Owners Manual

X
Only fill the fuel tank until the pump nozzle
switches off.
X
Replace tank filler cap ; and turn
clockwise.
You will hear a click when the fuel filler cap
is closed fully.
Diesel Exhaust Fluid (DEF)
Important safety notes
The exhaust gas aftertreatment requires a
reducing agent, Diesel Exhaust Fluid (DEF), in
order to function correctly.
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.
G
WARNING
Avoid contact with DEF.
DEF is hazardous to health. Do not allow DEF
to come into contact with your skin. Rinse
affected areas with plenty of clean water and
consult a doctor if necessary.
%Environmental note
Dispose of DEF in an environmentally
responsible 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
damaged.
Observe the MB Specifications for Service
Products, Sheet 352.0.
Damage that results from the use of
additives 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.
i
If the DEF reserve has fallen 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 118).
i
If you switch off the engine at a low
outside temperature and add DEF, restart
the engine after refueling. If you leave the
engine switched off without restarting and
the DEF freezes in the tank, then the on-
board computer cannot register the altered
level until after a thawing-out time of up to
60 minutes. During this time, you may not
be able to start the engine.
You will find further information on DEF in the
"Service products" section (Y page 158).
DEF filler neck in the engine
compartment
X
Remove the key from the ignition lock.
X
Close all vehicle doors so that no ammonia
vapors can enter the vehicle.
i
Do not inhale any ammonia vapors which
may escape when you unscrew the tank
filler cap. Ammonia vapors have a pungent
odor. However, they are neither toxic nor
hazardous to health in this concentration.
Refueling
143
Operation
Z