
Intelligent Technology167
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Caution
Never allow the brakes to rub by applying sl ight pressure if you do not wish to brake
the vehicle. This causes the br akes to overheat and can also result in a longer braking
distance and excessive wear.
Before negotiating a steep downhill section, please reduce your speed, shift down
into the next lower gear (manual gearbox) or select a lower driving stage (automatic
gearbox). This enables you to make full us e of the braking power of the vehicle and
reduces the strain on the brakes. Any additional braking should be done intermittently,
not continuously.Note
The brake light flashes automatically in case of an emergency braking at speeds greater
than 60 km/h or with the intervention of the ABS, which lasts longer than 1.5 seconds.
After the speed was reduced below 10 km/h or the vehicle was stopped, the brake light
stops flashing and the hazard warning light system switches on. The hazard warning
light system is switched off automatically after accelerating or driving off again.Brake boosterThe brake booster boosts the pressure which you generate with the brake pedal. The
necessary pressure is only genera ted when the engine is running.
WARNING
Never switch off the engine before the vehicle is stationary.
The brake booster only operates when the engine is running. Greater phys-
ical effort for braking is required when en gine 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 significantly to enhanc ing the active safety of your vehicle.
Compared to a vehicle not fitted with the ABS brake system, you are able to retain
optimal steering ability even during a full br ake application on a slippery road surface
because the wheels do not lock up.
In general you must not expect that the braking distance will be shorter under all
circumstances as a result of the ABS. The braking distance for example on gravel and
fresh snow, when you should anyway be driv ing slowly and cautiously, will be longer.
Operating principle
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 tending to lock. This control cycle is noticeable
from a pulsating movement of the brake pedal which is accompanied by noises.
This is consciously intended to provide 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 optimally control the brake application in this braking
range. Never interrupt the application of the brakes!
ABS Off-road*
After switching on the Off-road mode page 170, ABS Off-road is activated.
ABS Off-road increases the braking power of the vehicle on an unfirm ground, as it
keeps the wheels blocked for a longer period of time when the brake is applied while
sliding. The system is only available, if the front wheels are in the straight-ahead posi-
tion.
The system operates at speeds of up to 50 km/h.
WARNING
The ABS can also not overcome the physical limits of your vehicle. Please do
not forget this, particularly when driving on icy or wet road surfaces. If the ABS
is operating within the control range, adapt your speed immediately to the
conditions of the road surface and the traffic situation. The increased safety
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Intelligent Technology
168
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 poss ible and adjust your style of driving to
take account of the ABS fault in the meantime since you will not know the extent
of the fault and in how far the braking efficiency is affected.Note
A warning light comes on if a fault occurs in the ABS system
page 34.
Changes to vehicle (e.g. on engine, on th e brakes, on chassis or another combina-
tion of tyres and wheels) can in fluence the function of the ABS page 222, “Accesso-
ries, 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 sufficient pressure. Consequently, it is not possible
for the vehicle to achieve its maximum deceleration and the vehicle 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 exists than during a normal brake application.
This makes it possible, even with a relative ly 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 th e vehicle. You must apply the brake 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. The Brake Assist is part of the ESP system. If a fault occurs in the ESP, the Brake Assist
function is also not available.
Further information on the ESP page 163.
WARNING
The Brake Assist is also not able to overcome the physical limits of your
vehicle in terms of the braking distance required.
Adapt your speed to the conditions of th e road surface and to the traffic situ-
ation.
The increased safety offered by the Brake Assist must not tempt you to take
a greater safety risk than otherwise.
Uphill Start Assist*The uphill start assist makes it easier to start off on steep hills. The system assists a start
off by holding the brake pressure produced by the brake pedal actuation for approx. 2
seconds after releasing the brake pedal. The driver can therefore move his foot from
the brake pedal to the accelerator pedal and start off on the slope, without having to
actuate the handbrake. The brake pressure drops gradually the more you operate the
accelerator pedal. If the vehicle does not start off within 2 seconds, it starts to roll back.
The uphill start assist is active as of a 3% slope, if the driver door is closed. It is always
active on slopes when in forward or reverse start off. When driving downhill, it is
inactive.Electromechanical power steeringThe power steering enables you to steer the vehicle with less physical force.
With the electromechanical power steering, the steering assist is automatically
adapted to the speed and to the steering angle.
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 there is a fault in the power steering, the warning light
or lights up in the instru-
ment cluster page 31.
WARNING (continued)
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Intelligent Technology169
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
WARNING
Contact your specialist garage if the power steering is defective.Tyre pressure monitoring system*The tyre pressure monitoring system compares with the aid of the ABS sensors the
speed and also the rolling circumference of the individual wheels. If the rolling circum-
ference of a wheel is changed, the warning light
lights up in the instrument cluster
page 34 and an audible sign al sounds. The rolling circumference of the tyre can
change if:
the tyre inflation pressure is too low,
the structure of the tyre is damaged,
the vehicle is loaded on one side,
the wheels of an axle are loaded heavily (e.g. when towing a trailer or when driving
uphill or downhill),
snow chains are mounted,
the temporary spare wheel is mounted,
one wheel per axle was changed.
Basic setting of the system
After changing the tyre inflation pressures, after changing one or several wheels, the
position of a wheel on the vehicle (e.g. exch anging the wheels between the axles) or when the warning light lights up while drivin
g, a basic setting of the system must be
carried out as follows.
Inflate all tyres to the specified inflation pressure page 216.
Switch on the ignition.
Press button fig. 148 for more than 2 seconds. While pressing the button,
the warning light
lights up. At the same time the memory of the system is erased
and the new calibration is started, which is confirmed with an audible signal and then
the warning light goes out.
If the warning light
does not go out after the basic setting, there is a fault in the
system. Have the vehicle inspected by your nearest specialist garage.
Warning light
lights up
If the tyre inflation pressure of at least one wheel is insufficiently inflated in comparison
to the stored basic va lue, the warning light
lights up.
Warning light
flashes
If the warning light flashes, there is a system fault. Have the vehicle inspected by your
nearest specialist garage.
WARNING
When the warning light
lights up, immediately reduce the speed and
avoid sudden steering and brake manoeuvr es. Please stop the vehicle without
delay at the nearest possible stop and in spect the tyres and their inflation pres-
sures.
The driver is responsible for the correc t tyre inflation pressures. For this
reason, the tyre inflation pressures must be checked regularly.
Under certain circumstances (e.g. sporty style of driving, wintry or unpaved
roads) the warning light
can be delayed or does not light up at all.
The tyre pressure monitoring system do es not take away the responsibility
from the driver for the correct tyre inflation pressure.Note
The tyre pressure monitoring system:
Fig. 148 Button for setting the tyre infla-
tion pressure control value
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Intelligent Technology171
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
TCS Off-road page 165,
ABS Off-road page 167.
Switch on Off-road
The Off-road mode is switched on by pressing the button page 170, fig. 150 . The
warning light in the button lights up. The warning light lights up in the instrument
cluster if the system is switched on
page 37.
Switch off Off-road
The Off-road mode is switched off by repe ated pressing of the button. The warning
light in the button goes out. When switching off the ignition, the Off-road mode is also
switched off and can be switched on again, if necessary, after switching on the ignition.
If the engine is switched off by accident an d restarted within 30 seconds, the Off-road
mode remains switched on.
All four wheels must be fitted with the same tyres in order to achieve proper operation
of the Off-road mode. Differing rolling circum ferences of the tyres can lead to an unde-
sirable reduction in the engine output.
WARNING
Always adjust your speed to suit weat her, road and traffic conditions. The
increased safety must not tempt you to take a greater safety risk than otherwise
- risk of accident!
The Off-road equipment can also not overcome the physical limits of your
vehicle.
The effect of the Off-road equipment depends as well on the tyres.
The Off-road equipment is not designed for the use on common roads.
Start-Off Assist*The Start-Off Assist enhances the driving comfort and can be used when starting off, in
particular on a slope. When the vehicle is stationary, the Start-Off Assist is activated
after switching it on using the button for the Off-road mode page 170, fig. 150 .Operating principle
When depressing the accelerator pedal fully, the engine speed required for the start-
up procedure of the stationary vehicle is restricted. The overspeed trip unit is automat-
ically deactivated after terminating the start-up procedure. As part of the Assist System,
the accelerator pedal is adapted in its characteristics for an easier start-off on slippery
and loose soil.
Downhill Drive Support*Operating principle
The Downhill Drive Support maintains a cons
tant speed on a steep downhill section
when driving forwards and backwards by automatically intervening in the brake
system of all wheels. It prevents the wheels locking because the ABS remains active.
The warning light
in the information display of the instrument cluster indicates that
the Downhill Drive Support is available page 37.
The vehicle speed, which is maintained by the Assist System, is selected by the driver
while driving on a downhill section as of the moment the first intervention of the Assist
System is performed or else, while driving on a downhill section, the driver must
control the vehicle speed until the Assist System intervenes for the first time. When the
Assist System actively intervenes, this is indicated by the warning light flashing or by a
pulsating movement of the brake pedal, similar to the intervention of the ABS.
You can increase or reduce the speed, even when no gear is engaged, by operating the
accelerator or brake pedal. Thus the function is always interrupted and is reactivated
afterwards.
The Downhill Drive Support is activated auto matically if the following conditions are
met:
the Off-road mode is switched on and the warning light
lights up in the instru-
ment cluster,
the engine of the vehicle is running and either the 1st, 2nd, 3rd gear, the reverse
gear or no gear is engaged,
the engine of the vehicle is running, the selector lever of the automatic gearbox is
in the position R, N, D, S or Tiptronic,
the speed is less than 30 km/h,
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Driving and the Environment
180
In case the vehicle is stationary on a hillside at a steep angl e, do not exit the
vehicle when it is facing downhill. Throug h this the overall centre of gravity can
shift in such a way that the vehicle tilts and rolls down the hillside - hazard!
Always carefully exit your vehicle on the side facing uphill page 186.
A lack of experience and knowledge when driving off-road can lead to crit-
ical situations an d serious injuries.
Never choose a dangerous route and never take a risk which could jeop-
ardize your safety and that of your passengers. If you cannot go on or if you
doubt the safety of the route, turn back and choose another way. Even a terrain,
which looks harmless, can be difficult and dangerous, and may bring you and
your passengers into a critical situation.
If you have not fastened your seat belt correctly or you are not wearing your
seat belt at all, or you are holding the steering wheel incorrectly when driving
off-road, the risk of severe or even fata l injuries increases. Correctly fastened
seat belts reduce serious injuries in case of sudden braking manoeuvers and
accidents. As long as the vehicle is in motion, always have your seat belt and
those of your passen gers correctly fastened. Take yo ur thumbs off the steering
wheel when driving off-road. Should resist ance build up in front of the wheels,
the steering wheel may suddenly and unexpect edly spin and hur t you. Hold the
steering wheel with both hands firmly on the outer edge in the 9 o'clock and 3
o'clock position.
If you have not fastened your seat belt correctly or you are not wearing your
seat belt at all, or you are holding the steering wheel incorrectly when driving
off-road, the risk of severe or even fatal injuries increases.
Correctly fastened seat belts reduce serious injuries in case of sudden
braking manoeuvers and accidents. Th erefore you and your passengers must
always fasten your seat belts correctl y as long as the vehicle is moving.
Take your thumbs off the steering wh eel when driving off-road. If the
wheels hit an obstac le, the steering wheel may suddenly and unexpectedly spin
and hurt you!
Never use the cruise control system wh en driving off-road. The use of the
cruise control system when driving of f-road is unsuitable and can even be
dangerous.
Do not drive over embankments, ramps or hillsides at too high a speed. This
can lead to the wheels of the vehicle lifting off the ground so that you can no
longer steer and control the vehicle.
If the wheels lose contact with the ground, for example when the vehicle
rebounds while driving over corrugations, steer straight ahead. If the wheels
are turned when making the contact with the ground again, the vehicle can roll
over.
There should never be any person in front or behind the vehicle when rocks,
scrub, wood pieces or other objects ar e placed under the wheels in order to
achieve traction on a sandy or slippery ground. Turning the wheels can trans-
form these objects into dangerous “bullets” – hazard!
Warning of a rolloverVehicles of this type have a higher centre of gravity than ordinary vehicles. This
increases the risk of vehicle rollover when driving on-road and off-road. Therefore, you
must always pay attention to the safety information which is stated in the Owner's
Manual.
WARNING
In the event of a vehicle rollover, an occupant of the vehicle who is not
wearing a seat belt is exposed to a clearly higher risk of injury compared to an
occupant who is wearing a seat belt.
Luggage and other items, which are transported on the roof of the vehicle,
additionally raise the centre of gravity and thus increase the risk of a rollover.
Avoid driving at an angle on a hillside page 186.
Observe the important guidelines page 179.
Important informationOff-road driving is not suitable for everyone. Small children, expectant mothers and
elderly or physically di sabled persons are particularly at risk if the ride is rough and
help is far away.
WARNING (continued)
WARNING (continued)
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Driving and the Environment
182
Embankment angle (front and rear)
Transition from the horizontal plane to an upward slope or from a downward slope
back to the plane. The angle indication determines the angle at which you can drive the
vehicle down the embankment, at a slow speed, without the bumper or the under-
body of the vehicle touching the ground.
Slope angle
The difference of altitude (upward slope) which is overcome on a stretch of road of 100
m, is indicated in percentage or degrees, i. e the gradiant at which the vehicle can climb
a hill on its own (among other things, depe nding on the road surface and the engine
power).
Ground clearance
The distance between the road surface and the deepest point of the vehicle under-
body.
Ramp angle
The angle indication determines the angle at which you can drive the vehicle over a
ramp, at a slow speed, without the underbody of the vehicle touching the ramp edge.
WARNING
When exceeding the maximum value given in the table page 245, “Angle (in
degree)”, this can result in serious inju ries and/or vehicle damage. All of the
data was determined on flat, firm and no n-slip road surfaces as well as under
dry weather conditions. There are no id eal off-road conditions. Therefore,
never completely go according to the maximum values, but always leave a
safety margin.Useful utensilsMany items can be very useful wh en driving off-road, for example:
compass and maps,
torch and spare batteries,
mobile phone or CB radio,
tow bar or tow rope with sufficient tear strength,
electrically driven tyre pump for connect ing to the 12-volt power outlet of the
vehicle,
a blanket and rubber boots,
snow chains,
a timber plank which is approximately 4 cm thick and about 1 metre long can be
used as a traction aid when the vehicle is stuck or as a base for the lifting jack,
additional tools and a folding yardstick or a measuring tape,
spare wheel and tyre repair kit,
shovel.
Safe off-road drivingAdopt a correct seated position and always fa sten the seat belt correctly. Make sure
that your front passenger and your passengers seated on the rear seats always fasten
their seat belts correctly.
When driving off-road, it is perhaps more useful to adopt a slightly different seated
position. Depending on the terrain, an incr eased force may be required to turn the
steering wheel because the force is transferred from the front wheels to the steering
wheel. You must be seated in such a way that you have good front visibility, especially
when driving uphill or downhill. You must never be seated in such a way that the
distance between your chest and the midd le of the airbag cover is less than 25 cm
page 148.
Under no circumstances must you drive off-ro ad with high heels, slippery or open
shoes. You should wear shoes which fit your feet well and allow you to get a feel for the
pedals.
WARNING
Observe the important guidelines page 179.Before driving off-road
Make sure the tyres are suitable for the pl anned off-road journey. Be fore you dri ve
through difficult terrain, equip yo ur vehicle with off-road tyres.
AA
AB
AC
AD
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Driving and the Environment183
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Fill up your tank. The fuel consumption of the vehicle is much higher when driving
off-road than when driving on the road.
Install the towing eye at the front or at the rear before driving off-road. It is not
always possible to install the towing eye if the vehicle got stuck.
Always check the inflation pressure of a ll the tyres and if necessary correct it.
Check the vehicle tool kit and supplement it according to your needs.
Fill with engine oil up to the line , so that the engine is sufficiently supplied with
engine oil when the vehicle is in a tilted position page 205, “Check engine oil level”.
Top up wash fluid.
Stow your load as low as possible in th e vehicle and attach all the items which are
loose.
Off-road driving
Never be alone when driving off-road and be prepared to encounter unexpected
situations. Travel together with at least two off-road vehicles. Equipment with which
you can call for help in an emer gency is particularly useful.
Drive slowly through unclear terrain.
You must stop when encountering difficul t passages and explore the continuation
of the route on foot. If you cannot go on or if you doubt the safety of the route, turn
back and choose another way.
Drive slowly over hilltops. Ma ke sure that the wheels of the vehicle do not lift off
the ground, as this could severely damage the vehicle and it may become disabled.
Drive slowly on difficult stretches of the route. When driving on a slippery ground,
s h i f t u p i n to t h e n e xt h i g h e r g e a r a n d m a ke s u re t h a t t he v e h i c l e a l w a y s s t a y s i n m o t i o n.
Do not drive too fast so that you do n't lose control over your vehicle.
If your vehicle got stuck in sand, snow or sludge, it may be more effective to reverse
the vehicle than trying to drive forwards.
Place stones, footmats or pieces of wood under the spinning wheels in order to
achieve traction on a sandy or slippery ground.
Do no drive throug h water before reading what you must take into account
page 179.
Keep sufficient distance from other vehicles even at low speeds. When the first
vehicle suddenly gets stuck, the following vehi cle can still stop in time without getting
stuck itself.
Do not plan day trips which are too far in distance.
Do not use the cruise control system when driving off-road. It is only intended for
driving on the road.
WARNING
The intelligent engineering of your ve hicle cannot overcome the physical
limits of your vehicle.
Be very alert and look ahead when driving off-road. Excessive speed or
incorrect driving manoeuvres can caus e damage to the vehicle and lead to
serious injuries.
Observe the important guidelines page 179.Caution
Pay attention to the ground clearance of the vehicle! The vehicle can be severely
damaged and become disabled once it touches the ground.
Never drive off-road with an almost empty fuel tank. The fuel supply to the engine
can be interrupted and therefore the cata lytic converter can be severely damaged.
Do not leave your foot on the clutch pedal or let the clutch slip when driving off-
road. Overwise you may unintentionally de press the clutch pedal on uneven ground
leading to a loss of control over the vehicle. In addition, the force for connecting the
engine and the gearbox is lost. Moreover, driving while letting the clutch slip causes a
fast wear of the clutch linings.Note
The fuel consumption is high er when driving off-road than when driving on conven-
tional roads, especially through difficult terr ain. When you prepare for your journey, be
aware of an increase in fuel consumption; the nearest filling station may be far away.
AA
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Driving and the Environment
184
Shifting gears correctlyThe gear you must shift into depends on th e terrain. Choosing the correct gear contrib-
utes to safe driving. In partic ular if you do not have much experience driving off-road,
it is always better, before negotiating a difficult stretch of the road, to pause and reflect
on which gear to engage. Your experience will tell you which gear is the best for certain
sections of the terrain.
Basically:
When the gear or the driving stage has been properly selected, it is unnecessary to
slow down the vehicle on a downhill sectio n using the footbrake as in most cases the
engine braking power is sufficient.
Depress the accelerator only as much as is necessary. A too great acceleration may
lead to the wheels spinning and thus results in the loss over the control of the vehicle.
Manual gearbox
If you are driving thro ugh difficult terrain, on no account use the clutch or change
the gear. When the clutch is depressed, th e vehicle may come to a standstill because
of the increased grip of all the tyres of the vehicle (e.g. in the mud, in deep sand or on
a slope). Once the vehicle has come to a stan dstill, it may be difficult or even impos-
sible to start off under these conditions.
When negotiating a steep downhill section or a steep uphill section, always shift
into the 1st or 2nd gear.
On a soft or slippery ground, you must drive at the appropriate speed and you
must select the highest possible gear for this.
Automatic gearbox
Select the selector lever position for normal flat stretches of terrain
page 121.
While in the Tiptronic mode, select the se lector lever position or if you are
driving through mud, sand, water or hilly sections of terrain page 123.
When negotiating a steep downhill section or a steep uphill section, select the
selector lever position while in the Tiptronic mode.
On a soft or slippery ground, you must drive at the appropriate speed and you
must select the highest possible driving stage.
Driving over rough and smooth– Switch on the Off-road mode page 170.
– Drive at walking speed over rocky passages.
– If it is not possible to drive around a stone, gently drive onto the stone with one of the front wheels and then drive over it slowly.
WARNING
Observe the important guidelines page 179.
Caution
On no account drive over large objects (suc h as pieces of rock or tree stumps),
neither in the middle nor on one side. When driving over objects which are larger than
the ground clearance, the chassis and its components can get damaged. Your vehicle
could break down far away from any assistance.
Even objects that are smaller than the existing ground clearance can come into
contact with the underbody of the vehicle an d can lead to damage or failure of the
vehicle. This applies especially when there is a hollow or soft ground in front or behind
the object or if you drive too fast over the object and thus the vehicle is deflected.For the sake of the environment
Leaking engine oil and brake fluid poll ute the environment and contaminate the
bodies of water. The disposal e.g. of engine oil soaked soil can be costly.
AD
A3
A2
A1
Fig. 157 Observe the ground clearance
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