Diesel pa
rticulate filter Note
s onrege neration &
DANG ER Risk of death caused by
ex haust gases
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Inhaling
th ese exhaust gases is hazardous tohealth
and leads topoisoning. #
Never lea vethe engine or, if present,
th e auxiliary heating running in an
enclosed space wi thout suf ficient venti‐
lation. &
WARNING Risk offire caused byhot
ex haust sy stem parts
Flammable materials such as lea ves, grass or
twigs may ignite. #
Park theve hicle so that no flammable
material can come into con tact wi thhot
ve hicle components. #
In particular, do not park on dry grass‐
land or har vested grain fields. Re
generation wi thout inter ruption take s appr ox.
15 minutes.
If th eve hicle is predominantly used for short dis‐
ta nce driving or extended non-operational times,
th is could lead toa malfunction in the automatic
cleaning function forth e diesel particulate filter.
As a result, permanent blocking of the diesel par‐
ticulate filter may occur. and fuel may also accu‐
mulate in the engine oil and cause engine failure.
If yo u main lydrive short dis tances, you should
drive on a free way or go for a country drive for 20
minutes every500 km (300 miles). This facili‐
ta testh e diesel particulate filter's burn-off proc‐
ess.
* NO
TEDama gedue tohot exhaust gases During
rege neration, extremely hot exhaust
ga ses escape from theta ilpipe. #
During rege neration, maintain a mini‐
mum di stance of 7 ft(2 m) from other
objects, e.g. par kedve hicles. Displaying load
On-board computer:
4 Service 5
Consumption Info
The load of the diesel particulate filter is dis‐
pla yed. Load display at
75% load #
Toexitth e displa y:press the back button on
th e left-hand side of thesteering wheel.
Bear in mind thefo llowing related topic:
R Operating the on-board computer
(/ page 120) Battery main switch
Note
s onthe bat tery main switch *
NO
TEDama getothe electrical sy stem If
yo ure mo vethe battery main switch, it
could lead tothe electrical sy stem becoming
damaged. #
Make sure that the ignition is switched
off and that at least 15minutes ha ve
passed before removing the battery
main switch. Otherwise, electrical sys‐
te m components could be dama ged. Yo
u can use the battery main switch todiscon‐
nect the cur rent toall your vehicle's consumers.
This will pr event uncontrolled battery discha rge
caused byquiescent cur rent consumers.
If yo ur vehicle is equipped with an auxiliary bat‐
te ry inthe engine compartment or in the base of
th e co-driver's seat, you must disconnect bo th
batteries. Only then is the electrical sy stem fully
disconnected from the po wer supp ly. 12 0
Driving and pa rking
#
Neverto uch the danger zone sur round‐
ing moving component parts, e.g. the
ro tation area of thefa n. #
Remo vejewe lry and watches. #
Keep items of clo thing and hair away
from moving parts. &
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain components in the engine compart‐
ment can be very hot, e.g. the engine, the
ra diator and parts of theex haust sy stem. #
Allow the engine tocool down and only
to uch component parts desc ribed in the
fo llowing. If
yo u ha vetocar ryout any workinthe engine
compartment, touch only thefo llowing compo‐
nents:
R Hood
R Engine oil filler opening cap
R Washer fluid reser voir cap
R Coolant expansion reser voir cap #
Open the hood (/ page278). #
Remo vedirt from water drain valve 2 of air
intake box 1. Draining
the fuel filter &
WARNING Danger of fire and explosion
due tofuel
Fu els are highly flammable. #
It is essential toavoid fire , open flames,
smoking and creating spar ks. #
Before filling up, switch off the engine,
and, if applicable, the auxiliary heating. &
WARNING Risk offire and explosion due
to fuel
Fu els are highly flammable. There is a risk of
fi re and explosion due tocontact wi thhot
component parts. #
Allow the engine and theex haust sys‐
te m to cool down. *
NO
TEEngine damage due todela yed
drainage of the fuel filter Ve
hicles with a diesel engine: delayed
drainage of the fuel filter can lead toengine
damage.
If th e003A indicator lamp lights up, drain the
fuel filter immediately. +
ENVIRONMENTAL
NOTEEnvironmental
pollution due todisposal in a non-envi‐
ro nmental ly-friendly manner #
Dispose of thewate r/fuel mixture in an
environmentally-friendly manner. OM642 engine
#
Park theve hicle in a safe location and secure
it against rolling away. #
Switch off the auxiliary heating
(/ page 106). #
Switch off the engine. #
Open the hood (/ page278). Mai
ntenance and care 285
#
Place a suitable collector beneath drain hose
2. #
Switch on the ignition. #
Open drain scr ew1 until thewate r/fuel
mixture emerges from drain hose 2.#
Close drain scr ew1 as soon as around
0.2 qt (0.2 liter) of thewate r/fuel mixture has
been collected.
Af ter 30 seconds, the electrical fuel pump
automatically stops the discharge of the
wate r/fuel mixture. #
After draining, switch off the ignition. #
Dispose of the collected water/fuel mixture
in an environmentally responsible manner,
e.g. at a qualified specialist workshop. #
Check that drain scr ew1 has been closed.
If th e engine is running while drain scr ew1
is open, you will lose fuel thro ugh drain hose
2. #
Close the hood (/ page278). #
003A The indicator lamp does not go out
af te r draining: drainthe fuel filter again. #
003AThe indica tor lamp does not go out
af te r the second draining: consult aquali‐
fi ed specialist workshop.
Mercedes-Benz recommends that you ha vethe
fuel filter drained at a qualified specialist work‐
shop. Cleaning and care
Note
s onwashing theve hicle in an automatic
car wash &
WARNING Risk of accident due to
re duced braking ef fect af terwa shing the
ve hicle
The braking ef fect is reduced af terwa shing
th eve hicle. #
Afterth eve hicle has been washed,
brake carefully while paying attention to
th e traf fic conditions until the braking
ef fect has been ful lyrestored. *
NO
TERisk of damage tothe paintwork
and plastic components If
yo uwa sh your vehicle in Touchless Auto‐
matic Car Wash sy stems that use special
cleaning agents, the cleaning agents used can damage
the paintwork or plastic components
of theve hicle. #
Do not wash theve hicle in Touchless
Au tomatic Car Wash sy stems that use
special cleaning agents. Make sure
that the automatic car wash is suitable
fo rth e size of theve hicle.
Before washing theve hicle in an automatic car
wa sh, fold in the outside mir rors and remo veany
additional antennas. Otherwise, the outside mir‐
ro rs, antennas or theve hicle itself could be dam‐
aged.
Make sure any additional antennas are re-ins tal‐
led and that the outside mir rors are fully folded
out again when you lea vethe automatic car
wa sh.
To avo id damage to yourvehicle, obser vethefo l‐
lowing before using an automatic car wash:
R the side windo wsand the sliding window are
comple tely closed.
R the blo werfo rve ntilation and heating is
switched off.
R the windshield wiper switch is in position 005A.
If th eve hicle is very dirty, wash off excess dirt
before cleaning theve hicle in an automatic car
wa sh.
% Re
moving thewa x from the windshield and
th e wiper rubbers af terwa shing theve hicle,
will help avoid smearing and reduce wiper
noise. Note
s on use of a po werwa sher &
WARNING Risk of accident when using
high-pressu recleaning equipment wi th
ro und-spr aynozzles
The wate r jet from a round-spray nozzle (dirt
grinder) may cause damage totires and sus‐
pension components that is not visible.
Components damaged in this wa y may fail
unexpec tedly. #
Do not use high-p ressure cleaning
equipment with round-spray nozzles to
clean your vehicle. #
Damaged tires or suspension compo‐
nents must be replaced immediatel y. Ne
ver use a po werwa sher in theve hicle interior.
The pressurized water created bythe po wer 286
Maintenance and care
Fu
el Note
s on fuel grades on vehicles with a gaso‐
line engine
Obser vethe no tes on operating fluids
(/ page 340).
* NO
TEDo not use diesel torefuel vehicles
with a gasoline engine. If
yo u acciden tally refuel with the wrong fuel:
R Do not switch on the ignition. Otherwise
fuel can enter the engine.
Even small amounts of the wrong fuel
could result in damage tothe fuel sy stem
and the engine. The repair costs are high. #
Contact a qualified specialist workshop. #
Have the fuel tank and fuel lines drained
comple tely. Only
refuel using lo w-sulfur regular fuel with at
least 87AKI/91 RON.
% E10 fuel contains an additive of up
to10%
et hanol. Your vehicle is suitable for use with
E10 fuel. You can fuel your vehicle with E10
fuel.
* NO
TEDama gecaused bythe wrong fuel Even small amounts of
the wrong fuel could
re sult in damage tothe fuel sy stem, engine
and exhaust sy stem. #
Only refuel with there commended fuel. *
NO
TEDama gecaused bythe wrong fuel Even small amounts of
the wrong fuel could
re sult in damage tothe fuel sy stem, engine
and exhaust sy stem.
Ne verre fuel with thefo llowing:
R Diesel
R Gasoline with more than 10%ethanol by
vo lume, e.g. E15, E20, E85, E100
R Gasoline with more than 3% me thanol by
vo lume, e.g. M15, M30, M85, M100
R Gasoline with additives con taining me tal #
Do not mix su chfuels with the fuel rec‐
ommended foryo ur vehicle. %
To
ensure the long evity and per form ance of
th e engine, only unleaded regular gasoline
may be used. No
tethat the higher quality premium grade
ga soline can be refueled at any time.
If yo u are using drums or canis ters to refuel the
ve hicle, you should filter the fuel before filling.
This will pr event malfunctions in the fuel sy stem
due tocontaminated fuel.
Usually you will find information about the fuel
grade on the fuel pump. If there is no identifica‐
tion on the fuel pump, consult a gasst ation
attendant.
% Fo
r fur ther information, contact a qualified
specialist workshop or visit http://
www.mbusa.com (USA only).
Note s on additives in gasoline
Obser vethe no tes on operating fluids
(/ page 340).
* NO
TEDama gefrom use of unsuitable
additives Even small amounts of
the wrong additive
may lead tomalfunctions. #
Only add cleaning additives recommen‐
ded byMercedes-Benzto the fuel. Mercedes-Benz
recommends using brand-name
fuels wi thadditives.
In some countries, theav ailable fuel may not con‐
ta in suf ficient amounts of additi ves. Deposits
could build up in the fuel injection sy stem as a
re sult.
In this case, in consultation with an authorized
Mercedes-Benz Center, the fuel should be mixed
with the cleaning additive recommended by
Mercedes-Benz.
Yo u must obse rveth e no tes and mixing ratios
indica ted on the container.
Note s on fuel grades on vehicles with diesel
engines
Gene ral no tes
Obser vethe no tes on operating fluids
(/ page 340). &
WARNING Risk offire from fuel mixture
If yo u mix diesel fuel with gasoline, theflash
point of the fuel mixture is lo werth an that of
pure diesel fuel.
While the engine is running, component pa rts
in theex haust sy stem may overheat without
wa rning. Te
ch nical da ta341
#
Neverre fuel using gasoline in diesel
engines. #
Never mix gasoline with diesel fuel. *
NO
TEDama gedue toincor rect fuel Even small amounts of
the wrong fuel could
re sult in damage tothe fuel sy stem, the
engine and emission cont rol sy stem.
Ne verre fuel with:
R Gasoline
R Marine diesel
R Heating oil
R Pure bio-diesel or vege tab le oil
R Paraffin or kerosene #
Do not mix such fuels with diesel fuel
and do not use any special additives.
If yo u ha veaccidentally refueled with the
wrong fuel, obser vethefo llowing: #
Do not switch on the ignition. #
Consult a qualified specialist workshop. *
NO
TEMalfunctions due tocontaminated
fuel Fu
el contamination can lead tomalfunctions
in the fuel sy stem. #
Ifyo u are using drums or canis ters to
re fuel theve hicle, you should filter the
fuel before filling. *
NO
TEDama gedue toincor rect fuel Incor
rect fuel can lead toengine damage. #
Refuel only ULSD or diesel fuel with a
sulfur content of maximum 15ppm. Usually
you will find information about the fuel
grade on the fuel pump. If there is no identifica‐
tion on the fuel pump, consult a gasst ation
attendant.
The fuel grade recommended foryo ur vehicle is
fo und on the instruction label in the fuel filler
fl ap . Note
s on low outside temperatures &
WARNING Risk offire and explosion due
to fuel igniting
If yo u heat fuel sy stem components, e.g. with
a heat gun or open flame, these components
could be damaged.
Fu el may leak out and ignite. Depending on
th e type of damage, fuel might not escape
until the engine is running. #
Never heat fuel sy stem components. #
Consult a qualified specialist workshop
to have the malfunction rectified. Re
fill only with commercially available ULTRA-
LO W SULFUR DIESEL (ULSD, maximum sulfur
content 15ppm), which fulfills the ASTM D9 75
st andard.
The flow properties of diesel fuel may be inade‐
qu ate at low outside temp eratures due toparaf fin
separation.
% Malfunctions
resulting from paraf fin separa‐
tion can only be rectified byheating the
entire fuel sy stem. Park theve hicle in a
heated garage ,fo rex ample.
To prev ent malfunctions, diesel fuel with
impr oved flow ch aracteristics is available in the
winter mon ths. Yo u can obtain fur ther informa‐
tion on this at thega sst ation or from your fuel
supplier.
Yo ur vehicle is equipped with a fuel preheating
sy stem. This additionally impr ovesth eflow char‐
acteristics of the diesel fuel byabout 14.5 °F
(8 °C). ULTR A-LO W SULFUR DIESEL can be used
without risk of malfunction down toan outside
te mp erature of appr oximately 14.5 °F (-10 °C).
* NO
TEDama gedue togasoline or paraf fin Gasoline or paraf
fin in diesel fuel impairs the
lubricity of the fuel. This can result in damage
to the fuel injection sy stem, forex ample. #
Do not add any gasoline or paraf fin to
diesel fuel toimpr oveitsflow character‐
istics. B20 fuels with bio-diesel content
* NO
TEDama gedue toincor rect fuel Continuous use of fuels wi
thbio-diesel con‐
te nt ove r 5% (B20 fuels) can lead tofuel filter 342
Tech nical da ta
clogging. Deposits may also
form onthe fuel
injec tor.This may reduce the engine output.
Unburned fuel can get into the oil pan. This
causes the engine oil le velto rise. This can
cause engine mechanical damage.
Obser vethefo llowing points to avoid damage
and reducing the engine output: #
Fill up with fuels with bio-diesel content
of 5% (ULSD) or less, whene ver possi‐
ble. #
Regular lych eck your engine oil le vel if
yo u use B20 fuels on a regular basis. #
Strictly follow the oil change inter vals
qu oted in the instrument clus ter and
within your Main tenance Bookl et. #
Use only engine oils and filters
appr ovedfo r use in your vehicle. #
Ifyo u do not plan todrive your vehicle
fo r se veralwe eks, comple tely fill the
fuel tank in ad vance wi thULSD fuel. Fo
r more information, consult thega sst ation
st aff. The identification of fuels with bio-diesel
con tent (ULSD or B20) must be clear. If the iden‐
tification is not clear, do not refuel. Do not refuel
with any fuels that ha venot been appr ovedfor
yo ur vehicle.
Ta nk content and fuel reser ve
The total capacity of the fuel tank may vary,
depending on theve hicle equipment.
Ta nk content and fuel reser ve Gasoline engine
Total capacity
M2 74 approx. 22.5 gal
(85 liters) Diesel engine
Total capacity
OM6 51/OM642 appr ox.24 .5 gal
(93 liters) Gasoline engine Of which
reser ve
fuel
Models with appr ox.
22.5 gal (85 l) total
capacity appr
ox. 5 gal
(19 liters) Diesel engine Of which
reser ve
fuel
Models with appr ox.
24 .5 gal (93 l) total
capacity appr
ox. 5 gal
(19 liters) DEF
Note
s on DEF
Obser vethe no tes on operating fluids
(/ page 340).
DEF is a water-soluble fluid forth eex haust gas
af te rtre atment of diesel engines.
* NO
TEDama gecaused byadditives in
DEF or bydiluting DEF The DEF
exhaust gas af tertre atment sy stem
could be destr oyed bythefo llowing:
R Additives in DEF
R Diluting DEF #
Only use DEF in accordance with ISO
222 41 . #
Do not mix additives. #
Do not dilu teDEF. *
NO
TEDama geand malfunctions caused
by impurities in DEF Impurities in DEF
result in thefo llowing:
R Higher emission values
R Damage tothe catalytic con verter
R Engine damage
R Malfunctions in the DEF exhaust gas
af te rtre atment sy stem #
Avoid impurities in DEF. +
ENVIRONMENTAL
NOTESoiling wi th
DEF DEF
residue cr ystallizes af ter some time and
st ain the af fected sur faces. Te
ch nical da ta343
#
Immedia tely rinse su rfaces that come in
con tact wi thDEF when filling with water
or remo veDEF wi tha damp clo thand
cold water.
If DEF has already cr ystallized, clean using a
spon geand cold water. If
yo u open the DEF tank, small amounts of
ammonia vapor may be released. Do not inhale
any ammonia vapor that may be released. Fill the
DEF tank only in well-ventilated areas.
DEF consum ption and filling capacity
DEF consum ption
Like fuel consum ption, DEF consum ption is highly
dependent upon driving style and operating con‐
ditions. DEF consum ption is usually within a
ra nge of 0 and 10% of the fuel consum ption. If
necessar y,DEF mu stbe refilled in acco rdance
with the instructions when there fill message is
displa yed in the instrument clus ter.This may also
be necessary between the scheduled mainte‐
nance.
To tal capacity of DEF tank Ve
hicl eT otal capacity
All model s5 .8gal (22 liters ) Exhau
stgas af tertre atment
The vehicle must be operated with DEF if the
ex haust gas af tertre atment sy stem is tofunction
cor rectl y.
If yo u operate theve hicle without DEF or with
emissions-rele vant malfunctions, the legal MOT
appr oval is in validated. The vehicle could be pro‐
hibited from public road use byan of ficial ordi‐
nance.
It may be improper or punishable in some coun‐
tries tooperate a vehicle that uses no DEF or one
th at does not comply with the specifications of
th ese operating instructions.
Engine management monitors theex haust gas
af te rtre atment components for compliance with
emissions la wsand regulations. If you attem ptto
operate theve hicle without DEF, with diluted DEF
or with a dif fere nt reducing agent, this will be
de tected bythe engine management sy stem.
Other emissions- releva nt malfunctions, e.g.
me tering malfunctions or sensor er rors, are also
de tected and log ged. The engine management sy
stem subsequently
pr eve nts the engine being restar ted af ter issuing
a wa rning message.
Therefore add DEF tank regular lyduring vehicle
operation or, at the latest, af terre ceiving thefirst
wa rning message via the instrument clus ter. Engine oil
Note
s on engine oil
Obser vethe no tes on operating fluids
(/ page 340). *
NO
TEEngine damage caused byan
incor rect oil filter, incor rect oil or addi‐
tives #
Do not use engine oils or oil filters other
th an those which meet the specifica‐
tions necessary forth e prescribed
service inter vals. #
Do not alter the engine oil or oil filter in
order toachie velonger change inter vals
th an presc ribed. #
Do not use additives. #
Have the engine oil changed af terthe
prescribed inter vals. Mercedes-Benz
recommends having the oil
ch anged at a qualified specialist workshop.
Fu rther information on engine oil and oil filter:
R inthe MB Specifications for operating fluidsat
http://be vo.mercedes-benz.com (by entering
th e designation)
R at a qualified specialist workshop 344
Tech nical da ta
Quality and capacity of engine oil
%
The containers of
theva rious engine oils are
mar ked with theAC EA (Association of Euro‐
pean Automotive Manufacturers) and/or API
(America Petroleum Institu te) classifications.
Only use appr oved engine oils that cor re‐
spond tothe MB Specifications for operating
fl uids and the prescribed ACEA and/or API
classi fications named bel ow. Engine oils of
ot her grades are not permissible and can
re sult in the loss of the New Vehicle Limited
Wa rrant y.The use of other engine oils not
appr ovedfo r diesel engines can dama gethe
diesel particulate filter (DPF).
MB- Freigabe orMB-App roval Gasoline engine MB-F
reigabe orMB-
Appr oval
M2 74 229.5Diesel engine
sMB-Freigabe orMB-
Appr oval
OM642/OM65 1228.51,229.3 1,
229.5 1,229.52* *
Re commended for lo west possible fuel con‐
sum ption (lo westSA E viscosity class in ea ch
case; obser vepossible restrictions of the
appr ovedSA E viscosity classes).
To achie vethe lo west possible fuel consum ption,
it is recommended touse the engine oil specifica‐
tions mar ked in theta ble forth e lo west SAE vis‐
cosity class. Obser veany possible restrictions of
th e appr ovedSA E viscosity classes.
If th e engine oils lis ted in theta ble are not availa‐
ble, you may add a maximum 1.1 US qt (1.0 liter)
of thefo llowing engine oils once only:
R Vehicles with a gasoline engine: MB-Frei‐
ga be or MB-Appr oval 229.3 or ACEA A3/B4
R Vehicles with a diesel engine: MB-Freigabe
or MB-Appr oval 228.5, 229.3 or 229.5
Multig rade engine oils of the prescribed SAE clas‐
si fication (viscosity) may be used all year round,
ta king the outside temp erature into account. Vi
scosity of the engine oil
* NO
TEEngine damage due toincor rect
SA E classi fication (viscosity) of the
engine oil If
th eSA E classi fication (viscosity) of the
engine oil added is not suitable for prolonged
low outside temp eratures, it may cause
engine damage.
The temp erature readings of theSA E classi fi‐
cation are al ways based on fresh oil. Engine
oil ages when driving as a result of soot and
fuel residue. The characteristics of engine oil
de teriorate significantly at low outside tem‐
peratures. #
Use an engine oil of the appropriate SAE
classi fication at low outside temp era‐
tures. #
Use oil for all-year-round operation. The
temp erature readings of theSA E classi fica‐
tion are al ways based on fresh oil. The temp era‐
ture characteristics of the engine oil, especially at
low outside temp eratures, can de teriorate signifi‐
cantly due toaging when driving.
Therefore, Mercedes-Benz recommends that you
ch ange the engine oil before thest art of the cold
season. Only use an appr oved engine oil in the
prescribed SAE classi fication forth is purpose. The viscosity indicates
theflow characteristics of
a fluid. With rega rd toengine oil, a high viscosity
is synonymous with thick liquid and a low viscos‐
ity with thin liquid. Depending on the outside
te mp eratures, select the engine oil according to
th eSA E classi fication (viscosity). The table sho ws
th eSA E classi fications tobe used. The low tem‐
perature characteristics of engine oils can de teri‐
orate significantly during operation due toaging
and soot and fuel acc retion, forex ample. A regu‐
lar oil change with an appr oved engine oil in the
appropriate SAE classi fication is therefore
stro ngly recommended. Te
ch nical da ta345