
Driving and the Environment
176
Avoiding full throttle Driving more slowly means saving fuel.Sensitive use of the accelerator will not only
significantly reduce fuel consumption but
also positively influence environmenta
l pollution and wear of your vehicle.
You should avoid exploiting the top speed
of your vehicle wherever possible. Fuel
consumption, pollutant emissions and vehicle noises increase disproportionally at high speeds. The
⇒fig. 160
shows the ratio between the fuel
consumption and the speed of your
vehicle. You will cut your fuel consumption by
half if you only make use three-quarters
of the possible top speed of your vehicle.Reducing idling Idling also costs fuel.It is worthwhile switching off the engine in
a traffic jam or when waiting at a level
crossing or at traffic lights with a lengthy red phase. Even after just 30 - 40 seconds you will have saved more fuel th
an that is needed when you start the engine up again.
If an engine is only idling it takes much
longer for it to reach its normal operating
temperature. Wear-and-tear and pollutant emis
sions, though, are particularly high in
the warming-up phase. This is why you should drive off right after starting the engine. Do avoid high engine revolu
tions at this time, however.
Regular servicing A poorly tuned engine consumes an unnecessarily high amount of fuel.Having your vehicle serviced regularly at a specialist garge enables you to satisfy
one
of the requirements for economical motoring
even before you set off on your journey.
Keeping your vehicle properly serviced not on
ly has a positive effect on the safety of
your vehicle and maintaining its value, but also saves on
fuel
.
A poorly tuned engine can result in a fuel consumption which is 10% higher than normal. The foreseen maintenance work should be undertaken exactly according to the Service schedule by a specialist garage. Also check the
oil level
after refueling.
Oil consumption
is dependent to a consider-
able extent on the load and speed of the en
gine. Oil consumption could be as high as
0.5 litres/1 000 km depending on your style of driving. It is quite normal that a ne
w engine has a higher oil cons
umption at first, and reaches
its lowest level only after a certain running
in time. It is therefore not possible to
correctly assess the oil consumption of a ne
w vehicle until after you have driven about
5 000 km.
For the sake of the environment
•
You can achieve additional
improvements in your fuel economy by using high-
lubricity oils.•
Check the ground below your vehicle at regular intervals to detect any leakages in
good time. Please have your vehicle inspec
ted by a specialist garge if you find any
stains caused by oil or other fluids on the floor.
Fig. 160 Fuel consumption in litres/100 km. and speed in km/h.
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Driving and the Environment
179
Using the system
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Driving Tips
General Maintenance
Breakdown assistance
Technical Data
HeadlightThe low beam of your headlights is set asymmetrically. It illuminates the side of the road on which you are driving to a greater ex
tent. If you drive abroad on the other side
of the road, you will
dazzle oncoming traffic.
In order to prevent the dazzling of oncoming traffic, it is necessary that an adjustment of the headlights is carried out by a specialist garage. The adaptation of the headlights with Xenon
lights* (applies only to
vehicles which are
designed for driving on the right and on the left) is performed in the menu
Setup
Tr a v e l m o d e
in the main menu of the Information display*
⇒page 24.
Note
You can obtain further information regarding masking over the headlights from a specialist garage.Avoiding damage to your vehicleWhen driving on poor roads and lanes or
when driving over kerbstones, steep ramps
etc., you must pay particular attention to
ensuring that any low-slung parts of the
vehicle, such as spoiler and exhaust,
do not touch the ground and get damaged.
This particularly applies to
models with a lowered suspen
sion (sport suspension) and
also when your vehicle is fully laden.Driving through bodies of water on roads
In order to avoid damage to the vehicle wh
en driving through bodies of water (e.g.
flooded roads), observe the following:•
Determine the depth of the water when driv
ing through bodies of water. The water
can reach at the maximum the web on the lower sill of the vehicle
⇒fig. 162
.
•
Drive no more than at walking speed. At a higher speed, a water wave can form in
front of the vehicle which can cause water to
penetrate into the air induction system of
the engine or into other parts of the vehicle.•
Never let the vehicle stand in the water,
never drive backwards and do not switch
off the engine.
WARNING
•
Driving through water, mud, sludge etc. can reduce the braking power and
extend the braking distance - risk of accident!•
Avoid sudden and severe braking manoeuvres immediately after driving
through bodies of water.•
After driving through bodies of water, the brakes must be cleaned and dried
as soon as possible by intermittent braking. Only apply the brakes for the purpose of drying and cleaning the brake
discs if the traffic conditions permit
this. Do not place any other road users in jeopardy.
Caution
•
When driving through bodies of water, pa
rts of the vehicle such as the engine,
gearbox, catalytic converter, chassis
or electrics can be severely damaged.
•
Oncoming vehicles can gene
rate water waves which ca
n exceed the permissible
water level for your vehicle.•
Potholes, mud or rocks can be
hidden under the water making it difficult or impos-
sible to drive through the body of water.•
Do not drive through salt water. The salt
can lead to corrosion. Immediately rinse
all the parts of the vehicle, which came into
contact with the salt water, with fresh
water.
Fig. 162 Crossing bodies of water
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Driving and the Environment
183
Using the system
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Driving Tips
General Maintenance
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Technical Data
•
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 dow
nhill. You must never be seat
ed 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 fe
et well and allow you to get a feel for the
pedals.
WARNING
Observe the important guidelines
⇒page 180.
Before driving off-road•
Make sure the tyres are suitable for the planned off-road journey. Before you drive
through difficult terrai
n, equip your vehicle with off-road tyres.
•
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 suppl
ement 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 the 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 em
ergency is partic
ularly 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. Make 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,
shift up into the next higher gear and make
sure that the vehicle always stays in motion.
Do not drive too fast so that you don'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 through 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 overco
me the physical
limits of your vehicle.
AA
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Driving and the Environment
186
– Do not shift gears or release the
clutch during th
e climbing phase.
– Depress the accelerator only as much as
is necessary in order
to handle the slope.
If you can go no further on a slope– Never attempt to make a turn with the vehicle on a hillside. – If the engine cuts out, press the foot brake and restart the engine. – Engage the reverse gear and carefully
drive backwards in your own tracks.
– Press the foot brake in order to maintain a constant speed.Driving downhill–Switch on the Off-road mode
⇒page 170.
– Shift into first gear or select the first driving stage, while in the Tiptronic mode, to
drive downhill on steep hillsides in order
to use the Downhill Drive Support to its
maximum.
– Press the foot brake gently, so you do not lose the control over your vehicle. – If it is feasible and safe, drive straight down (maximum gradient).– Do not release the clutch or shift into Neutral.
WARNING
•
Never attempt to drive uphill or downhill if it is too steep for your vehicle.
The vehicle could slip or roll
over - risk of accident!
•
Never attempt to make a turn on a hillside. The vehicle could tilt or roll over.
This can result in serious accidents.•
If the engine cuts out on a slope or
you can no longer go on for whatever
other reason, then stop!•
Never let the vehicle roll down the hill
side at idling speed. You can lose the
control over your vehicle.•
If the engine cuts out, press the foot brake and restart the engine. Engage the
reverse gear and carefully drive backward
s in your own tracks. Use the engine
braking power and press the foot brake in order to maintain a slow and constant speed.
•
Observe the important guidelines
⇒page 180.
Driving at an angle on a hillsideFig. 166 Steer and maintain your trajectory
/ in direction to exit - facing uphill
Driving at an angle on a hillside is one of the most dangerous situations while driving off-road. It may look harmle
ss, but you must never underestimate the difficulties and
the dangers when driving at an angle on a
hillside. Basically you should avoid moving
your vehicle into a sideways
position on a hillside. Unde
r certain circumstances, the
vehicle can slide away uncontrollably or roll over. Check before driving in a tilted position, whether there is a different and safer route. If you have to drive in a tilted position, then
the ground should be as firm and even as
possible. Note that the vehicle may slide sideways or sink in and roll over when driving on slippery or soft ground. Make sure that
the inclination is not too steep when driving
over surface irregularities. Otherwise, the vehicle can roll over and then roll down the hillside. If the vehicle is at a very steep angle, the wheels on the low side must not sink deeply into the ground or into troughs and you mu
st not drive over stones, tree stumps or
other obstructions with the alternate raised wheels. If there is a risk your ve
hicle may tilt, steer immedi
ately in direction of dip
⇒fig. 166
and lightly depress the accelerator. The centre
of gravity of the vehicle should be as low
as possible. Distribute the weight of all the occupants of the vehicle evenly. Taller and heavier people should be seated on the rais
ed side of the vehicle. The luggage on the
WARNING (continued)
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Driving and the Environment
187
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
roof should be removed and secured, as the
vehicle could tilt by
a sudden shifting of
the luggage. A passenger, seated at the rear, should always
remain seated on the seat facing up the
hill during such a journey. In an extreme ca
se, the passenger on the relevant side must
exit the vehicle until you have
safely crossed the hillside.
Exiting the vehicle on a hillside If the vehicle comes to a standstill at a steep angle on a hillside and you and your passengers must exit the vehicle, then all th
e occupants should exit on the side facing
up the hill
⇒page 186, fig. 166
on the right.
WARNING
•
Never attempt to drive uphill or downhill if it is too steep for your vehicle.
The vehicle could slip, tilt or roll over - risk of accident!•
When driving at an angle on a hillside,
the vehicle can lose its grip and slide
sideways. The vehicle can tilt or roll over
and then roll down the hillside. This
can lead to serious injuries.•
Always make sure that when the vehicle
is at an angle, the wheels on the low
side do not sink deeply into the ground or into troughs and do not drive over stones, tree stumps or other obstructions
with the alternate ra
ised wheels - risk
of accident!•
Before you drive at an angle on a hillside
⇒page 186, fig. 166
, make sure
that you can steer and maintain your trajectory. If this is not possible, choose a different path. If you drive at an angle
on a hillside and there is a risk your
vehicle may tilt, steer imme
diately downhill on your trajectory and lightly
depress the accelerator.•
If the vehicle is stationary on a hillside
with a too great angle of lateral incli-
nation, avoid sudden and uncontrolled movements in the vehicle. The vehicle can roll over and then roll down the hillside. This can lead to serious injuries.•
If the vehicle is stationary on a hillside
with a too great angle of lateral incli-
nation, neither you nor your occupants must exit the vehicle through the doors facing downhill. This can lead to a shift of the overall centre of gravity. The vehicle can tilt or roll over and then roll down the hillside. This can lead to serious injuries. To avoid this, you and your occupants must exit the vehicle only on the side facing uphill
⇒page 186, fig. 166
.
•
When you exit the vehicle, make sure
that the door which faces uphill does
not close by its own weight or by carelessness - risk of injury!•
Observe the important guidelines
⇒page 180.
Driving over rutted roads and troughsYou will always encounter ruts when drivin
g on forest roads, through wet meadows
and fields as well as on rutted stretches of terrain. If the ruts and troughs are on firm and soft ground, you can simply follow the ruts.Do not drive over ruts and troughs which are
too deep. If you cannot avoid this, it is
better that you turn back.
Caution
If the ruts or troughs become too deep,
the underbody of the vehicle can touch the
ground, which might cause the
underbody to get damaged. Therefore, avoid driving in
deep ruts and troughs.Crossing a trenchIf possible, drive through the trench at an acute angle. Make sure when driving through the trench that the tilt angle is not too steep.
WARNING
Never attempt to drive through a trench if its embankment is too steep. The vehicle could slip, tilt or roll over - risk of accident!
Caution
If you drive into the trench at a right angle,
the front wheels will sink into the trench.
There is also the danger that the underbod
y of the vehicle touches the ground and is
damaged. For these reasons (even with four-wheel drive) it is rarely possible to get out of the trench.
WARNING (continued)
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Driving and the Environment
189
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
After driving off-roadCheck the vehicle for damage after driving off-road - especially on the underside of the vehicle. – Switch off the Off-road mode
⇒page 170.
– Check the tyres and the axles for damage and remove coarse dirt, stones and
foreign bodies from the tyre tread.
– Clean the turn signal lights, the headlights, the number plate and the windows. – Check the underbody of the vehicle and re
move trapped objects, such as scrub or
wood pieces.
– Contact your specialist gara
ge if you detect any damage.
– In case of thick layers of
dirt, clean the radiator grille, the engine compartment and
the underbody of the vehicle.
WARNING
•
Combustible materials which are trapped under the vehicle floor can be
dangerous. They can impair the driving
safety and the safety of all the occu-
pants of the vehicle. After driving off-
road, always check the underside of the
vehicle and remove trapped objects.•
Never continue the journey if objects
are trapped under the vehicle. This
can damage the fuel lines, the brake sy
stem, the seals and other parts of the
chassis.•
Combustible objects such as dry leaves or twigs could ignite on hot vehicle
parts. A vehicle fire can also lead to serious injuries.•
Observe the important guidelines
⇒page 180.
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Towing a trailer
191
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Headlights Before starting off with a hitched trailer, also check the setting of the headlights. Alter the setting as necessary with the ai
d of the headlight beam adjuster
⇒page 58.
Detachable ball head The ball rod is detachable on vehicles which
feature a factory-fitted
towing device. It is
stowed together with separate fitting instru
ctions in the spare wheel well in the luggage
compartment of the vehicle. Further information on the towing device
⇒page 192.
Note
•
We recommend that you also have your
vehicle inspected between service inter-
vals if you tow a trailer frequently.•
The handbrake on the towing vehicle must be put on when coupling and decou-
pling the trailer.Driving Tips Particular caution is required when towing a trailer.– Do not, as far as possible, drive with
your vehicle unladen and the trailer laden.
– Do not make full use of the legal maximum speeds. This applies in particular to
downhill sections.
– Apply the brakes in good time. – Keep a check on the coolant temperature gauge if the outside temperature is high. Distribution of weight The distribution of the weight
is very poor if your vehicle
is unladen and the trailer is
laden. Maintain a particularly low speed if you cannot avoid driving with this combina-tion. Driving speed Do not drive faster than 80 km/hour for safety reasons. This also applies for countries in which higher speeds are allowed.
The fact that the driving stability of the vehicle + trailer combination reduces with increasing speed means that the legally allowed speed should not be used when there are unfavourable road, weather or wind cond
itions, particularly near accident black
spots. You must always reduce your speed immediat
ely as soon as you detect even just the
slightest swaying
of the trailer. On no account attempt to stop the trailer from
“swaying” by accelerating. Apply the brakes in good time! If
the trailer is fitted with a
trailer brake
, apply the
brakes gently at first and then brake firmly. This will avoid brake jolts resulting from the trailer wheels locking. Shift down gears in good time before negotiating a downhill section to allow the engine to also act as a brake. Engine overheating Please keep a check on the coolant temperature gauge if you have to negotiate a lengthy slope in a low gear at a high engi
ne speed when the outside temperature is
very high
⇒page 17, “Coolant temperature gauge”.
If the needle of the coolant temperature gauge moves into the right-hand area or even the red area of the scale, reduce your speed immediately. Stop and switch off the engine if the warning light
in the instrument cluster begins flashing. Wait a few
minutes and check the level of coolant in the coolant expansion bottle
⇒page 207,
“Inspecting the coolant level”. Please refer to the following guidelines
⇒page 34, “Coolant temperature/ Coolant
quantity
”.
The coolant temperature can be reduced by switching on the heating.Any increase in the cooling effect of the coolant fan through shifting down a gear and increasing the engine speed is not possible
since the fan speed is independent of the
engine speed. One should also not drop a gear
for this reason when towing a trailer as
long as the engine can manage th
e slope without any drop in speed.
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Taking care of your vehicle and cleaning the vehicle
194
There are no particular points to note be
fore washing your vehicle in an automatic
vehicle wash system other than the usua
l precautionary measures (closing the
windows and the sliding/tilting roof etc.). If you have any particular atta
ched parts fitted to your car
- such as spoiler, roof rack
system, two-way radio aerial - it is best to first of all consult the operator of the car wash plant. It is important to degrease
the lips of the windscreen
wiper rubbers after passing
through the automatic
vehicle wash system.
Washing vehicle by handIt is important to first soften the dirt with
plenty of water and rinse it off as thoroughly
as possible before washin
g your vehicle by hand.
One should then clean the vehicle using a soft
washing sponge
, washing glove
or a
washing brush
and only slight pressure. Work from
the top to the bottom - beginning
with the roof. Only place slight pressure on
the vehicle paintwork
during cleaning. Only
use a
car shampoo
for stubborn dirt.
Wash out the sponge or washing glove thoroughly at short intervals.Clean wheels, door sills and similar parts last. Use a second sponge for such areas.Rinse off the vehicle well after giving it a wash and dry it off using a chamois leather.
WARNING
•
The ignition should always be switched off when you wash your vehicle -
risk of accident!•
Protect your hands and arms from sharp-edged metal parts when you are
cleaning the underfloor, the inside of
the wheel housings or
the wheel trims -
risk of cuts.
Caution
•
Do not wash your vehicle in bright
sunlight - risk of paint damage.
•
Ensure that the jet of water is not aimed di
rectly at the locking cylinders or at the
door and panel joints if you spray your vehi
cle in winter down with a hose - risk of
freezing.
•
Do not use any insect sponges, rough kitc
hen sponges or similar cleaning products
- risk of damage to the surface of paintwork.
For the sake of the environment
Only wash your vehicle at wa
shing bays specifically reserved for this purpose. This
ensures that no water which may be contaminated by oil flows into the sewage system. It is not even permitted to wash your vehicl
e in certain areas except at such specific
washing bays.Washing with a high-pressure cleanerWhen you wash your vehicle with a high-press
ure cleaner, it is essential to comply with
the instructions for use of the cleaning equi
pment. This applies in particular to the
pressure
used and to the
spraying distance
. Maintain a sufficiently large distance to
soft materials such as rubber hoses or insulation material. On no account use
circular spray nozzles
or so-called
dirt cutters
!
WARNING
It is particularly important that you do not clean tyres with circular spray jets. Visible but also invisible
damage to tyres may occur ev
en at a relatively large
spraying distance and if sprayed only for a short time - risk of accident!
Caution
The water containing wax must be no hotter
than 60°C, otherwise the vehicle can be
damaged.Wax treatmentGood wax treatment is an effective way of
protecting the paintwork from harmful envi-
ronmental influences and
minor mechanical damage.
The vehicle must be treated with a high-quali
ty hard wax polish at the latest, when no
more drops form on the clean paintwork.
sgg.6.book Page 194 Thursday, September 24, 2009 2:32 PM