reset MERCEDES-BENZ CLK320 CABRIOLET 2003 C208 Owner's Manual

36 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Lower trunk lid using handle (1) and close it with hands
placed flat on trunk lid. Please remember to keep your
fingers out of the space between the lid and the vehicle.Trunk lamp
If the trunk is to remain open for a long period of time,
the trunk lamp can be switched off by pulling out the
plunger in the switch (arrow). This prevents the vehicle
battery from being discharged.
When the trunk lid is closed, the switch will reset and
turn on the lamp next time the lid is opened.
P88.50-2009-26
1
P82.20-2029-26

57 Restraint systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Caution!
For safety reasons, avoid adjusting the seat or backrest
into positions which could affect the correct seat belt
position.
Wa r n i n g !
USE SEAT BELTS PROPERLY.• Seat belts can only work when used properly.
Never wear seat belts in any other way than as
described in this section, as that could result
in serious injuries in case of an accident.• E ach oc c upan t s houl d wear t hei r s ea t bel t a t al l
times, because seat belts help reduce the
likelihood of and potential severity of injuries
in accidents, including rollovers. The
integrated restraint system includes SRS
(driver airbag, front passenger airbag, door
mounted side impact airbags), ETD (seat belt
emergency tensioning devices), and front seat
knee bolsters. The system is designed to
enhance the protection offered to properly
belted occupants in certain frontal (front
airbags) and side (side impact airbags) impacts
which exceed preset deployment thresholds.
• Never wear belts over rigid or breakable
objects in or on your clothing, such as
eyeglasses, pens, keys etc., as these might
cause injuries.• Never wear the shoulder belt under your arm,
against your neck or off your shoulder. In a
crash, your body would move too far forward.
That would increase the chance of head and
neck injuries. The belt would also apply too
much force to the ribs or abdomen, which
could severely injure internal organs such as
your liver or spleen.• Position the lap belt as low as possible on your
hips and not across the abdomen. If the belt is
positioned across your abdomen, it could cause
serious injuries in a crash.• Each seat belt should never be used for more
than one person at a time. Do not fasten a seat
belt around a person and another person or
other objects.• Belts should not be worn twisted. In a crash,
you wouldn’t have the full width of the belt to
manage impact forces. The twisted belt against
your body could cause injuries.

60 Restraint systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Supplemental restraint system (SRS)
Airbags are intended as a supplement to seat belts.
Airbags alone cannot protect as well as airbags plus
seat belts in impacts for which the airbags were
designed to operate, and do not afford any protection
whatsoever in crashes for which the airbags are not
designed to deploy.
The SRS uses two crash severity levels (thresholds) to
activate either the Emergency tensioning device or front
airbag or both. Activation depends on the direction and
severity of the impact exceeding the preset thresholds
and whether the seat belt is fastened.
Seat belt fastened
•first threshold exceeded: ETD activates
•second threshold exceeded: airbag also activates
Seat belt not fastened
•first threshold exceeded:
airbag activates, but not ETD
Driver and front passenger systems operate
independently of each other.Emergency tensioning device (ETD)
The seat belts for the front seats are equipped with
Emergency tensioning devices. These tensioning
devices are located in each belt’s inertia reel and
become operationally ready with the electronic key in
steering lock position 1 or 2.
The Emergency tensioning devices are designed to
activate only when the seat belts are fastened during
frontal impacts exceeding the first threshold of the SRS
and in rear impacts exceeding a preset severity level.
They remove slack from the belts in such a way that the
seat belts fit more snugly against the body restricting its
forward Emergency tensioning device movement as
much as possible.
In cases of other frontal impacts, angled impacts,
roll-overs, certain side impacts, or other accidents
without sufficient frontal or rear impact forces, the
Emergency tensioning device will not be activated. The
driver and passengers will then be protected by the
fastened seat belts and inertia reel in the usual manner.
For seat belt and Emergency tensioning device safety
guidelines see page 67.

62 Restraint systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
3Side impact airbag
The side impact airbags are located in the doors.
The most effective occupant restraint system yet
developed for use in production vehicles is the seat belt.
In some cases, however, the protective effect of a seat
belt can be further enhanced by an airbag.
In conjunction with wearing the seat belts, the driver
and front passenger airbags can provide increased
protection for the driver and front passenger in certain
frontal impacts exceeding preset thresholds. Door mounted side impact airbags can provide increased
protection to belted front passengers on the impacted
side of the vehicle in side impacts exceeding its preset
threshold.
Important!
The operational readiness of the airbag system is
verified by the indicator lamp SRS in the instrument
cluster when turning the electronic key in steering lock
to position 1 or 2. If no fault is detected, the lamp will go
out after approximately 4 seconds; after the lamp goes
out, the system continues to monitor the components
and circuitry of the airbag system and will indicate a
malfunction by coming on again. If the lamp does not
come on at all or if it fails to extinguish after
approximately 4 seconds or if it comes on thereafter,
a malfunction in the system has been detected.
The following system components are monitored or
undergo a self-check: crash-sensor(s), airbag ignition
circuits, front seat belt buckles, Emergency tensioning
devices, seat sensor.
3
P91.60-2122-26

63 Restraint systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Initially, when the electronic key is turned from steering
lock position 0 to positions 1 or 2, malfunctions in the
crash-sensor are detected and indicated (the SRS
indicator lamp stays on longer than 4 seconds or does
not come on).
Have the system checked at your authorized
Mercedes-Benz Center immediately.
In the operational mode, after the indicator lamp has
gone out following the initial check, interruptions or
short circuits in the airbag ignition circuit and in the
driver and front passenger seat belt buckle harnesses,
and low voltage in the entire system are detected and
indicated.Front airbags
The driver and front passenger front airbags are
designed to activate only in certain frontal impacts
exceeding a preset threshold.
The front passenger airbag deploys only if the front
passenger seat is occupied and the indicator lamp on
the center console is not illuminated.
Note:
Objects heavier than 20 lbs (9 kg) on the front
passenger seat can appear to the SRS to indicate the
presence of an occupant in that seat which causes the
passenger front airbag to deploy in a crash exceeding
the appropriate threshold.
Wa r n i n g !
In the event a malfunction of the SRS is indicated
as outlined above, the SRS may not be operational.
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 be activated when needed in an
accident, which could result in serious or fatal
injury, or it might deploy unexpectedly and
unnecessarily which could also result in injury.

64 Restraint systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Side impact airbags
The side impact airbags are designed to activate only in
certain side impacts exceeding a preset threshold. Only
the side impact airbag on the impacted side of the
vehicle deploys.
The side impact airbag for the front passenger deploys
only if the front passenger seat is occupied.
Side impact airbags operate best in conjunction with a
properly positioned and fastened seat belt.
Note:
Objects heavier than 20 lbs (9 kg) on the front
passenger seat can cause the side impact airbag to
deploy in a crash.Important!
Airbags are designed to activate only in certain
frontal (front airbags) impacts, or side (side impact
airbags) impacts which exceed preset thresholds.
Only during these types of impacts, if of sufficient
severity to meet the deployment thresholds, will
they provide their supplemental protection.
The driver and passenger should always wear their
seat belts, otherwise it is not possible for the airbags
to provide their intended supplemental protection.
In cases of other frontal impacts, angled impacts,
roll-overs, other side impacts, rear collisions, or
other accidents in which the airbags are not
designed to deploy, the airbags will not be activated.
The driver and passenger will then be protected by
the fastened seat belts.
We caution you not to rely on the presence of the
airbags in order to avoid wearing your seat belt.

65 Restraint systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care IndexYour vehicle was originally equipped with airbags
that are designed to activate in certain impacts
exceeding a preset threshold to reduce the potential
and severity of injury. It is important to your safety
and that of your passengers that you replace
deployed airbags and repair any malfunctioning
airbags to ensure the vehicle will continue to
provide supplemental crash protection for
occupants.
Wa r n i n g !
Airbags are designed to reduce the potential of
injury in certain frontal (front airbags) impacts,
and side (side impact airbags) impacts which may
cause significant injuries, however, no system
available today can totally eliminate injuries and
fatalities.The activation of the SRS temporarily releases a
small amount of dust from the airbags. This dust,
however, is neither injurious to your health, nor
does it indicate a fire in the vehicle. The dust might
cause some temporary 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
airbag inflates, then get fresh air by opening a
window or door.
Wa r n i n g !
To reduce the risk of injury when the front airbags
inflate, it is very important for the driver and front
passenger to always be in a properly seated
position and to wear their seat belts.For maximum protection in the event of a collision
always be in normal seated position with your back
against the backrest. Fasten your seat belt and
ensure that it is properly positioned on your body.Since the airbag inflates with considerable speed
and force, a proper seating and hands on steering
wheel position will help to keep you at a safe
distance from the airbag. Occupants who are
unbelted, out of position or too close to the airbag
can be seriously injured by an airbag as it inflates
with great force in the blink of an eye:

79 Instrument cluster
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index 1Push buttonsVandWfor intensity of instrument
lamps, see page 81
2Push buttonJ for resetting trip odometer, see
page 83, or to acknowledge a malfunction or
warning message, see page 100.
3Coolant temperature gauge, see page 82
4Fuel gauge with reserve and fuel cap placement
warning lamp, see page 226
5Outside temperature indicator, see page 82
6Left turn signal indicator lamp, see combination
switch on page 113
7ESP warning lamp, see page 2278Speedometer
9Trip odometer, see page 83
10Main odometer, see page 88
11Multifunction indicator, see page 84
or FSS indicator, see page 105
or engine oil level indicator, see page 108
12Right turn signal indicator lamp, see combination
switch on page 113
13Tachometer, see page 83
14Gear range indicator display, see selector lever
positions on page 194
15Clock, see page 102

83 Instrument cluster
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Trip odometer (9)
To reset to “0” miles/km:
Activate the instrument cluster if it is not already
activated by pressing the J button on the instrument
cluster.
Press button è or ÿ on the multifunction
steering wheel repeatedly until the trip odometer
appears if it is not displayed. See page 88.
Press button J on the instrument cluster to reset trip
odometer.Tach o m e te r ( 13 )
The red marking on tachometer denotes excessive
engine speed.
Avoid this engine speed, as it may result in serious
engine damage that is not covered by the
Mercedes-Benz Limited Warranty.
To help protect the engine, the fuel supply is interrupted
if the engine is operated within the red marking.

85 Multifunction steering wheel, multifunction display
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Depending on your vehicle’s equipment, you may use
the buttons on the multifunction steering wheel to call
up, control and set the following systems in the
multifunction display:
1Trip and main odometer, see page 88
Vehicle speed, see page 88
Flexible service system (FSS), see page 105
Engine oil level indicator, see page 108
2Audio systems, see page 89
Radio, see page 89
CD player (optional), see page 90
Cassette player, see page 91
3Navigation system (optional), see page 97
4Malfunction message memory, see page 100
5Individual settings, see page 102
6Trip computer, see page 98
After start
After reset
Fuel tank content
7Telephone (if so equipped), see page 92Press the è or ÿ button repeatedly until the
required system is displayed.
Pressing the è button advances the display to the
next system.
Pressing the ÿ button returns the display to the
previous system.
You may call up additional displays within some of these
categories by pressing the j or k button.
Wa r n i n g !
A driver’s attention to the road must always be his /
her primary focus when driving. For your safety and the safety of others, selecting
features through the multifunction steering wheel
should only be done by the driver when traffic and
road conditions permit it to be done safely.
Programming individual settings in the system can
only be made while the vehicle is at standstill.