2008 MERCEDES-BENZ B-CLASS HATCHBACK engine

Loading and stowing
155Removing/fitting the removable
front-passenger seat*
Removing the front-passenger seat !
To avoid damage, the head restraint must
be pushed in fully before the front-
passenger seat is removed. 1
Connector
2 Lever
! Do not operate the lever until you have
pulled out the connector. The use of force
when opening will cause damage to
mechanical and electronic components. X
Move the front-passenger seat to its rear-
most position.
X Disconnect connector 1.
A signal sounds. The lock for lever 2is
released. If the engine is running, the
5 PASSENGER AIRBAG OFF warning
lamp flashes and the 1warning lamp
lights up after a short time.
X Move the front-passenger seat to its centre
position.
It is only possible to remove the seat with-
out tilting it when it is in this position
X Store connector 1under the seat in such
a way that the cable does not get caught
on the seat frame. 1
Connector
2 Lever
3 Cable box
X Swing lever 2forwards and pull upwards.
The seat slides out of the front mounting
cups.
X Take hold of the seat at the back of the
backrest and at the front edge of the seat
cushion.
X Guide the seat through the front-passenger
door opening. Controls
* optional
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Loading and stowing
156
X
Open cable box 3and place connector
1 inside.
X Close cable box 3. G
Risk of injury
The front-passenger seat which has been
removed contains an active sidebag. Do not
attach a power source to the connector on
the seat, otherwise the airbag could inflate.
Store the seat out of the reach of children.
Fitting the front-passenger seat G
Risk of injury
The mounting cups must be free from dirt
and other items in order for the front-
passenger seat to engage securely.
You must connect up the connector, so that
the front-passenger airbag can deploy in
the event of an accident.
If it is not connected and the engine is run-
ning, the 5PASSENGER AIRBAG OFF
warning lamp flashes and the 1warning
lamp lights up after a short time. 1
Rear mounting cups
2 Front mounting cups
3 Connector
4 Cable box
5 Lever
6 Seat frame
X Take connector 3out of cable box 4and
place it at the front.
X Take hold of the seat at the back of the
backrest and at the front edge of the seat
cushion. X
Guide the seat through the front-passenger
door opening.
X Move the seat into position over the mount-
ing cups.
X Insert the seat hook into rear mounting
cups 1.
X Push the front of the seat down until it
engages.
Lever 5springs back to its starting posi-
tion. Only then is the seat correctly locked
in position.
X Route connector 3over seat frame 6.
X Insert connector 3into the coupling on
the seat. G
Risk of injury
Before starting off, make sure that the seat
has engaged properly. Controls
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167
Running-in notes
............................... 168
Refuelling ........................................... 168
Engine compartment ........................171
Tyres and wheels .............................. 176
Winter driving ................................... 181
Driving tips ........................................ 183
Driving abroad ................................... 185
Trailer towing* .................................. 186
Service ............................................... 191
Care .................................................... 192 Operation
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Refuelling
168 Running-in notes
The first 1,500 km
If you treat the engine with sufficient care
from the very start, you will be rewarded with
excellent performance for the remainder of
the engine's life.
R You should therefore drive at varying road
and engine speeds for the first 1,500 km.
R Avoid heavy loads, e.g. driving at full throt-
tle, during this time. Do not exceed 2
/ 3 of
the maximum permissible engine speed for
each gear.
R Change gear in good time.
R Do not shift down a gear manually in order
to brake.
Vehicles with AUTOTRONIC*:
R Try to avoid depressing the accelerator
pedal beyond the pressure point (kick-
down).
R Only use ranges 3,2or 1for slow driving,
e.g. in mountainous terrain.
After 1,500 km you may gradually bring the
vehicle up to full road and engine speeds. Refuelling
Refuelling
G
Risk of explosion
Fuel is highly flammable. Fire, naked flames
and smoking are therefore prohibited when
handling fuels.
Switch off the engine before refuelling. G
Risk of injury
Avoid any contact with fuels.
You can damage your health if your skin
comes into direct contact with fuel or if you
inhale fuel vapours. G
Risk of fire
Do not use petrol to refuel vehicles with a
diesel engine. Never mix diesel with petrol.
This causes damage to the fuel system and
engine and could result in the vehicle catch-
ing fire.
! Do not use petrol to refuel vehicles with a
diesel engine. Do not use diesel to refuel
vehicles with a petrol engine. Even a small
quantity of the wrong fuel will damage the
injection system. Damage resulting from
adding the wrong fuel is not covered by the
warranty. !
Do not start the engine if you accidentally
refuel with the wrong fuel. Otherwise, the
fuel could enter the fuel lines. This would
require draining of the fuel tank and fuel
lines. Notify a qualified specialist workshop
and have the fuel tank and fuel lines
drained completely.
When you open or close the vehicle with the
key, the fuel filler flap is automatically
unlocked or locked.
The position of the fuel filler cap is to the rear
on the right. The fuel tank filler flap is shown
in the instrument cluster 4. The arrow on
the filling pump indicates the side of the vehi-
cle. 1
To open the fuel filler flap
2 To insert the fuel cap Operation
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Refuelling
169
3
Tyre pressure table
4 Fuel type
X To open: press the fuel filler flap in the
direction of arrow 1.
X Turn the fuel filler cap to the left and
remove it.
X Insert the fuel filler cap into the holder
bracket on the inside of filler flap 2.
X Only fill the tank until the pump nozzle
switches off.
! Overfilling the fuel tank could damage the
fuel system.
X To close: replace the fuel filler cap and turn
it clockwise. The fuel filler cap audibly
engages.
X Close the fuel filler flap.
i Vehicles with a diesel engine:
if the fuel tank has been run completely dry,
it will be necessary to bleed the fuel system
(Y page 232). Petrol (EN 228)
! Refuel using only unleaded premium
grade petrol with a minimum octane num-
ber of 95 RON/85 MON conforming to
European standard EN 228.
You could otherwise impair engine output
or damage the engine.
i As a temporary measure, only when the
recommended fuel is not available, you
may also use regular unleaded petrol,
91 RON/82.5 MON. This may reduce
engine performance and increase fuel con-
sumption. Avoid driving at full throttle.
In some countries, the available petrol qual-
ity may not be adequate and could cause
coking around the inlet valve. In such
cases, and in consultation with a
Mercedes-Benz Service Centre, the petrol
may be mixed with the additive recommen-
ded by Mercedes-Benz (part no.
A000989254510). You must observe the
notes and mixing ratios specified on the
container.
For further information on "Fuel" see
(Y page 291). Turbo engines !
Refuel using only unleaded Super Plus
with a minimum octane number of
98 RON/88 MON conforming to European
standard EN 228.
You could otherwise impair engine output
or damage the engine.
i If the recommended fuel is not available
and only as a temporary measure, you may
also use premium unleaded petrol,
95 RON/85 MON. This may reduce engine
performance and increase fuel consump-
tion. You must avoid driving at full throttle. Diesel (EN 590)
! Only use diesel that complies with the
EN 590 European standard.
You could otherwise impair engine output
or damage the engine.
You will find further information about die-
sel under "Fuel" in the index.
! When refuelling vehicles with a diesel par-
ticle filter in countries outside the EU, only
low-sulphur Euro diesel with less than
0.005 percent sulphur content by weight
should be used. In countries in which diesel Operation
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Refuelling
170with a higher sulphur content is available
(e.g. 0.035 percent by weight), the engine
oil should be renewed at more frequent
intervals. More information about intervals
for changing the engine oil can be obtained
from any Mercedes-Benz Service Centre.
! Using fuel that does not comply with
EN 590 can increase wear and damage the
engine and the exhaust system.
Do not use the following:
R marine diesel
R heating oil
R bio-diesel
R vegetable oil
R petrol
R paraffin
R kerosene
Do not add such fuels to diesel fuel and do
not use any special additives (exception:
flow improvers – see "Low outside temper-
atures").
Damage caused by the use of unapproved
fuels or additives is not covered by the war-
ranty. For further information on "Fuel" see
(Y
page 291).
Low outside temperatures The flow properties of diesel may be inade-
quate at low ambient temperatures.
To prevent operating problems, diesel fuel
with improved cold flow qualities is available
during the winter months. Your vehicle must
be refuelled with this winter diesel at temper-
atures of -5 °C or below.
You can use this winter diesel at tempera-
tures down to about -20 °C without problems.
If only summer diesel fuel or less cold-resist-
ant winter diesel fuel (e.g. in Mediterranean
regions) is available, you should add an
amount of flow improver to the fuel corre-
sponding to the outside temperature.
Mix the additive with the diesel in good time,
before the flow properties of the diesel
become inadequate. Otherwise, malfunctions
can only be rectified by heating the entire fuel
system, e.g. by parking the vehicle in a heated
garage. G
Risk of fire
Do not use petrol to refuel vehicles with a
diesel engine. Never mix diesel with petrol. This would damage the fuel system and
engine and could result in a vehicle fire.
Flow improver
The effectiveness of a flow improver is not
guaranteed with every fuel. Observe the infor-
mation provided by the manufacturer when
using a flow improver. Only use flow improv-
ers that have been tested and approved by
Mercedes-Benz. Information about flow
improvers that have been tested and
approved by Mercedes-Benz can be obtained
from any Mercedes-Benz Service Centre. Operation
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Engine compartment
171Engine compartment
Bonnet
G
Risk of accident
Do not pull the release lever while the vehi-
cle is in motion. If you do so, the bonnet
may open up and block your view.
Opening G
Risk of injury
There is a risk of injury if the bonnet is open,
even if the engine is not running.
Some engine components can become
very hot.
To avoid the risk of burns, only touch those
components described in the Owner’s Man-
ual and observe the relevant safety notes. G
Risk of injury
The radiator fan between the radiator and
the engine can start automatically, even if
the key has been removed from the ignition
lock. For this reason, you must not reach
into the fan rotation area. Otherwise, you
could be injured. Vehicles with a petrol engine:
The electronic ignition system uses high
voltage. For this reason, you must never
touch components of the ignition system
(ignition coil, ignition cable, spark plug con-
nector or test socket) when:
R
the engine is running.
R the engine is being started.
R the ignition is switched on and the engine
is being cranked by hand.
Vehicles with a diesel engine:
The electronic injection control uses high
voltage. Therefore, never touch fuel injec-
tion system components when:
R the engine is running.
R the engine is being started.
R the ignition is switched on.
X Make sure that the windscreen wipers are
switched off. G
Risk of injury
The windscreen wipers and wiper linkage
could be set in motion.
When the bonnet is open, you or others
could be injured by the wiper rods. Make sure that the windscreen wipers are
switched off and that the key has been
pulled out of the ignition lock before open-
ing the bonnet.
The bonnet release lever is located in the
driver's footwell. 1
Bonnet release lever
X Pull bonnet release lever 1.
The bonnet is released.
! Make sure that the windscreen wipers
are not folded away from the windscreen.
Otherwise, you could damage the wind-
screen wipers or the bonnet. Operation
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Engine compartment
172
The handle for opening the bonnet is located
above the radiator grille. 2
Bonnet catch handle
X Pull handle 2of the bonnet catch out-
wards from the radiator grille and lift the
bonnet from underneath by the radiator
grille. 3
Recess
4 Support strut
5 Bracket
X Pull support strut 4out of bracket 5.
X Swing support strut 4upwards and insert
it into yellow recess 3.
Closing G
Risk of injury
Make sure that nobody can become trap-
ped as you close the bonnet.
X Raise the bonnet slightly and remove sup-
port strut 4from yellow recess 3.
X Swing support strut 4down and press it
into bracket 5until it engages. X
Lower the bonnet and let it fall from a
height of approximately 20 cm.
X Check that the bonnet has engaged prop-
erly. Engine oil
Depending on driving style, the vehicle con-
sumes a maximum of 0.8 l oil per 1,000 km.
The oil consumption may be higher than this
when the vehicle is new or if you frequently
drive at high engine speeds. You can only
estimate the oil consumption after you have
driven a considerable distance.
For further information on engine oil see
(Y page 295).
Checking the engine oil level To do so:
R
the vehicle should be parked on level
ground
R the engine should be switched off for at
least five minutes if the engine was at nor-
mal operating temperature.
R the engine should be switched off for at
least 30 minutes if the engine was not at Operation
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