Seat belts19
Safety First
Operating Instructions
Practical Tips
Technical Specifications
Why wear seat belts?Physical principles of frontal collisions
In the event of a frontal collision, a large amount of kinetic
energy must be absorbed.
It is easy to explain how the laws of physics work in the case of a head-on
collision: When a vehicle starts moving ⇒fig. 6 , a certain amount of energy
known as kinetic energy is produced in the vehicle and its occupants.
The amount of kinetic energy depends on the speed of the vehicle and the
weight of the vehicle and its passengers. The higher the speed and the
greater the weight, the more energy there is to be released in an accident.
The most significant factor, however, is the speed of the vehicle. If the speed
doubles from 25 km/h to 50 km/h, for example, the kinetic energy is multi-
plied by four.
Because the passengers in our example are not restrained by seat belts, in
the case of a head-on collision all of their kinetic energy has to be absorbed
at the point of impact ⇒fig. 7.
Even at speeds of 30 km/h to 50 km/h, the forces acting on bodies in a colli-
sion can easily exceed one tonne (1000 kg). At greater speed these forces are
even higher.
Passengers not wearing seat belts are not “attached” to the vehicle. In a
head-on collision, they will move forward at the same speed their vehicle was
Fig. 6 Vehicle about to hit
a wall: the occupants are
not wearing seat belts
Fig. 7 The vehicle hits
the wall: the occupants
are not wearing seat belts
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Seat belts21
Safety First
Operating Instructions
Practical Tips
Technical Specifications
Seat belt protection
Passengers not wearing seat belts risk severe injuries in the
event of an accident.Properly worn seat belts hold the vehicle occupants in the correct sitting posi-
tions and substantially reduce the kinetic energy in the event of an accident.
Seat belts also help to prevent uncontrolled movements that could lead to
severe injuries. In addition, properly worn seat belts reduce the danger of
being thrown from the vehicle.
Passengers wearing their seat belts correctly benefit greatly from the ability
of the belts to absorb kinetic energy. The front part of your vehicle and other
passive safety features (such as the airbag system) are also designed to
absorb the kinetic energy released in a collision. Taken together, all these
features reduce the releasing kinetic energy and consequently, the risk of
injury.
Our examples describe frontal collisions. Of course, properly worn seat belts
substantially reduce the risk of injury in all other types of accidents. This is why it is so important to fasten seat belts before every trip, even when "just
driving around the corner".
Ensure that your passengers wear their seat belts as well. Accident statistics
have shown that wearing seat belts is an effective means of substantially
reducing the risk of injury and improving the chances of survival in a serious
accident. Furthermore, properly worn seat belts improve the protection
provided by airbags in the event of an accident. For this reason, wearing a
seat belt is required by law in most countries.
Although your vehicle is equipped with airbags, the seat belts must be
fastened and worn. The front airbags, for example, are only triggered in some
frontal accidents. The front airbags will
not be triggered during minor frontal
collisions, minor side collisions, rear collisions, overturns or accidents in
which the airbag trigger threshold value in the control unit is not exceeded.
Therefore, you should always wear your seat belt and ensure that your
passengers have fastened their seat belts properly before you drive off!
Safety instructions on using seat belts
If seat belts are used correctly, they can reduce the risk of
injury in an accident.– Always wear the seat belt as described in this section.
– Ensure that the seat belts can be fastened at all times and are not damaged.
WARNING
•If the seat belts are worn incorrectly or not at all, the risk of severe inju-
ries increases. The optimal protection from seat belts can be achieved only
if you use them properly.
Fig. 10 A driver wearing
the seat belt properly is
secured by the belt in
sharp braking
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Airbag system29
Safety First
Operating Instructions
Practical Tips
Technical Specifications
•Always adjust the front seats properly.
The danger of fitting a child seat on the front passenger seat
Rear-facing child seats must never be used on the front
passenger seat when the front passenger airbag is enabled.The front passenger airbag is a serious risk for a child if it is activated. The
front passenger seat is life threatening to a child if he/she is transpor ted in a
rear-facing child seat. Children up to 12 years old should always travel on the
rear seat.
If a rear-facing child seat is secured to the front passenger seat, an inflating
airbag can strike it with such force that it can cause critical or fatal injuries.
Therefore we strongly recommend you to transport children on the rear seats.
That is the safest place for children in the vehicle. Alternatively, the front
passenger airbag can be disabled with a key-operated switch ⇒page 44.
When transporting children, use a child seat appropriate to the age and size
of each child ⇒ page 46.
For those vehicles that do not include a key lock switch to disconnect the
airbag, the vehicle must be taken to a Technical Service.
WARNING
•If a child seat is secured to the front passenger seat, the risk to the child
of sustaining critical or fatal injuries in the event of an accident increases.•Never secure a rear-facing child seat to the front passenger seat if the
front passenger airbag is enabled. The child can suffer critical or fatal inju-
ries if the front passenger airbag is triggered.
•An inflating front passenger airbag can strike the rear-facing child seat
and hurl it with great force against the door, the roof or the backrest.•If, under special circumstances, it is necessary to transport a child in a
rear-facing child seat on the front passenger seat, it is absolutely essential
that you observe the following safety measures:
−Deactivate the front passenger airbag ⇒page 44, “Deactivating
airbags”.
− The child seat must be approved by the child seat manufacturer for
use on a front passenger seat with front or side airbag.
− Follow the installation instructions given by the child seat manufac-
turer and observe the safety instructions ⇒page 46, “Child safety”.
− Before properly installing the child seat, push the front passenger
seat completely backwards so that the greatest possible distance to
the front passenger airbag is ensured.
− Ensure that no objects prevent the front passenger seat from being
pushed completely back.
− The backrest of the front passenger seat must be in an upright
position.
Warning lamp for airbag and seat belt tensioner
T
This warning lamp monitors the airbag and seat belt
tensioner system.The warning lamp monitors all airbags and seat belt tensioners in the vehicle,
including control units and wiring connections.
WARNING (continued)
WARNING (continued)
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Cockpit65
Safety First
Operating Instructions
Practical Tips
Technical Specifications
Warning and indicator lampsGeneral description
The warning and indicator lamps indicate a number of
different functions and possible faults.Fig. 44 Instrument panel with warning and indicator lamps
Note
A number of functions are monitored by the auto-check control ⇒page 75. If
a malfunction should occur, this will be shown by the display in the instru-
ment panel either with a red symbol (priority 1 - danger) or a yellow symbol
(priority 2 - warning).
Exhaust emission control system
⇒ page 66
T
Airbag system
⇒page 66
~
Tyr e pre ssu re too low
⇒page 66
Cruise control
⇒page 67
Trailer turn signals
⇒page 67
J
Anti-lock brake system (ABS)
⇒page 67
h
Seat belt warning
⇒page 68
Left turn signals
⇒page 68
!
Electronic Stability Programme (ESP)
⇒page 68
F
Alternator
⇒page 69
Main beam headlights
⇒page 69
% 0 #
Engine management (alternative to
D)
⇒page 69
D
Glow plug system (alternative to
% 0 #)
⇒page 70
H
Fault in brake system / handbrake is
applied
⇒page 70
Right turn signals
⇒page 68
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