2007 MERCEDES-BENZ CLK550 COUPE Air Condition

368 Practical hints
What to do if …?
Vehicle status messages in the
multifunction display
Warning and malfunction messages
appear in the multifunction display located
in the instrument cluster.
Certain warning and malfunction messag-
es are accompanied by an audible signal.
Address these messages accordingly and
follow the additional instructions given in
this Operator’s Manual.
Selecting the vehicle status message
memory menu in the control system
(
page 149) displays both cleared and
uncleared messages.
High-priority messages appear in the
multifunction display in red color.Certain messages of high priority cannot
be cleared from the multifunction display
using the reset button (
page 138) or but-
ton k,j, è, orÿ on the
steering wheel.
Other messages of high priority and
messages of less immediate priority can
be cleared from the multifunction display
using the reset button (
page 138) or but-
ton k,j, è, orÿ on the
steering wheel. They are then stored in the
vehicle status message memory
(
page 149). Remember that clearing a
message will only make the message dis-
appear. Clearing a message will not cor-
rect the condition that caused the
message to appear.
Warning!G
All categories of messages contain
important information which should be
taken note of and, where a malfunction is
indicated, addressed as soon as possible at
an authorized Mercedes-Benz Center.
Failure to repair condition noted may cause
damage not covered by the Mercedes-Benz
Limited Warranty, or result in property
damage or personal injury.

369 Practical hints
What to do if …?
On the pages that follow, you will find a
compilation of the most important warning
and malfunction messages that may
appear in the display.
High priority messages appear in red color.
For your convenience the messages are
divided into two sections:

Text messages (page 370)

Symbol messages (page 378)
Warning!G
No messages will be displayed if either the
instrument cluster or the multifunction
display is inoperative.
As a result, you will not be able to see infor-
mation about your driving conditions, such
as speed or outside temperature, warn-
ing/indicator lamps, malfunction/warning
messages or the failure of any systems.
Driving characteristics may be impaired.
If you must continue to drive, please do so
with added caution. Visit an authorized
Mercedes-Benz Center as soon as possible.
iSwitching on the ignition causes all
instrument cluster lamps (except low beam
headlamp indicator lamp, high beam headlamp
indicator lamp, and turn signal indicator lamps
unless activated) as well as the multifunction dis-
play to come on. Make sure the lamps and the
multifunction display are in working order before
starting your journey.

373 Practical hints
What to do if …?
Display messagePossible cause/
consequencePossible solution
Monitor the 56indicator lamp on the center console (page 29) and the mul-
tifunction display in the instrument cluster (
page 26) for the following:
With the seat unoccupied and the ignition turned on,

the 56indicator lamp on the center console should illuminate and remain
illuminated, indicating that the OCS (
page 70) has deactivated the air bag.

the message Front passenger airbag enabled See Operator’s Manual or the
message
Front passenger airbag disabled See Operator’s Manual should not
appear in the multifunction display at any time the seat is unoccupied. Wait at last
60 seconds for the system to complete the necessary check cycles and to make
sure neither message appears in the multifunction display.
If above conditions are met, you can occupy the front passenger seat again. Depend-
ing on the front passenger classification sensed by the OCS (
page 70), the
56indicator lamp will remain illuminated or go out.
If above conditions are not met, the system is not working properly. Have the system
checked as soon as possible by an authorized Mercedes-Benz Center.
Warning!G
If the 56indicator lamp remains
out even after performing the above correc-
tive steps, do not have any children 12 years
old and under and other small individuals use the front passenger seat until the sys-
tem has been repaired.

375 Practical hints
What to do if …?
Display messagePossible cause/
consequencePossible solution
Monitor the 56indicator lamp on the center console (page 29) and the mul-
tifunction display in the instrument cluster (
page 26) for the following:
With the seat unoccupied and the ignition turned on,

the 56indicator lamp on the center console should illuminate and remain
illuminated, indicating that the OCS (
page 70) has deactivated the air bag.

the message Front passenger airbag enabled See Operator’s Manual or the
message
Front passenger airbag disabled See Operator’s Manual should not
appear in the multifunction display at any time the seat is unoccupied. Wait at last
60 seconds for the system to complete the necessary check cycles and to make
sure neither message appears in the multifunction display.
If above conditions are met, you can occupy the front passenger seat again. Depend-
ing on the front passenger classification sensed by the OCS (
page 70), the
56indicator lamp will remain illuminated or go out.
If above conditions are not met, the system is not working properly. Have the system
checked as soon as possible by an authorized Mercedes-Benz Center.
Warning!G
If the 56indicator lamp remains
illuminated with an adult occupant on the
front passenger seat even after performing
the above corrective steps, do not have anypassenger use the front passenger seat until
the system has been repaired.

440 Technical data
Layout of poly-V-belt drive
CLK 350/CLK 550
1Idler pulley
2Idler pulley
3Automatic belt tensioner
4Power steering pump
5Air conditioning compressor
6Crankshaft
7Coolant pump
8Generator (alternator)

449 Technical data
Fuels, coolants, lubricants, etc.
ModelCapacityFuels, coolants, lubricants, etc.
Cooling systemCLK 350
CLK 550approx. 7.8 US qt (7.4 l)
approx. 9.7 US qt (9.2 l)MB 325.0 Anticorrosion/Antifreeze
Agent
Fuel tank
including a reserve of16.35 US gal (62.0 l)
2.11 US gal (8.0 l)Premium unleaded gasoline:
Minimum Posted Octane 91
(Avg.of96RON/86MON)
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 455).

450 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 re-
quired for vehicles with Maintenance
System (U.S. vehicles) or FSS (Canada
vehicles). For a listing of approved engine
oils and oil filters, refer to the Factory Ap-
proved Service Products Pamphlet, or
contact an authorized Mercedes-Benz
Center.
Engine oil additives
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.
Air conditioning refrigerant
R-134a (HFC) refrigerant and special PAG
lubricating oil are used in the air
conditioning system.
Never use R-12 (CFC) or mineral-based
lubricating oil. Otherwise damage to the
system will occur.
Brake fluid
During vehicle operation, the boiling point
of the brake fluid is continuously reduced
through the absorption of moisture from
the atmosphere.
Only brake fluid approved by
Mercedes-Benz is recommended. An
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 (U.S. vehicles) or FSS
(Canada vehicles), or changing of oil and oil filter
at change intervals longer than those called for
by the Maintenance System (U.S. vehicles) or
FSS (Canada vehicles) will result in engine or
emission control system damage not covered by
the Mercedes-Benz Limited Warranty. Please follow Maintenance System
(U.S. vehicles) or FSS (Canada vehicles) recom-
mendations 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.
Warning!G
Under extremely strenuous operating condi-
tions, this moisture content can lead to the
formation of bubbles in the system, thus re-
ducing the system’s efficiency.
Therefore, the brake fluid must be replaced
regularly. Refer to your vehicle's Mainte-
nance Booklet for replacement interval.

457 Index
A
ABS 27, 88
Malfunction indicator lamp 356
Messages in display 370
Accelerator position,
automatic transmission 172
Accessory weight 337
Accident 58
Active head restraints 79
Resetting 403
Air bags 65
Children 80
Front passenger front
air bag off indicator lamp 74
Front side impact air bags 70
Front, Driver 69
Front, Passenger 69
Occupant Classification System
(OCS) 70
Rear side impact air bags* 70
Safety guidelines 68
Window curtain 70
Air conditioning refrigerant 450
Air conditioning system
see Climate control systemAir conditioning, Cooling 192, 204
Air distribution 188, 199
Air pressure see Tires, Inflation pressure
Air recirculation mode 190, 201
Air vents 193, 206
Air volume 188, 200
Alarm system see Anti-theft systems
Alignment bolt (vehicle tool kit) 394, 418
Anticorrosion/antifreeze 453, 454
Antiglare, Rear view mirror 179, 180
Anti-theft systems 94
Anti-theft alarm system 94
Immobilizer 94
Aquaplaning see Hydroplaning
Armrest 270, 271
Ashtrays 272, 273
Aspect ratio 337
ATF 309
AUDIO menu 147
CD player (CD, MP3-CD) 148
Radio station 147
Radio station (satellite*) 147
Search function 161Audio system 207
Button and soft key operation 210
CD changer* 226
CD operation 223
Emergency calls "911" 243
MP3 224
Operating and display elements 208
Operating audio system 207
Operating safety 207
Radio operation 214
Sound system* 211
Switching on/off 210
Telephone* operation 207, 230
Auto-dimming, Rear view mirror 180
Automatic central locking,
Control system 118, 162
Automatic climate control see
Climate control system
Automatic headlamp mode see Headlamps
Automatic lighting control,
Interior lighting 136
Automatic locking when driving 118
Automatic shift program 174