MERCEDES-BENZ CLS550 2007 W219 Owner's Manual

370 Practical hintsWhat to do if …Symbol messagesDisplay symbol
Display messages
Possible cause/consequence
Possible solution
V

You are driving with one or more doors
open.

Close the doors.
Y
You are driving with the hood open.

Close the hood (
page 286).
Ê
This message will appear whenever the
trunk is open.

Close the trunk.
#
The battery is no longer charging.
Possible causes:

alternator malfunctioning


broken poly-V-belt
Do not forget that the brake system
requires electrical energy and may be
operating with restricted capability.
Considerably greater brake pedal force is
required and the stopping distance is
increased.

Stop immediately in a safe location or
as soon as it is safe to do so and
check the poly-V-belt.
If it is broken:

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

Drive immediately to the nearest
authorized Mercedes-Benz Center.
Adjust driving to be consistent with
reduced braking responsiveness.

371 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
#
There is a malfunction in the electronic
system.

Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
#
Battery/Alternator
Stop vehicle
The battery is malfunctioning.
The brake system requires electrical en-
ergy and therefore has only limited oper-
ation. Considerably greater brake pedal
force is required and the stopping dis-
tance is increased.

Stop the vehicle as soon as it is safe
to do so. Adjust driving to be consis-
tent with reduced braking responsive-
ness.

Call Roadside Assistance.

Notify an authorized Mercedes-Benz
Center.
#
Low voltage
Start engine
The battery has insufficient voltage.

Start the engine (
page 51).
2
Brakepad wear
The brake pads have reached their wear
limit.

Have the brake pads replaced as soon
as possible.
!
Brake pad thickness must be visually in-
spected by a qualified technician at the intervals
specified in the Maintenance Booklet.

372 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause/consequence
Possible solution
(USA only);(Canada only)!
Release parking
brake
You are driving with the parking brake
set.

Release the parking brake
(page 53).
(USA only);(Canada only)3
EBV, ABS, ESP
inoperative
See Operator’s Man.
ABS, ESP
®, EBP as well as PRE-SAFE
®
have switched off due to a malfunction.
BAS is also switched off.
The brake system is still functioning nor-
mally but without the ABS, BAS, ESP
® and
PRE-SAFE
® available.

Continue driving with added caution.

Adjust driving to be consistent with
reduced braking responsiveness.

Contact an authorized
Mercedes-Benz Center as soon as
possible.
(USA only);(Canada only)3
Check
brake fluid level
There is insufficient brake fluid in the
reservoir.

Risk of accident! Stop the vehicle in a
safe location and notify an authorized
Mercedes-Benz Center. Do not add
brake fluid! This will not solve the
problem.
Warning!
G
Driving with the messages
Check brake
fluid level
displayed can result in an ac-
cident. Have your brake system checked im-
mediately.
Do not add brake fluid before checking the
brake system. Overfilling the brake fluid res-
ervoir can result in spilling brake fluid on hot
engine parts and the brake fluid catching
fire. You can be seriously burned.
!
If you find that the brake fluid in the brake
fluid reservoir has fallen to the minimum mark or
below, have the brake system checked for brake
pad thickness and leaks.

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.

374 Practical hintsWhat to do if …
During severe operation conditions and
stop-and-go city traffic, the coolant tem-
perature may rise close to 248°F (120°C).
Display symbol
Display messages
Possible cause/consequence
Possible solution
Z
Coolant
Stop, turn engine off
The coolant is too hot.

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

Only start the engine again after the mes-
sage disappears. You could otherwise dam-
age the engine.

Apply the parking brake (
page 53).

Observe the coolant temperature indicator
in the instrument cluster (
page 26).
If the temperature rises again:

Contact an authorized Mercedes-Benz
Center immediately.
Warning!
G
Driving when your engine is badly overheat-
ed can cause some fluids which may have
leaked into the engine compartment to
catch fire. You could be seriously burned.
Steam from an overheated engine can cause
serious burns and can occur just by opening
the engine hood. Stay away from the engine
if you see or hear steam coming from it.
Stop the vehicle in a safe location away from
other traffic. Turn off the engine, get out of
the vehicle and do not stand near the vehicle
until the engine has cooled down.
!
The engine should not be operated with the
coolant temperature above 248°F (120°C).
Doing so may cause serious damage which is not
covered by the Mercedes-Benz Limited
Warranty.

375 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
Z
Coolant
Stop, turn engine off
The poly-V-belt could be broken.

Stop the vehicle in a safe location and immediately
turn off the engine.

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

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

Do not continue to drive the vehicle with this mes-
sage displayed. Doing so could result in serious en-
gine damage that is not covered by the
Mercedes-Benz Warranty.

Observe the coolant temperature indicator in the
instrument cluster (
page 26).

Drive immediately to the nearest authorized
Mercedes-Benz Center.

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.

377 Practical hints
What to do if …
When the
Check oil level - at next re-
fueling message appears while the en-
gine is running and at operating
temperature, the engine oil level has
dropped to approximately the minimum
level.
When this occurs, the warning will first
come on intermittently and then stay on if
the oil level drops further.If no oil leaks are noted, continue to drive
to the nearest service station where the
engine oil should be topped to the required
level with an approved engine oil.
For information on approved engine oils,
refer to the Factory Approved Service
Products pamphlet (USA only) or contact
an authorized Mercedes-Benz Center.
Display symbol
Display messages
Possible cause/consequence
Possible solution
:
Check oil level
at next refueling
There is no oil in the engine. There is
a danger of engine damage.

Check the engine oil level (
page 288) and
add engine oil as required (page 289).

If you must add engine oil frequently, have
the engine checked for possible leaks.!
The engine oil level warnings should not be
ignored. Extended driving with the symbol dis-
played could result in serious engine damage
that is not covered by the Mercedes-Benz Limit-
ed Warranty.

378 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause/consequence
Possible solution
A
Reserve fuel
The fuel level has dropped below the re-
serve mark.

Refuel at the next gas station
(page 283).
Gas cap is open
A loss of pressure has been detected in
the fuel system. The fuel cap may not be
closed properly or the fuel system may be
leaky.

Check the fuel cap (
page 283).
If it is not closed properly:

Close the fuel cap.
If it is closed properly:

Have the fuel system checked by an
authorized Mercedes-Benz Center.
»
Replace air cleaner
The air cleaner is clogged.

Have the air cleaner checked by an
authorized Mercedes-Benz Center.
F
Remove key
You have forgotten to remove the
SmartKey.

Remove the SmartKey from the start-
er switch.
F
Get a new key
The SmartKey is malfunctioning.

Contact an authorized
Mercedes-Benz Center.
F
Key
still in vehicle
A SmartKey with KEYLESS-GO* left in the
vehicle was recognized while locking the
vehicle from the outside.

Take the SmartKey with
KEYLESS-GO* out of the vehicle.

379 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
F
Please don't
forget your key
This display appears (for a maximum of
60 seconds) if the driver’s door is opened
with the engine turned off and no
SmartKey in the starter switch.
This message is only a reminder.

Take the SmartKey or SmartKey with
KEYLESS-GO* with you when leaving
the vehicle.
Change
key batteries
The SmartKey with KEYLESS-GO* batter-
ies are discharged.

Replace the batteries (
page 402).
Key
not recognized
The SmartKey with KEYLESS-GO* is not
recognized while the engine is running
because

the SmartKey with KEYLESS-GO* is
not in the vehicle


there is strong radio-frequency inter-
ference

Stop the vehicle as soon as it is safe
to do so.

Search for the SmartKey.
Otherwise the vehicle cannot be cen-
trally locked nor can the engine be
started again after the engine is
stopped.
Key
not recognized
The SmartKey with KEYLESS-GO* is mo-
mentarily not recognized.

Change the position of the SmartKey
in the vehicle.

Operate the vehicle with the
SmartKey in the starter switch if nec-
essary.