
The fuel filler flap is beside the front left-hand
door when viewed in the direction of travel. It
is only possible to open the fuel filler flap
when the front door is open.
X Remove the key from the ignition lock.
X Switch off the auxiliary heating system
(Y page 122).
X Open the front left-hand door first, and then
the fuel filler flap.
X Close all vehicle doors to prevent fuel
vapors from entering the vehicle.
X Turn fuel filler cap 0044counter-clockwise,
remove it and let it hang from strap 0043.
X Completely insert the filler neck of the fuel
pump nozzle into the tank and refuel.
X Only fill the tank until the pump nozzle
switches off. Fuel may otherwise leak out.
X Replace tank filler cap 0044and turn clock-
wise.
You will hear a click when the fuel filler cap
is closed fully.
X Open the front left-hand door first, and then
close the filler flap. Problems with the fuel and fuel tank
If your vehicle is losing fuel, the fuel lines or
the fuel tank are defective.
X Turn the key to position 0in the ignition
lock immediately and remove it.
X Do not restart the engine under any cir-
cumstances.
X Consult a qualified specialist workshop. Diesel Exhaust Fluid (DEF)
Important safety notes H
Environmental note
Dispose of DEF in an environmentally respon-
sible manner.
! Only use DEF in accordance with
ISO 22241. Never mix DEF with additives or thin it with tap water. The exhaust gas
aftertreatment may otherwise be dam-
aged.
Observe the MB Specifications for Service
Products, Sheet 352.0.
Damage that results from the use of addi-
tives or tap water leads to the loss of the
New Vehicle Limited Warranty.
! If DEF comes into contact with a painted
or aluminum surface, wash the surface off
immediately with plenty of water.
! DEF is not a diesel additive and must not
be mixed with fuel in the tank. Even small
amounts of DEF can cause engine damage.
Damage that results from the blending of
DEF will not be covered by the New Vehicle
Limited Warranty.
The exhaust gas aftertreatment requires a
reducing agent, Diesel Exhaust Fluid (DEF), in
order to function correctly.
When opening the DEF tank filler cap at high
outside temperatures, ammonia vapors may
escape.
Ammonia vapors have a pungent smell and
primarily cause irritation of the:
R skin
R mucous membranes
R eyes
You may experience a burning sensation in
your eyes, nose and throat, as well as cough-
ing and watering of the eyes.
Do not inhale ammonia vapors. Avoid contact
with DEF.
Do not allow DEF to come into direct contact
with your skin; it is hazardous to your health.
Rinse any affected areas off with plenty of
clean water. Consult a doctor if necessary.
i If the DEF level has dropped below the
reserve range, add at least 2.0 US gal
(7.6 l) of DEF at the latest after receiving
the second warning message
(Y page 184). Refueling
149Driving and parking Z 

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 

R
diesel fuel with a bio-diesel content of
more than 7%
R diesel fuel with a bio-diesel content of up
to 7%, which does not fulfill the require-
ments stated under "Fuel grade"
The sulfur content of the diesel fuel may not
exceed the following values: Euro 6 diesel engine 50 ppm
Euro 5 diesel engine ≥ 50 ppm
Euro 4 diesel engine ≥ 500 ppm
Euro 3 diesel engine ≥ 2500 ppm
You will generally find information about the
fuel grade on the filling pump. If there is no
identification on the filling pump, consult a
gas station attendant.
For more information about refueling
(Y
page 148).
i You can obtain information about modifi-
cation options for operation with alterna-
tive fuels (bio-diesel fuels) from any author-
ized Mercedes-Benz Center.
Diesel at very low outside temperatures G
WARNING
If you heat fuel system components, e.g. with
a hot-air gun or open flame, these compo-
nents could be damaged. This can cause fuel
to escape and ignite. Depending on the type
of damage, fuel may also not escape until the
engine is running. There is a risk of fire and
explosion.
Never heat fuel system components. Contact
a qualified specialist workshop to rectify the
malfunction.
Refill only with commercially available
ULTRA-LOW SULFUR DIESEL (ULSD, maxi-
mum sulfur content 15 ppm), which fulfills the
ASTM D975 standard.
The flow properties of diesel may be inade-
quate at low outside temperatures due to
paraffin separation. i
Malfunctions resulting from paraffin sep-
aration can only be rectified by heating the
entire fuel system. Park the vehicle in a
heated garage, for example.
To prevent operating problems, diesel with
better flow qualities is available during the
winter months. You can obtain information at
the gas station or from your fuel supplier.
Your vehicle is equipped with a fuel preheat-
ing system. This improves the flow properties
of the diesel by approximately 46 ‡ (8 †).
ULTRA-LOW SULFUR DIESEL can be used
without risk of malfunction down to an out-
side temperature of approximately 14 ‡
(00F810 †).
Fuel additives
! Do not add gasoline or kerosene to diesel
fuel to improve its flow characteristics.
Gasoline or kerosene impairs the lubricat-
ing properties of the diesel fuel. This can
result in damage to the fuel injection sys-
tem, for example.
Information on fuel consumption H
Environmental note
CO 2(carbon dioxide) is the gas which scien-
tists believe to be principally responsible for
global warming (the greenhouse effect). Your
vehicle's CO 2emissions are directly related to
fuel consumption and therefore depend on:
R efficient use of the fuel by the engine
R driving style
R other non-technical factors, such as envi-
ronmental influences, road conditions or
traffic flow
You can minimize your vehicle's CO 2emis-
sions by driving carefully and having it serv-
iced regularly.
i Only for certain countries: the respective
current consumption and emission values
of your vehicle can be found in the COC
papers (EC CERTIFICATE OF CONFORM- Service products and capacities
323Technical data Z 

Storage
!
Containers made of aluminum, copper,
copper alloys as well as unalloyed or
galvanized steel are not suitable for storing
DEF. If stored in these types of containers,
DEF could cause constituents of these met-
als to dissolve and cause irreparable dam-
age to the exhaust gas aftertreatment.
Damage caused by such impurities in the
DEF will invalidate the New Vehicle Limited
Warranty.
Only store DEF in containers made of high-
alloy Cr-Ni steel or Mo-Cr-Ni steel in accord-
ance with DIN EN 10 088-1/2/3 or plastic
containers made of polypropylene or poly-
ethylene.
Purity
! Impurities in DEF (e.g. caused by other
service products, cleaning agents, dust,
etc.) result in increased emissions, mal-
functions, catalytic converter damage or
engine damage.
The purity of DEF is essential to prevent mal-
functions in the exhaust gas aftertreatment.
If DEF is pumped out of the DEF tank, e.g.
during repair work, the same liquid must not
be used to refill the tank. Its purity is no longer
guaranteed.
Disposal
Observe country-specific laws and regula-
tions when disposing of DEF.
003D Environmental note
Dispose of DEF in an environmentally respon-
sible manner. DEF supply reservoir content
Depending on equipment, the DEF supply res-
ervoir content may vary. Tank contents
Diesel Exhaust Fluid (DEF)
12 Approximately 3.2 US gal (12.0 l
13 Approximately 4.7 US gal (18.0 l
14 Approximately 4.9 US gal (18.5 l)
13 Approximately 5.8 US gal (22.0 l)
15 DEF consumption
For vehicles with a 4-cylinder, in-line
engine (OM 651), the DEF consumption of
the vehicle is:
R
as Cargo Van/Passenger Van, approx.
2322 MPG (0.2 l/100 km)
R as Cab Chassis, approximately 1720 MPG
(0.35 l/100 km)
For vehicles with a 6-cylinder, in-line
engine (OM 642), the DEF consumption of
the vehicle is:
R as Cargo Van/Passenger Van, approx.
2322 MPG (0.10 l/100 km)
R as Cab Chassis, approximately 1720 MPG
(0.14 l/100 km)
In each case, the stated consumption figure
is a mean value between urban and extra-
urban driving cycles. The consumption figure
does not refer to a specific vehicle, but is pro-
vided for the purposes of comparison
between different vehicle types.
DEF consumption, like fuel consumption, is
very dependent on the driving style and the
operating conditions. This means that the real
consumption figures during operation of your
vehicle may deviate from those stated.
12 DEF according to ISO 22241. Observe the MB Specifications for Service Products, Sheet 352.0.
13 Vehicles with an OM 642 engine)
14 Vehicles with an OM 651 engine)
15 Cab Chassis only. Service products and capacities
325Technical data Z