Inspecting and replenishing
160
– Take the bonnet support out of its holder and set it in the opening
designed for it
⇒
page 159, fig. 150
.
Closing the bonnet – Lift the bonnet slightly and unhook the bonnet support. Press the
bonnet support into the hold
er designed to hold it.
– Allow the bonnet to drop from a height of about 30 cm into the lock -
bonnet
do not press down on it
!
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 i
mmediately while driving if yo
u notice that the lock is
not properly engaged and close the bonn
et properly - risk of an accident!
Working in the engine compartment Particular care is required when ca
rrying out any work in the engine
compartment!There is a risk of injuries, scalding,
accidents and fire wh
en working in the
engine compartment, e.g. inspecting an
d 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.
•
On vehicles fitted with a manual gearbox, move the gearshift lever into
Neutral.•
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 cleaning cloth or tools lie in the engine
compartment.•
If you wish to work under the vehicl
e, you must secure the vehicle from
rolling away and support it
with suitable supporting blocks; the lifting 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 part
s of the engine - Hazard! Therefore
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Inspecting and replenishing
161
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
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 the
fuel system or on
the electrical
system:
− 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, al
ways 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 points.Fig. 151 1.6 ltr./75 kW petrol engine1.6 ltr./75 kW petrol engine
⇒fig. 151
Coolant expansion bottle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reservoir for hydraulic liquid of power steering Windshield washer fluid reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine oil dipstick . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine oil filler opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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.
WARNING (continued)
A1
165
A2A3
172
A4
163
A5
163
A6
167
A7
168
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166
The coolant expansion bottle is loca
ted in the engine compartment on
the right. – Switch the engine off. – Open the bonnet
⇒
in “Working in the engine compartment” on
page 160.
– Check the level of coolant in the coolant expansion bottle
⇒
page 165, fig. 154
. When the engine is cold, the coolant level must
lie between the and markings. When the engine is warm, the level may also lie slightly above the hatched part.
If the coolant level in the reservoir is too low, this is indicated by the warning light in the instrument cluster
⇒page 30. We nevertheless recommend inspecting
the coolant level directly at th
e 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 160, “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
⇒
page 165, fig. 154
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 replenishing the system, must comply with one specific specification
⇒page 165, “Coolant”. Do not use an alternative additive if
the coolant additive G12 PLUS - PLUS is not av
ailable in exceptional cases. Just top
up the system with water and as soon as possible arrange adjustment to correct the mixing ratio of water and coolant additive again by a specialist garage. Only use fresh coolant for topping up the system.Do not top up the fluid above the hatched
part! Excess coolant which is heated up
is forced out of the cooling system through the pressure relief valve in the cap of the coolant compensation bottle. Wait until the engine has cooled down for a system which has suffered a major loss of coolant before pouring in coolant. This is necessary to avoid engine damage.
WARNING
•
The cooling system is pressurized! Do not open the cap of the coolant
expansion bottle if the engine is
still hot - risk of scalding!
•
The coolant additive and thus all of the coolant is harmful to your health.
Avoid contact with the coolant. Coolant vapours are also harmful to the health. It is important, therefore, to always safely store any coolant additive in its original container out of the reach of children - risk of poisoning!•
If any splashes of coolant get into yo
ur eyes, rinse out
your eyes immedi-
ately with clear water and contact a doctor as soon as possible.
Aa
Ab
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167
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
•
You should also consult a doctor without delay if you have inadvertently
swallowed coolant.
Caution
Do not continue your journey if for some reason it is not possible under the conditions prevailing to top up with coolant. Switch the engine off
and obtain
professional assistance from a specialist garage, otherwise it could lead to severe engine damage.
For the sake of the environment
Do not re-use coolant if it is necessary to
drain the coolant in the system. It should
be collected and disposed of in comp
liance with environmental protection
regulations.Radiator fan The radiator fan may switch on suddenly.The radiator fan is driven by an electr
ic motor and controlled according to the
coolant temperature. The radiator fan may continue running fo
r up to 10 minutes after the engine has
been switched off - even if
the ignition is also off. It
may also switch on suddenly
after a certain time, if•
the coolant temperature has risen beca
use of an accumulation of heat or
•
the warm engine compartment is heated
up additionally by
strong sunlight.
WARNING
You must therefore be aware when work
ing in the engine compartment that
the fan may switch on suddenly - risk of injury!
Brake fluidInspecting the brake fluid levelThe brake fluid reservoir is located on the left of the engine compartment. The brake fluid reservoir on right-hand steering models is positioned on the other side of the engine compartment. – Switch the engine off.– Open the bonnet
⇒
in “Working in the engine compartment” on
page 160.
– Inspect the brake fluid level in the reservoir
⇒
fig. 155
. The level must
be between the “MIN” and “MAX” markings.
A slight drop in the fluid level results when driving due to normal wear-and-tear and automatic adjustment of the br
ake pads, and is perfectly normal.
There may be an indication of a leak in the brake system, however, if the fluid level drops significantly within a short time or if it drops below the “MIN” marking. A situ- ation where the brake fluid level is too low is indicated by the warning light
lighting up in the instrument cluster
⇒page 34. In this case
stop immediately and
do not drive any further! Obtain professional assistance.
WARNING (continued)
Fig. 155 Engine compart- ment: Brake fluid reservoir
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