Page 254 of 338

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
Page 331 of 338

Service product:
brake fluid
Product name/
number Intac B026E
R Boiling point: 500 ‡
(260 †)
R Wet boiling point:
356 ‡ (180 †) MB Sheet No. 331.0
Maintenance
interval 2 years
i
Have the brake fluid renewed every 2
years at a qualified specialist workshop.
There is usually a notice in the engine com-
partment to remind you when the next
brake fluid change is due. Coolant
Important safety notes 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.
When handling, storing and disposing of cool-
ant and antifreeze, please observe the rele-
vant regulations and the safety notes in the
"Service products and capacities" section
(Y page 320). Coolant additive with corrosion/anti-
freeze protection !
Use only approved antifreeze/corrosion
inhibitor that complies with MB Specifica-
tion for Service Products, Sheet Number
325. Using other, non-approved anti-
freeze/corrosion inhibitors may cause
damage to the coolant system and reduce
the engine's service life.
Coolant is a mixture of water and antifreeze/
corrosion inhibitor. It performs the following
tasks:
R corrosion protection
R antifreeze protection
R raises the boiling point
When the vehicle is first delivered, it is filled
with a coolant mixture that ensures adequate
antifreeze and corrosion protection. Coolant
must be used in the system all year round to
ensure anti-corrosion protection and a raised
boiling point – even in countries with high
outside temperatures.
To prevent damage to the engine cooling sys-
tem, use only approved corrosion inhibitor/
antifreeze that comply with the Mercedes-
Benz Specifications for Service Products. You
will find information about approved corro-
sion inhibitor/antifreeze for your vehicle in
the Maintenance Booklet.
We recommend corrosion inhibitor/anti-
freeze that meets the requirements in MB
Specifications for Service Products Sheet
Number 325.
Check the antifreeze/corrosion inhibitor con-
centration in the coolant every six months.
The percentage of corrosion inhibitor/anti-
freeze additive in the engine cooling system
should:
R be at least 50%. This way, the engine cool-
ing system is protected against freezing
down to approximately -35 ‡ (-37 †).
R not exceed 55% (antifreeze protection
down to -49 ‡ [-45 †]). Otherwise, heat
will not be dissipated as effectively. Service products and capacities
329Technical data Z
Page 332 of 338

If there has been coolant loss, do not refill
only with water. If the vehicle has lost coolant,
add equal parts water and corrosion inhibi-
tor/antifreeze additive. The water used as
part of the coolant mixture must fulfill certain
requirements; these are usually fulfilled by
drinking water. If the water quality is not suf-
ficient, you must treat the water.
Further information can be obtained at any
qualified specialist workshop.
Service product: coolant Product name/number
EURO Peak Coolant/Antifreeze,
OLD WORLD INDUSTRIES
MB Sheet No. 325.0
Zerex G05, The Valvoline Company
MB Sheet No. 325.0
Zerex G48, The Valvoline Company
MB Sheet No. 325.0
Glysantin G05, BASF AG
MB Sheet No. 325.0
Capacities
Engine cooling system
Coolant
Approximately
10.75 US qt (10.0 l) Refrigerant
The air-conditioning system uses the refrig-
erant R-134a. This refrigerant does not dam-
age the ozone layer. Product name/number Maintenance
interval Refrigerant R-134a
MB Sheet No. 361.0 — Further information can be obtained at any
qualified specialist workshop.
Washer fluid
Important safety notes G
WARNING
Windshield washer concentrate is highly flam-
mable. If it comes into contact with hot engine
components or the exhaust system it could
ignite. There is a risk of fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
! Only use washer fluid that is suitable for
plastic lamp lenses, e.g. MB SummerFit or
MB WinterFit. Unsuitable washer fluid
could damage the plastic lenses of the
headlamps.
Observe also the safety notes in the "Service
products and capacities" section.
Mixing ratio Add windshield washer concentrate to the
washer fluid all year round. Adapt the mixing
ratio to the ambient temperature.
At temperatures above freezing:
X Fill up the washer fluid reservoir with a mix-
ture of water and windshield washer con-
centrate, e.g. Summerwash to prevent
smearing.
At temperatures below freezing:
X Fill up the washer fluid reservoir with a mix-
ture of water and windshield washer con-
centrate, e.g. Winterwash if there is a dan-
ger of frost.
This prevents washer fluid from freezing on
the windshield. 330
Service products and capacitiesTechnical data