2006 MERCEDES-BENZ CLK COUPE battery

360 Practical hintsWhat to do if …?Lamps in instrument clusterGeneral information:
If any of the following lamps in the instru-
ment cluster fails to come on during thebulb self-check when switching on the igni-
tion, have the respective bulb checked and
replaced if necessary.Problem
Possible cause/consequence
Suggested solution
-
The yellow ABS indicator lamp
comes on while driving.
The ABS has detected a malfunction and has
switched off. The BAS and the ESP
® are also
switched off (see messages in display).
The brake system is still functioning normally
but without the ABS available.
If the ABS control unit is malfunctioning,
other systems such as the navigation
system* or the automatic transmission may
also be malfunctioning.

Continue driving with added caution.
Wheels will lock during hard braking,
reducing steering capability.

Read and observe messages in the
multifunction display (
page 372).

Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
The charging voltage has fallen below
10 volts. The ABS has switched off.
The battery might not be charged sufficiently.
When the voltage is above this value
again, the ABS is operational again and
the ABS indicator lamp should go out.
If the ABS indicator lamp does not go out:
Have the generator (alternator) and
the battery checked.

375 Practical hints
What to do if …?
Display message
Possible cause/consequence
Possible solution
ESP
unavailable
See Operator’s Manual
The charging voltage has fallen below
10 volts. The battery might not be charged
sufficiently.
The ESP
®, BAS and the Run Flat Indicator* are
deactivated.
The brake system is still functioning normally
but without the systems specified above.

Continue driving with added caution.

If necessary, have the generator and
battery checked.
When the voltage is above this value again,
the ESP
® is operational again.
malfunction
Visit workshop
The ESP
® is deactivated because of a
malfunction.
The ESP®, BAS and the Run Flat Indicator* are
deactivated.
The brake system is still functioning normally
but without the systems specified above.

Continue driving with added caution.

Visit an authorized Mercedes-Benz
Center as soon as possible.
Failure to follow these instructions
increases the risk of an accident.
Display malfunction
Visit workshop
The ESP
® or the ESP
® display is
malfunctioning.

Continue driving with added caution.

Visit an authorized Mercedes-Benz
Center as soon as possible.
Failure to follow these instructions
increases the risk of an accident.

382 Practical hintsWhat to do if …?Symbol messagesDisplay symbol
Display message
Possible cause/consequence
Possible solution
#
Visit workshop
The battery is no longer charging.
Possible causes:

broken poly-V-belt


alternator malfunctioning

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
result in damage to the engine. Notify
an authorized Mercedes-Benz Center.
If it is intact:

Drive immediately to the nearest
authorized Mercedes-Benz Center.
Low voltage
Charge battery
The battery has insufficient voltage.

Start the engine (
page 48).
Low voltage
Switch off
consumers
The battery has insufficient voltage.

Turn off unnecessary electrical con-
sumers.

390 Practical hintsWhat 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 305).
Y
Hood open
You are driving with the hood open.

Close the hood (
page 309).
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 409).
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.

409 Practical hints
Replacing SmartKey batteries
Replacing SmartKey batteries
If the batteries in the SmartKey or the
SmartKey with KEYLESS-GO* are dis-
charged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an
authorized Mercedes-Benz Center.Batteries contain materials that can harm
the environment if disposed of improperly.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.Warning!
G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen inserting the batteries, make
sure they are clean and free of lint.
iWhen changing batteries, always
replace both batteries.
The required replacement batteries are
available at any Mercedes-Benz
Center.

410 Practical hintsReplacing SmartKey batteriesSmartKey
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key
(page 404).
1Mechanical key
2Slide
3Battery compartment

Insert the mechanical key 1 in direc-
tion of arrow in side opening.

Using mechanical key1, push gray
slide2 to unlatch battery
compartment3.

Pull battery compartment3 out of the
housing in the direction of arrow.
4Battery
5Contact spring

Remove the batteries4 in direction of
arrow.

Using a lint-free cloth, insert new
batteries4 under the contact
spring5 with the positive terminal (+)
side facing up.

Return battery compartment 3 into
housing until it locks into place.

Slide mechanical key 1 back into the
SmartKey.

Check the operation of the SmartKey.

411 Practical hints
Replacing SmartKey batteries
SmartKey with KEYLESS-GO*
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key
(page 404).

Insert the mechanical key in side open-
ing and push grey slide (
page 410).
The battery compartment is unlatched.

Pull the battery compartment out of the
housing (
page 410).1Battery
2Tilt battery up
3Mechanical key

Using mechanical key3, apply
pressure to position2.
Battery1 tilts up slightly.

Pull batteries1 out in the direction of
arrow.

Using a lint-free cloth, insert new
batteries1 under the contact spring
with the positive terminal (+) side
facing up.

Return battery compartment into hous-
ing until it locks into place.

Slide mechanical key 3 back into the
SmartKey.

Check the operation of the SmartKey
and the KEYLESS-GO*.

426 Practical hintsBatteryThe 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 315).
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.