brakes SKODA SUPERB 2007 1.G / (B5/3U) Owner's Manual

Contents
4
Driving Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intelligent Technology . . . . . . . . . . . . . . . . . . . . . . . .
Electronic stability programme (ESP)* . . . . . . . . . .
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake booster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Antilock brake system (ABS) . . . . . . . . . . . . . . . . . . .
Brake Assist* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diesel particle filter* (diesel engine) . . . . . . . . . . . .
Driving and the Environment. . . . . . . . . . . . . . . . .
The first 1 500 kilometres and then afterwards . .
Catalytic converter . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving in an economical and environmentally
conscious manner . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environmental compatibility . . . . . . . . . . . . . . . . . . .
Motoring abroad . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Avoiding damage to your vehicle . . . . . . . . . . . . . .
To w i n g a t r a i l e r. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing a trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Detachable towing device* . . . . . . . . . . . . . . . . . . . .
General Maintenance. . . . . . . . . . . . . . .
Taking care of your ve hicle and cleaning the
vehicle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Care of the exterior of vehicle . . . . . . . . . . . . . . . . . .
Care of the interior of vehicle . . . . . . . . . . . . . . . . . .
Fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Petrol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refuelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspecting and Replenishing. . . . . . . . . . . . . . . . . .
Engine compartment . . . . . . . . . . . . . . . . . . . . . . . . .
Overview of the engine compartment . . . . . . . . . .
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield washer system . . . . . . . . . . . . . . . . . . . .
Wheels and Tyres. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories, changes and replacement of partsAccessories and replacement parts . . . . . . . . . . . . .
Technical changes . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Breakdown assistance. . . . . . . . . . . . . .
Breakdown assistance . . . . . . . . . . . . . . . . . . . . . . . .
First-aid box* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning triangle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fire extinguisher* . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle tool kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spare wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump-starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tow-starting and towing vehicle . . . . . . . . . . . . . . .
Fuses and light bulbs. . . . . . . . . . . . . . . . . . . . . . . . . .
Electric fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data. . . . . . . . . . . . . . . . . . . . . . . . . .
Te c h n i c a l D a t a. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General comments . . . . . . . . . . . . . . . . . . . . . . . . . . .
Used abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification details . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel consumption according to the regulations
(99/100/EU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.0 ltr./85 kW - EU 4 . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8 ltr./110 kW - EU 4/EU 2 . . . . . . . . . . . . . . . . . . . . .
2.8 ltr./142 kW - EU 4 . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8 ltr./140 kW - EU 2 . . . . . . . . . . . . . . . . . . . . . . . . . .
1,9 l/77 kW TDI PD - EU 4 . . . . . . . . . . . . . . . . . . . . . .
1,9 l/85 kW TDI PD - EU 4 . . . . . . . . . . . . . . . . . . . . . .
1,9 l/96 kW TDI PD - EU 3 . . . . . . . . . . . . . . . . . . . . . .
2.0 ltr./103 kW TDI DPF - EU 4 . . . . . . . . . . . . . . . . . .
2.5 ltr./120 kW TDI PD - EU 4 . . . . . . . . . . . . . . . . . . .
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
155
155
155
158
158
159
159
160
160
162
162
163
163
167
167
168
169
169
171
173
173
173
173
178
181
181
181
182
184
184
186
186
189 191
193
197
199
199
205
205
205
207
207
207
207
207
208
209
209
215
217
220
220
222
227
227
227
227
227
227
227
228
228
230
232
234236
238
240
242
244
246
249
NKO B5 20.book Page 4 Friday, March 2, 2007 1:46 PM

Instruments and Indicator/Warning Lights
28
Open door 
The warning light  comes on if one or several doors are opened or if the boot lid
is opened.
The warning light on vehicles fitted wi th information display comes on when
switching the ignition off. The warning li ght goes out about 15 seconds after locking
the vehicle.
The warning light on vehicles fitted wi th information display goes out after
switching the ignition off.
Windshield washer fluid level 
The warning light  comes on when the ignition is switched on if there is insuffi-
cient fluid in the windshield washer system. Top up the fluid ⇒page 197.
A peep sounds as an additional warning signal.
The following text will be displayed in the information display*: TOP UP WASH FLUID
Light bulbs 
The warning light  comes on if a light bulb is damaged:
•brakes applied (brake light)
•in lighting (low beam and/or rear light)
A peep sounds as an additional warning signal.
The following text will be displayed in the information display*:
LIGHTS FAILURE
or BRAKE LIGHTS FAILURE
Control system for exhaust 
The warning light  comes on after the ignition has been switched on.
If the warning light does not go out after star ting the engine or it lights up or flashes
when driving, a fault exists in an exhaus t relevant component. The engine manage-
ment system selects an emergency programme which enables you to drive to the
nearest specialist garage by adopting a gentle style of driving.
The following text will be displayed in the information display*:
EMISSIONS WORKSHOP! (EMISSIONS WORKSHOP)!
Electronic stability programme (ESP)*
The warning light  comes on for a few seconds when the ignition is switched on.
Components of the ESP system also include the Traction Control System (TCS),
Electronic Differential Lock (EDL), the Antilock Brake System ABS and the braking
assistant
The warning light comes on when drivin g when a control cycle is activated.
The warning light will come on and remains on if the ESP is switched off or if there
is a fault in the system.
The fact that the ESP system operates together with the ABS means that the ESP
warning light will also come on if the ABS system is not operating properly.
Further information on the ESP ⇒page 155, “Electronic stability programme
(ESP)*”.
Traction control system (TCS) *
The warning light  comes on for a few seconds when the ignition is switched on.
The warning light comes on when drivin g when a control cycle is activated.
The warning light will come on and remains on if the TCS is switched off or if there
is a fault in the system.
NKO B5 20.book Page 28 Friday, March 2, 2007 1:46 PM

Instruments and Indicator/Warning Lights
30
The following text will be displayed in the information display*:
STOP BRAKE FLUID SERVICE MANUAL
If there is a fault in the ABS which also influences the function of the normal brake
system (e.g. distribution of brake pressure), the ABS warning light
 comes on
together with the brake system warning light . Be aware that not only the ABS but
also another part of th brake system is defective ⇒.
3 peeps sound as an additional warning signal.
One should get used to high pedal forces, long braking distances and long free play
of the brake pedal when driving to the next specialist garage.
The following text will be displayed in the information display*: STOP BRAKE FAULT SERVICE MANUAL (STOP! BRAKE FAULT OWNER'S
MANUAL)
For further information on the brake system ⇒page 158, “Brakes”.
Handbrake applied
The warning light
 also comes on if the handbrake is applied. An audible warning
is also given if you drive the vehicle for at least 3 seconds at a speed of more than 5
km/h.
The following text will be displayed in the information display*:
HANDBRAKE ON
WARNING
•Pay attention to the following instructions ⇒page 185, “Working in the
engine compartment” before checking the brake fluid level and opening the
bonnet.
•If the brake system warning light  does not go out a few seconds after
switching on the ignition or comes on when driving, stop immediately and
check the brake fluid in the reservoir ⇒page 191, “Brake fluid”. If the fluid
level has dropped below the MIN marking, do not drive any further - risk of
accident! Contact a Škoda dealer to obtain professional assistance.
Alternator 
The warning light  comes on after the ignition has been switched on. It should go
out after the engine has started.
If the warning light
 does not come on after the ignition is switched on, drive to
the nearest specialist garage.
If the warning light does not go out after the engine has started, or comes on when
driving, drive to the nearest specialist garage. The vehicle battery will be discharged
in this case so switch off all non-essential electrical components.
The following text will be displayed in the information display*:
ALTERNATOR WORKSHOP! (ALTERNATOR WORKSHOP!)
Caution
If the warning light  comes on when driving and in addition the warning light 
(cooling system fault) also comes on in display, you must then stop the car imme-
diately and switch the engine off - risk of engine damage!
Seat belt warning light 
The warning light  comes on for a few seconds after the ignition is switched on as
a reminder to fasten the seat belt.
If you do not fasten the seat belt, a long warning signal sounds for 6 seconds.
For further information on the seat belts ⇒page 130.
The following text will be displayed in the information display*: FASTEN SEATBELT
For further information on the seat belts ⇒page 130, “Seat belts”.
NKO B5 20.book Page 30 Friday, March 2, 2007 1:46 PM

Seats and Stowage67
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
WARNING
•Greater pedal distances may be needed when there is a fault in the brake
system.
•Do not place any footmats or other additional floor coverings in the area
of the pedals in order to ensure that all the pedals can be fully depressed and
are able to return unobstructed to their initial position - risk of accident!
•There must be no objects on the floor which could roll under the pedals.
You would then no longer be able to apply the brakes, operate the clutch or
accelerator - risk of accident!
luggage compartment
Loading the luggage compartment
Please observe the following in the inte rest of having good handling char-
acteristics of your vehicle:
– Distribute the items of luggage as evenly as possible.
– Place heavy objects as far forward as possible.
– Attach the items of luggage with th e safety net* or with tensioning
straps attached to the lashing eyes ⇒page 68.
In the event of an accident, there is such a high kinetic energy which is produced by
small and light objects that they can caus e severe injuries. The magnitude of the
kinetic energy depends on the speed at wh ich the vehicle is travelling and on the
weight of the object. The speed at which the vehicle is travelling is in this case the
more significant factor.
Example: In the event of a frontal collis ion at a speed of 50 km/h, an unsecured
object with a weight of 4.5 kg produces an energy, which corresponds to 20 times
its own weight. This means that it results in a weight of approx. 90 kg. You can
imagine the injuries that can occur, if this “bullet” is flying through the interior
compartment and hits an occupant.
WARNING
•Store the objects in the luggage compartment and attach them to the
lashing eyes.
•Loose objects in the passenger co mpartment can be thrown forward
during a sudden manoeuvre or in case of an accident and can injure the
occupants or other oncoming traffic. This risk is still increased, if the objects
which are flying around are hit by a deployed airbag. In this case, the objects
which are thrown back can injure the occupants - hazard!
•Please note that the handling properties of your vehicle may be affected
when transporting heavy objects as a result of the displacement of the
centre of gravity. The speed and style of driving must be adjusted accord-
ingly.
•The items carried in the luggage compartment should be stored in such
a way that no objects are able to slip forward if there are any sudden driving
or braking manoeuvres under taken - risk of injury!
•Never drive with the boot lid fully opened or slightly ajar otherwise
exhaust gases may get into the interior of the vehicle - risk of poisoning!
•On no account exceed the permissible axle loads and the permissible
gross weight of the vehicle - risk of accident!
•Never transport occupants in the luggage compartment!
Note
•Tyre pressure must be adjusted to the load ⇒page 200, fig. 183 .
•The air circulation in the interior of th e car helps to prevent the windows from
misting up. Stale air is diverted via the outlet nozzles into the lateral trim panels of
the luggage compartment. Check for yourself that the outlet nozzles are not
covered.
•On vehicles fitted without foldable back rest but with fixed backrest, the luggage
compartment cannot be enlarged.
NKO B5 20.book Page 67 Friday, March 2, 2007 1:46 PM

Starting-off and Driving
104
A warning signal sounds and the following text appears in the display* if you have
inadvertently driven off with the handbrake applied:
"Handbrake on"
The handbrake warning is activated if you drive at a speed of more than 5 km/h for
more than 3 seconds.
WARNING
•Please note that the handbrake mu st be fully released. A handbrake
which is only partially released can re sult in the rear brakes overheating
which will have a negative effect on th e operation of the brake system - risk
of accident! In addition this can result in premature wear of the rear brake
pads.
•Never leave children unattended in th e vehicle. The children might, for
example, release the handbrake or take the vehicle out of gear. The vehicle
might then move off - risk of accident!
Caution
After the car has come to a stop, always firs t of all apply the handbrake firmly before
then additionally engaging a gear (manual gearbox) or moving the selector lever
into position P (automatic gearbox).
Parking aid*
The parking aid provides a warning of obstacles behind the vehicle.
The audible parking aid determines the di stance between the rear bumper and an
obstacle located behind the vehicle with the aid of ultrasound sensors. The sensors
are integrated in the rear bumper.
Range of sensors
The clearance warning begins at a distance of about 160 cm from the obstacle (area ⇒ fig. 118 ). The interval between the warning signals becomes shorter as the
clearance is reduced.
A continuous tone sounds from a clearanc e of just 30 cm (Bereich ) - danger
area. From this moment on do not continue driving in the selected direction or
the direction from where the obstacle is reported!
Activating
The parking aid is activated automatically when reverse gear is engaged and the
ignition is turned on. This is confir med by a brief acknowledgement signal.
Deactivating
The parking aid is deactivated by removing the reverse gear.
B1Z-0042HB1Z-0042H
Fig. 118 Parking aid:
Detection range of rear
sensors
AA
AB
NKO B5 20.book Page 104 Friday, March 2, 2007 1:46 PM

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
NKO B5 20.book Page 133 Friday, March 2, 2007 1:46 PM

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
NKO B5 20.book Page 156 Friday, March 2, 2007 1:46 PM

Intelligent Technology157
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
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”.
NKO B5 20.book Page 157 Friday, March 2, 2007 1:46 PM

Intelligent Technology
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.
NKO B5 20.book Page 158 Friday, March 2, 2007 1:46 PM

Intelligent Technology159
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
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
NKO B5 20.book Page 159 Friday, March 2, 2007 1:46 PM