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DEF refill bottles
1
can be obtained at many gas
stations or at a qualified specialist workshop.
Refill bottles without a threaded cap offer no
overfill protection. DEF may leak out as a result
of overfilling. Mercedes-Benz offers special refill
bottles with a threaded cap. These are available
at any authorized Mercedes-Benz Center.
Unscrew the protective cap from DEF refill
#
bottle 1.
Place DEF refill bottle
1
#
opening
2
and screw it on clockwise until
hand-tight.
Press DEF refill bottle
1
#
ing 2.
The DEF tank is filled. This could take up to
one minute.
%
When the DEF refill bottle is no longer
pressed down, filling stops. The bottle can be
removed when it has been only partially emp‐
tied.
#
#
#
Filling procedure with the pump nozzle of a
DEF filling pump
#
Closing the DEF filler cap on filler caps that
are not lockable
#
#
#
as shown on filler
towards filler open‐
Driving and parking 131
Release DEF refill bottle 1.
Turn DEF refill bottle
1
counter-clockwise
and remove it.
Screw the protective cap onto DEF refill bot‐
tle
1
again.
Insert the pump nozzle into the filler neck and
add DEF. When doing so, do not overfill the
DEF tank.
After filling the DEF tank, place DEF filler cap
1
on the filler neck and tighten it clockwise.
Turn the DEF filler cap until the lettering is
legible and horizontal.
The filler neck is only locked correctly when
this is the case.
Close the hood.
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