (12 l)
MB 325.0 Anticorrosion/Antifreeze
Agent
Fuel tank
including a reserve of
16.35 US gal (62.0 l)
2.11 US gal (8.0 l)
Premium unleaded gasoline:
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 l)
MB Windshield Washer Concentrate
1
1Use MB Windshield Washer Concentrate “S” and water for temperatures above freezing or MB Windshield Washer Concentrate “S” and commercially available pre-
mixed windshield washer solvent / antifreeze for temperatures below freezing. Follow suggested mixing ratios (
page 357).

355 Technical data
Fuels, coolants, lubricants, etc.
Damage or malfunctions resulting from
poor fuel quality or from blending specific
fuel additives are not covered by the
Mercedes-Benz Limited Warranty.Coolants
The engine coolant is a mixture of water
and anticorrosion / antifreeze, which pro-
vides:

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 corro-
sion protection.
If the antifreeze mixture is effective to
-22°F (-30°C), the boiling point of the cool-
ant in the pressurized cooling system is
reached at approximately 266°F (130°C).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%
anticorrosion/antifreeze (freeze protec-
tion to approx. - 49°F [-45°C]), the engine
temperature will increase due to the lower
heat transfer capability of the solution.
Therefore, 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 that the mixture is in ac-
cordance 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, con-
sult your authorized Mercedes-Benz
Center.
The coolant solution must be used year
round to provide the necessary corrosion
protection and increase boil-over protec-
tion. You should have it replaced every 15
years or 150 000 miles (250 000 km),
whichever comes first.
Coolant system design and coolant used
stipulate the replacement interval. The
above replacement interval is only applica-
ble if MB 325.0 anticorrosion/antifreeze
solution 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.

367 Index
A
ABS 23, 74, 361
ABS control 75
Malfunction indicator lamp 277
Messages in display 284
Warning lamp 277
Accelerator position, automatic transmis-
sion 146
Accident
In case of 49
Activating
Air conditioning (cooling) 163
Air recirculation mode 160
Anti-theft alarm system 80
Automatic climate control 155
Central locking (control system) 133
Charcoal filter 161
Distance warning function* 205
Distronic* 201
Easy-entry/exit feature 133
ESP 78
Exterior headlamps 46
Exterior lamps 106
Front and rear fog lamp 106
Hazard warning flasher 108
Headlamps 46High beams 108
Ignition 31
Ignition with KEYLESS-GO* start/stop
button 33
Immobilizer 51, 79
Rear window defroster 162
Residual heat 163
Seat heater* 101
Tow-away alarm 81
Windshield wipers 48
Activating steering wheel gearshift control
147
Downshifting 148
Upshifting 147
Adding
Coolant 257
Engine oil 255
Additional turn signals 317
Adjustable air vents, rear passenger com-
partment 164Adjusting 34
Air distribution 158
Air volume 159
Backrest tilt 36
Exterior rear view mirror 38
Head restraint height 36
Head restraint tilt 36
Inside rear view mirror 38
Instrument cluster illumination 111
Mirrors 38
Multicontour seat* 100
Seat cushion depth 100
Seat cushion tilt 36
Seat fore and aft adjustment 35
Seat height 35
Seats 34
Steering column height 38
Steering column length 38
Steering wheel 37
Air conditioning (cooling)
Turning off 163
Turning on 163
Air conditioning refrigerant 353
Air distribution
Adjusting 158

372 IndexCombination switch 107
High beam flasher 47, 108
Turn signals 47
Windshield wipers 47
Consumer information 358
Control and operation of radio transmitters
248
Control system 114, 362
AUDIO menu 119
Convenience submenu 133
Display digital speedometer 119
Distronic* menu 121
Functions 115, 118
Instrument cluster submenu 126, 128
Lighting submenu 129
Malfunction memory menu 122
Menus 117, 118, 364
Multifunction display 114
Multifunction steering wheel 115
NAVI menu 121
Selecting radio system 120
Settings menu 123
Standard display menu 119
Submenus 116, 118
TEL* menu 138
Trip computer menu 136Vehicle submenu 132
Convenience submenu 133
Activating easy-entry/exit feature 133
Setting key dependency 135
Setting parking position for exterior
rear view mirror 135
Coolant 256, 355
Adding 257
Anticorrosion/antifreeze quantity 355
Capacities 351
Checking level 256
Messages in display 289, 290
Temperature 250
Temperature display 112
Warning lamp 281, 290
Coolant level
Checking 256
Cruise control 193, 362
Canceling 194
Driving downhill 194
Driving uphill 194
Fine adjustment 195
Lever 200
Saving current speed 194
Setting speeds 195
Cruise control lever 193Cup holder
Cleaning 273
Closing 220, 221
In rear seat armrest 220
In the dashboard 220
Opening 220, 221
Customer Assistance Center (CAC) 362
D
Daytime running lamp mode 106
Setting 129, 130
Deactivating
Air conditioning (cooling) 163
Air recirculation mode 160
Alarm 80
Anti-theft alarm system 80
Automatic climate control 155
Central locking (control system) 133
Cruise control 194
Defrost 159
Distance warning function* 205
Distronic* 203
Engine with KEYLESS-GO* 52
Engine with the key 51
ESP 78
Exterior lamps 106
Hazard warning flasher 108

380 IndexLoading 212
Cargo tie-down rings 218
Instructions 217
Roof rack 212
Ski sack* 212
Split rear bench seat 215
Locator lighting 107
Setting 130
Lock button 363
Lock buttons 363
Door handle (KEYLESS-GO*) 53
Locking 50, 84
Fuel filler flap 251
Global with KEYLESS-GO* 90
Global, SmartKey 85
The vehicle with KEYLESS-GO* 91
Trunk lid, separately 94
Vehicle in an emergency 311
Loss of keys 87, 91
Loss of Service and Warranty Information
Booklet 341
Low beam headlamps
Messages in display 296
Replacing bulbs 317, 319
Lowering
Vehicle 328Lubricants
Technical data 351
M
Main dimensions 349
Maintenance 12, 266
Malfunction
Displaying 123
Malfunction memory 122
Calling up 122
Manual headlamp mode 106
Manual operations
Fuel filler flap 313
Interior lighting control 110
Locking the vehicle 311
Sliding/pop-up roof 314
Unlocking the driver’s door 310
Unlocking the trunk lid 311
Unlocking transmission selector lever
313
Manual shift program, CLK 55 AMG 146
MAXCOOL maximum cooling 159
Mechanical key 310Memory function 102, 364
Recalling positions from memory 103
Storing exterior rear view mirror park-
ing positions 103
Storing key dependent settings 103
Menus 115
AUDIO 119
Control system 364
Distronic* 121, 199
In control system 117, 118
Malfunction memory 122
NAVI 121
Settings menu 123
Standard display 119
Submenus 116
TEL* 138
Trip computer 136
Microphone
Hands-free microphone 27
Miles/kilometers in speedometer
Setting 126
Minispare wheel 307
Bolts 309
Mounting 324
Technical data 347