Fuel additives
!Do not add gasoline or kerosene todiesel
fuel to improve its flow characteristics. Gas-
olin e or kerosene impairs the lubricating
properties of the diesel fuel. This can result in
damage to the fuel injection system, for
example.
Information on fuel consumption
HEnvironmental note
CO
2(carbon dioxide) is the gaswhich scien-
tists believe to be prin cipally responsible for
global warming (the greenhouse effect). Your veh icle'sCO
2emissions are directly related to
fuel consumption and therefore depend on:
Reff icie nt use of the fuel bythe engine
Rdriv ing style
Rother non-technical factors, such as envi-
ronmental influences, road conditions or
traff icflow
You can min imize your veh icle'sCO
2emis-
sions by driv ing carefully and having itserv-
iced regularly.
Fuel consumption depends on:
Rthe vehicleversion
Rthe style of driving
Rthe operating conditions
Rthe type or quality of the fuel used
The veh icle will use more fuel than usual inthe
fol lowin g situations:
Rat very low outside temperatures
Rincity traff ic
Rduring short journeys
Ron mountainous terrain
Rwhen to winga trailer
To keep fuel consumption low,observe the
advice inthe "Protection of the environment"
section (
Ypage 24).
The fol lowing components of the different veh i-
cle versions influence fuel consumption:
Rtire sizes, tire tread, tire pressure, tire cond i-
tion
Rbody
Rtransmission ratios for the drive assemblies
Radditional equipment (e.g. air-conditioning
system, auxil iary heating system)
For these reasons, the actual consumption fig-
ures for your vehicle may deviate from the con-
sumption figures determined according to EU
Directive 80 /1268/EE C.
Data concerning fuel consumption are recorded
in the on-board computer; use the steering
wheel buttons to call up the Trip computer
menu (
Ypage 174).
Diesel Exhaust Fluid (DEF)
General notes
HEnvironmental note
Dispose of DEF in an environmentally respon-
sible manner.
When opening the DEF tank filler cap at high
outside temperatures, ammonia vapors may
escape.
Ammonia vapors have a pungent smell and pri-
marily cause irritation of the:
Rskin
Rmucous membranes
Reyes
You may experience a burning sensation in your
eyes, nose and throat, as well as coughing 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.
If DEF heats up, e.g. in direct sunlight, in the DEF
supply reservoir for some time to over 122 ‡
(50 †), ammonia vapor will develop.
To conform to emission regulations, you must
operate the vehicle with DEF and refill the supply
regularly. The engine management recognizes
attempts to operate the vehicle without DEF,
with thinned DEF or with another reducing
agent. After previous warning messages, the
engine management then prevents a further
engine start.
When the number of remaining engine starts is 0
the engine management prevents the vehicle
from being driven at a speed exceeding 5 mph
Service products and capacities279
Technical data
Z
(8 km/h). The multifunction display shows the
Idle Modemessage.
DEF consumption
DEF consumption depends on operational and
driving conditions and it is not necessary to wait
until the next scheduled service to replenish the
fluid. Fluid should be added regularly to the DEF supply reservoir during vehicle operation or, at
the latest, after receiving the first warning mes-
sage via the on-board computer.
Low ambient temperatures
DEF freezes at a temperature of approximately
12 ‡(Ò11 †). The vehicle is equipped with a DEF
preheating system at the factory. Winter oper-
ation is therefore also guaranteed at tempera-
tures under 12 ‡ (Ò11 †).
iIf you add DEF at temperatures below 12 ‡
(Ò11 †) it is possible that the level is not
shown correctly due to the frozen DEF.
Drive for at least 20 minutes (heating phase in
the tank activated) and then stop the vehicle
for at least 30 seconds. The level is then
shown correctly.
Additives
!Do not mix DEF with any additives and do
not dilute DEF with tap water. Otherwise, the
exhaust gas aftertreatment may be damaged.
Observe the MB Specifications for Service
Products, Sheet No. 352.0.
Damage that arises through the use of addi-
tives or tap water will invalidate the New Vehi-
cle Limited Warranty.
Storage
!Containers made of aluminum, copper, cop-
per 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 metals to dissolve and
cause irreparable damage to the exhaust gas
aftertreatment.
Damage caused by such impurities in the DEF
will invalidate the New Vehicle Limited War-
ranty.
Only store DEF in containers made of hi
gh-alloy
Cr‑Ni steel or Mo‑Cr‑Ni steel in accordance with
DIN EN 10 088 ‑1/2/3 or plastic containers
made of polypropylene or polyethylene.
Purity
!Impurities in DEF (e.g. caused by other ser-
vice products, cleaning agents, dust, etc.)
result in increased emissions, malfunctions,
catalytic converter damage or engine dam-
age.
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 regulations
when disposing of DEF.
% Environmental note
Dispose of DEF in an environmentally responsi-
ble manner.
DEF supply reservoir content
Tank contents
Diesel Exhaust Fluid (DEF)11
Approximately 4.7 US gal (18.0 l)
Engine oil
General notes
!The bottles of the various engine oil types
are marked with ACEA (Association des Con-
structeurs Européens d'Automobiles) and/or
API (American Petroleum Institute) classifica-
tions. Only use approved engine oils that con-
form to the following MB Specifications for
Service Products and the prescribed ACEA
and/or API classifications. Using engine oils
11DEF according to ISO 22241. Observe MB Specifications for Service Products, Sheet 352.0.
280Service products and capacities
Technical data
