2006 MERCEDES-BENZ CLK350 check engine

399 Practical hints
What to do if …?
Display symbol
Display message
Possible cause/consequence
Possible solution
•
Coolant
Stop, engine off
The poly-V-belt could be broken.

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

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

Do not continue to drive. Otherwise the en-
gine will overheat due to an inoperative water
pump which may result in damage to the en-
gine. 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.

Drive immediately to the nearest authorized
Mercedes-Benz Center.
Coolant
Visit workshop
The cooling fan for the coolant is mal-
functioning.

Observe the coolant temperature display.

Have the fan replaced as soon as possible.

401 Practical hints
What to do if …?
Display symbol
Display message
Possible cause/consequence
Possible solution
:
USA only:Add 1 qt. engine oil
at next refuelingCanada only:Add 1 liter engine oil
at next refueling
The engine oil level is too low.

Add engine oil (
page 325) and check
the engine oil level (
page 323).
Engine oil level
Reduce oil level
You have added too much engine oil.
There is a risk of damaging the engine or
the catalytic converter.

Have oil siphoned or drained off. Ob-
serve all legal requirements with re-
spect to its disposal.
Engine oil level
Stop, engine off
There is no oil in the engine. There is a
danger of engine damage.

Carefully bring the vehicle to a halt as
soon as possible.

Turn off the engine.

Add engine oil (
page 325) and check
the engine oil level (
page 323).

402 Practical hintsWhat to do if …?When the message
Add 1 qt. engine oil
at next refueling (Canada:
1 liter
) ap-
pears while the engine 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.
Visually check for oil leaks. If no obvious oil
leaks are noted, drive to the nearest ser-
vice station where the engine oil should be
topped to the required level with an
approved oil specified in the Factory
Approved Service Products pamphlet.
Display symbol
Display message
Possible cause/consequence
Possible solution
:
Engine oil level
Visit workshop
The engine oil has dropped to a critical
level.

Check the engine oil level
(page 323) and add oil as required
(page 325).

If you must add engine oil frequently,
have the engine checked for possible
leaks.
The measuring system is malfunctioning.

Have the measuring system checked
by an authorized Mercedes-Benz
Center.!The engine oil level warnings should
not be ignored. Extended driving with
the symbol displayed could result in
serious engine damage that is not
covered by the Mercedes-Benz Limited
Warranty.

403 Practical hints
What to do if …?
Display symbol
Display message
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 318).
Y
Hood open
You are driving with the hood open.

Close the hood (
page 322).
I
Remove key
You have forgotten to remove the
SmartKey.

Remove the SmartKey from the start-
er switch.
Replace key
No additional code available for SmartKey
or SmartKey with KEYLESS-GO*.

Visit an authorized Mercedes-Benz
Center as soon as possible.
Key
Check battery
The SmartKey with KEYLESS-GO* batter-
ies are discharged.

Change the batteries (
page 435).
Key
not recognized
The SmartKey with KEYLESS-GO* is not
recognized while the engine is running be-
cause

the SmartKey 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 centrally
locked nor can the engine be started
again after the engine has been stopped.
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 necessary.
Keyless Go
Check system
The KEYLESS-GO* system is malfunction-
ing.

Visit an authorized Mercedes-Benz
Center as soon as possible.

410 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause/consequence
Possible solution
K
Lock top
The soft top is not properly locked.

Lock the soft top again (
page 259).
Top being opened
The soft top is not completely open or
closed. The hydraulics are losing pres-
sure.

Open or close the soft top all the way.
Top
Visit workshop
The soft top is malfunctioning.

Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Start engine to
operate top
The on-board voltage is too low.

Start the engine.
Top locked
as vehicle is moving
You have attempted to open or close the
soft top while driving.

Pull over to the side of the road and re-
peat soft top operation while the vehi-
cle is stationary.
_
Steering oil
Visit workshop
The steering gear oil level is too low. There
is a danger of steering gear damage.

Have the system checked by an autho-
rized Mercedes-Benz Center.
Warning!
G
If the level of steering gear oil in reservoir is
too low, the steering power assistance could
fail. Much greater effort will then be needed
to turn the steering wheel.
Do not add steering oil without checking the
steering system.
Do not drive the vehicle. Have the system
checked at an authorized Mercedes-Benz
Center as soon as possible.

423 Practical hints
Opening/closing in an emergency
Opening/closing in an emergency
Operating roll bars manually
Releasing roll bars manually
If the roll bar system is malfunctioning, you
can release the roll bars manually.

Close the soft top (
page 257).

Open the trunk (
page 108).

Fold back the luggage cover
(page 262).

Take hex wrench out of its storage
location in the storage well casing
(page 413).1Perforation

Push hex wrench through
perforation1 in trim of rear wall in
trunk.
Warning!
G
If the yellow roll bar warning lamp in
the clock does not go out after starting the
engine, or if it comes on while driving, then
the roll bar system is not operating properly
and may not activate in an accident. In this
case, raise the roll bars manually before
continuing to drive.
For safety reasons drive only with the roll
bars raised until the malfunction is repaired.
Have your vehicle checked at an authorized
Mercedes-Benz Center.
iWith the roll bars released, the soft top
cannot be operated using the soft top
switch and the rear head restraints
cannot be lowered using the rear head
restraint lowering switch.
Warning!
G
Make sure no one is located in the roll bar’s
path of motion while the next steps are be-
ing carried out.
When the roll bar is manually released, the
rear head restraints and the roll bar under-
neath shoot up almost instantaneously.


425 Practical hints
Opening/closing in an emergency

Press hex wrench down firmly in direc-
tion of arrow3 and hold.

Press head restraint down in direction
of arrow4.

Pull hex wrench 2 out and take weight
off head restraint.

Repeat this procedure on roll bar for
second head restraint.
Soft top emergency operation
If the soft top cannot be automatically
closed, check the following:

Is the luggage cover engaged in place
(page 262)?


Have the roll bars been released? If so,
lower the roll bars manually
(page 424).


Is the trunk lid closed (
page 110)?


Is there sufficient on-board voltage?
Start the engine if necessary.
These messages will also appear in the
multifunction display (
page 410).
If automatic operation still does not func-
tion properly, you can close the soft top
manually.
This procedure should be performed with
great care by two persons.
!Manually closing the soft top is a com-
plicated and technically demanding
procedure. Close the soft top manually
in emergency cases only. Otherwise,
visit an authorized Mercedes-Benz
Center. Please read the instructions
fully before beginning operation and
only undertake it with another person
and if you feel fully capable of perform-
ing the tasks involved. Warning!
G


It is important that a second person
helps you. Otherwise, you could become
trapped or injured.


Remove any wristwatches or jewelry
such as rings or bracelets. Otherwise,
they could get caught in the vehicle
mechanism, causing personal injury to
yourself or damage to the vehicle.


Always use the grips provided as indi-
cated. Otherwise you could injure your-
self.

453 Practical hints
Battery
Battery
The battery is located in the engine
compartment on the right hand side.
1Clamps
Removing filter box:
Release clamps1.

Remove filter box.
Installing filter box:

Insert filter box properly.

Secure it with clamps1.
Warning!
G
Failure to follow these instructions can re-
sult in severe injury or death.
Observe all safety instructions and
precautions when handling automotive
batteries (
page 328).
Never lean over batteries while connecting,
you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking etc.
!Never loosen or detach battery termi-
nal clamps while the engine is running
or the SmartKey is in the starter switch.
Otherwise the alternator and other
electronic components could be se-
verely damaged.
Have the battery checked regularly by
an authorized Mercedes-Benz Center.
Refer to Maintenance Booklet for
maintenance intervals or contact an
authorized Mercedes-Benz Center for
further information.Warning!
G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof battery only to avoid the risk
of acid burns in the event of an accident.