2007 MERCEDES-BENZ CLS550 ignition

365 Practical hints
What to do if …
Display message
Possible cause/con-
sequence
Possible solutionMonitor the 75 indicator lamp on the center console (
page 29) and
the multifunction display in the instrument cluster (
page 26) for the following:
With the seat unoccupied and the ignition turned on,


the 75 indicator lamp on the center console should illuminate and
remain illuminated, indicating that the OCS (
page 71) has deactivated the
front passenger front 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. De-
pending on the front passenger classification sensed by the OCS (
page 71), the
75 indicator lamp will remain illuminated or go out.
If above conditions are not met, the system is not working properly. Have the sys-
tem checked as soon as possible by an authorized Mercedes-Benz Center.
Warning!
G
If the 75 indicator lamp
remains illuminated with an adult occupant
on the front passenger seat even after per-
forming the above corrective steps,
do not have any passenger use the front
passenger seat until the system has been
repaired.

373 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
(USA only)ú(Canada only)±
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
Center.
H
Top up coolant
See Operator’s Manual
The coolant level is too low.

Add coolant (
page 290).

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.

376 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause/consequence
Possible solution
Z
The cooling fan for the coolant is
malfunctioning.

Observe the coolant temperature indicator in the
instrument cluster (
page 26).
If the coolant temperature is under 120°C, you may
continue driving to an authorized Mercedes-Benz
Center.

Avoid placing heavy loads on the engine (e.g. by
driving uphill) as well as stop-and-go traffic.

Have the fan replaced as soon as possible.
±
Display malfunction
Visit workshop
Certain electronic systems are
unable to relay information to
the control system. The follow-
ing systems may have failed:

Coolant temperature display


Tachometer


Cruise control display

Have the electronic systems checked by an autho-
rized Mercedes-Benz Center.
Engine
Service
There may be a malfunction in:

the fuel injection system


the ignition system


the exhaust system

Have the engine checked as soon as possible by an
authorized Mercedes-Benz Center.

465 Index
I
Identification labels 434
Identification Number, Vehicle (VIN) 435
Ignition 38, 40
Immobilizer 99
Indicator lamps see Lamps, indicator and
warning
Infant and child restraint systems see Chil-
dren in the vehicle
Inflation pressure see
Tires, Inflation pressure 301
Information button (Tele Aid) 261
Inside door handle 111
Installing
Wiper blades 411
Instrument cluster 26, 138
Coolant temperature indicator 139
Illumination brightness 138
Lamps 342
Messages in the multifunction
display 356
Multifunction display 141
Outside temperature indicator 140Instrument lighting see Instrument cluster,
Illumination brightness 138
Instrument panel see Instrument
cluster 138
Instruments and controls see
Cockpit 138
Interior lighting 135
Delayed shut-off 164
Interior rear view mirror 47, 185
Auto dimming 185
Interior storage space see Storage com-
partments
J
Jack 394
Jacking up the vehicle 414
Jump starting 423
K
Key, Mechanical 396
Loss of 110Key, SmartKey
Battery check lamp 105
Checking batteries 110
Factory setting 103
Global locking 104, 105
Global unlocking 104
Locking/unlocking 102, 105
Loss of 110
Messages in display 378
Opening and closing the power
tilt/sliding sunroof 210
Opening and closing the
windows 210
Remote control 102
Replacing batteries 402
Restoring to factory setting 105
Selective setting 104
Starter switch positions 38
Starting the engine 51, 52
Turning off the engine 60