MERCEDES-BENZ C350 4MATIC 2007 W203 Workshop Manual

50 Getting started
Driving
Switching on headlamps
Low beam headlamps
The exterior lamp switch is located on the
dashboard to the left of the steering wheel.
Exterior lamp switch
1Off
2Low beam headlamps on
Turn the exterior lamp switch to
positionB.
The low beam headlamps and the low
beam headlamp indicator lampB in
the instrument cluster comes on
(
page 24).High beam
The combination switch is located on the
left of the steering column.
Combination switch
1High beam
2High beam flasher
Push the combination switch in
direction of arrow1.
The high beam headlamps and the high
beam headlamp indicator lampA in
the instrument cluster comes on
(
page 24).
For more information on headlamps, see
“Lighting” (
page 109).
Turn signals
The combination switch is located on the
left of the steering column.
Combination switch
1Turn signals, right
2Turn signals, left
Press the combination switch in
direction of arrow1 or2.
The corresponding turn signal indicator
lampL orK in the instrument
cluster flashes (
page 24).
The combination switch resets
automatically after major steering
wheel movements.

51 Getting started
Driving
Windshield wipers
The combination switch is located on the
left of the steering column.
Combination switch
1Single wipe
Wiping with windshield washer fluid
2Switching on windshield wipers
Switch on the ignition (page 32).Switching on windshield wipers
Turn the combination switch to the
desired position depending on the
intensity of the rain.
0Windshield wipers off
IIntermittent wiping
IINormal wiper speed
IIIFast wiper speedIntermittent wiping
Vehicles with rain sensor*:
Intermittent wiping interval is dependent
on wetness of windshield.
Turn the combination switch to
positionI.
Vehicles with rain sensor*:
After the initial wipe, pauses between
wipes are automatically controlled by
the rain sensor.
iIf the combination switch is pressed to the
point of resistance and released, the
corresponding turn signals will flash three times.!Do not operate the windshield wipers when
the windshield is dry. Dust that accumulates on
a windshield might scratch the glass and/or
damage the wiper blades when wiping occurs on
a dry windshield. If it is necessary to operate the
windshield wipers in dry weather conditions, al-
ways operate the windshield wipers with wind-
shield washer fluid (
page 52).
!Vehicles with rain sensor*:
Do not leave windshield wipers in intermittent
setting when the vehicle is taken to an automatic
car wash or during windshield cleaning. Wind-
shield wipers will operate in the presence of wa-
ter sprayed on the windshield, and windshield
wipers may be damaged as a result.
!Vehicles with rain sensor*:
If you have set intermittent wiping, dirt on the
surface of the rain sensor or optical effects may
cause the windshield wipers to wipe in an undes-
ired fashion. This could then damage the wind-
shield wiper blades or scratch the windows. You
should therefore switch off the windshield wip-
ers when weather conditions are dry.

52 Getting started
Driving
Single wipe
Press the combination switch briefly in
direction of arrow1 to the resistance
point.
The windshield wipers wipe one time
without washer fluid.
Wiping with windshield washer fluid
Press the combination switch in direc-
tion of arrow1 past the resistance
point.
The windshield wipers operate with
washer fluid.
For information on filling up the washer
reservoir, see “Windshield washer system
and headlamp cleaning system*”
(
page 280).
iIntermittent wiping is interrupted when the
vehicle is at a standstill and a front door is
opened. This protects persons getting into or out
of the vehicle from being sprayed.
Intermittent wiping will be continued when

all doors are closed
and

the clutch pedal is depressed (vehicles with
manual transmission)
or

the gear selector lever is in positionD or R
(vehicles with automatic transmission*)
or

the wiper setting is changed using the com-
bination switch
iTo prevent smears on the windshield, or
noisy/chattering wiper blades, wipe with wind-
shield washer fluid every now and then even
when it is raining.
!If anything blocks the windshield wipers
(leaves, snow, etc.), switch them off immediate-
ly.

For safety reasons, stop the vehicle in a safe
location and remove SmartKey from starter
switch before attempting to remove any
blockage.

Remove blockage.

Turn the windshield wipers on again.
If the windshield wipers fail to function at all with
combination switch in positionI,

set the combination switch to the next high-
er wiper speed

have the windshield wipers checked at the
nearest authorized Mercedes-Benz Center

53 Getting started
Driving
Problems while driving
The engine runs erratically and misfires

An ignition cable may be damaged.

The engine electronics may not be op-
erating properly.

Unburned gasoline may have entered
the catalytic converter and damaged it.
Give very little gas.
Have the problem repaired by an au-
thorized Mercedes-Benz Center as
soon as possible.The coolant temperature is
above 248°F (120°C)
The coolant is too hot and is no longer
cooling the engine.
Stop the vehicle in a safe location as
soon as possible and turn off the en-
gine. Allow engine and coolant to cool
off.
Check the coolant level and add
coolant if necessary (
page 278).In case of accident
If the vehicle is leaking gasoline:
Do not start the engine under any cir-
cumstances.
Notify local fire and/or police authori-
ties.
If the extent of the damage cannot be de-
termined:
Notify an authorized Mercedes-Benz
Center.
If no damage can be determined on the

Major assemblies

Fuel system

Engine mount
Start the engine in the usual manner.

54 Getting started
Parking and locking
You have now completed your first drive.
You have properly stopped and parked
your vehicle. End your drive as follows.
Parking brake
Warning!G
Vehicles with manual transmission:
Wait until the vehicle is stationary before
removing the SmartKey from the starter
switch. The vehicle cannot be steered when
the SmartKey is removed.
Warning!G
With the engine not running, there is no
power assistance for the brake and steering
system. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the
vehicle.
Warning!G
Do not park this vehicle in areas where
combustible materials such as grass, hay or
leaves can come into contact with the hot
exhaust system, as these materials could be
ignited and cause a vehicle fire.
To reduce the risk of personal injury, or
damage to the vehicle or the vehicle
drivetrain, as a result of vehicle movement,
always do the following before turning off
the engine and leaving the vehicle:

Keep right foot on brake pedal.

Manual transmission: Move the gear-
shift lever into neutral position (no gear
is selected).

Firmly depress parking brake pedal.

Manual transmission: Move the gear-
shift lever into first or reverse gear.

Automatic transmission*: Move the
gear selector lever to positionP.

Slowly release brake pedal.

When parked on an incline, always turn
the front wheels towards the road curb.

Turn the SmartKey in the starter switch
to position0 and remove.

Take the SmartKey with you and lock
the vehicle when leaving, which could
endanger other road users when you en-
gage the parking brake.
Warning!G
Do not engage the parking brake while the
vehicle is in motion. Doing so can cause the
rear wheels to lock up. You could lose con-
trol of the vehicle and cause an accident. In
addition, the vehicle’s brake lights do not
light up when the parking brake is engaged,
which could endanger other road users.

55 Getting started
Parking and locking
1Release handle
2Parking brake pedal
Step firmly on parking brake pedal2.
When the engine is running, the brake
warning lamp; (USA only)
or3(Canada only) in the
instrument cluster comes on.
Switching off headlamps
Turn the exterior lamp switch toM
(
page 50).
For more information, see “Lighting”
(
page 109).
Turning off engine
Manual transmission: Move the gear-
shift lever into first or reverse gear.
Automatic transmission*: Place the
gear selector lever in positionP.
Apply the parking brake (page 54).
Turn the SmartKey in the starter switch
to position0 (
page 32).
Remove the SmartKey from the starter
switch.
The immobilizer is activated.
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. Children
could release the parking brake and/or
move the gear selector lever* from
positionP, either of which could result in an
accident and/or serious personal injury.
PositionP alone may not prevent your vehi-
cle from moving, possibly hitting people or
objects. Always set the parking brake in ad-
dition to shifting to positionP (
page 153)
(manual transmission: first or reverse gear
(
page 149)).
When parked on an incline, turn front wheel
towards the road curb.
Getting out of your vehicle without taking
the above measurements to secure it is
dangerous.
iAlways set the parking brake in addition to
shifting to positionP (manual transmission: first
or reverse gear).
On slopes, turn the front wheels towards the
road curb.
iVehicles with automatic transmission: The
SmartKey can only be removed from the starter
switch with the gear selector lever in positionP.

56 Getting started
Parking and locking
Releasing seat belts
Press the seat belt release button
(
page 44).
Allow the retractor to completely
rewind the seat belt by guiding the
latch plate.
Locking
Exit the vehicle and close all doors and
the trunk.
Press lock button‹ on the
SmartKey (
page 32).

All turn signal lamps flash three
times.

An acoustic signal sounds three
times.
For more information, see “Factory
setting” (
page 93).

The locking knobs in the doors
move down.

The anti-theft alarm system* is
armed.
For more information, see “Locking and
unlocking” (
page 92).
!Make sure the seat belt retracts fully so that
the seat belt and/or latch plate cannot get
caught or pinched in the door or in the seat
mechanism. This can damage the seat belt and
impair the effectiveness of the seat belt, and/or
cause damage to the door and/or door trim pan-
el. Such damage is not covered by the
Mercedes-Benz Limited Warranty.
Damaged seat belts must be replaced. Contact
an authorized Mercedes-Benz Center.
Warning!G
To prevent possible personal injury, always
keep hands and fingers away from the door
openings when closing the doors. Be espe-
cially careful when small children are
around.
Before closing doors, make sure there is no
possibility of someone getting caught in a
door during closing.
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. A child’s
unsupervised access to a vehicle could
result in an accident and/or serious
personal injury.
iIf you hear a warning signal you have
forgotten to switch off the headlamps before
opening the driver’s door.
In addition the message
Switch off lights
appears in the multifunction display.
Switch off the headlamps.

57 Safety and Security
Occupant safety
Panic alarm*
Driving safety systems
Anti-theft systems

58 Safety and Security
Occupant safety
In this section you will learn the most im-
portant facts about the restraint system
components of the vehicle.

Seat belts (page 69)

Child restraints (page 77)

Lower Anchors and Tethers for
CHildren (LATCH) (
page 79)
Additional protection potential provide

Supplemental Restraint System (SRS)
with

Air bags (page 59)

Air bag control unit (with crash
sensors)

Emergency tensioning device (ETD)
for seat belts (
page 72)

Active head restraints (page 73)Air bag system components with

Front passenger front air bag off
indicator lamp (
page 68)

Front passenger seat with Occupant
Classification System (OCS)
(
page 64)
Although independent systems, their pro-
tective effects work in conjunction with
each other.
The SRS system conducts a self-test when
the ignition is switched on and in regular
intervals while the engine is running. This
facilitates detection of system malfunc-
tions. The1indicator lamp in the in-
strument cluster comes on when the
ignition is switched on and goes out no lat-
er than a few seconds after the engine has
been started.The SRS components are in operational
readiness if the 1indicator lamp is not
lit when the engine is running.
A malfunction in the system has been
detected if the 1indicator lamp:
fails to go out after approximately
4 seconds after the engine was started

does not come on at all

comes on after the engine was started
or while driving.
iFor information on infants and children
traveling with you in the vehicle and restraint
systems for infants and children, see “Children
in the vehicle” (
page 74). Warning!G
Modifications to or work improperly con-
ducted on restraint systems (such as seat
belts and anchors, emergency tensioning
devices, seat belt force limiters or air bags)
or their wiring, as well as tampering with in-
terconnected electronic systems, can lead
to the restraint systems no longer function-
ing as intended.

59 Safety and Security
Occupant safety
Air bagsAir bags or emergency tensioning devices,
for example, could deploy inadvertently or
fail to deploy in accidents although the de-
celeration threshold for air bag deployment
is exceeded. Therefore, never modify the re-
straint systems. Do not tamper with elec-
tronic components or their software.
Warning!G
In the event that the 1 indicator lamp
comes on during driving or does not come
on at all, the SRS self-check has detected a
malfunction. For your safety, we strongly
recommend that you visit an authorized
Mercedes-Benz Center immediately to have
the system checked; otherwise the SRS may
not deploy when needed in an accident,
which could result in serious or fatal injury,
or it might deploy unexpectedly and unnec-
essarily which could also result in injury.
In addition, improper repair work on the SRS
creates a risk of rendering the SRS inopera-
tive or causing unintended air bag deploy-
ment. Work on the SRS must therefore only
be performed by qualified technicians. Con-
tact an authorized Mercedes-Benz Center.
If it is necessary to modify an air bag system
to accommodate a person with disabilities,
contact your local authorized
Mercedes-Benz Center or call our Customer
Assistance Center at 1-800-FOR-MERCedes
(1-800-367-6372) for details.
Warning!G
Air bags are designed to reduce the poten-
tial of injury and fatality in certain frontal im-
pacts (front air bags) or side impacts (front
side impact air bags, rear side impact
air bags* and window curtain air bags).
However, no system available today can to-
tally eliminate injuries and fatalities.
The deployment of the air bags temporarily
releases a small amount of dust from the air
bags. This dust, however, is neither injurious
to your health, nor does it indicate a fire in
the vehicle. The dust might cause some tem-
porary breathing difficulty for people with
asthma or other breathing trouble. To avoid
this, you may wish to get out of the vehicle
as soon as it is safe to do so. If you have any
breathing difficulty but cannot get out of the
vehicle after the air bag inflates, then get
fresh air by opening a window or door.