Passive Safety
128
Correct seated position for the front passenger
The front passenger must maintain a distance of at least 25 cm from
the dash panel so that the airbag offers the greatest possible safety
when an airbag is deployed.
For the safety of the front passenger and to reduce the risk of injury in the event of
an accident, we recommend the following setting.
•Adjust the front passenger seat as far as possible to the rear.
•Adjust the head restraint so that the top edge of the head restraint is at the same
level as the upper part of your head ⇒page 127, fig. 136 .
•Fasten the seat belt correctly ⇒ page 132.
In exceptional cases the front pass enger airbag can be deactivated ⇒page 144,
“Deactivating an airbag”.
Manual front passenger adjustment ⇒page 59, “Adjusting front seats manually”.
Electrical front passenger seat adjustment ⇒page 60, “Adjusting seats”.
WARNING
•The front seats and the head restraints must always be adjusted to match
the body size of the seat occupant as well as the seat belts must always be
correctly fastened in order to provide an optimal protection for you and your
occupants.
•The front passenger must maintain a distance of at least 25 cm to the
dash panel. Not maintaining this minimum distance will mean that the
airbag system will not be able to properly protect you - hazard!
•Always keep your feet in the footwell when the car is being driven - never
place your feet on the instrument panel, out of the window or on the
surfaces of the seats. You will be exposed to increased risk of injury if it
becomes necessary to apply the brake or in the event of an accident. If an
airbag is deployed, you may suffer fata l injuries when adopting an incorrect
seated position!
•The backrests must not be angled too far back when driving otherwise
this will affect proper operation of the seat belts and of the airbag system -
risk of injury!
Correct seated position for the occupants on the rear seats
Occupants on the rear seats must si t upright, keep the feet in the
footwell and must have their seat belts correctly fastened.
To reduce the risk of injury in the event of a sudden braking manoeuvre or an acci-
dent, the occupants on the rear seats must observe the following.
•Adjust the head restraints so that the to p edge of the head restraints are at the
same level as the upper part of your head ⇒ page 127, fig. 136.
•Fasten the seat belt correctly ⇒page 132, “How are seat belts correctly
fastened?”.
•If you are transporting ⇒page 146, “Transporting children safely” children in
the vehicle, please use a suitable child restraint system.
WARNING
•The head restraints must always be adjusted to match the body size, in
order to offer an optimal protection for you and your occupants.
•Always keep your feet in the footwell when the car is being driven - never
put your feet out of the window or on the surfaces of the seats. You will be
exposed to increased risk of injury if it becomes necessary to apply the brake
or in the event of an accident. If an airbag is deployed, you may suffer fatal
injuries when adopting an incorrect seated position!
•If the occupants on the rear seats are not sitting upright, the risk of injury
is increased due to incorrec t routing of the seat belt.
WARNING (continued)
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Seat belts133
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
– Slowly pull the belt webbing at the to ngue of the lock over your chest
and pelvis ⇒.
– Insert the tongue of the lock into th e seat belt buckle belonging to the
seat until it is heard to lock in place.
– Pull on the belt to check that it has also reliably engaged in the lock.
Each three-point seat belt is equipped with an inertia reel. This inertia reel offers
you complete freedom of movement if the belt is unreeled slowly. If the brakes are
applied suddenly, the inertia reel will block. It also blocks the belts when the car
accelerates, when driving uphill and when cornering.
Expectant mothers must also wear the seat belt ⇒.
WARNING
•The shoulder part of the seat belt must never run across your neck but
must run approximately over the middl e of the shoulder and fit snugly
against the chest. The lap part of the belt must run across the hip and must
never be routed across the stomach. It must always fit snugly ⇒page 132,
fig. 140 . Adjust the belt webbing as required.
•The lap part of the belt should be positioned as low as possible at the
pelvis of an expectant mother in order to avoid exerting any pressure on the
lower abdomen.
•Always ensure that the webbing of the seat belts is properly routed. Seat
belts which are not correctly adjusted ca n themselves cause injuries even in
minor accidents.
•A seat belt which is hanging too loose can result in injuries as your body
is moved forward by the kinetic energy produced in an accident and is then
suddenly held firm by the belt.
•Only insert the lock tongue into the lo ck which is the correct one for your
seat. This will affect the protection whic h the belt offers and increase the risk
of an injury!
Seat belt height adjuster
The seat belt height adjuster makes it possible for you to adapt the
routing of the three-point seat belt in the area of the shoulder to match
your body size.
– Move the height adjuster in the desired direction up or down ⇒fig. 142 .
– Then pull firmly on the belt to ensure that the seat belt height adjuster
has correctly locked in place.
WARNING
Adjust the height of the belt in such a way that the shoulder part of the belt
is positioned approximately across the middle of your shoulder - on no
account across your neck.
Note
It is also possible to adapt the routing of the belt webbing at the front seats by
adjusting the height of the seat.
Fig. 142 Front seat: Seat
belt height adjuster
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Driving Tips
Intelligent Technology
Electronic stability programme (ESP)*
General
General
The ESP aids you maintain control of your vehicle in situations in borderline driving
situations such as when negotiating a curve too fast. The risk of skidding is reduced
and your car thus offers greater driving stability depending on the conditions of the
road surface. This occurs at all speeds.
The following systems are integrated into the electronic stability programme:
•Electronic Differential Lock (EDL),
•Traction control system (TCS),
•Antilock brake system ABS,
•Brake Assist. Operating principle
The ESP switches on automatically when the engine is started and then conducts a
self-test. The ESP control unit processes data from the individual systems. It also
processes additional measurement data which are supplied by highly sensitive
sensors: the rotational velocity of the vehi
cle about its vertical axis, the lateral accel-
eration of the vehicle, the brakin g pressure and the steering angle.
The direction which the driver wishes to ta ke is determined based on the steering
angle and the speed of the vehicle and is constantly compared with the actual
behaviour of the vehicle. If differences exis t, such as the car beginning to skid, the
ESP will automatically brake the appropriate wheel.
The car is stabilised again by the forces which take effect when the wheel is braked.
Intervention into the brake system takes place primarily on the outer front wheel of
a vehicle which tends to oversteer (tendency for the rear of the vehicle to break
away) while occurs this is on the inner re ar wheel of a vehicle which tends to under-
steer (tendency to shift out of the curve). This braking control cycle is accompanied
by noises.
The ESP operates in combination with the ABS ⇒page 159, “Antilock brake system
(ABS)”. If there is a fault in the ABS system, the ESP also does not operate.
The ESP warning light ⇒page 28 lights up in the instrument cluster when there is a
fault on the ESP.
Switching off
You can switch the ESP off and on again as you wish, by pressing the button
⇒ fig. 163 . The ESP warning light ⇒page 28 lights up in the instrument cluster
when the ESP is switched off.
The ESP should normally always be switched on. It may be good practice to switch
the system off only in particular exceptional situations if you desire wheel slip.
Examples:
•when driving with snow chains,
B1Z-0042HB1Z-0042HFig. 163 ESP switch
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Intelligent Technology
156
•when driving in deep snow or on a loose surface,
•when it is necessary to rock a ca r free when it has become stuck.
then you should switch on the ESP again.
WARNING
It is also not possible for the ESP to overcome the physical limits of the
vehicle. Even if a vehicle fitted with ESP you should still always adapt your
style of driving to the condition of the road surface and the traffic situation.
This particularly applies when driving on slippery and wet roads. The
increased safety offered must not tempt you to take greater risks than other-
wise - risk of an accident!
Note
•All four wheels must be fitted with the same tyres in order to achieve problem-
free operation of the ESP. Differing rolling circumferences of the tyres can lead to an
undesirable reduction in the engine output.
•Changes to vehicle (e.g. on engine, on the brakes, on chassis or other assign-
ment of tyres and wheels) can influence the function of the ESP ⇒page 205.
Traction control system (TCS)*
The traction control system prevents the driven wheels from spinning
when accelerating.
General
The TCS makes it much easier, and sometimes at all possible, to start off, accelerate
and climb a steep hill when the conditions of the road surface are unfavourable.
Operating principle
The TCS switches on automatically when th e engine is started and then conducts a
self-test. The system monitors the speeds of the driven wheels with the aid of the
ABS sensors. If the wheels ar e spinning, the force transmitted to the road surface is
automatically adapted by reducing the engi ne speed. This occurs at all speeds.
The TCS operates in combination with the ABS ⇒page 159, “Antilock brake system
(ABS)”. The TCS will not function if a fault exists in the ABS system.
The TCS warning light ⇒page 28 lights up in the instrument cluster when there is a
fault on the TCS.
Switching off
You can switch the TCS off and on again as you wish by pressing the button
⇒ fig. 164 . The TCS warning light ⇒page 28 lights up in the instrument cluster
when the TCS is switched off.
B1Z-0042HB1Z-0042HFig. 164 TCS switch
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The TCS should normally always be switched
on. It may be good practice to switch
the system off only in particular exceptional situations if you desire wheel slip.
Examples:
•when driving with snow chains,
•when driving in deep snow or on a loose surface,
•when it is necessary to rock a car free when it has become stuck.
then you should switch on the TCS again.
The EDL ⇒page 157, “Electronic Differential Lock (EDL)” is a part of the TCS. THE
EDL operates independently of the TCS (a lso when the TCS has been switched off
using the TCS button).
WARNING
You should always adjust your style of driving to the conditions of the road
surface and the traffic situation. The increased safety offered must not tempt
you to take greater risks than otherwise - risk of an accident!
Note
•All four wheels must be fitted with the same tyres in order to achieve problem-
free operation of the TCS. Differing rollin g circumferences of the tyres can lead to
an undesirable reduction in the engine output.
•Changes to vehicle (e.g. on engine, on the brakes, on chassis or other assign-
ment of tyres and wheels) can influence the function of the TCS ⇒page 205,
“Accessories, changes and replacement of parts”.
Electronic Differential Lock (EDL)
The electronic differential lock pr events an individual wheel from
slipping.
General
The EDL makes it much easier, and sometimes at all possible, to start off, accelerate
and climb a steep hill when the conditio ns of the road surface are unfavourable. Operating principle
The EDL is activated automatically, that is without any action on the part of the
driver. It monitors the speeds of the driven wheels with the aid of the ABS sensors.
Should only
one drive wheel begin spinning on a sl ippery surface there will be an
appreciable difference in the speed of the driven wheels. The EDL function brakes
the slipping wheel and the differential transmits a greater driving force to the other
driven wheel. This control proce ss is also accompanied by noises.
Overheating of the brakes
The EDL switches off automatically if unus ually severe stresses exist in order to
avoid excessive heat generation in the disc brake on the wheel which is being
braked. The vehicle can continue to be driven and has the same characteristics as a
vehicle not fitted with EDL.
The EDL switches on again automatically as soon as the brake has cooled down.
WARNING
•Depress the accelerator carefully when accelerating on uniformly slip-
pery road surfaces, such as ice and sn ow. The driven wheels might still spin
despite the EDL and affect the stability of the vehicle - risk of an accident!
•You should always adapt your style of driving to the condition of road
surface and to the traffic situation even when your vehicle is fitted with EDL.
The increased safety offered must not tempt you to take greater risks than
otherwise - risk of an accident!
Note
•If the ABS warning light comes on, this may also indicate a fault in the EDL.
Please have the car inspec ted as soon as possible by a specialist garage.
•Changes to vehicle (e.g. on engine, on the brakes, on chassis or other assign-
ment of tyres and wheels) can in fluence the function of the EDL ⇒page 205,
“Accessories, changes and replacement of parts”.
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158
Brakes
What has a negative effect on braking efficiency?
Wear-and-tear
Wear-and-tear to the brake pads is greatly dependent on the operating conditions
of the vehicle and your style of driving. Particularly if you drive a great deal in towns
and over short distances or if you adopt a sporty style of driving, it may be neces-
sary to have the thickness of the brake pads inspected at a specialist garage
between the service inspections.
Wet roads or road salt
There may be a certain delay before the brakes take full effect under certain condi-
tions such as when driving through water, during heavy rain showers or after the
vehicle has been washed in an automatic vehicle wash, since the brake discs and
brake pads may be moist or even have a coating of ice on them in winter. You
should dry the brakes as soon as possib le (by applying and releasing the brakes
several times, if the road conditions and the traffic situation allows it).
There also may be a certain delay before the full braking efficiency is available when
driving on roads which have been treated wi th road salt if you have not used the
brakes for some considerable time beforeha nd. The layer of salt on the brake discs
and brake pads must first be rubb ed off when you apply the brakes.
Corrosion
Corrosion on the brake discs and dirt on th e bake pads occur if the vehicle has been
parked for a long period and if you do not make much use of the braking system.
We recommend cleaning the brake discs by firmly applying the brakes at a fairly
high speed if you do not make much use of the braking system or if surface corro-
sion is present ⇒.
Faults in the brake surface
If you notice that the braking distance has suddenly become longer and that the
brake pedal can be depressed further, it is possible that a brake circuit of the dual-
circuit brake system has failed. Drive, in such cases, to the nearest specialist garage
without delay in order to have the problem rectified. Drive at a reduced speed while
on your way to the dealer and adapt your style of driving to the higher brake pedal
pressure required. Low brake fluid level
An insufficient level of brake fluid may result in problems in the brake system. The
level of the brake fluid is monitored electronically
⇒page 29, “Brake system ”.
WARNING
•Only apply the brakes for the purpos e of drying and cleaning the brake
discs if the traffic conditions permit this. Do not place any other road users
in jeopardy.
•When retrospectively mounting a front spoiler, solid wheel hubs etc. one
must ensure that the air supply to the front wheel brakes is not reduced
otherwise the braking sy stem could run too hot.
•Allow for the fact that new brake pads do not achieve their full braking
efficiency until approximately 200 kilo metres. New brake pads must be first
“run in” before they develop their optimal friction force. You can, however,
compensate for this slightly reduced braking force by increasing the pres-
sure on the brake pedal. This guidelin e also applies to any new brake pads
installed at a future date.
Caution
•Never allow the brakes to ru b by applying slight pressure if you do not wish to
brake the vehicle. This causes the brakes to overheat and can also result in a longer
braking distance and excessive wear.
•Before negotiating a steep downhill sect ion, please reduce your speed, shift
down into the next lower gear (manual ge arbox) or select a lower driving stage
(automatic gearbox). This enables you to make full use of the braking power of the
vehicle and reduces the strain on the brakes . Any additional braking should be done
intermittently, not continuously.
Brake booster
The brake booster boosts the pressure which you generate with the brake pedal.
The necessary pressure is only gene rated when the engine is running.
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WARNING
•Never switch off the engine before the vehicle is stationary.
•The brake booster only operates when the engine is running. Greater
physical effort for braking is required when engine is switched off. Because
if you do not stop as normal, this can cause an accident and severe injuries.
Antilock brake system (ABS)
ABS prevents the wheels locking when braking.
General
The ABS contributes significan tly to enhancing the active safety of your vehicle.
Compared to a car not fitted with the ABS brake system, you are able to retain
optimal steering ability even during a fu ll brake application on a slippery road
surface because the wheels do not lock up.
You must not expect, however, that the br aking distance will be shorter under all
circumstances as a result of the ABS. Th e braking distance for example on gravel
and fresh snow, when you should anyway be driving slowly and cautiously, will be
longer.
Operating principle
As soon as the vehicle speed has increa sed to about 6 km/h an automatic test
procedure is conducted during which you wi ll be able to hear a pumping noise for
about 1 second.
The brake pressure will be reduced on a wheel which is rotating at a speed which is
too low for the speed of the vehicle and tend ing to lock. This control cycle is notice-
able from a pulsating movement of the brake pedal which is accompanied by
noises. This is consciously intended to pr ovide the driver with the information that
the wheels are tending to lock (ABS control range). You must always keep the brake
pedal depressed to enable the ABS to optima lly control the brake application in this
braking range. Never interrupt the application of the brakes!
WARNING
•The ABS can also not overcome the physic al limits of your vehicle. Please
do not forget this, particularly when driv ing on icy or wet road surfaces. If the
ABS is operating within the control ra nge, adapt your speed immediately to
the conditions of the road surface and the traffic situation. The increased
safety offered by the ABS must not tempt you to take greater risks than
otherwise - risk of an accident!
•The normal braking system is still fully functional if there is an ABS fault.
Visit a specialist garage as quickly as po ssible and adjust your style of driving
to take account of the ABS fault in the meantime since you will not know how
great the damage is.
Note
•A warning light comes on if a fault occurs in the ABS system ⇒page 29.
•Changes to vehicle (e.g. on engine, on the brakes, on chassis or other assign-
ment of tyres and wheels) can in fluence the function of the ABS ⇒page 205,
“Accessories, changes and replacement of parts”.
Brake Assist*
During a severe brake application (e.g. if a hazard exists), the Brake Assist increases
the braking force and thus makes it possible to rapidly produce the pressure
required in the brake system.
The majority of drivers do apply the brakes in good time in dangerous situations,
but do not depress the brake pedal with suff icient pressure. Consequently, it is not
possible for the car to achieve its maxi mum deceleration and the car covers a
greater distance than necessary.
The Brake Assist is activated by the very quick operation of the brake pedal. In such
cases, a much greater braking pressure ex ists than during a normal brake applica-
tion. This makes it possible, even with a relatively low resistance of the brake pedal,
to produce an adequate pressure in the brake system in the shortest possible time,
which is required for maximum deceleration of the car. You must apply the brake
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160
pedal firmly and hold it in this position in order to achieve the shortest possible
braking distance.
The Brake Assist is able to help you achieve a shorter braking distance in emergency
situations by rapidly producing the pressure required in the brake system. It fully
exploits the attributes of the ABS. After you release the brake pedal, the function of
the Brake Assist is automatically switched off and the brakes operate in the normal
way.
WARNING
•The Brake Assist is also not able to overcome the physical limits of your
car in terms of the braking distance required.
•Adapt your speed to the conditions of the road surface and to the traffic
situation.
•The increased safety offered by the Brake Assist must not tempt you to
take a greater safety risk than otherwise.
Power steering
Power steering assists the driver in steering the vehicle and reduces the physical
force needed for steering.
The steering characteristics can be changed by a specialist garage.
It is still possible to fully steer the vehicle if the power steering fails or if the engine
is not running (vehicle being towed in). The only difference is that greater physical
effort is required.
If the steering is turned to full lock when the car is stationary, you will place great
stresses on the power steering system. Turning the steering to full lock in such a
situation will be accompanied by noises. In addition, the idling speed of the engine
will drop briefly.
Caution
Do not leave the steering at full lock for more than 15 seconds when the engine is
running - risk of damagi ng the power steering!
Note
•Have the steering inspected as soon as po ssible by a specialist garage if there is
a leak or fault in the system.
•The power steering requires a special hydraulic oil. The oil reservoir is located
at the front left of the engine compartment ⇒page 186. The correct hydraulic oil
level is important for proper oper ation of the power steering system.
Diesel particle filter* (diesel engine)
In the diesel particle filter the resulting soot particles are collected
and burnt during the combustion of diesel fuel.
Code 7GG on the vehicle data sticker ⇒fig. 165 indicates that your
vehicle is equipped with a diesel particle filter. The vehicle data sticker is
located on the floor of the luggage com partment and is also stated in the
Service schedule.
The diesel particle filter filters the soot particles completely from the exhaust. The
soot is collected in the diesel particle filter and burnt regularly. To assist this proce-
dure, we recommend not to drive regularly over short distances.
Fig. 165 Vehicle data
sticker
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