Driving and parking, Refueling – Mercedes-Benz 2013 M Class User Manual
Page 180
is not permitted if the vehicle is not parked
on a level surface. There is a danger of
overfilling, which could result in damage to
components of the BlueTEC exhaust gas
aftertreatment.
!
Rinse surfaces that have come into
contact with DEF immediately with water or
remove DEF using a damp cloth and cold
water. If the DEF has already crystallized,
use a sponge and cold water to clean it. DEF
residues crystallize after time and
contaminate the affected surfaces.
!
DEF is not a fuel additive and must not be
added to the fuel tank. If DEF is added to
the fuel tank, this can lead to engine
damage.
For further information on DEF, see
(
Opening the DEF filler cap
The fuel filler flap is unlocked or locked
automatically when you open or close the
vehicle with the SmartKey or with KEYLESS-
GO.
X
Switch the ignition off.
X
Press the fuel filler flap in the direction of
arrow :.
The fuel filler flap swings up.
X
Turn blue DEF filler cap ; counter-
clockwise and remove it.
DEF filler cap ; is secured with a plastic
strip.
DEF refill bottle
!
Only screw on the DEF refill bottle hand-
tight. It could otherwise be damaged.
X
Unscrew the protective cap from DEF refill
bottle :.
X
Place DEF refill bottle : on the filler neck
as shown and screw it on clockwise until
hand-tight.
X
Press DEF refill bottle : towards the filler
neck.
The DEF tank is filled. This may take up to
one minute.
i
When DEF refill bottle : is no longer
pressed, filling stops and the bottle may be
taken off again after being only partially
emptied.
X
Release DEF refill bottle :.
X
Turn DEF refill bottle : counter-clockwise
and remove it.
X
Screw the protective cap onto DEF refill
bottle : again.
DEF refill bottles can be obtained at many gas
stations or at an authorized Mercedes-Benz
Center. Refill bottles without a threaded cap
do not provide overfill protection. DEF may
leak if overfilled. Mercedes Benz offers
special refill bottles with a threaded seal.
These are available at any authorized
Mercedes-Benz Center.
178
Refueling
Driving and parking