AdBlue
®
residue crystallises afte racertain
amount of time and soils the affecte dsur-
faces.
Hig houtside temperatures If AdBlue
®
is heate dtoabove 50 †for an
extended perio doftime,AdBlue ®
may start
to decom pose,e .g.d ue to direc tsunlight on
the AdBlue ®
tank. Ammonia vapour sdevelop
as aresult. G
WARNING
Ammonia vapours may escape if the
AdBlue ®
tan kcap is opened at high tempera-
tures. Ammonia vapours have apungent
odour and are particularly irritating to the
skin, to mucous membranes and to the eyes.
You may experienc eaburning sensation in
your eyes, nose and throat ,aswell as cough-
ing and waterin goftheeyes.
Do no tinhale ammoni avapours.
Lo wo utside temperatures AdBlue
®
freezes at atemperatur eofapp rox-
imatel y–11 †. Th evehicle is equip pedw ith
an AdBlue ®
preheating system at the factory.
Winter operatio ncan thus be guaranteed
even at temperatures below –11 †.
Additives !
Only use AdBlue ®
in accordan cewit hISO
22241. Do not us eadditives wit hAdBlue ®
an ddon ot dilute AdBlue ®
with water. This
may destroy th eBlueTEC exhaust gas after-
treatmen tsystem.
Purity Assuring the purity of AdBlue
®
is particularly
important with respect to avoiding malfunc-
tions in the exhaus tgas aftertreatment sys-
tem.
If AdBlue ®
is pumped out of the AdBlue ®
tank,
e.g. during repair work, do not use this fluid to refill the tank
.The purity of the fluid can no
longer be guaranteed.
! Impuritie sinAdBlue ®
(e.g. due to other
service products, cleaning agents or dust)
lead to:
R increased emission values
R damage to the catalytic converter
R engine damage
R ®
exhaust
Tota lcapacity of the AdBlue ®
tank Model Total
capacity 27.5 l
Engine oil
Th
eq uality of engine oils is decisive for the
function and service life of an engine. After
extensive tests, Mercedes-Benz approves
engine oils that correspond to the current
technical standard.
Therefore, only Mercedes-Benz approved
engine oils may be used in Mercedes-Benz
engines.
Further information on tested and approved
engine oils can be obtained from any
Mercedes-Benz Service Centre. Mercedes-
Benz recommends that you have the oil
change carried out at aMercedes-Benz
Ser vice Centre. Mercedes-Ben zapproval is
indicated on the oil container by the inscrip-
tion "MB Approval" and the cor respondi ng
designation, e.g. MB Approval 22 9.51.
Th et able shows which engine oils have been
approved for your vehicle. Petrol engines MB Approval
M3
50 4MATIC 22
9.3, 229.5 Servic
eproducts and capacities
375Technicaldata Z
malfunctions in the BlueTEC
gas aftertreatment system
ML 250 BlueTEC 4MATIC
Please bear the following in mind ML
350 BlueTEC 4MATIC
