2008 MERCEDES-BENZ C300 4MATIC engine

161 Controls in detail
Control system
Switch on the telephone and audio sys-
tem.
Activate and register the telephone
(
page 225).
Press ( or & to select the Tel
menu.
Which messages will appear in the
multifunction display depends on whether
your telephone is switched on or off:

If the Bluetooth® function on the audio
system is disabled, the message
Blue-
tooth not activated in system set-
tings
appears. To enable Bluetooth®
(
page 193).

If the telephone is switched on, the
telephone will then search for a net-
work. During this time, the message
No
Service
appears in the multifunction
display. If no network available, the
multifunction display message
No Ser-
vice
is shown continuously.

If the telephone is on, as soon as the
telephone has found a network,
Phone
Ready
appears in the multifunction dis-
play.This standby message indicates that your
telephone is ready for use and you can
operate it using the control system.
You may carry out the following functions:
Otherwise, you may not be able to observe
traffic conditions and could endanger your-
self and others.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is
covering a distance of 44 feet
(approximately 14 m) every second.
Warning!G
Never operate radio transmitters equipped
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna)
from inside the vehicle while the engine is
running. Doing so could lead to a malfunc-
tion of the vehicle’s electronic system,
possibly resulting in an accident and
personal injury.FunctionPage
Dialing a number from the phone
book162
Redialing163
Answering a call163
Ending a call or rejecting an in-
coming call163

172 Controls in detail
Control system
Depending on the previous status, the
daytime running lamps feature will be
Enabled orDisabled.
With
Daytime Running Lamps mode En-
abled
selected and the exterior lamp
switch at position M or *, the low
beam headlamps are switched on when
the engine is running.
In low ambient light conditions the follow-
ing lamps will switch on additionally:

Parking lamps

Tail lamps

License plate lamps

Side marker lamps
also illuminates the instrument cluster.
For more information on the daytime run-
ning lamp mode (
page 110).Setting locator lighting
Press % or $ to select the
Lights submenu.
Press #.
Press % or $ to select the Sur-
round Lighting
feature.
Press #.
The current setting
Enabled
or
Disabled is shown.
Press # again if you would like to
change the current status.
Depending on the previous status, the
locator lighting feature will be
Enabled
or
Disabled.
With the locator lighting feature activated
and the exterior lamp switch in
positionU, the following lamps will
switch on during darkness when the vehi-
cle is unlocked with the SmartKey:

Parking lamps

Tail lamps

License plate lamps

Side marker lamps

Front fog lamps
also illuminates the instrument cluster.
iIf you turn the exterior lamp switch to anoth-
er position, the corresponding lamp(s) will
switch on.
iMake sure the light switch is set toB
or* when you switch off the daytime running
lamps while driving at night.
iFor safety reasons, resetting the Lights
submenu to factory settings (
page 165) while
driving will not deactivate the daytime running
lamp mode.
The following message appears in the
multifunction display:
Lighting - Cannot be completely reset
to factory settings while driving.


191 Controls in detail
Audio system
Adjusting surround sound
With surround sound, you can choose be-
tween
LOGIC7® On and LOGIC7® Off.
Select Sound
Sound.
A dot R indicates the current setting.
To select a setting: Slidermq or
rotateymz.
To save setting: Press n.
The setting is stored and the menu is
exited.
To exit menu without saving: Press
button í or slideomp.
iThe LOGIC7® On function of the
harman/kardon LOGIC7® Surround Sound sys-
tem permits the playback of discrete 5.1 and ste-
reo recordings with an optimal surround sound
platform for each passenger.
The LOGIC7
® distributes the 5.1 surround infor-
mation over the 13-channel system architecture
to provide the optimum sound experience from
all seats. This produces the sound characteristic
as intended by the sound engineer during the
original recording.
Harman/kardon LOGIC7
® converts all two-chan-
nel stereo sound material into multi-channel sur-
round sound. The surround information stored
during the original recording is read out using
LOGIC7
® and likewise distributed over the
13 channels. No effects are created during this
process; only that which was already there be-
comes audible.
In addition, harman/kardon LOGIC7
® moves the
perceived sound source away from the individual
loudspeakers, thus generating a natural 360°
sound experience for each passenger.
iBy selecting LOGIC7® Off, all compatible
formats are played back as they are present on
the medium. Due to the vehicle’s spatial charac-
teristics, an optimal sound experience is not en-
sured from all seats.
iBalance and fader will be set to the default
value (0/0) automatically by activating or deacti-
vating LOGIC7
®.
iPlease note the following:

For an optimal sound experience from all
seats, the balance and fader should be ad-
justed to the center of the passenger com-
partment with LOGIC7
® switched on.

The best sound results are achieved when
playing high-quality audio CDs.

For MP3 tracks, the bit rate should be at
least 128 kbit/s.

Surround playback cannot be activated in
mono-signal sources as AM or Weatherband.
It will not function for mono-signal sources
as, e.g. mono audio tracks on some specific
audio CDs.

In the case of poor radio reception quality,
e.g. in tunnels, LOGIC7® should be switched
off, as otherwise a dynamic switchover from
stereo to mono and thus temporary sound
characteristic shifts can occur.

With certain stereo recordings, the resulting
sound characteristic may deviate from con-
ventional stereo playback.

222 Controls in detail
Audio system
Telephone*
Safety precautionsWhen the telephone is connected via the
Bluetooth® interface to the audio system,
you can operate the telephone using the
following devices:

audio system (page 237)

Audio controller

Audio control unit

buttonss andt on the multi-
function steering wheel (
page 152)

mobile phone keypad
Please note that these functions are only
available with Mercedes-Benz approved
telephones.
Warning!G
Some jurisdictions prohibit the driver from
using a cellular telephone while driving.
Whether or not prohibited by law, for safety
reasons, the driver should not use the cellu-
lar telephone while the vehicle is in motion.
Stop the vehicle in a safe location before
placing or answering a call.
If you nonetheless choose to use the tele-
phone
1 while driving, please use the hands-
free device and be sure to pay attention to
the traffic situation at all times. Use the tele-
phone only when road, weather and traffic
conditions permit. Otherwise, you may not
be able to observe traffic conditions and
could endanger yourself and others.
1Observe all legal requirements.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is
covering a distance of 44 feet (approxi-
mately 14 m) every second.
Warning!G
Never operate radio transmitters equipped
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna)
from inside the vehicle while the engine is
running. Doing so could lead to a malfunc-
tion of the vehicle’s electronic system, pos-
sibly resulting in an accident and/or
personal injury.
iThe functions and services available to you
while using the telephone depend on your ser-
vice provider and the type of telephone you are
using. See also separate operating manual for in-
structions on how to use your telephone.

243 Controls in detail
Driving systems
1SegmentsCanceling cruise control
There are several ways to cancel the cruise
control:
Step on the brake pedal.
The cruise control is canceled. The last
speed set is stored for later use.
or
Briefly push the cruise control lever in
direction of arrow3 (
page 242).
The cruise control is canceled. The last
speed set is stored for later use.
iOn uphill grades, the cruise control may not
be able to maintain the set speed. Once the
grade eases, the set speed will be resumed.
On downhill grades, the cruise control maintains
the set speed by braking with the vehicle’s
braking system. In addition, on longer downhill
grades the automatic transmission* will down-
shift automatically.
iVehicles with manual transmission:
If you depress the clutch pedal when shifting into
another gear, the engine speed may increase.

Always drive at sufficient, but not excessive,
engine speed.

Shift gear in a timely manner.

Avoid shifting down more than one gear if at
all possible.
iThe last stored set speed is canceled when
the engine is turned off.
iThe cruise control switches off
automatically and the segments in the multifunc-
tion display go out when

you step on the brake pedal.

you press the parking brake pedal.
The cruise control switches off automatically,
the segments in the multifunction display go out
and an acoustic warning sounds when

the vehicle speed is below 20 mph
(30 km/h).

the ESP® is in operation or switched off with
the ESP® switch (page 63).

Vehicles with manual transmission:
you engage neutral or depress the clutch
pedal for more than 6 seconds during shift-
ing into another gear.

Vehicles with automatic transmission*:
you move the gear selector lever to
positionN while driving.
Observe additional messages in the
multifunction display that may appear.

245 Controls in detail
Driving systems
Setting a lower speed
You can reduce the set speed in two ways.Adjustment in 1 mph (Canada: 1 km/h)
increments
Briefly press the cruise control lever
down to the resistance point in direc-
tion of arrow2 (
page 242).
Release the cruise control lever.
The vehicle set speed decreases in in-
crements 1 mph (Canada: 1 km/h).
Adjustment in 5 mph
(Canada: 10 km/h) increments
Briefly press the cruise control lever
down past the resistance point in
direction of arrow2 (
page 242).
Release the cruise control lever.
The vehicle set speed decreases in in-
crements 5 mph (Canada: 10 km/h).
Setting to last stored speed
(“Resume” function)
Warning!G
If you decrease the set vehicle speed, keep
in mind that it may take a brief moment until
the vehicle has the vehicle has reached the
set speed.
Decelerate the set vehicle speed to a value
that the prevailing road conditions and legal
speed limits permit. Otherwise, sudden and
unexpected deceleration of the vehicle
could cause an accident and/or serious in-
jury to you and others.
iWhen you use the cruise control lever to de-
celerate, the brake system will automatically
brake the vehicle if the engine’s braking power
does not brake the vehicle sufficiently.
iThe set speed value is decreased in 1 mph
(Canada: 1 km/h) increments each time you
press the cruise control lever down to the resis-
tance point.
iThe set speed value is decreased in 5 mph
(Canada: 10 km/h) increments each time you
press the cruise control lever down past the re-
sistance point.
iThe new speed is set and the vehicle will de-
celerate. Keep in mind that it may take a brief
moment until the vehicle has reached the set
speed.
Warning!G
The set speed stored in memory should only
be set again if prevailing road conditions
permit. Possible acceleration or decelera-
tion differences arising from returning to the
preset speed could cause an accident
and/or serious injury to you and others.

246 Controls in detail
Driving systems
Briefly pull the cruise control lever in
the direction of arrow4 (
page 242).
The cruise control resumes to the last
set speed or if no speed is stored, it will
set and store the current speed.
Remove your foot from the accelerator
pedal.
The last set speed appears in the multi-
function display for approximately
5 seconds, and the corresponding
speedometer segments from the se-
lected speed to the vehicle maximum
speed are illuminated.
Hill start assist system
On uphill grades with a gradient angle of
more than 5°, the hill start assist system
maintains the pressure in the brake sys-
tem for approximately 1 second after you
have released the brake pedal. Therefore,
you can start off smoothly without the
vehicle moving immediately after releasing
the brake pedal.
Depress the brake pedal
Manual transmission: Engage for-
ward or reverse gear.
Slowly release the clutch pedal, remov-
ing your foot from the brake pedal at
the same time, and carefully depress
the accelerator pedal.
Automatic transmission*: Move the
gear selector lever to position Dor R.
Remove your foot from the brake pedal
and carefully depress the accelerator
pedal.
The hill start assist system is inactive

when starting off on a level road or
downhill grades

vehicles with automatic transmission*
with the gear selector lever in
positionN

with the parking brake depressed

if the ESP® has switched off due to a
malfunction
iThe last stored set speed is deleted when
the engine is turned off.
Warning!G
The hill start assist system is not designed
to function as an parking brake and does not
prevent the vehicle from moving when
parked on an incline.
Always depress the parking brake in
addition to shifting to park positionP.
iWhen you remove your foot from the accel-
erator, the vehicle will remain stationary for ap-
prox. 1 second.

251 Controls in detail
Dual-zone automatic climate control
The dual-zone automatic climate control is
operational whenever the engine is run-
ning. You can operate the dual-zone auto-
matic climate control system in either the
automatic or manual mode. The system
cools or heats the interior depending on
the selected interior temperature and the
current outside temperature.
It can only function optimally when you are
driving with the windows and the tilt/slid-
ing sunroof/panorama sunroof* closed.
Nearly all dust particles, pollutants and
odors are filtered out before outside air en-
ters the passenger compartment through
the air distribution system.The air conditioning will not engage (no
cooling) if the A/C mode is deactivated
(
page 258).
Warning!G
When operating the climate control, the air
that enters the passenger compartment
through the air vents can be very hot or very
cold (depending on the set temperature).
This may cause burns or frostbite on unpro-
tected skin in the immediate area of the air
vents. Always keep sufficient distance be-
tween unprotected parts of the body and the
air vents. If necessary, use the air distribu-
tion control (
page 248) to direct the air to
air vents in the vehicle interior that are not
in the immediate area of unprotected skin.
Warning!G
Severe conditions (e.g. strong air pollution)
may require replacement of the filter before
its scheduled interval. A clogged filter will
reduce the air volume to the interior and the
windows could fog up, impairing visibility
and endangering you and others. Have a
clogged filter replaced as soon as possible
at an authorized Mercedes-Benz Center.
Warning!G
Follow the recommended settings for heat-
ing and cooling given on the following pag-
es. Otherwise the windows could fog up,
impairing visibility and endangering you and
others.