2005 MERCEDES-BENZ SLK350 key battery

189 Controls in detail
Automatic climate control*
Residual heat and ventilation
With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes, depending on the
temperature setting of the climate control.
This feature makes use of the residual heat
produced by the engine.
Activating
Turn the SmartKey in the starter switch
to position1or0, or remove it from
the starter switch.

Press residual heat/ventilation
switchT (
page 185).
The indicator lamp on the residual
heat/ventilation switchT comes
on.Deactivating

Press residual heat/ventilation
switchT again (
page 185).
The indicator lamp on the residual
heat/ventilation switchT goes out.
The residual heat switches off
automatically


when you switch on ignition
(page 35)


after about 30 minutes


if the battery voltage drops
Defrosting
Windows fogged up on the inside
Press defrosting switchP
(page 185).
The indicator lamp on defrosting
switchP comes on.
The temperature rises and the ventila-
tion operates with maximum blower
speed.

Press defrosting switchP again.
The previous automatic climate control
settings will be activated again.
iHow long the system will provide heat-
ing depends on the coolant tempera-
ture and the temperature set by the
operator. The blower will run at speed
setting1 regardless of the air distribu-
tion control setting.

236 Controls in detailPower windows
Aim transmitter eye at the outside
driver’s or passenger door handle.
Opening (Summer opening feature)

Press and hold buttonΠafter un-
locking the vehicle.
The windows and retractable hardtop
begin to open after approximately
one second.
In the multifunction display you will see
the message
Retractable roof open
.

Release buttonΠon the SmartKey
to interrupt procedure.Closing (Convenience closing feature)

Press and hold lock button‹ after
locking the vehicle.
The windows and retractable hardtop
begin to close after approximately
one second.
In the multifunction display you will see
the message
Retractable roof
closed
.

Release button‹ on the SmartKey
to interrupt procedure.
Synchronizing power windows
The power windows must be synchronized

after the battery has been disconnect-
ed.


if the power windows cannot be fully
opened (Express-open) or closed
(Express-close).
Each power window must be synchronized.

Close all doors.

Switch on the ignition (
page 35).

Press and hold both switches1
and2 at the symbolj until the
windows are completely closed.

Hold on to switches1and2 for ap-
proximately one second.
The power windows are synchronized.
Warning!
G
If the retractable hardtop does not com-
pletely open or close, a warning sounds. In
the multifunction display you will see
K

and the message
Retractable roof
being lowered. After about 15 seconds
the roof hydraulics lose pressure.
Properly lock the retractable hardtop
(
page 240) before continuing to drive.

341 Practical hints
What to do if …
Where will I find...?
Unlocking/locking in an emergency
Opening/closing in an emergency
Replacing SmartKey batteries
Replacing bulbs
Replacing wiper blades
Flat tire
Battery
Jump starting
Towing the vehicle
Fuses

378 Practical hintsReplacing SmartKey batteriesIf the batteries in the SmartKey are dis-
charged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an autho-
rized 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.
When replacing batteries, always re-
place both batteries.
The required replacement batteries are
available at any Mercedes-Benz
Center.

379 Practical hints
Replacing SmartKey batteries
SmartKey
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key
(page 374).
1Mechanical key
2Battery compartment

Insert mechanical key1 in side open-
ing and push gray slide.
Battery compartment2 is unlatched.

Pull battery compartment2 out of the
housing in direction of arrow.

Remove the discharged batteries.
3Battery
4Contact spring

Using a lint-free cloth, insert new
batteries3 under contact spring4
with the plus (+) side facing up.

Return battery compartment2 into
the housing until it engages.

Slide mechanical key1 back into the
SmartKey.

Check the operation of the SmartKey.

396 Practical hintsBatteryThe battery is located in the engine com-
partment on the right-hand side below the
windshield washer fluid reservoir.
1Battery
2Positive terminal
3Negative terminal
Warning!
G
Failure to follow these instructions can re-
sult in severe injury or death.
Observe all safety instructions and precau-
tions when handling automotive batteries,
see “Battery” (
page 294).
Never lean over batteries while connecting
them, as you could otherwise be injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come into contact with
eyes, skin or clothing. In case it does, imme-
diately 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.
Warning!
G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof batteries only to avoid the
risk of acid burns in the event of an acci-
dent.!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 main-
tenance intervals or contact an autho-
rized Mercedes-Benz Center for further
information.

397 Practical hints
Battery
Disconnecting the battery
1Water tray
2Lock

Depress parking brake firmly or move
g e a r s e l ec t o r le v e r * t o p o s it io nP (man-
ual transmission to Neutral).

Switch off all electrical consumers.

Remove SmartKey from starter switch.

Open the hood (
page 287).

Turn locks2 one quarter turn.

Remove water tray1.

Read and observe safety instructions
and precautions (
page 396).

Disconnect the battery negative lead.

Remove the cover from the positive
terminal.

Disconnect the battery positive lead.
Removing the battery
Remove the screw on the swivel bar.

Remove the swivel bar.

Take out the battery.
Charging and reinstalling battery
Warning!
G
With a disconnected battery

you will no longer be able to turn the
SmartKey in the starter switch


automatic transmission*: the gear se-
lector lever will remain locked in
positionP
Warning!
G
Never charge a battery while still installed in
the vehicle unless the accessory battery
charge unit approved by Mercedes-Benz is
being used. Gases may escape during charg-
ing and cause explosions that may result in
paint damage, corrosion or personal injury.
An accessory battery charge unit specially
adapted for Mercedes-Benz vehicles and
tested and approved by Mercedes-Benz is
available, permitting the charging of the bat-
tery in its installed position. Contact an
authorized Mercedes-Benz Center for infor-
mation and availability. Charge battery in
accordance with the separate instructions
for the accessory battery charger.


403 Practical hints
Towing the vehicle
Installing towing eye bolt
The towing eye bolt is supplied with the ve-
hicle tool kit, located in the compartment
underneath the trunk floor (
page 369).
The towing eyes are located on the passen-
ger side in the front and rear bumper.

Take vehicle tool kit out of trunk
(page 369).1Cover in front bumper
2Cover in rear bumper

Press mark on corresponding cover1
or2 in direction of arrow for folding
down.

Lift cover off to reveal threaded hole for
towing eye bolt.
Do not remove cover completely.

Screw towing eye bolt in to its end stop
and tighten with lug wrench.

For removing towing eye bolt and rein-
stalling cover, follow the previously de-
scribed steps in reverse order.
iThe gear selector lever* will remain
locked in positionP (vehicles with au-
tomatic transmission*) and the Smart-
Key will not turn in the starter switch if
the battery is disconnected or dis-
charged. See notes on the battery
(page 396) or on jump starting
(page 399).
Vehicles with automatic transmission*:
For information on manual unlocking of
transmission selector lever, see
(page 376).
iWhen closing the cover, insert the
latches first and gently press on the
opposite side until the cover fully en-
gages.
Make sure the cover’s check strap
does not get caught when closing.