Ac reset MERCEDES-BENZ SLK230 2000 R170 Owner's Manual

48 Restraint systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Unfastening of seat belts
Push the release button (3) in the belt buckle (2).
Allow the retractor to completely rewind the seat belt by
guiding the latch plate (1).
Operation
The inertia reel stops the belt from unwinding during
sudden vehicle stops or when quickly pulling on the
belt.The locking function of the reel may be checked by
quickly pulling out the belt.
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.• Each occupant should wear their seat belt at all
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, passenger airbag, door mounted
side impact airbags), “ETR” (seat belt
emergency tensioning retractors), and driver
knee bolster. 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.

52 Restraint systems
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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 Retractor
(ETR) 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:
ETR activates
•second threshold exceeded:
airbag also activates
Seat belt not fastened
•first threshold exceeded:
airbag activates, but not ETR
Driver and passenger systems operate independently of
each other.Emergency tensioning retractor (ETR)
The seat belts are equipped with emergency tensioning
retractors. These tensioning retractors are located in
each belt’s inertia reel and become operationally ready
with the key in steering lock position 1 or 2.
The emergency tensioning retractors are designed to
activate only when the seat belts are fastened during
frontal and front-angled impacts and rear 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
movement as much as possible.
In cases of other frontal impacts, roll-overs, certain side
impacts, rear collisions or other accidents without
sufficient frontal or rear impact forces, the emergency
tensioning retractors will not be activated. The driver
and passenger will then be protected by the fastened
seat belts and inertia reel in the usual manner.
For seat belt and emergency tensioning retractor safety
guidelines see page 60.

54 Restraint systems
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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 passenger airbags can provide increased protection
for the driver and passenger in certain frontal impacts
exceeding preset thresholds.
Door mounted side impact airbags can provide
increased protection to belted occupants on the
impacted side of the vehicle in side impacts exceeding
its preset thresholds.
The operational readiness of the airbag system is
verified by the indicator lamp “SRS” in the instrument
cluster when turning the key in steering lock to
position 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.

56 Restraint systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Front airbags
The driver and passenger front airbags are designed to
activate only in certain frontal impacts exceeding a
preset threshold.
The passenger front airbag deploys only if the
passenger seat is occupied, and the 7 indicator la mp
on the center console is not illuminated.
Note:
Heavy objects on the passenger seat can cause the
passenger front airbag to deploy in a crash.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 passenger deploys only if
the passenger seat is occupied.
Side impact airbags operate best in conjunction with a
properly positioned and fastened seat belt.
Note:
Heavy objects 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.

57 Restraint systems
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index 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 must always wear their
seat belts, oth erwi se i t i s not possi ble 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.
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 i t indicate a fire in th e veh icle. Th e dust migh t
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.

58 Restraint systems
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data Instruments
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Your vehicle was originally equipped with airbags
which 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 passenger that you replace deployed
airbags and repair any malfunctioning airbags to
ensure the vehicle will continue to provide crash
protection for occupants.
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
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 w ith your back
against the backrest. Fasten your seat belt and
ensure that it is properly positioned on the 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:
• Sit properly belted in an upright position with
your back against the backrest.• Adjust the driver’s seat as far as possible
rearward, still permitting proper operation of
vehicle controls. The distance from the center
of the driver’s breastbone to the center of the
airbag cover on the steering wheel must be at
least ten inches (25 cm) or more. You should be
able to accomplish this by a combination of
adjustments to the seat and steering wheel. If
you have any problems, please see your
authorized Mercedes-Benz Center.• Do not lean wi th you r head or chest close to th e
steering wheel or dashboard.• Keep hands on the outside of steering wheel
rim. Placing hands and arms inside the rim
can increase the risk and potential severity of
hand / arm injury when the driver front airbag
inflates.• Adjust the passenger seat as far as possible
rearward from the dashboard when the seat is
occupied.

74 Instrument cluster
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data Instruments
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Trip odometer
To reset:
•Press button (1) once (with key in steering lock
position 2).
•Press button (1) twice (with key removed or in
steering lock position 0 or 1).Clock
Ad justing clo ck:
Hour: Pull out knob (2) and turn it to the left.
Minute: Pull out knob (2) and turn it to the right.
Tachometer
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.
P54.30-2722-26
mph
x 100
/ /
0
1
2
P54.30-3043-26

76 Flexible service system
Te ch n ica l
data Instruments
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The counter can also be set by any individual. To do so:
1.Turn key in steering lock to position 2.
2.Within 4 seconds press button (1) twice.
3.The present status for days or distance is displayed.
Within 10 seconds turn key in steering lock to
position 0.
4.Press and hold button (1), while turning key in
steering lock to position 2 again. The present status
for days or distance is displayed once more.
Continue to hold button (1).
After approximately 10 seconds a signal sounds, and
the display shows 10 000 miles (Canada: 15 000 km)
for approximately 10 seconds.
5.Release button (1).
If the FSS counter was inadvertently reset, have a
Mercedes-Benz Center correct it.Note:
When disconnecting vehicle battery for one or more
days at a time, such days will not be counted. Any such
days not counted by FSS can be added by your
Mercedes-Benz Center.
The interval between services is determined by the kind
of vehicle operation. Driving at extreme speeds, and
cold starts combined with short distance driving in
which the engine does not reach normal operating
temperature, reduce the interval between services.
Model SLK 230 Kompressor
The FSS allows for distances between 10 000 miles
(Canada: 15 000 km) and 16 000 miles
(Canada: 25 000 km), or from 365 to 730 days between
services.
Model SLK 320
The FSS allows for distances between 10 000 miles
(Canada: 15 000 km) and 20 000 miles
(Canada: 30 000 km), or from 365 to 730 days between
services.
However you choose to set your reference numbers, the
scheduled services as posted in the Service Booklet
must be followed to properly care for your vehicle.

98 Audio system
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Scan tuning
Press the SC key. Each strong
receivable station on the band
selected will be tuned in for
8 seconds. The first scan will
tune only the stations with a
high signal strength. The second scan will tune every
receivable station. By pressing either the , ,
or buttons, or the “SC” key the scan mode
can be cancelled.
Station memory
Ten stations can be stored in
the AM and FM bands via the
alpha-numeric keypad. The
“0” button corresponds to
location 10. Weatherband
(WB) channels 1 to 7 can be retrieved via the alpha-
numeric keypad and are preset at the factory.Storing stations
Hold the number button down for approximately
2 seconds. The currently displayed frequency is stored
on the selected station button. The storage procedure is
confirmed by a short signal tone.
Retrieving a station from memory
Press the desired station button.
Direct frequency input (AM and FM only)
Select the band. Press the
“ button and enter the
desired frequency using the
alpha-numeric keypad.
Frequencies outside of the
frequency ranges (frequencies specified on page 97)
will not be accepted. The frequency input mode is
cancelled if no button is pressed within 4 seconds.

103 Audio system
Te ch n ica l
data Instruments
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cluster displayPractical hints Car care Index CD changer installed
1CD changer
1
2CD magazine
3CD tray
4CD
If a CD ch anger1 is instal led , it can be operate d from t he
f ront control panel of t he radio. A loa ded ma ga zine must
be installed for CD playing.
1 Optional equipment
Loading / emptying the CD magazine
Slide the changer door to the right and press the eject
button . The magazine will be ejected. Remove the
magazine. Pull out the CD tray until its stop is reached
and place the CDs in the recess of the tray, label side up.
Push the tray into the magazine in the direction shown
by the arrow. Insert the loaded magazine into the
changer.
Important!
Close the door after the magazine has been inserted.
Playing CDs
Press the CD button. The CD most recently played will
start at the point where it was last switched off. CDs
stored in the magazine can be selected by using the
station preset buttons 1-6.
The magazine slot number of
the selected CD will then be
displayed after “CD”. The
number of the track being
played will be displayed after
“TRACK”.
3
2
2
1
4