2009 MERCEDES-BENZ SLR key battery

102 Controls in detailLocking and unlocking
Opening the trunk
Opening the trunk from the outside
A minimum height clearance of
5.5 ft (1.66 m) is required to open the
trunk lid.
The handle is located above the rear
license plate recess.
1Trunk lock
2Handle The vehicle must be unlocked.

Pull on handle2 and lift the trunk lid.
The trunk can also be opened using
buttonŠ on the SmartKey or from its
inside in an emergency, see “Trunk emer-
gency release” (
page 104).
Opening the trunk from the inside
You can open the trunk from the inside if
the vehicle is stationary.
A minimum height clearance of
5.5 ft (1.66 m) is required to open the
trunk lid.
!
The door windows will not open or close if
the battery is discharged or the door windows
are impeded by ice. In this case open or close
the door with increased caution. Do not attempt
to force the door opened or closed. Doing so
may damage the door seals or the side window.
i
If the vehicle has previously been locked
with the SmartKey, opening a door from the
inside will trigger the anti-theft alarm system.
To cancel the alarm, do one of the following:


Press buttonŒ or‹ on the
SmartKey.


Insert the SmartKey in the starter switch.
!
Always make sure that there is sufficient
overhead clearance.

104 Controls in detailLocking and unlockingTrunk emergency release
The emergency release button is located
on the inside of the trunk lid.
With the emergency release button, the
trunk can be opened from inside the trunk.Emergency release button
Briefly press emergency release
button.
The trunk unlocks and the trunk lid
opens slightly.

Push up the trunk lid to fully open.The emergency release button unlocks the
trunk while the vehicle is standing still or in
motion.
Illumination of the emergency release
button:


The button will flash for 30 minutes
after opening the trunk.


The button will flash for 60 minutes
after closing the trunk.
The emergency release button does not
open the trunk lid if the vehicle battery is
discharged or disconnected.
Automatic locking
The doors and the trunk lock automatically
when the vehicle is set into motion.
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
The doors unlock automatically after an ac-
cident if the force of the impact exceeds a
preset threshold.
The vehicle locks automatically when the
ignition is switched on and the wheels are
turning at vehicle speeds of approximately
9 mph (15 km/h) or more. You could
therefore lock yourself out when the vehi-
cle is pushed or is on a test stand.
You can deactivate the automatic locking
using the control system (
page 139).
i
If the vehicle has previously been locked
from the outside with the SmartKey, opening the
trunk from the inside using the emergency
release button will trigger the anti-theft alarm
system.
To cancel the alarm, do one of the following:


Press buttonŒ or‹ on the
SmartKey.


Insert the SmartKey in the starter switch.

106 Controls in detailLightingFor information on how to switch on the
headlamps and use the turn signals, see
“Switching on headlamps” (
page 51)
and “Turn signals” (
page 51).
Exterior lamp switch
The exterior lamp switch is located on the
dashboard to the left of the steering wheel.
MOff
Daytime running lamp mode
(
page 108)
UAutomatic headlamp mode
Daytime running lamp mode
(page 108)
CParking lamps (also tail lamps,
license plate lamps, side marker
lamps, instrument panel lamps)BLow-beam headlamps or high-beam
headlamps
ˆStanding lamps, right
(turn left one stop)
‚Standing lamps, left
(turn left two stops)
CIndicator lamp for parking lamps
‡Indicator lamp for front fog lamps
†Indicator lamp for rear fog lamp
i
If you drive in countries where vehicles drive
on the other side of the road than the country
where the vehicle is registered, you must have
the headlamps modified for symmetrical low
beams. Relevant information can be obtained at
any authorized Mercedes-Benz Center.
i
If you hear a warning signal you have forgot-
ten to switch off the low-beam headlamps or the
parking lamps before opening the driver’s door.
In addition the message$
Lights Are
Still On
appears in the multifunction display.
Switch off the headlamps or the parking lamps.
If the message
Switch off lights or re-
move key.
appears in the multifunction display,
remove the SmartKey from the starter switch or
switch off the automatic headlamp mode.
!
Failure to switch off the headlamps when
leaving the vehicle may result in a discharged
battery.

112 Controls in detailLightingInterior lighting
The controls are located in the overhead
control panel.
1Left-hand reading lamp on/off
2Right-hand reading lamp on/off
3Interior lighting on/off
4Automatic control on/offAutomatic control
Deactivating

Slide switch4 to the right.
The interior lighting and the entry/exit
lamps remain switched off in darkness,
even when you

unlock the vehicle


open a door


remove the SmartKey from the
starter switchActivating

Slide switch 4 to the left.
Interior lamps switches on in darkness
when you

unlock the vehicle


open a door


remove the SmartKey from the
starter switch
In addition, the entry/exit lamps in the
door come on when you open a door.
The interior lighting switches off auto-
matically following a preset time delay.
For more information, see “Setting in-
terior lighting delayed switch-off”
(
page 137).
!
An interior lamp switched on manually does
not go out automatically.
Leaving an interior lamp switch in the ON posi-
tion for extended periods of time with the engine
turned off could result in a discharged battery.
i
The interior lighting is factory-set to
automatic mode.
i
If a door remains open, the interior lamps
switch off automatically after approximately
5minutes.

195 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. This feature makes
use of the residual heat produced by the
engine.Activating

Turn the SmartKey in the starter switch
to position1 or0 or remove it from the
starter switch.

Press button T (
page 186).
The indicator lamp on button comes
on.Deactivating

Press button T (
page 186).
The indicator lamp on button goes out.
The residual heat is automatically turned
off:


when the ignition is switched on


after about 30 minutes


if the battery voltage drops


if the coolant temperature is too low
i
How long the system will provide heating
depends on the coolant temperature and the
selected temperature. The blower will run at low
speed regardless of the air distribution control
setting.

359 Practical hints
Replacing SmartKey batteries
Replacing SmartKey batteries
If the batteries in the SmartKey are
discharged, 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.
Replacement batteries: Lithium, type
CR 2025 or equivalent.

Remove the mechanical key out of the
SmartKey (
page 357).
Warning!
G
Batteries contain poisonous and corrosive
substances. Therefore keep the batteries
out of reach of children.
If a battery is swallowed, seek medical help
immediately.
Warning!
G
SmartKey batteries contain perchlorate ma-
terial, which may require special handling
and regard for the environment. Check with
your local government’s disposal guidelines.
California residents, see
www.dtsc.ca.gov/HazardousWaste/Per-
chlorate/index.cfm.
i
When inserting the batteries, make sure
they are clean and free of lint.
i
When replacing batteries, always replace
both batteries. The required replacement batter-
ies are available at any Mercedes-Benz Center.

360 Practical hintsReplacing SmartKey batteries1Mechanical key
2Unlocking the battery compartment
3Removing the battery compartment
4Slide
Insert mechanical key1in side
opening, push gray slide4 in direction
of arrow2.
The battery compartment is unlatched.

Pull battery compartment out of the
housing in direction of arrow3.5Battery
6Contact spring

Remove the discharged batteries.

Using a lint-free cloth, insert new
batteries5 under the contact
spring6 with the plus (+) side facing
up.

Return battery compartment into
housing until it locks into place.

Slide mechanical key1 back into the
SmartKey.

Check the operation of the SmartKey.

371 Practical hints
Batteries
Charging the batteries
You can obtain detailed information on
charging the battery from your authorized
Mercedes-Benz Center.
Warning!
G
The brake system requires electrical power
to operate.
A malfunction in the vehicle’s power supply
or electrical system may impair brake sys-
tem operation and switch it into its emer-
gency operation mode. The same applies if
battery is disconnected. To brake, the driver
must then apply significantly greater brake
pedal pressure and depress the pedal much
further to obtain the expected braking ef-
fect. If necessary, apply full pressure to the
brake pedal. Brakes are only applied to the
front wheels. Stopping distance is
increased! Adjust your driving style
accordingly. For more information, see
“Electro-hydraulic brake system”
(page 87).
Warning!
G
With a disconnected battery

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


the gear selector lever will remain
locked in park positionP
Warning!
G
Never charge a battery while still installed in
the vehicle unless the battery charge unit
approved by Mercedes-Benz (supplied with
your vehicle) is being used. Gases may es-
cape during charging and cause explosions
that may result in paint damage, corrosion
or personal injury.
A battery charge unit specially adapted for
Mercedes-Benz vehicles and tested and
approved by Mercedes-Benz is available,
permitting the charging of the battery in its
installed position. Contact an authorized
Mercedes-Benz Center for information and
availability. Charge battery in accordance
with the separate operating instructions for
the battery charger.