2007 MERCEDES-BENZ CLK350 Starting

81 Safety and Security
Occupant safety
Roll bars
The roll bars are integrated into the rear
head restraints.
The roll bars raise automatically in an acci-
dent or in a critical driving situation.
You can manually lower the roll bars again
when the soft top is open (
page 414).
With the soft top closed, contact an autho-
rized Mercedes-Benz Center to have the
roll bars lowered. Do not attempt to lower
the roll bars manually with the soft top closed. Lowering the roll bars manually
with the soft top closed may impair the
function of the roll bars.
Warning!G
Make sure nothing is blocking the roll bars’
path of motion. Otherwise someone could
be injured when the roll bars are raised. The
head restraints should therefore always be
in the raised position when the rear seat is
occupied (
page 120).
iWhen the roll bars are raised automatically,
you will hear a ratcheting sound and the rear
head restraints will also rise.
iYou cannot lower the rear head restraints
with the rear head restraint lowering switch
(
page 120) when the roll bars are in the raised
position.
Also, you cannot operate the soft top using the
soft top switch when the roll bars are in the
raised position.

If the soft top is open, you can manually low-
er the roll bars (
page 414).

If the soft top is closed, contact an autho-
rized Mercedes-Benz Center to have the roll
bars lowered.
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 (
page 413).
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.

95 Safety and Security
Anti-theft systems
Anti-theft systems
Immobilizer
The immobilizer prevents unauthorized
persons from starting your vehicle.
Activating
With the SmartKey
Remove the SmartKey from the starter
switch.
With KEYLESS-GO*
Turn off the engine by means of the
start/stop button (
page 37) on the
gear selector lever.
Open the driver’s door.
Deactivating
With the SmartKey
Insert the SmartKey in the starter
switch.With KEYLESS-GO*
Switch on the ignition (page 38).
Anti-theft alarm system
Once the alarm system has been armed, a
visual and audible alarm is triggered when
someone opens

a door

the trunk

the hood.
The alarm will stay on even if the activating
element (e.g. a door) is immediately
closed.The alarm system will also be triggered
when

the vehicle is opened with the
mechanical key.

someone opens a door from the inside.

someone opens the trunk with the
emergency release button.
iStarting the engine will also deactivate the
immobilizer.
In case the engine cannot be started (yet the ve-
hicle’s battery is charged), the system is not op-
erational. Contact an authorized Mercedes-Benz
Center or call
1-800-FOR-MERCedes (in the USA), or
1-800-387-0100 (in Canada).
iIf the alarm stays on for more than
30 seconds, a call to the Response Center is ini-
tiated automatically by the Tele Aid system
(
page 287) provided Tele Aid service was sub-
scribed to and properly activated, and that nec-
essary cellular service and GPS coverage are
available.

118 Controls in detail
Locking and unlocking
Locking and unlocking from the inside
You can lock or unlock the doors and the
trunk from inside using the central locking
or unlocking switch. This can be useful, for
example, if you want to lock the vehicle
before starting to drive.
You cannot lock or unlock the fuel filler flap
with the central locking or unlocking
switch.The switches are located in the center
console.
1Central locking switch
2Central unlocking switch
Locking
Press central locking switch1.
If both doors are closed, the vehicle
locks.
Unlocking
Press central unlocking switch2.
The vehicle unlocks.
Warning!G
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
from the starter switch, take it with you, and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. A child’s unsupervised ac-
cess to a vehicle could result in an accident
and/or serious personal injury.
iYou can open a locked door from the inside.
Open door only when conditions are safe to do
so.
If the vehicle was previously centrally locked
with the SmartKey or the SmartKey with
KEYLESS-GO*, it will not unlock using the central
unlocking switch2.
If the vehicle was previously locked with the cen-
tral locking switch1

while in the selective remote control mode,
only the door opened from inside is un-
locked.

while in the global remote control mode, the
complete vehicle is unlocked when a door is
opened from the inside.

147 Controls in detail
Control system
1Gear indicator
2RACETIMER
3Lap
Starting the RACETIMER
Press buttonæ.
The timer starts.
Displaying intermediate time
Press buttonç while the timer is
running. The intermediate time is shown for
5 seconds.
Stopping the RACETIMER
Press buttonæ.
The timer stops.Saving lap time and starting a new lap
Press buttonç while the timer is
running.
The intermediate time is shown for
5 seconds.
Press buttonç within the next
5 seconds.
The intermediate time shown will be
saved as a lap time.
The RACETIMER begins timing the new
lap. The new lap begins to be timed as
soon as the intermediate time is called
up.
iYou can start the RACETIMER when the
engine is running or the starter switch is in
position2 (
page 36).
iWhile the RACETIMER is being displayed,
you can not adjust the volume using buttonæ
orç.
iWhen you stop the vehicle and turn the
SmartKey to position1 (
page 36) or, in vehi-
cles with KEYLESS-GO*, turn off the engine and
do not open the driver’s door, the RACETIMER
stops timing. Timing is resumed when you switch
the ignition back on (
page 36) or restart the
engine (
page 50) and then press
theæbutton.
iYou can save up to 9 laps.


183 Controls in detail
Automatic transmission
Downshifting
Briefly press the gear selector lever to
the left in theD-direction.
or
Briefly pull left shift paddle1
(
page 179).
The transmission shifts to the next
lower gear.Kickdown
Using the kickdown when driving in the
manual program modeM is not possible.
Deactivating manual shift program
Press the program mode selector
switch (
page 181) repeatedly
until
CorS appears in the multifunction
display.
or
Restart the engine.
The transmission will go to the
automatic program mode (C orS).
The manual program modeM is not
stored.Emergency operation
(Limp-Home Mode)
If vehicle acceleration becomes less re-
sponsive or sluggish or the transmission
no longer shifts, the transmission is most
likely operating in limp-home (emergency
operation) mode. In this mode only second
gear and reverse gear can be selected.
Stop the vehicle in a safe location.
Move the gear selector lever to park
positionP.
Turn off the engine.
Wait at least 10 seconds before
restarting.
Restart the engine.
Move the gear selector lever to
positionD (for second gear) or
positionR.
Have the transmission checked at an
authorized Mercedes-Benz Center as
soon as possible.
Warning!G
On slippery road surfaces, never downshift
in order to obtain braking action. This could
result in drive wheel slip and reduced
vehicle control. Your vehicle’s ABS will not
prevent this type of loss of control.
iWhen you brake or stop, the transmission
shifts down to a gear from which you can easily
accelerate or take off.

192 Controls in detail
Climate control
Setting the temperature
Use temperature controls2 and3
(
page 189) to separately adjust the air
temperature on each side of the passenger
compartment. You should raise or lower
the temperature setting in small incre-
ments, preferably starting at 72°F (22°C).
The climate control will adjust to the set
temperature as fast as possible.
Increasing
Turn temperature control2
and/or3 (
page 189) slightly clock-
wise.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.Decreasing
Turn temperature control2
and/or3 (
page 189) slightly coun-
terclockwise.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.
Adjusting air distribution
Use air distribution control4
(
page 189) to adjust the air distribution.
The following symbols are located on the
controls:
iIf you turn the temperature control fully
clockwise for one side of the vehicle, you are in-
creasing the temperature for the other side of
the vehicle as well.
iIf you turn the temperature control fully
counterclockwise for one side of the vehicle, you
are decreasing the temperature for the other
side of the vehicle as well.
SymbolFunction
aDirects air through the center,
side and rear passenger
compartment air vents
ZDirects air to the windshield
and the side defroster vents
bDirects air into the entire
vehicle interior
YDirects air to the footwells

202 Controls in detail
Automatic climate control
Setting the temperature
Use temperature controls3 andd for
the left side or6 andb for the right side
(
page 199) to separately adjust the air
temperature on each side of the passenger
compartment. You should raise or lower
the temperature setting in small incre-
ments, preferably starting at 72°F (22°C).
The automatic climate control will adjust
to the set temperature as fast as possible.Increasing
Press and hold temperature button3
and/or6 (
page 199) until the de-
sired temperature appears in the
display4 (
page 199).
The automatic climate control system
will correspondingly adjust the interior
air temperature.Decreasing
Press and hold temperature buttonb
and/ord (
page 199) until the de-
sired temperature appears in the
display4 (
page 199).
The automatic climate control system
will correspondingly adjust the interior
air temperature.
iIf you increase the temperature for one side
of the vehicle to the highest adjustable value
then you will see the message
HI in the display.
This also increases the temperature for the other
side of the vehicle.
iIf you decrease the temperature for one side
of the vehicle to the lowest adjustable value then
you will see the message
LO in the display. This
also decreases the temperature for the other
side of the vehicle.

219 Controls in detail
Audio system
Direct frequency input
Select desired waveband.
Press * button.
Enter desired frequency with buttons
1to R.Manual tuning
Select desired waveband.
Press S or Tbutton for approx.
three seconds.
Press button repeatedly until desired
frequency has been reached.
Step-by-step station tuning takes place
in ascending or descending order. Each
time the button is pressed, the radio
tunes further by 0.2 mHz. During man-
ual tuning, the radio is muted.
Automatic seek tuning
Select desired waveband.
Press S or T button briefly.
The radio will tune to the next highest
or next lowest receivable frequency.Scan search

Starting scan search
Select desired waveband.
Press SC soft key.
SC will appear in the display. The ra-
dio briefly tunes in all receivable
stations on the waveband selected.

Ending scan search
Press SC soft key or S or T.
The station last played will be se-
lected and
SC disappears from the
display.
iYou can only enter frequencies within the re-
spective waveband.
If a button is not pressed within four seconds,
the radio will return to the last station tuned.
iIf no station is received after two
consecutive scans of the complete frequency
range, then the scan stops at the frequency from
which it began.