2008 MERCEDES-BENZ C300 4MATIC buttons
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72 Controls in detail
Locking and unlocking
The vehicle will lock again automatically
and rearm the anti-theft alarm system
within approximately 40 seconds of un-
locking if:
neither a door nor the trunk is opened
the SmartKey is not inserted in the
starter switch
the central locking/unlocking switch is
not activated
Global locking: Press button‹.
With the trunk and doors closed:
All turn signal lamps flash three
times.
An acoustic signal sounds three
times.
The locking knobs in the doors
move down.
The anti-theft alarm system is
armed.Selective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey so that press-
ing buttonŒ only unlocks the driver’s
door and the fuel filler flap.
Press and hold buttonsŒ and‹
simultaneously for about 6 seconds un-
til battery check lamp5 (
page 70)
flashes twice.
The SmartKey will then function as fol-
lows:
Unlocking driver’s door and fuel fill-
er flap: Press buttonΠonce.
All turn signal lamps flash once.
An acoustic signal sounds once.
The locking knob in the driver’s
door moves up.
The anti-theft alarm system is dis-
armed.
The locator lighting will also come
on if it is dark and the feature is ac-
tivated in the control system
(
page 172).
Global unlocking: Press buttonŒ
twice.
All turn signal lamps flash once.
An acoustic signal sounds once.
The locking knobs in the doors
move up.
The anti-theft alarm system is dis-
armed.
The locator lighting will also come
on if it is dark and the feature is ac-
tivated in the control system
(
page 172).
Page 74 of 509
73 Controls in detail
Locking and unlocking
Global locking: Press button‹.
With the trunk and doors closed:
All turn signal lamps flash three
times.
An acoustic signal sounds three
times.
The locking knobs in the doors
move down.
The anti-theft alarm system is
armed.
Restoring to factory setting: Press
and hold buttonsŒ and‹ si-
multaneously for about 6 seconds until
battery check lamp5 (
page 70)
flashes twice.SmartKey with KEYLESS-GO*
(Canada only)
Vehicles equipped with KEYLESS-GO come
with two SmartKeys with KEYLESS-GO,
each with remote control and a removable
mechanical key.
The KEYLESS-GO function is integrated
into the SmartKey. On these vehicles, the
validity of the SmartKey with KEYLESS-GO
is checked every time you grasp an outside
door handle.
With the KEYLESS-GO function, you can
lock and unlock the vehicle without using
the remote control buttons on the
SmartKey and start the engine without in-
serting the SmartKey in the starter switch.
The SmartKey with KEYLESS-GO centrally
locks and unlocks, when set to factory set-
tings (
page 76):
the doors
the trunk
the fuel filler flap
SmartKey with KEYLESS-GO
1‹ Lock button
2ŠOpening button for trunk
(
page 269)
3Locking tab for mechanical key
4ΠUnlock button
5Battery check lamp
6ÂPanic button (
page 58)
iWhen any outside door handle other than
the driver’s outside door handle is grasped, the
vehicle is always centrally unlocked.
!To prevent possible malfunction, avoid ex-
posing the SmartKey with KEYLESS-GO to high
levels of electromagnetic radiation.
Page 78 of 509
77 Controls in detail
Locking and unlocking
Global unlocking: Grasp an outside
door handle1.
All turn signal lamps flash once.
An acoustic signal sounds once.
The locking knobs in the doors
move up.
The anti-theft alarm system is dis-
armed.
The locator lighting will also come
on if it is dark and the feature is ac-
tivated in the control system
(
page 172).
The vehicle will lock again automatically
and rearm the anti-theft alarm system
within approximately 40 seconds of un-
locking if:
neither a door nor the trunk is opened
the central locking/unlocking switch is
not activated
Global locking: Close all doors and
touch outside of door handle1. Do
not keep your hand in the door handle
recess.
With the trunk and doors closed:
All turn signal lamps flash three
times.
An acoustic signal sounds three
times.
The locking knobs in the doors
move down.
The anti-theft alarm system is
armed.Selective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey with
KEYLESS-GO so when you, grasp the driv-
er’s outside door handle only the driver’s
door and the fuel filler flap unlocks.
Press and hold buttonsŒ and‹
simultaneously for about 6 seconds un-
til battery check lamp5 (
page 73)
flashes twice.
The SmartKey with KEYLESS-GO will
then function as follows:
Unlocking driver’s door and fuel fill-
er flap: Grasp the driver’s outside door
handle.
All turn signal lamps flash once.
An acoustic signal sounds once.
The locking knob in the driver’s
door moves up.
The anti-theft alarm system is dis-
armed.
iThe vehicle could inadvertently be unlocked
if the SmartKey with KEYLESS-GO is within 3 ft
(1 m) of the vehicle and:
an outside door handle is splashed with wa-
ter, or
you attempt to clean an outside door handle.
iYou can also lock the vehicle using the
KEYLESS-GO lock button on trunk lid, if equipped
(
page 270).
Page 79 of 509
78 Controls in detail
Locking and unlocking
The locator lighting will also come
on if it is dark and the feature is ac-
tivated in the control system
(
page 172).
Global unlocking: Grasp any outside
door handle other than the driver’s out-
side door handle.
All turn signal lamps flash once.
An acoustic signal sounds once.
The locking knobs in the doors
move up.
The anti-theft alarm system is dis-
armed.
The locator lighting will also come
on if it is dark and the feature is ac-
tivated in the control system
(
page 172).
Global locking: Close all doors and
touch outside of a door handle1
(
page 76). Do not keep your hand in
the door handle recess.
With the trunk and doors closed:
All turn signal lamps flash three
times.
An acoustic signal sounds three
times.
The locking knobs in the doors
move down.
The anti-theft alarm system is
armed.
Restoring to factory setting: Press
and hold buttonsŒ and‹ si-
multaneously for about 6 seconds until
battery check lamp5 (
page 73)
flashes twice.Checking batteries in the SmartKey or
SmartKey with KEYLESS-GO*
(Canada only)
Press button‹ orŒ.
The battery check lamp (
page 70) or
(
page 73) comes on briefly to indi-
cate that the SmartKey or SmartKey
with KEYLESS-GO batteries are in or-
der.
iYou can also lock the vehicle using the
KEYLESS-GO lock button on trunk lid, if equipped
(
page 270).!If the battery check lamp does not come on
briefly during check, the SmartKey or SmartKey
with KEYLESS-GO batteries are discharged.
Replace the batteries (
page 428).
You can obtain the required batteries at any
authorized Mercedes-Benz Center.
iIf the batteries are checked within signal
range of the vehicle, pressing button‹ or
Πwill lock or unlock the vehicle accordingly.
Page 92 of 509
91 Controls in detail
Seats
Lumbar support
The curvature of the front seats can be ad-
justed to help enhance lower back support
and seating comfort.
1Adjustment lever
Move adjustment lever1 in direction
of arrows until you have reached a
comfortable seating position.
Seat heating*
The buttons for the front seats are located
in the center console. The red indicator
lamps on the button come on to show the
selected heating level.
1Seat heating buttonLevel
3Three indicator lamps on
(highest level)
The seat heating automatically
switches to level2 after approxi-
mately 5 minutes.
2Two indicator lamps on
The seat heating automatically
switches to level1 after approxi-
mately 10 minutes.
1One indicator lamp on
(lowest level)
The seat heating automatically
switches off after approximately
20 minutes.
offNo indicator lamp on
Page 104 of 509
103 Controls in detail
Memory function* (Canada only)
MMemory button
1 2 3Memory position buttons
Storing positions into memory*
Adjust the seat (page 85) to the de-
sired position.
On the driver’s side: Adjust the steering
wheel (
page 93) and the exterior rear
view mirrors (
page 97) to the desired
position.
Press memory buttonM.
Release memory buttonM and press
one of the memory position buttons
within 3 seconds.
An acoustic signal sounds to confirm.
The settings are stored with the select-
ed position.
Recalling positions from memory*
Press and hold memory position
button until the seat, steering wheel
and exterior rear view mirrors have
completely moved to the stored
positions.
iThe memory function* is operational at any
time. Seat and steering wheel adjustment is al-
ways possible.
!Do not operate the power seats using the
memory position button if the seat backrest is in
an excessively reclined position. Doing so could
cause damage to front or rear seats.
First move seat backrest to an upright position.
iReleasing the memory position button
immediately stops movement to the stored
positions.
Page 153 of 509
152 Controls in detail
Control system
Multifunction steering wheel
The displays in the multifunction display
and the settings in the control system are
controlled using the buttons on the multi-
function steering wheel.Item
1Multifunction display
Operating control system
2Volume control:
Press button
æto increase volume
çto decrease volume
Telephone*:
Press button
sto take a call
to dial a call
tto end a call
to reject an incoming call
Fto mute
3!to activate Voice Control*
Item
4Lto cancel Voice Control*,
back, confirm messages
5To call up line for menus and select
menus:
Press button
&to scroll to the right
(to scroll to the left
To select submenu or scroll through
lists:
Press button
$to scroll up
%to scroll down
Press button
#to confirm selection or
messages
iVoice Control* is only available with
COMAND*. Refer to separate operating instruc-
tions.
Page 154 of 509
153 Controls in detail
Control system
Depending on the selected menu
(
page 155), pressing the buttons on the
multifunction steering wheel will alter what
is shown in the multifunction display.
The information available in the multifunc-
tion display is arranged in menus, each
containing a number of functions or sub-
menus.
The individual functions are then found
within the relevant menu (radio or CD op-
erations under
Audio, for example). These
functions serve to call up relevant informa-
tion or to customize the settings for your
vehicle.
In the
Settings menu, instead of functions
you will find a number of submenus for
calling up and changing settings. For
instructions on using these submenus, see
“Submenus in the Settings menu”
(
page 166).
It is helpful to think of the menus, and the
functions within each menu, as being
arranged in a circular pattern.The number of menus available in the sys-
tem depends on which optional equipment
is installed in your vehicle.
Using the control system
To select a menu:
Press button(or&.
To select a submenu:
Press button%or$.
To go to the next higher menu level:
Press buttonL.
To select the standard display: Press
buttonL repeatedly until the stan-
dard display featuring the odometer
and speedometer appears.
or
Press and hold buttonL until the
standard display featuring the odome-
ter and speedometer appears.
To confirm selection:
Press button#.
To confirm display message:
Press button# or L.
The control system saves certain dis-
play messages. Calling up display mes-
sages (
page 164).
For information about warning and mal-
function messages appearing in the multi-
function display (
page 387).
iThe headings used in the menus table are
designed to facilitate navigation within the sys-
tem and are not necessarily identical to those
shown in the control system displays.
The first function displayed in each menu will au-
tomatically show you which part of the system
you are in.