Fuel additives
!
Do not add gasoline or kerosene to diesel
fuel to improve its flow characteristics. Gas-
oline 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
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
2
emissions 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
2
emis-
sions by driving carefully and having it serv-
iced regularly.
Fuel consumption depends on:
R
the vehicle version
R
the style of driving
R
the operating conditions
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the type or quality of the fuel used
The vehicle will use more fuel than usual in the
following situations:
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at very low outside temperatures
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in city traffic
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during short journeys
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on mountainous terrain
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when towing a trailer
To keep fuel consumption low, observe the
advice in the "Protection of the environment"
section (
Y page 24).
The following components of the different vehi-
cle versions influence fuel consumption:
R
tire sizes, tire tread, tire pressure, tire condi-
tion
R
body
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transmission ratios for the drive assemblies
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additional equipment (e.g. air-conditioning
system, auxiliary heatin
g 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/EEC.
Data concerning fuel consumption are recorded
in the on-board computer; use the steering
wheel buttons to call up the Trip computer
menu (
Y page 174).
Diesel Exhaust Fluid (DEF)
General notes
H
Environmental 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:
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skin
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mucous membranes
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eyes
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 capacities
279
Technical data
Z
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