
Driving and the Environment
204
Avoiding full throttle Driving more slowly means saving fuel.Sensitive use of the accelera
tor will not only significantly reduce fuel consumption
but also positively influence environmen
tal pollution and wear of your vehicle.
You should avoid fully exploi
ting the top speed of your vehicle wherever possible.
Fuel consumption, pollutant emissions and vehicle noises increase disproportion- ally at high speeds. The
⇒fig. 195
shows the ratio of fuel consumption to 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 length
y red phase. Even after just 30 - 40 seconds
you will have saved more fuel than 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 em
issions, 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 re
volutions 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 moto
ring even before you set off on your
journey. Keeping your vehicle properly servic
ed not only 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 fu
el 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 consid-
erable extent on the load and speed of
the engine. Oil consum
ption could be as
high as 0.5 litres/1 000 km depending on your style of driving. It is quite normal that a new engine ha
s a higher oil consumption at first, and
reaches its lowest level only
after a certain running in
time. It is therefore not
possible to correctly assess the oil cons
umption of a new 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 car at regula
r intervals to detect any leakages in
good time. Please have your
vehicle inspected by a specialist garge if you find any
stains caused by oil or
other fluids on the floor.
Fig. 195 Fuel consumption in litres/100 km. and speed in km/h.
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Inspecting and replenishing
223
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
WARNING
•
Never open the bonnet if you see that steam or coolant is flowing out of
the engine compartment - risk of scaldi
ng! Wait long enough until the steam
or coolant has stopped escaping.•
For safety reasons, the bonnet must always be properly closed when
driving. One should therefore check that
the lock has in fact engaged prop-
erly after closing the bonnet.•
Stop your vehicle immediately while driv
ing if you notice that the lock is
not properly engaged and close the bonne
t properly - risk of an accident!
Caution
Ensure that the arms of the windscreen
wipers are correctly
in place against the
windscreen before opening the bonnet otherwise damage could occur to the paintwork.Working in the engine compartment Particular care is required when carrying out any work in the engine compartment!There is a risk of injuries, scalding,
accidents and fire when working in the
engine compartment, e.g. inspecting and replenishing oil and other fluids. For this reason, it is essential to comply with the warning instructions stated below and with the general applicable
rules of safety. The engine compart-
ment of your car is a hazardous area
⇒
.
WARNING
•
Never open the bonnet if you see that steam or coolant is flowing out of
the engine compartment - risk of scaldi
ng! Wait long enough until the steam
or coolant has stopped escaping.•
Switch off the engine and pull out the ignition key.
•
Apply the handbrake firmly.
•
If your vehicle is fitted with a ma
nual gearbox, move the gearshift lever
into Neutral, or if it is fitted with
automatic gearbox, move the selector lever
into position P.•
Allow the engine to cool down.
•
Keep children clear of the engine compartment.
•
Never spill oil and other fluids over the hot engine. Such fluids (e.g. the
antifreeze contained in the coolant) may ignite!•
Avoid short circuits in the electrical system - particularly on the battery.
•
Never place your hand into the radiator fan as long as the engine is still
warm. The fan might suddenly start running!•
Never open the cap of the coolant expa
nsion bottle as long
as the engine
is still warm. The cooling system is pressurized!•
Cover over the cap of the coolant expansion reservoir with a large cloth
when opening it as protection for your
face, hands and arms from hot steam
or hot coolant.•
Do not let objects, such as e.g cleani
ng cloth or tools lie in the engine
compartment.•
If you wish to work under the vehicle, you must secure the vehicle from
rolling away and support it with suitable supporting blocks: the car jack is not sufficient for this - risk of injury!•
In cases where it be necessary to carry out inspection work when the
engine is running there is an additional risk from rotating parts (e.g. the V- ribbed belt, alternator, radiator fan) and from the high-voltage ignition system. Please observe in addition the following.
− Never touch the electrical cabl
es of the ignition system.
− Absolutely avoid any jewellery, loose items of clothing or long hair from getting into the rotating parts of the engine - Hazard! Therefore remove any jewellery beforehand, tie up your hair and wear tight fitting clothing.
•
Please also comply with the warnin
g instructions stated below when
carrying out any essential work on th
e fuel system or on the electrical
system.
WARNING (continued)
s2dk.1.book Page 223 Wednesday, April 8, 2009 12:23 PM

Inspecting and replenishing
224
−Always separate the car batter
y from the electrical system.
− Do not smoke. − Never carry out any work close to naked flames. − Always keep a working fire
extinguisher at hand.
Caution
When replenishing fluids in the engine, always ensure that the fluids are on no account mixed up. This may result in ma
jor operating problems and also vehicle
damage!Overview of the engine compartment The main inspection pointsFig. 202 Diesel engine 1.9 litre/77 kW
Coolant expansion bottle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Windshield washer fluid reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine oil filler opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine oil dipstick . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brake fluid reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery (below a cover) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Note
The location of the inspection points in
the engine compartment of petrol and
diesel engines is practically identical.Engine oilCheck engine oil level The dipstick indicates the level of oil in the engine.Checking the oil level – Ensure that the vehicle is positioned on a level surface. – Switch the engine off. – Open the bonnet
⇒
page 223.
WARNING (continued)
A1
227
A2
234
A3
225
A4
224
A5
228
A6
229
Fig. 203 Dipstick
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Inspecting and replenishing
225
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
– Wait a few minutes and pull out the oil dipstick. – Wipe off the dipstick with a clea
n cloth and insert it again fully.
– Then withdraw the dipstick ag
ain and read off the oil level.
Oil level within range – You must
not
top up the oil.
Oil level within range – You
may
top up the oil. It is possible that the oil level may then be
within range after doing this.
Oil level within range – You
must
top up the oil
⇒
page 225. It is sufficient, once this is done,
to keep the oil level within range .
It is normal for the engine to consume oi
l. The oil consumption may be as much as
0.5 l/1 000 km depending on your style of
driving and the conditions under which
you operate your vehicle. Th
e oil consumption may be sl
ightly higher than this
during the first 5 000 kilometres. One should therefore check the oil level at regular intervals, preferably every time after the fuel tank is filled or after driving for long stretches. We recommend maintaining the oil level within the range -
but not above this
,
if the engine has been operating at high loads, for example during a lengthy motorway trip during the
summer months, towing a trai
ler or negotiating a high
mountain pass. The warning light in the instrument cluster* will indicate
⇒page 42, “Engine oil
level
” whether the oil level is too low. In this case, check the oil level as soon as
possible. Top up with an appropriate quantity of oil.
Caution
•
The oil level must on no account ex
tend beyond the ra
nge . Danger of
damaging the catalytic converter.
•
Do not continue your journey
if for some reason it is not possible under the
conditions prev
ailing to top up with oil.
Switch of the engine and contact
and
obtain professional assistance from a specialist garage.
Note
Engine oil specifications
⇒page 270.
Replenishing engine oil– Inspecting the engine oil level
⇒
page 224.
– Unscrew the cap of the engine oil filler opening.– Pour in a suitable grade of oil in portions of 0.5 litres
⇒
page 270.
– Inspect the oil level
⇒
page 224, “Check engine oil level”.
– Carefully screw on the cap of the filler opening and push the dipstick
in fully.
WARNING
•
Avoid dripping oil onto hot parts of the engine when topping up will oil -
a risk of fire!•
Read and observe the warning notes
⇒page 223, “Working in the engine
compartment” before working in the engine compartment.
For the sake of the environment
The oil level must on no account be above the range
⇒page 224. Oil will other-
wise be drawn in through the crankcas
e ventilation and may pass through the
exhaust system to atmosphere. The oil ma
y combust in the catalytic converter and
damage it.
AAAB
AA
AC
AB
AA
AA
Aa
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Inspecting and replenishing
227
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Caution
•
Other coolant additives may cause operational problems which, in partic-
ular, involves significantly redu
cing the anticorrosion effect.
•
Any faults or problems resulting from corrosion may cause a loss of
coolant and, as a consequence of th
is, result in major engine damage.
Inspecting the coolant levelThe coolant expansion bott
le is located in the engine compartment on
the right. – Switch the engine off. – Open the bonnet
⇒
page 223, “Working in the engine compartment”.
– Check the level of coolant in
the coolant expansion bottle
⇒
fig. 204
.
The coolant level when the engine is cold must lie between the (MIN) and (MAX) markings. The level may also rise slightly above the (MAX) marking when the engine is warm.
If the coolant level in the reservoir is too low, this is indicated by the warning light in the instrument cluster
⇒page 38. We nevertheless recommend inspecting
the coolant level directly at the reservoir from time to time.
Loss of coolant A loss of coolant is first and foremost an
indication of a leak
in the system. You
should not merely top up the coolant in the
reservoir. It is also important to have
the cooling system inspected without delay by a specialist garage. Losses can only occur through the pressure relief in the cap of the coolant expan- sion bottle which is completely free of leak
s if the coolant boils as a result of over-
heating and is forced out of the cooling system.
WARNING
Read and observe the warning notes
⇒page 223, “Working in the engine
compartment” before working in the engine compartment.
Caution
One should contact a specialist garage as
soon as possible if the source of over-
heating itself cannot be determined
and removed, since there may be grave
damage to the engine.Replenishing the coolant– Switch the engine off. – Allow the engine to cool down.– Place a cloth over the cap of the coolant expansion reservoir
⇒
fig. 204
and unscrew the cap
carefully
by turning it to the left
⇒
.
– Top up the coolant. – Screw the cap tight until it is heard to lock.The coolant which you use for replenishi
ng the system, must comply with one
specific specification
⇒page 226, “Coolant”. Do not use an alternative additive if
the coolant additive G12 PLUS is not available in exceptional cases. Just top up the
Fig. 204 Engine compart- ment: Coolant expansion bottle
Ab
Aa
Aa
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Wheels and Tyres
235
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Wheels and TyresWheelsGeneral information•
New tyres do not offer optimal grip at first and should therefore be run in for
about 500 km at a moderate speed and an
appropriately cautious style of driving.
You will also profit from longer tyre life.•
The tread depth of new tyres may differ
because of design features and the
configuration of the tread (depending on
the type of tyre and the manufacturer).
•
Drive over curbs on the side of the road
and other such obstacles slowly and,
where possible, at a right angle in order to avoid damage to tyres and wheel trims.•
Inspect your tyres from time to time
for damage (punctures, cuts, splits and
bulges). Remove foreign bodies from the tyre profile.•
Damage to tyres and wheels is frequent
ly not visible. Unus
ual vibrations or
pulling of the vehicle to one side
could be a sign of tyre damage.
Please reduce
your speed immediately and stop if
you suspect that a wheel is damaged.
Inspect the tyres for signs of damage (bulges,
splits, etc.). If no
visible damage is
present, please drive at an appropriatel
y slow speed and carefully to the nearest
specialist garage in order to have your vehicle inspected.•
Also protect your tyres from contact with oil, grease and fuel.
•
Immediately replace any dust caps of the valves which have got lost.
•
Mark wheels before removing them so th
at their previous direction of running
can be maintained when mounted them again.•
Always store wheels or tyres which been removed in a cool, dry and, where
possible, dark place. Tyres which are not fixed to a wheel trim should be stored upright. Unidirectional tyres* The direction of rotation of the tyres is marked by arrows on the wall of the tyre. This indicates the direction of rotation of the tyre, and it is essential that the tyres are fitted on to run in this direction. Only then
are the tyres able to provide the optimal
properties in terms of grip, low noise, wear-and-tear and aquaplaning.
Further information concerning
the use of unidi
rectional tyres
⇒page 239.
WARNING
•
New tyres during the first 500 km do not offer optimal grip and should
therefore be run appropriately - risk of accident!•
Never drive with damaged tyres - risk of accident!Note
Please observe the various differing legal requirements regarding tyres.Tyre lifeThe life of your tyres very much depends on the following points: Tyre pressure The working life of tyres will be shortened considerably if the tyres are insufficiently or over-inflated and this will have an advers
e effect on the handli
ng of your vehicle.
Correctly inflated tyres are of partic
ular importance when travelling at
high speeds
.
It is therefore good to check the pressure at least once a month and also before
Fig. 210 An opened fuel filler flap with a tyre size and tyre inflation pressure table
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Breakdown assistance
246
•
Never start the engine with the vehicle
sitting on the raised jack - danger
of suffering injury!
Caution
If you have to change a wheel on a slope
first block the opposite wheel with a stone
or similar object in order to secure th
e vehicle from unexpectedly rolling away.
Note
Comply with the national legal regulations.Changing a wheelAlways change a wheel on a level surface as far as possible. – Take off the full wheel trim*
⇒
page 247 or the caps
⇒
page 247.
– In the case of light alloy wheels remove the wheel trim cap
⇒
page 248.
– First of all slacken the safety wh
eel bolt * and afterwards the other
wheel bolts
⇒
page 248.
– Jack up the vehicle until the wheel to
be changed is clear of the ground
⇒
page 249.
– Unscrew the wheel bolts and place them on a clean surface (cloth,
paper etc.).
– Take off the wheel. – Fit on the spare wheel and tighten the wheel bolts slightly. –Lower the car.
– Tighten the wheel bolts firmly, al
ternately and diagonally using the
wheel wrench (crosswise) and last the safety wheel bolt*
⇒
page 248.
– Mount the full wheel trim/w
heel trim cap or the caps.
Note
•
All bolts must be clean
and must turn easily.
•
You must never grease or oil the wheel bolts!
•
When fitting on unidirectional tyres, ensure that the tyres rotate in the correct
direction
⇒page 235.
Subsequent stepsAfter changing the wheel, you must perform the following steps. – Stow and attach the replaced wheel in the spare wheel well using a
special screw
⇒
page 245, fig. 216
.
– Stow the vehicle tool kit in the space provided.–
Check
the
tyre pressure
on the spare wheel just mounted as soon as
possible.
– Have the
tightening torque
of the wheel bolts
checked
with a torque
wrench as soon as possible. Steel and light alloy wheels must be tight-ened to a tightening torque of
120 Nm
.
– Have the defective tyre repaired as soon as possible.
WARNING
It is necessary to observe the guidelines given on
⇒page 237 if the vehicle is
subsequently fitted with tyres which are
different to those it was fitted with
at the works.
WARNING (continued)
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Technical Data
279
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Capacities (in liter) Weight (in kg)Fuel tank capacity/of which spare
60/9
Reservoir for windscreen washer system/ with headlight cleaning system
3/5,5
Engine oil
a)
a)Oil capacity with oil filter change. Inspect oil level when fi
lling; do not fill up too much. The oil level must be between the
markings
⇒page 224, “Check engine oil level”.
3,8/4,3
b)
b)Ve hicles w ith DP F.Cooling system of the vehicle
c)
c)On vehicles which are fitted with an indepe
ndent auxiliary heating and ventilation, the
volume of the coolant is greater by app
rox. 1 ltr.
8,4
M5
M5 Green Line
Permissible gross weight
2076
2063
Unloaden weight ready for work
1513
1518
Loading capacity
563
545
Loading capacity when using the TLC
488
470
Permissible front axle load
1200
1200
Permissible rear axle load
1250
1230
Permissible trailer loads, trailer braked
1500
a)
1700
b)
a)Uphills up to 12 %b)Uphills up to 8%
1500
a)
1700
b)
Permissible trailer loads, trailer unbraked
650
650
s2dk.1.book Page 279 Wednesday, April 8, 2009 12:23 PM