
X
Insert oil dipstick 0005back into the guide
tube as far as it will go and remove it again.
If the level is between minimum mark 0026
and maximum mark 0006, the oil level is
correct.
X If the oil level has droppe dto or below
minimum mark 0026, open cap0025and add
engine oil (Y page 244).
The difference in quantity between
marks 0006and 0026is approximately
2 US quarts (2 l).
X Close the hood.
OM651 4-cylinder diesel engine:
At outside temperatures between 32 ‡
(–0 †) and 86 ‡(30 †) you can measure the
oil level whe ncold.
Measuring the engine oil when the engine is
cold is less precise than measuring when the
engine is at normal operating temperature.
When the appropriate warning is shown in the
display
X Adding engine oil (Y page 244)
Or
X Have engine oil siphoned off.
Adding engine oil G
WARNING
If engine oil comes into contact with hot
components in the engine compartment, it
may ignite. There is a risk of fire and injury.
Make sure that engine oil is not spilled next
to the filler neck. Let the engine cool down
and thoroughly clean the engine oil off the
components before starting the engine.
! The alternator is located below the engine
oil filler neck.Ife ngine oil spills onto the
alternator, there is a dange rofalternator
damage. Be very careful when adding
engine oil. H
Environmental note
When adding oil, take care not to spill any. If
oil enters the soil or waterways, it is harmful
to the environment.
! Do not add too much oil. adding too much
engine oil can result in damage to the
engine or to the catalytic converter. Have
excess engine oil siphoned off.
! Do not use any additives in the engine oil.
This could damage the engine.
X Open the hood (Y page 240).
X Unscrew and remove cap 0025.
X Add engine oil.
X Place cap 0005on the filler nec kand tighten.
Whe ndoing so, make sure that the cap
engages correctly.
X Check the oil level with the oil dipstick
(Y page 243) or on the display
(Y page 242).
X Close the hood. Coolant
G
WARNING
The engine cooling system is pressurized,
particularly when the engine is warm. When
opening the cap, you could be scalded by hot
coolant spraying out. There is a risk of injury.
Let the engine cool down before opening the
cap. Wear eye and hand protection when
opening the cap. Open the cap slowly half a
turn to allow pressure to escape.
Only check the coolant level and/or fill the
coolant if the vehicle is on a level surface and
the engine has cooled down. The coolant
temperature must be below 122 ‡ (50 †).
! Check the engine cooling and heating
system regularly for leaks.
If a large quantity of coolant is lost, have
the cause traced and rectified at a qualified
specialist workshop. 244
Engine compartmentMaintenance and care

G
WARNING
Coolant contains glycol and is therefore toxic.
Do not swallow the coolant. See a doctor
immediately if you swallow coolant.
Make sure that coolant does not come into
contact with skin, eyesorc lothing. In case of
contac twith eyes, rinse immediately with
plenty of clean water .Clean affected areas of
skin and clothing with soap and water
immediately. Change any affected clothing
immediately. G
WARNING
If antifreeze comes into contact with hot
components in the engine compartment, it
may ignite. There is a risk of fire and injury.
Let the engine cool down before you add
antifreeze. Make sure that antifreeze is not
spilled nex tto the filler neck.T horoughly
clean the antifreeze from components before
starting the engine.
! Take care not to spill any coolant on
painted surfaces. You could otherwise
damage the paintwork. Example: cap and coolant expansion tank
Checking the coolant level
X
Stop your vehicle as far away from traffic
as possible on level ground.
X Switch off the engine.
X Secure the vehicle to prevent it from rolling
away.
X Open the hood (Y page 240). X
Slowly turn cap 0005half a turn counter-
clockwise to allow excess pressure to
escape.
X Turn cap 0005further and remove it.
X Check the coolant level.
If the coolant reaches the maximum mark
on coolant expansion tank 0006, there is
enough coolant in coolant expansion
tank 0006.
Adding coolant
X If the coolant drops under the minimum
mark on coolant expansion tank 0006, add
coolant to the maximum mark.
Observe the information on coolant
mixture ratio and water quality in the
"Technical data" section (Y page 324). To
prevent damage to the engine cooling
system, use only approved corrosion
inhibitor/antifreeze that comply with the
Mercedes-Benz Specifications for Service
Products.
X Replace cap 0005and turn it clockwise to
tighten.
X Start the engine.
X After approximately 5minutes, switch off
the engine and allow it to cool down.
X Check the coolan tlevel again and add
coolant if necessary.
X Close the hood. Brake fluid
G
WARNING
Brake fluid is hazardous to health. Do not
swallow brake fluid. See adoctor immediately
if you swallow brake fluid.
Make sure that brake fluid does not come into
contact with skin, clothing or eyes. Rinse
affected areas with plenty of clean water and
consult a doctor if necessary.
Always wear gloves and eye protection when
topping up brake fluid. Engine compartment
245Maintenance and care
Z

is bar. 100 kilopascals (kPa) are the
equivalen tof1bar.
Load index
In addition to the load bearing index, a load
index can be stamped onto the sidewall of the
tire. It specifies the load-bearing capacity of
the tire more precisely.
Curb weight
The weigh tofavehicle with standard
equipment including the maximu mfilling
capacity of fuel, oil, and coolant. It also
includes the air-conditionin gsystem and
optional equipmen tifthese are installed on
the vehicle, but does not include passengers
or luggage.
Maximum tire load
The maximum tire load in kilograms or
pounds is the maximum weight for which a
tire is approved.
Maximum permissible tire pressure
Maximum permissible tire pressure for one
tire.
Maximum load on one tire
Maximum load on one tire. This is calculated
by dividing the maximum axle load of one axle
by two.
PSI (Pounds per square inch)
Standard unit of measurement for tire
pressure.
Aspect ratio
Relationship between tire height and width in
percent.
Tire pressure
Pressure inside the tire applying an outward
force to every square inch of the tire's
surface. Tire pressure is specified in pounds
per square inch (psi), in kilopascal (kPa) or in
bar. Tire pressure should only be corrected
when the tires are cold. Cold tire pressure
The tires are cold:
R if the vehicle has been parked for at least
three hours without direct sunlight on the
tires, and
R if the vehicle has not been driven further
than 1 mile (1.6 km)
Tire tread
The part of the tire that comes into contact
with the road.
Tire bead
The tire bead ensures that the tire sits
securely on the wheel. There are several steel
wires in the bead to prevent the tire from
coming loose from the wheel rim.
Sidewall
The part of the tire between the tread and the
tire bead.
Weight of optional extras
The combined weight of those optional extras
that weigh more than the replaced standard
parts and more than 2.3 kg (5 lbs). These
optional extras, such as high-performance
brakes, level control, a roof rack or a high-
performance battery, are not included in the
curb weight and the weight of the
accessories.
TIN (Tire Identification Number)
Au nique identificatio nnumbe rwhich can be
used by a tire manufacturer to identify tires,
for example for a product recall, and thus
identify the purchasers. The TIN is composed
of the manufacturer identification code, tire
size, tire model code and manufacturing date.
Load bearing index
The load bearing index (also load index) is a
code that contains the maximum load bearing
capacity of a tire. 294
What you should know about wheels and tiresWheels and tires

Service products include the following:
R Fuels, e.g. diesel
R Additives for the exhaus tgas
aftertreatment, e.g .Diesel Exhaust Fluid
(DEF)
R Lubricants, e.g. engine oil, transmission oil
R Coolant
R Brake fluid
R Washer fluid
R Climate control system refrigerants
Approved service products comply with the
highes tquality standards and are listed in the
MB Specifications for Service Products. Only
use service products approved for the
vehicle. This is an important condition for the
warranty.
You will recognize the approved service
products by the inscription on the container:
MB Approval (e.g. MB Approval 228.5)
Other identifications and recommendations
refer to quality level or a specification
according to an MB Sheet Number (e.g. MB
228.5). They are therefore not necessarily
approved.
Further information can be obtained at any
qualified specialist workshop.
Additives for approved service products are
neither required no rpermitted. Approved fuel
additives are the exception .Additives can
cause engine damage and must therefore not
be added to the service products.
The use of additives is always the
responsibility of the vehicle operator .The use
of additives may result in the restriction or
loss of your Limited Warranty entitlements. Fuel
Important safety notes G
WARNING
Fuel is highly flammable. Improper handing of
fuel creates a risk of fire and explosion. Avoid fire, open flames, smoking and creating
sparks under all circumstances. Switch off the
engine and, if applicable, the auxiliary heating
before refueling.
G
WARNING
Fuel is poisonous and hazardous to health.
There is a risk of injury.
You must make sure that fuel does not come
into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following:
R Wash away fuel from skin immediately
using soap and water.
R If fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance
without delay.
R If fuel is swallowed, seek medical
assistance without delay.Don ot induce
vomiting.
R Immediately change out of clothing which
has come into contact with fuel.
Tank contents Total capacity
Approximately
26.4 US gal (100 l) of which reserve
fuel
Approximately
5.3 US gal(20 l) Diesel
Fuel grade
G
WARNING
If you mix diesel fuel with gasoline, the flash
point is lower than that of pure diesel fuel.
When the engine is running, exhaust system
components could overheat without being
noticed. There is a risk of fire.
Never refuel with gasoline. Never mix gasoline
with diesel fuel. Service products and capacities
317Technical data Z