
Problem Possible causes/consequences and
0050
0050Solutions 00B2
The yellow
engine oil level
warning lamp
flashes and the
warning buzzer
sounds after the
engine is started
or while the vehi-
cle is in motion. On vehicles with a diesel engine, the oil level display additionally
appears in the display, e.g.
– 2.0 qts
– 2.0 qts (Canada:– 2.0 ltr – 2.0 ltr).
There is not enough or no oil in the engine.
There is a danger of engine damage.
X Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Check the oil level with the oil dipstick (Y page 253).
X If the engine oil level is correct: have the malfunction rectified
immediately at a qualified specialist workshop.
X If the engine oil level is too low: have the vehicle towed to a
qualified specialist workshop. 00B2
The yellow
engine oil level
warning lamp
lights up and the
warning buzzer
sounds after the
engine is started
or while the vehi-
cle is in motion. The engine oil level is above the maximum level.
There is a risk of damaging the engine or catalytic converter.
X
Check the oil level.
X If the oil level is too high: have the engine oil extracted as soon
as possible at a qualified specialist workshop.
X If the oil level is correct: have the malfunction rectified as soon
as possible at a qualified specialist workshop. 00B2
On vehicles with
a diesel engine,
the yellow
engine oil level
warning lamp
lights up repeat-
edly during the
journey. There is a malfunction in the engine oil level display.
X
Have the vehicle checked immediately at a qualified specialist
workshop. 003F
The yellow cool-
ant level warning
lamp lights up
while the engine
is running. The coolant level is too low.
Never run the engine if the coolant level is too low. The engine
could overheat and be damaged.
X
Stop the vehicle as soon as possible, paying attention to road
and traffic conditions.
X Switch off the engine and let it cool down.
X Add coolant and be sure to observe the warning notes
(Y page 255).
X If you need to add coolant frequently, have the engine cooling
system checked at a qualified specialist workshop. 226
Indicator and warning lamps in the instrument clusterOn-board computer and displays

Always observe the operating instructions of
the respective manufacturer when using suit-
able load securing aids or tie downs. In par-
ticular, the information on service life.
Load securing aids and tie downs may not be
used, for example, if:
R identification marks are missing or illegible
R there are yarn breakages, damage to bear-
ing seams or other signs of tearing
R there are signs of shearing, deformation,
pinching or other damage
R there is damage to clamping or connecting
elements
Such load securing aids and tie downs are
worn; they should not be used and must be
replaced. If you use load securing aids or tie
downs which are worn, the load may not be
sufficiently secured and could cause damage
to property.
After an accident, the following must be
checked at a specialist workshop:
R Cargo compartment floor
R Load surface
R Cargo tie-down rings
R Tie downs
Otherwise, the load may not be correctly
secured the next time anything is stowed.
Even if you follow all loading guidelines, the
load increases the risk of injury in the event
of an accident. Observe the tips in the "Secur-
ing luggage/loads" (Y page 244) and "Load
distribution" (Y page 244) sections. Before loading
! The anti-slip mats cannot be used for
securing goods and must be replaced when
they show signs of:
R Permanent deformation and crushing
R Crack formation
R Cuts X
Tire pressure: check the tire pressure and
correct if necessary ( Ypage 290).
X Cargo compartment floor: clean the
cargo compartment floor.
The cargo compartment floor must be free
from oil and dust, dry and swept clean to
prevent the load from slipping.
X Place non-slip mats (anti-slip mats) on the
cargo compartment floor if necessary. During loading
! On passenger van versions with maxi-
mum seating layout, the permissible rear
axle load would be exceeded if the full pay-
load were to be loaded in the cargo com-
partment.
X Observe the gross axle weight rating and
permissible gross vehicle weight for your
vehicle.
Take into account that your vehicle's curb
weight is increased if accessories or
optional equipment are installed. The max-
imum payload is thus reduced.
X Observe the notes on load distribution
(Y page 244).
The overall center of gravity of the load
should always be as low as possible, cen-
tered and between the axles near the rear
axle.
X Secure the load (Y page 244).
Always observe the relevant country-spe-
cific legal requirements, laws and regula-
tions. Checks after loading
G
WARNING
Combustion engines emit poisonous exhaust
gases, such as carbon monoxide. If the sliding
door or rear door is open when the engine is
running, exhaust gases can enter the vehicle
interior, especially during the journey. There
is a risk of poisoning. Loading guidelines
243Transporting loads
Z

Overview of the engine compartment
Euro-6 engine
0043
Coolant expansion tank cap
(Ypage 255)
0044 DEF filler neck cap 4
(Y page 150)
0087 Engine oil filler neck cap (Y page 252)
0085 Brake fluid expansion tank cap
(Ypage 256)
0083 Washer fluid reservoir cap (Y page 257)
Regularly check the fluid level and the assem-
bly for leaks. If you detect fluid loss, e.g. oil
flecks on the vehicle parking space, consult
a qualified specialist workshop immediately. Engine oil
General notes !
Engine oil gets dirty in the course of oper-
ation and its quality and volume are gradu-
ally diminished. Regularly check the oil
level, and top up or have it replaced as
needed.
Observe the information on engine oils and oil
consumption in the "Technical data" section
(Y page 326).
You can check the oil level in the engine:
R on the display of the on-board computer
R with the oil dipstick Checking the oil level shown in the dis-
play If at extremely low temperatures no engine oil
level is displayed after 5 minutes, repeat the
engine oil level check after another
5 minutes.
If an oil level reading is still not displayed,
check the engine oil level with the dipstick.
Have the oil level display checked at a quali-
fied specialist workshop.
Only check the oil level when the engine is at
normal operating temperature.
X Park the vehicle on a level surface.
X Switch off the engine.
X Wait for five minutes.
X Turn the key to position 2in the ignition
lock.
The display is activated.
X Vehicles without steering wheel but-
tons: press the 0079menu button on the
instrument cluster (Y page 34) repeatedly
until the display shows the 00AFsymbol.
The --:-- --:-- display message appears in the
display while the engine oil level measure-
ment is running.
X Vehicles with steering wheel buttons:
press the 0098service button on the instru-
ment cluster (Y page 34).
The 00B2Engine Engine oil oillevel
level Measuring
Measuring
in progress
in progress display message appears in
the display while the engine oil level meas-
urement is in progress.
Display message for vehicles without
steering-wheel buttons: the display may
show the following messages after the engine
oil level measurement. 00AF
Action
OK OK X
Do not add oil. 4
For Cargo Van/Passenger Van only. 252
Engine compartmentMaintenance and care

– 1.0 qts
– 1.0 qts X
Add the amount of oil
shown (Y page 254).
X Check the engine oil level
again after a few minutes. – 1.5 qts – 1.5 qts
– 2.0 qts
– 2.0 qts
HI
HI The oil level is too high.
X
Have excess oil removed. Measurement units in the display:
R
qts qts USA only
R ltr
ltr Canada only
Display message for vehicles with steer-
ing-wheel buttons: the display may show
the following messages after the engine oil
level measurement. 00AF
Action
Engine
Engine
oil level oil level
OK OK X
Do not add oil. Engine
Engine
oil Add oil Add
1.0quart 1.0quart X
Add the amount of oil
shown (Y page 254).
X Check the engine oil level
again after a few minutes. Engine Engine
oil Add oil Add
1.5quart 1.5quart
Engine
Engine
oil Add oil Add
2.0quart 2.0quart
Engine
Engine
oil level oil level
Reduce Reduce
oil level oil level The oil level is too high.
X
Have excess oil removed. Eng. oil Eng. oil
lev. Turn lev. Turn
ignition ignition
on for on for
level level X
Turn the key to posi-
tion 2in the ignition lock. Observe Observe
wait. wait.
period period X
Repeat the engine oil
measurement after about
5 minutes if the engine is
at normal operating tem-
perature.
X Repeat the engine oil
measurement after about
30 minutes if the engine
is not at normal operating
temperature. Engine Engine
oil level oil level
Not when Not when
eng. run‐ eng. run‐
ning ning X
Switch off the engine and
wait for approximately
5 minutes if the engine is
at normal operating tem-
perature. Then, perform
the engine oil measure-
ment. Measurement units in the display:
R
qts qts USA only
R ltr
ltr Canada only
Checking the oil level using the oil dip-
stick Engine compartment
253Maintenance and care Z

For vehicles with a red oil dipstick, only check
the oil level when the engine is at normal
operating temperature:
X Stop your vehicle as far away from traffic
as possible on level ground.
X Secure the vehicle to prevent it from rolling
away.
X Switch off the engine.
X Wait for five minutes.
For vehicles with a yellow oil dipstick, only
check the oil level when the engine is cold.
X Stop your vehicle as far away from traffic
as possible on level ground.
X Secure the vehicle to prevent it from rolling
away.
X Open the hood (Y page 250).
X Pull out oil dipstick 0043.
X Wipe oil dipstick 0043using a lint-free cloth.
X Insert oil dipstick 0043back into the guide
tube as far as it will go and remove it again.
If the level is between minimum mark 0087
and maximum mark 0044, the oil level is cor-
rect.
X If the oil level has dropped to or below min-
imum mark 0087, open cap 0085and add
engine oil (Y page 254).
The difference in quantity between
marks 0044and 0087is 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 when cold.
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 254)
Or
X Have engine oil siphoned off.
Adding engine oil G
WARNING
If engine oil comes into contact with hot com-
ponents 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. If engine oil spills onto the
alternator, there is a danger of alternator
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 250).
X Unscrew and remove cap 0085.
X Add engine oil. 254
Engine compartmentMaintenance and care

X
Place cap 0043on the filler neck and tighten.
When doing so, make sure that the cap
engages correctly.
X Check the oil level with the oil dipstick
(Y page 253) or on the display
(Y page 252).
X Close the hood. Coolant
G
WARNING
The engine cooling system is pressurized, par-
ticularly 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 tem-
perature must be below 122 ‡ (50 †).
! Check the engine cooling and heating sys-
tem regularly for leaks.
If a large quantity of coolant is lost, have
the cause traced and rectified at a qualified
specialist workshop. 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, eyes or clothing. In case of
contact with eyes, rinse immediately with
plenty of clean water. Clean affected areas of
skin and clothing with soap and water imme-
diately. Change any affected clothing imme-
diately. G
WARNING
If antifreeze comes into contact with hot com-
ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Let the engine cool down before you add anti-
freeze. Make sure that antifreeze is not spilled
next to the filler neck. Thoroughly 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 250).
X Slowly turn cap 0043half a turn counter-
clockwise to allow excess pressure to
escape.
X Turn cap 0043further and remove it.
X Check the coolant level.
If the coolant reaches the maximum mark
on coolant expansion tank 0044, there is
enough coolant in coolant expansion
tank 0044. Engine compartment
255Maintenance and care Z

Adding coolant
X
If the coolant drops under the minimum
mark on coolant expansion tank 0044, add
coolant to the maximum mark.
Observe the information on coolant mix-
ture ratio and water quality in the "Techni-
cal data" section ( Ypage 329). To prevent
damage to the engine cooling system, use
only approved corrosion inhibitor/anti-
freeze that comply with the Mercedes-Benz
Specifications for Service Products.
X Replace cap 0043and turn it clockwise to
tighten.
X Start the engine.
X After approximately 5 minutes, switch off
the engine and allow it to cool down.
X Check the coolant level again and add cool-
ant if necessary.
X Close the hood. Brake fluid
G
WARNING
Service products may be poisonous and haz-
ardous to health. There is a risk of injury.
Comply with instructions on the use, storage
and disposal of service products on the labels
of the respective original containers. Always
store service products sealed in their original
containers. Always keep service products out
of the reach of children.
Brake fluid is hazardous to health. Also
observe the safety notes in the "Service prod-
ucts and capacities" section (Y page 320).G
WARNING
The brake fluid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake fluid. If the boiling point of the brake
fluid is too low, vapor pockets may form in the
brake system when the brakes are applied
hard. This would impair braking efficiency.
There is a risk of an accident. You should have the brake fluid renewed at
the specified intervals.
! Brake fluid corrodes paint, plastic and
rubber. If paint, plastic or rubber has come
into contact with brake fluid, rinse with
water immediately.
Have the brake fluid renewed every 2 years
at a qualified specialist workshop. Observe
the information on brake fluid in the "Techni-
cal data" section ( Ypage 328). Check the brake fluid level regularly, e.g.
weekly or when refueling.
Checking the brake fluid 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 250).
X Check the brake fluid level.
The brake fluid level is correct if the level is
between the MIN mark and MAX mark on
brake fluid reservoir 0043.
X Close the hood.
! If the brake fluid level in the brake fluid
reservoir has fallen to the MIN mark or
below, check the brake system immedi-
ately for leaks. Also check the thickness of
the brake linings. Visit a qualified specialist
workshop immediately.
Do not add brake fluid. This does not cor-
rect the malfunction. 256
Engine compartmentMaintenance and care

X
Turn the key to position 2in the ignition
lock.
X Open drain plug 0044immediately until the
water/fuel mixture flows out of drain
hose 0043.
X Screw in drain plug 0044as soon as approx-
imately 0.2 US qt (0.2 l) of the water/fuel
mixture have been collected.
i The electrical fuel pump halts the flow of
the water/fuel mixture after 30 seconds.
X After draining, turn the key back to posi-
tion 0in the ignition lock.
X Dispose of the collected water/fuel mix-
ture in an environmentally responsible
manner, e.g. at a qualified specialist work-
shop.
X Check drain plug 0044. The drain plug must
be closed.
When the engine is running and drain
hose 0044is open, fuel is lost through drain
hose 0043.
X Close the hood.
If the 00B8 indicator lamp does not go out
after draining:
X Drain the fuel filter again.
X If the 00B8 indicator lamp does not go out
after draining for the second time, have the
cause checked immediately at a qualified
specialist workshop. Vehicle interior
Air filter for the rear-compartment air
conditioning
! Regularly check the air filters for visible
dirt. Clean or replace a dirty filter mat. The
dirt may otherwise lead to damage to the
air-conditioning system. Filter magazine, located on the roof in the rear
compartment
An increased amount of sand or dust may
collect in the air filter of the rear-compart-
ment air conditioning when you drive on dusty
or sandy roads.
X
To remove the filter mat: carefully pry
cover 0043out of recesses 0044and remove.
X Remove the filter mat from the air duct.
X To clean the filter mat: wash the dirty fil-
ter mat with clear water.
X Leave the filter mat to dry.
i The filter mat must not be cleaned or dried
in a machine.
X To install the filter mat: insert the filter
mat in cover 0043.
X Replace and engage cover 0043. Maintenance
General notes
H
Environmental note
Observe measures to protect the environ-
ment when working on the vehicle. You must
observe the legal requirements when dispos-
ing of service products, e.g. engine oil. This
also includes all components, e.g. filters,
which have come into contact with service
products. Any qualified specialist workshop
can provide information about this.
Dispose of empty containers, cleaning cloths
and care products in an environmentally 258
MaintenanceMaintenance and care