2004 MERCEDES-BENZ CLK320 COUPE cooling

322 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause
Possible solution
?
Visit workshop!
There 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
Coolant
Check level
The coolant level is too low.

Add coolant (
page 286).

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.

324 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause
Possible 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.
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.

389 Technical data
Fuels, coolants, lubricants, etc.
Model
Capacity
Fuels, coolants, lubricants, etc.
Cooling system
CLK 320
CLK 500
CLK 55 AMG
approx. 10.7 US qt (10.0 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
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 (6.0 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 394).

392 Technical dataFuels, 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
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 corro-
sion 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 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 Service Booklet for replace-
ment interval.
Coolant system design and coolant used
stipulate the replacement interval. The
replacement interval published in the
Service 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, con-
sult your authorized Mercedes-Benz
Center.

403 Index
A
ABS 23, 76, 397
Malfunction indicator lamp 306
Messages in display 315
Accelerator position,
automatic transmission 163
Accident
In case of 50
Activating
Air conditioning (cooling) 181
Air recirculation mode 178
Anti-theft alarm system 82
Automatic climate control 173
Central locking (control system) 149
Charcoal filter 179, 180
Distance warning function* 230
Distronic* 225, 226
Easy-entry/exit feature 150
ESP 80
Exterior headlamps 47
Exterior lamps 120
Exterior rear view
mirror parking position 168
Front and rear fog lamp 121, 122
Hazard warning flasher 123
Headlamps 47High beams 123
Ignition 31
Ignition with KEYLESS-GO* 33
Immobilizer 53, 81
Manual shift program
CLK 55 AMG 164
Rapid seat heating*
with seat ventilation* 115
Rapid seat heating*
without seat ventilation* 114
Rear window defroster 171
Residual heat 181
Seat heating*
with seat ventilation* 115
Seat heating*
without seat ventilation* 114
Seat ventilation* 113
Steering wheel gearshift
control (CLK 55 AMG) 164
Tow-away alarm 83
Trunk lid opening limiter*
(control system) 149
Windshield wipers 49Adding
Coolant 287
Engine oil 285
Additional turn signals 351
Adjustable air vents,
rear passenger compartment 182
Adjusting 34
Air distribution 176
Air volume 177
Backrest tilt 36
Exterior rear view mirror 39
Head restraint height 36
Head restraint tilt 36
Instrument cluster illumination 126
Interior rear view mirror 38
Mirrors 38
Multicontour seat* 112
Seat cushion depth 112
Seat cushion tilt 36
Seat fore and aft adjustment 35
Seat height 36
Seats 34
Steering column in/out 38
Steering column up/down 38
Steering wheel 37

404 IndexAir conditioning (cooling)
Turning off 181
Turning on 181
Air conditioning refrigerant 390
Air distribution
Adjusting 176
Air pressure see Tire inflation pressure
Air recirculation mode 178
Activating 178
Deactivating 179
Air vents, rear passenger compartment
Adjustable 182
Air volume
Adjusting 177
Airbags 59
BabySmart
TM
airbag deactivation system 397
Children 60
Front 63
Passenger 63
Safety guidelines 62
Side impact 64
Window curtain 64Alarm
Audible 75, 83, 84
Canceling 83, 84
Visual 82
Alarm system
Anti-theft 82
Alignment bolt 360
Alignment bolt (vehicle tool kit) 397
Anticorrosion/antifreeze 393
Antiglare
Automatic 167
Antilock brake system (ABS) 397
Anti-theft alarm system
Arming 82
Canceling alarm 83, 84
Disarming 82
Anti-theft systems 81
Anti-theft alarm system 82
Immobilizer 81
Tow-away alarm 83
Aquaplaning see Hydroplaning
Armrest
Storage spaces 246Ashtray (Center console) 247
Opening 247
Reinstalling 248
Removing 248
Ashtray (Rear seat) 248
Opening 248
Reinstalling 248
Removing 248
At the gas station 278
ATF (automatic transmission fluid) 286
AUDIO menu 134
Selecting radio station 135
Selecting satellite radio* station 135
Audio system 183
Audio and telephone, operation 183
Button and soft key operation 186
Cassette operation 196
CD operation 199
Operating and display elements 184
Operating safety 183
Operation 186
Radio operation 189
Switching off 186
Switching on 186
Telephone operation 203

409 Index
Convenience submenu 149
Activating
easy-entry/exit feature 150
Setting key-dependency 151
Setting parking position
for exterior rear view mirror 151
Coolant 286, 392
Adding 287
Anticorrosion/antifreeze
quantity 392
Capacities 388
Checking level 286
Messages in display 322
Temperature 277
Temperature indicator 127
Warning lamp 309, 323
Coolant level
Checking 286Cruise control 218, 398
Canceling 219
Driving downhill 219
Driving uphill 219
Fine adjustment 220
Lever 225
Messages in display 317
Setting current speed 219
Setting to last stored speed
("Resume" function) 220
Cruise control lever 218
Cup holder
Cleaning 303
Closing 245
In rear seat armrest 245
In the dashboard 245
Opening 245
Customer Assistance Center (CAC) 398D
Daytime running lamp mode 121
Setting 145, 146
Deactivating
Air conditioning (cooling) 181
Air recirculation mode 179
Alarm 82
Anti-theft alarm system 82
Automatic climate control 173
Central locking (control system) 149
Defrosting 177
Distance warning function* 230
Distronic* 225, 228
Engine with KEYLESS-GO* 54
Engine with the SmartKey 53
ESP 79
Exterior lamps 120
Hazard warning flasher 124
Headlamps 53
Immobilizer 81
Interior lighting
delayed switch-off 148
Manual shift programm
CLK 55 AMG 165
Rapid seat heating*
with seat ventilation* 115

418 IndexLoss of Service and
Warranty Information Booklet 377
Loss of SmartKey 89
Loss of SmartKey with KEYLESS-GO* 95
Low beam headlamps
Messages in display 330
Replacing bulbs (Bi-Xenon*) 351
Replacing bulbs (Halogen) 351, 353
Lowering
Vehicle 362
Lubricants
Technical data 388M
Main dimensions 386
Maintenance 12, 296
Malfunction
Displaying 138
Malfunction memory 138
Calling up 138
Manual gear shifting
Transmission program
mode M (Manual) 164
Manual headlamp mode 120
Manual operations
Fuel filler flap 347
Interior lighting control 125
Locking the vehicle 344
Sliding/pop-up roof* 348
Unlocking gear selector lever 347
Unlocking the driver’s door 343Manual shift program mode (CLK 55 AMG)
Downshifting 165
Upshifting 165
Manual shift programm CLK 55 AMG
Activating 164
Deactivating 165
Manual shift programm mode
CLK 55 AMG 164
MAXCOOL maximum cooling 177
Mechanical key 343
Memory function 116, 400
Recalling positions
from memory 117
Storing exterior rear view
mirror parking positions 118
Storing key-dependent settings 117