cooling MERCEDES-BENZ A-CLASS HATCHBACK 2008 User Guide

Engine compartment
175H
Environmental note
When topping up the oil, take care not to
spill any. Oil must not be allowed to escape
into the soil or waterways. You would oth-
erwise be damaging the environment.
For further information on engine oil
(Y page 296). Coolant
G
Risk of injury
The cooling system is pressurised. There-
fore, only unscrew the cap once the engine
has cooled down. The coolant temperature
gauge must display less than 70 °C. You
could otherwise be scalded by escaping hot
coolant.
Coolant consists of water and antifreeze/cor-
rosion inhibitor. Only check the coolant level
when the vehicle is on a level surface and the
engine has cooled down. Checking the coolant level The coolant expansion tank is located in the
engine compartment on the right when
viewed in the direction of travel.
1
Cap
2 Coolant expansion tank
3 Marker bar
X Slowly turn cap 1half a turn anti-clock-
wise to allow excess pressure to escape.
X Turn cap 1further anti-clockwise and
remove it.
There is sufficient coolant in expansion
tank 2if the coolant is level with marker
bar 3in the filler neck when cold or
approximately 1.5 cm higher when hot. X
Top up the coolant if necessary.
X Replace cap 1and tighten all the way to
the stop.
For further information on coolant see
(Y page 297) . Windscreen washer system/head-
lamp cleaning system*
The washer fluid reservoir is located in the
engine compartment on the left-hand side of
the vehicle when viewed in the direction of
travel. The headlamp cleaning system is also
supplied from the washer fluid reservoir. 1
Cap
X Add windscreen washer concentrate to the
washer fluid all year round. Operation
* optional
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Troubleshooting
222 Troubleshooting
Points to remember
G
Risk of accident and injury
If maintenance work is carried out incorrectl y this can jeopardise the operating safety of your vehicle. You risk losing control of your vehicle
and thereby causing an accident. The safety systems may also no longer be able to protect you or others as they are designed to do.
Always have maintenance work carried out at a qualified specialist workshop which has the necessary specialist knowledge and tools to
carry out the work required.
Mercedes-Benz recommends that you use a Mercedes-Benz Service Centre for this purpose.
In particular, all work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop. Warning and indicator lamps in switches and buttons
Problem Possible cause/consequence Suggested solutions
One or all of the indicator lamps
in the seat heating* button are
flashing. The seat heating* has
switched itself off automatically. The on-board voltage is too low,
because too many consumers are
switched on. X
Switch off consumers that are not required, e. g. reading lamp or
interior lighting.
Once the battery is sufficiently charged, the seat ventilation* will
switch back on automatically. The indicator lamp in the
2
button on the air-conditioning*/
Thermotronic* control panel
lights up. The cooling system can-
not be switched on. Cooling has been deactivated
due to a malfunction. X
Visit a qualified specialist workshop. Practical advice
* optional
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Trailer coupling*
290 Trailer coupling*
Mounting dimensions
G
Risk of accident
Only have a trailer tow hitch retrofitted at a
qualified specialist workshop which has the
necessary specialist knowledge and tools
to carry out the work required. Mercedes-
Benz recommends that you use a
Mercedes-Benz Service Centre for this pur-
pose. In particular, work relevant to safety
or on safety-related systems must be car-
ried out at a qualified specialist workshop.
! If you have a trailer tow hitch retrofitted,
changes to the cooling system may be nec-
essary, depending on the vehicle type. If you have a trailer tow hitch retrofitted,
observe the anchorage points on the chas-
sis frame.
Anchorage points for the trailer coupling
1
Anchorage points
2 Overhang dimension
3 Rear axle centre line For trailer couplings fitted at the factory, the
overhang dimension is 749 mm.Te
chnical da ta
* optional
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Service products and capacities
297
!
Engine oils for vehicles without a diesel
particle filter may also be used temporarily in vehicles with a diesel particle filter if the
engine oil listed is not available. You must
then have an oil change carried out as soon
as possible.
Capacities The following values refer to an oil change including the oil filter.
Engine with oil filter A 150
A 150 BlueFFICIENCY A 170
A 170 BlueFFICIENCY A 200 A 200 TURBO
Replacement amount
5.0 l 5.0 l 5.0 l 5.0 l
Engine with oil filter A 160 CDI
A 160 CDI BlueFFICIENCY A 180 CDI A 200 CDI
Replacement amount
5.8 l 5.4 l 5.4 l
Coolant
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the
following tasks:
R anti-corrosion protection
R antifreeze protection
R raising the boiling point
i When the vehicle is first delivered, it is
topped up with a coolant that will ensure
adequate antifreeze and corrosion protec-
tion. !
Only top up with coolant that has been
premixed with the desired antifreeze pro-
tection. You could otherwise damage the
engine.
More information on coolant and refilling
can be found in the Mercedes-Benz Speci-
fications for Service Products, sheet no.
310.1 and is available from any Mercedes-
Benz Service Centre. !
Always use a suitable coolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the cooling system will not be
sufficiently protected from corrosion, and
the boiling point will be too low.
If antifreeze/corrosion inhibitor is present in
the correct concentration, the boiling point of
the coolant will be around 130 °C.
The antifreeze/corrosion inhibitor concentra-
tion in the cooling system should: Technical data
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Service products and capacities
298
R
be at least 50%. This will protect the cooling
system against freezing down to around –
37 °C.
R not exceed 55% concentration (antifreeze
protection down to –45 °C); otherwise,
heat will not be effectively dissipated.
If the vehicle has lost coolant, top it up with
equal amounts of water and antifreeze/cor-
rosion inhibitor. Mercedes-Benz recom-
mends an antifreeze/corrosion inhibitor
which has been approved for Mercedes-Benz.
! The cooling system contains a filling
which must be renewed after 15 years, or
after 250, 000 km at the latest.
The warranty is only valid if you top up with
an antifreeze/corrosion inhibitor which
has been approved by Mercedes-Benz, and
observe the recommended mixing ratios. Technical data
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Service products and capacities
299
Capacities The following values indicate the total cooling system capacities.
A 150
Manual trans- mission A 150
BlueEFFICIENCY A 150
AUTOTRONIC* A 170
Manual trans- mission A 170
BlueEFFICIENCY A 170
AUTOTRONIC* Coolant
6.3 l 6.3 l 6.5 l 6.3 l 6.3 l 6.6 l
Amount of antifreeze/corrosion inhibitor required for antifreeze protection
Down to –37 °C
(approx. 50%)
3.2 l 3.2 l 3.25 l 3.2 l 3.2 l 3.3 l
Down to –45 °C
(approx. 55%)
3.5 l 3.5 l 3.6 l 3.5 l 3.5 l 3.65 l
A 200 A 200
TURBO A 160 CDI
Manual transmission A 160 CDI
AUTOTRONIC* A 180 CDI A 200 CDI
Coolant
6.6 l 8.5 l 8.4 l 8.0 l 9.7 l
Amount of antifreeze/corrosion inhibitor required for antifreeze protection
Down to –37 °C
(approx. 50%)
3.3 l 4.25 l 4.2 l 4.0 l 4.85 l
Down to –45 °C
(approx. 55%)
3.65 l 4.7 l 4.6 l 4.4 l 5.35 lTechnical data
* optional
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