101 Controls in detail
Locking and unlocking
Opening a door causes its windows to
open slightly. It will fully close when the
door is shut.
Warning!G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take it
with you, and lock the vehicle. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. It is possible
for children to open a locked door from the
inside, which could result in an accident
and/or serious personal injury.
!A side window will not work if it is blocked
with ice or if the battery needs charging. If you
cannot shut a door, do not force it or you could
damage the door or the side window. Fix whatev-
er is affecting the window before trying to shut
the door.
iUSA only:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the following
two conditions:
(1) This device may not cause harmful interfer-
ence, and
(2) this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
iCanada only:
This device complies with RSS-210 of Industry
Canada. Operation is subject to the following
two conditions:
(1) This device may not cause interference, and
(2) this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
iYou can also open and close the windows
(
page 253) and the tilt/sliding sunroof*
(
page 257) or the soft top (page 263) using
the SmartKey.
!If you can no longer lock or unlock the vehi-
cle with the SmartKey, then the batteries in the
SmartKey are discharged, the SmartKey is mal-
functioning or the vehicle battery is drained.
Check the batteries in the SmartKey
(
page 108) and replace them if necessary
(
page 441).
Use the mechanical key to unlock the driv-
er’s door (
page 427) and the trunk
(
page 428).
Use the mechanical key to lock the driver’s
door (
page 428) and the trunk
(
page 118).
Have the vehicle battery and the battery con-
nections checked (
page 464).
If the SmartKey is malfunctioning, contact
Roadside Assistance or an authorized
Mercedes-Benz Center.
104 Controls in detail
Locking and unlocking
SmartKey with KEYLESS-GO
1‹Lock button
2Š Opening button for trunk
(
page 108)
3Mechanical key locking tab
4Œ Unlock button
5Battery check lamp
6Â Panic button (
page 89)Opening a door causes its windows to
open slightly. It will fully close when the
door is shut.
!To prevent possible malfunction, avoid ex-
posing the SmartKey with KEYLESS-GO to high
levels of electromagnetic radiation.
Warning!G
When leaving the vehicle, always take the
SmartKey with KEYLESS-GO* 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.
!A side window will not work if it is blocked
with ice or if the battery needs charging. If you
cannot shut a door, do not force it or you could
damage the door or the side window. Fix whatev-
er is affecting the window before trying to shut
the door.
iUSA only:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the following
two conditions:
(1) This device may not cause harmful interfer-
ence, and
(2) this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
iCanada only:
This device complies with RSS-210 of Industry
Canada. Operation is subject to the following
two conditions:
(1) This device may not cause interference, and
(2) this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
110 Controls in detail
Locking and unlocking
Pull on door handle2.
If door was locked, locking knob1 will
move up.
Opening the trunk
You can open the trunk if the vehicle is sta-
tionary.
A minimum height clearance of 5.71 ft
(1.74 m) CLK coupe or 5.41 ft (1.65 m)
CLK cabriolet is required to open the
trunk lid.Opening the trunk from the outside
1Handle
Press and hold button Š on the
SmartKey or SmartKey with
KEYLESS-GO* until trunk unlocks and
begins to open.
or
Pull on handle1.
In vehicles without KEYLESS-GO*:
The vehicle must be unlocked.
The SmartKey with KEYLESS-GO* must be
inside the vehicle.
Pull an outside door handle.
The SmartKey with KEYLESS-GO* must be
within 3 ft (1 m) of the vehicle.
iIf you hear a warning signal you have
forgotten to switch off the low beam headlamps
or the parking lamps before opening the driver’s
door.
In addition the message
Switch Off Lights
appears in the multifunction display.
Switch off the low beam headlamps or the park-
ing 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 exterior lamps when
leaving the vehicle may result in a discharged
battery.
Warning!G
Make sure the trunk is closed when the en-
gine is running and while driving. Among
other dangers, such as blocked visibility, ex-
haust fumes may enter the vehicle interior.
These fumes are damaging to your health.
!The trunk lid swings open upwards automat-
ically. Always make sure there is sufficient over-
head clearance.
iIf the trunk does not open, it is still locked
separately (
page 118).
112 Controls in detail
Locking and unlocking
Closing the trunk
Closing the trunk from the inside
automatically*
In vehicles with trunk opening/closing sys-
tem* you can close the trunk from the in-
side using the remote trunk closing*
switch.
Press the remote trunk closing*
switch2 (
page 111) until the indi-
cator lamp in the switch goes out and
the trunk lid is closed.
To interrupt the closing procedure:
Release remote trunk closing*
switch2.If the trunk lid comes into contact with an
object while closing (e.g. luggage that has
been piled too high), in the sequence, the
upper motion the closing procedure is
stopped and the trunk reopens slightly.
iYou can also close the trunk by hand
(
page 113).
Warning!G
Maintain sight of trunk area while operating
the door mounted remote trunk closing*
switch. Monitor the closing procedure care-
fully to ensure that no one is in danger of be-
ing injured.
To interrupt the closing procedure, release
the door mounted remote trunk closing
switch.
Even with the SmartKey or the SmartKey
with KEYLESS-GO* removed from the start-
er switch or the SmartKey with
KEYLESS-GO* removed from the vehicle,
the remote trunk opening/closing* switch
can be operated. Therefore, do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. Unsuper-
vised use of vehicle equipment may cause
an accident and/or serious personal injury.
Warning!G
Only drive with the trunk closed as, among
other dangers such as blocked visibility,
exhaust fumes may enter the vehicle
interior.
113 Controls in detail
Locking and unlocking
Closing the trunk from the outside
manually
1Handle
2Handles
Lower trunk lid by pulling firmly on
handle1 or handles2.
Close trunk from the outside with
hands placed flat on the trunk lid.
Warning!G
To prevent possible personal injury, always
keep hands and fingers away from the trunk
lid opening when closing the trunk. Be espe-
cially careful when small children are
around.
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. It is possible for children
to open a locked door from the inside, which
could result in an accident and/or serious
personal injury.
Warning!G
Only drive with the trunk closed as, among
other dangers such as blocked visibility,
exhaust fumes may enter the vehicle
interior.
iDo not place the SmartKey in the open
trunk. You may lock yourself out.
Vehicles with KEYLESS-GO*:
To prevent a possible inadvertent lockout, the
trunk lid will open automatically if a SmartKey
with KEYLESS-GO* is recognized inside the vehi-
cle or in the trunk.
iIf the vehicle was previously centrally
locked, the trunk will lock automatically after
closing it (
page 112). All turn signal lamps
flash three times, and an acoustic signal sounds
three times, to confirm locking.
114 Controls in detail
Locking and unlocking
Closing the trunk from the outside
(vehicles without KEYLESS-GO*)
In vehicle with trunk opening/closing sys-
tem* you can close the trunk separately.
1Trunk closing switch
Press trunk closing switch1 briefly.
The trunk closes.
If the trunk lid comes into contact with an
object while closing (e.g. luggage that has
been piled too high), the closing procedure
is stopped and the trunk reopens slightly.
iYou can also close the trunk by hand
(
page 113).
Warning!G
Monitor the closing procedure carefully to
ensure that no one is in danger of being in-
jured. To prevent possible personal injury,
always keep hands and fingers away from
the trunk opening when closing the trunk.
Be especially careful when small children
are around. To stop the closing procedure,
do one of the following:
press trunk closing switch1
press the Š button on the SmartKey
press the remote trunk opening or clos-
ing switch (on driver’s door)
Even with the SmartKey removed from the
starter switch, the trunk closing switch can
be operated. Therefore, do not leave chil-
dren unattended in the vehicle, or with ac-
cess to an unlocked vehicle.Unsupervised
use of vehicle equipment may cause an ac-
cident and/or serious personal injury.
Warning!G
Only drive with the trunk closed as, among
other dangers such as blocked visibility,
exhaust fumes may enter the vehicle
interior.
iDo not place the SmartKey in the open
trunk. You may lock yourself out.
iIf the vehicle was previously centrally
locked, the trunk will lock automatically after
closing it (
page 112). All turn signal lamps
flash three times, and an acoustic signal sounds
three times, to confirm locking.
115 Controls in detail
Locking and unlocking
Closing the trunk from the outside
(vehicles with KEYLESS-GO*)
In vehicles with trunk opening/closing sys-
tem* you can close the trunk separately.
1Trunk closing switch
Make sure you have the SmartKey with
KEYLESS-GO with you.
Press trunk closing switch1 briefly.
The trunk closes.If the trunk lid comes into contact with an
object while closing (e.g. luggage that has
been piled too high), the closing procedure
is stopped and the trunk reopens slightly.
iYou can also close the trunk by hand
(
page 113).
iTo prevent a possible inadvertent lockout,
the trunk will open automatically if a SmartKey
with KEYLESS-GO is recognized inside the
vehicle or in the trunk.
Warning!G
Monitor the closing procedure carefully to
ensure that no one is in danger of being in-
jured. To prevent possible personal injury,
always keep hands and fingers away from
the trunk opening when closing the trunk.
Be especially careful when small children
are around. To stop the closing procedure,
do one of the following:
press trunk closing switch1
press KEYLESS-GO locking/closing
switch
press the remote trunk opening or clos-
ing switch (on driver’s door)
press the Š button on the SmartKey
with KEYLESS-GO
Even with the SmartKey with KEYLESS-GO
removed from the vehicle, the trunk closing
switch can be operated. Therefore, do not
leave children unattended in the vehicle, or
with access to an unlocked vehicle. Unsu-
pervised use of vehicle equipment may
cause an accident and/or serious personal
injury.
Warning!G
Only drive with the trunk closed as, among
other dangers such as blocked visibility,
exhaust fumes may enter the vehicle
interior.
iIf the vehicle was previously centrally
locked, the trunk will lock automatically after
closing it (
page 112). All turn signal lamps
flash three times, and an acoustic signal sounds
three times, to confirm locking.
116 Controls in detail
Locking and unlocking
Closing the trunk and locking the vehi-
cle from the outside (vehicles with
KEYLESS-GO*)
In vehicles with trunk opening/closing sys-
tem* and KEYLESS-GO, you can close the
trunk lid and lock the vehicle
simultaneously.
1KEYLESS-GO locking/closing switch
Make sure you have the SmartKey with
KEYLESS-GO with you.
Press switch1 briefly.
With all doors closed, the locking
knobs in the doors move down and the
trunk starts to close automatically. All turn signal lamps flash three times to
confirm locking once the trunk has
closed completely. The anti-theft alarm
system is armed.
If the trunk lid comes into contact with an
object while closing (e.g. luggage that has
been piled too high), the closing procedure
is stopped and the trunk reopens slightly.
iYou can also close the trunk by hand
(
page 113).
iTo prevent a possible inadvertent lockout,
the trunk will open automatically if a SmartKey
with KEYLESS-GO is recognized inside the vehi-
cle or in the trunk.
Warning!G
Monitor the closing procedure carefully to
ensure that no one is in danger of being in-
jured. To prevent possible personal injury,
always keep hands and fingers away from
the trunk opening when closing the trunk.
Be especially careful when small children
are around.
To stop the closing procedure, do one of the
following:
press KEYLESS-GO locking/closing
switch1
press trunk closing switch
press the Š button on the SmartKey
with KEYLESS-GO
press the remote trunk opening or clos-
ing switch (on driver’s door)
Even with the SmartKey with KEYLESS-GO
removed from the vehicle, the trunk closing
switch can be operated. Therefore, do not
leave children unattended in the vehicle, or
with access to an unlocked vehicle. Unsu-
pervised use of vehicle equipment may
cause an accident and/or serious personal
injury.
Warning!G
Only drive with the trunk closed as, among
other dangers such as blocked visibility, ex-
haust fumes may enter the vehicle interior.