Owners Manual

Add this additive to the diesel in time, i.e.
before the flow properties of the diesel are
affected by paraffin separation. Malfunctions
caused by paraffin separation can only be
rectified by heating the entire fuel system,
e.g. by parking the vehicle in a heated garage.
G
WARNING
If you heat up the fuel system with a heat gun,
for example, you may damage parts of the fuel
system. Fuel could escape, be ignited, and
cause a fire.
Never heat the fuel system with a heat gun or
with a naked flame.
Diesel Exhaust Fluid (DEF)
DEF is the reducing agent for the exhaust gas
aftertreatment. DEF is a nonflammable,
nontoxic, colorless, odorless and water-
soluble liquid.
!
Only use DEF in accordance with
ISO 22241. The exhaust gas aftertreatment
system may otherwise be damaged.
Observe the MB Specifications for Service
Products, Sheet No. 352.0.
Damage caused by the use of other
reducing agents will invalidate 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.
High ambient temperatures
If DEF in the DEF reservoir heats up to
temperatures above 122 ‡ (50 †) for a long
period of time (e.g. due to direct sunlight),
ammonia vapors form.
G
WARNING
If you open the DEF reservoir cap at high
temperatures, ammonia vapors could be
released.
Ammonia vapors have a pungent odor and are
particularly irritating for your skin, respiratory
organs and eyes. This may result in burning
eyes, nose and throat, as well as coughing and
watering eyes.
Do not inhale ammonia vapors.
Low ambient temperatures
DEF freezes at a temperature of
approximately 12 ‡ (Ò11 †). The vehicle is
equipped with a DEF preheating system at the
factory. This ensures that the vehicle can be
operated in winter, even at temperatures
below 12 ‡ (Ò11 †).
Additives and tap water
!
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
additives or tap water will invalidate the
New Vehicle Limited Warranty.
Storage
Only store DEF in containers made of high-
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.
!
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
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
Warranty.
158
Service products
Operation