fuel reserve MERCEDES-BENZ M-Class 2012 W166 Owner's Manual

Notes
onoillevel /consumption ....313
Visco sity........................................ 388
ESP ®
(E lec tronic Stability
Program) 4ETS ................................................ 63
Deactiva ting/activa ting................... 64
Displ aymessa ge............................ 239
Function/notes ................................63
Importa ntsafe tyinforma tion........... 63
Trai lerstabi lization ........................... 64
Warni nglamp ....... .......................... 273
Exhaus tchec k................................... 158
Exte riorlighting
see Ligh ts
Exte riormirrors
Adjusting ....................................... 103
Dippi ng(automa tic)....................... 104
Fold ingin/ou t(auto maticall y)....... 104
Fold ingin/ou t(electr ically) ........... 103
Fold inginwhe nlockin g(on-board
computer) ...................................... 237
Out ofposi tion (trou bleshoo ting) ...104
Setting ........................................... 103
Storing settings (memory
function) ........................................ 105
Storing theparking position .......... 104
Eye glas sescompartm ent................. 285 F
Fi
lle rc ap
see Fuel filler flap
Fi rst-aid kit....... .............. .................... 328
Fl at tire
Cha nging awhe el/mo unting the
spa rewhe el................................... 333
MOExtended run-flatsyst em ......... 338
Prep aring the vehi cle..................... 329
Ra ising the vehi cle......................... 334
TIR EFIT kit....... ...............................330
Fl oo rmat .............................................3 08
Fo ldin gthe rear benchseat
forw ards/bac k.................................. 287
Fo rding
Off-road ......................................... 161
On floo ded road s........................... 161
Fron twindsh ield
see Winds hield Fuel
Addit ives........................................ 387
Displayin gthe curr ent
con sumpt ion.................................. 227
Displ aying the range ...................... 227
Driving tips.................................... 158
Flexi blefuel vehicles ...................... 385
Fuel gauge....................................... 29
Importa ntsafe tynotes .................. 385
Premi um-gra deunle adedgas oline .3 85
Prob lem(malfunction) ................... 152
Ref ueling ....... ..................... ............ 149
Specifi cations ................................ 386
Tank content/reserve fuel............. 384
Fue lfill er flap
Openi ng/closi ng............................ 150
Fue lfilte r(dis play mess age)............ 257
Fue llev el
Ca lling up the range (on-boa rd
compu ter)...................................... 227
Fue ltank
Ca paci ty........................................ 384
Prob lem(malfunction) ................... 152
Fuse s
Allo cation chart............................. 346
Before changing............................. 346
Dashb oardfusebox....................... 346
Fuse boxinthe engine
compa rtment ................................. 346
Fuse boxunde rrear bench seat....347
Importa ntsafe tynotes .................. 345 G
Garage
dooropener
Cl eari ngthe memory ..................... 308
Notes ............................................. 305
Openi ng/closi ngthe gara gedoor ..308
Progra mming (button inthe rear -
view mirror) ................................... 306
Gasol ine............................................. 150
Gear orsel ector lever(clean ing
guide lines) ......................................... 324
Genui neMerce des-Be nzparts ......... 380
Glo vebox ........................................... 285
GTW (Gros sTrailer Weight)
(defi nition) ......................................... 37210
In
dex

Warning
andindic atorlamps Func
tion Page
:
Low-be
amheadlamps 109
;
ESP
® 273
=
High-be
amheadlamps 111
?
Electric
parkingbrake (red) 271
F
(USAonly) !
(Canada only) A
Electric
parkingbrake
(y ell ow) 271
B
Distance
warning signal 279
C
Turn
signa l 111
D
Tire
press uremonitor 280
E
SRS
275 Func
tion Page
F
Seat
belt 269
G
Diesel
engine: preglow 140
H
Coo
lant 277
I
Rea
rfog lamp 110
J
Check
engine 276
K
Reserve
fuel 276
L
ESP
®
OFF 273
M
ABS 272
N
Brakes 271
$
(USAonly) J
(Canada only) 30
Instrum
entclusterAt a glance

:
Toopen thefuel filler flap
; Toinsert thefuel filler cap
= Fuel type
? Tire pressure table
Opening X
Switc hoff the engine.
X Remove theSmart Keyfrom theignition
lock.
KEYLE SS-GO: open thedriver’s door.This
switches theignition toposition 0,which
correspon dstohaving removed the
Smart Key.Thedriver’s doorcanbeclosed
again.
X Press thefuel filler flapinthe direction of
arrow :.
The fuel filler flapswings up.
X Turn thefuel filler capcount er-clockwise
and remove it.
X Insert thefuel filler capinto theholder
bracket onthe inside offiller flap;.
X Completely insertthepump nozzleinto the
filler neck andrefuel.
X Only fillthe tank untilthepump nozzle
switches off.
! Overfilling thefuel tank could damage the
fuel system. Closing X
Replace thefuel filler capand turn it
clock wise. Thefuel filler capaudibl y
engages.
X Close thefuel filler flap. i
If
you drive withthefuel filler capopen,
reserve fuelwarning lamp8 flashes. In
addition, the; Check Engine warning
lamp maylight up.Am essage appears in
the multifunc tiondisplay (Ypage 257).
For furth erinfor mation onwarning and
indicat orlamps inthe instrument cluster,
see (Ypage 276). Refueling
151Driving and parking Z

G
WARNING In
the event amalfu nction ofthe SRS isindica tedasoutli nedabove,the SRS may notbe
opera tional.
For yoursafet y,we stron gly recomm endthat you contactana uth oriz edMer cedes-Ben zCent er
immediately tohave thesystem checked.Other wisetheSRS may notbeactivat edwhen needed
in an acciden t,which couldresult inserious orfatal injury, oritmight deploy unexpec tedlyand
unnec essarily whichcouldalsoresult ininjury. Engine
Problem Possible
causes/consequences andM Solutions
;
The
yellow Check
En gine warning lamp
lights upwhile the
engine isrunn ing. There
maybeamalfunct ion,forexample:
R in the engine managemen t
R in the fuel injec tionsystem
R in the exhaust system
R in the ignition system(forvehicles withagasoline engine)
R in the fuel system
The emission limitvalues maybeexceeded andtheengine may
be runn inginemergen cymode.
X Have thevehicle checkedassoon aspossible ataqualified
specialist workshop. i
In
some states,you arerequired bylaw toimmediately visita
qualified specialist workshop assoon asthe yellow Check
En gine warning lamplights up.Ifin doubt, checkwhether such
legal regulations applyinthe state/prov inceinwhich youare
current lydriving. Vehicles
withadiesel engine: thefuel tank hasbeen rundry
(Y page 152).
X Start theengine threetofour times afterrefueling.
If the yellow Check Enginewarning lampgoesout,emergency
running modeiscanceled. Thevehicle neednotbecheck ed. 8
The
yellow reserve fuel
warning lampflashes
while thevehicle isin
motion. Inaddition, the
yell ow Check Engine
warning lamp;
may light up. The
fuel system pressure istoo low. Thefuel filler capisnot closed
correct lyor the fuel system isleaking.
X Observe theadditional displaymessages inthe multifunction
displa y.
X Check thatthefuel filler capiscorrect lyclosed.
X Ifthe fuel filler capisnot correctly closed:close thefuel filler
cap.
X Ifthe fuel filler capisclose d:visit aqual ified specialist
workshop. 276
War
ning andindicator lampsin the instrum entclusterOn-board computer and displays

Problem Possible
causes/co nsequences andM Solutions
8
The
yello wreserve fuel
warning lamplights up
while theengine is
running. The
fuel level hasdropped intothereserve range.
X Refuel atthe nearest gasstation. ?
The
redcoolant
warning lamplights up
while theengine is
running andthecoolant
temperature gaugeis
at the start ofthe scale. The
temperature sensorforthe coolant temperature gaugeis
defective.
The coolant temperature isno longer beingmonitor ed.There isa
risk ofengine damage ifthe coolant temperature istoo high.
X Pull over andstop thevehicle safelyandswitch offthe engine,
payi ngatten tiontoroad andtraffic condition s.Do not cont inue
driving underanycircumst ances.
X Apply theelectric parking brake.
X Consult aqual ified specialist workshop. War
ning andindicator lampsin the instrum entcluster
277On-board computer and displays Z

Fuel
Imp ortant safety notes G
WAR
NING Gasoli
neand dies elfuel sare high lyflam mabl e
and poisonous. They burnviolen tly and can
caus eser ious injury.
Nev erallow sparks,flam esorsmo king
mat erialsne ar gaso lineor dies elfuel !
Turn offtheen gin ebef ore refuelin g.
When everyou are around gasoline ordiesel
fuel, avoid inhaling fumesandanyskin or
clothin gcont act.Extinguish allsmokin g
materials.
Direct skincontactwith fuels andthe
inhalation offuel vapors aredamaging your
health.
Premium -gradeunleaded gasoline !
Toensure thelongevity andfull
performanc eof the engine, onlypremium-
grade unleaded gasolinemaybeused.
If there isno premium-grade unleaded
gasoline availableand regular-grade
unleaded gasolinemaybeused; please
observe thefollowing precautions:
R only fillthe fuel tank tohalf fullwith
regular-grade unleadedgasolineandfill
the rest with premium-grade unleaded
gasoline assoon aspossible.
R do not drive atthe maximum speed.
R avoid sudden acceleration.
R ifthe vehicle iscarrying alight load, e.g.
two passengers withoutluggage, donot
allow theengine torev above
3,000 rpm.
R ifthe vehicle isfully loaded orisbeing
operated inmountainous terrain,donot
depress theaccelerator pedalfurther
than Ôofthe pedal travel. Flexibl
efuel vehicles Import
antsafety notes
Flexible fuelvehicles canberecogn izedby
the stick eron the inside ofthe filler flap.
Flexible fuelvehicles canbeoperated with
premium-grade unleadedgasolineand
ethanol (E85)oramixt ureofboth. Ethanol
fuel (E85) isam ixture ofapprox imately85%
eth anol and15% unleaded gasoline. G
WARN
ING Et
hanol fuel(E85)and itsvapor sare highly
flamm able,poison ousand highly
com bustib le.Ethanol fuelcauses serious
inj ury ifit ignit es,ifit com esintocon tactwith
your skinorifyou inhale thevapors .Avoid
inhal ingethanol vaporsand ethanol coming
into contact withyourskin. Before refueling,
extingui shallnaked flames.Never allow
sparks orsmoking materialsnear ethanol .
Chang ingthe fuel type
For best performa nceand driva bility, itis
recommended thatyouuseeither oneorthe
other fuel.Avoid alterna tingregu larly
betwe enthe two differe nttypes offuel .
When changing betweenthe fuel types ,
ensure thatthefollowi ngconditions aremet:
R the fuel levelis bel ow halffull.
R thefuel levelis abov eth eres erveleve l.This
is iden tifiabl eby thefuel tankreserve
warning lampnotbeing lit.
R you add more than5gallon s(20 liters )of
fuel.
R you switchoff theen gin eb efore refueling.
R the engin eis start edand runs foratleast
five minut esimmediately afterrefueling.
These precaution sshould preventthe
possibili tyof engine difficulties arisingfrom
changing toadifferent fueltype.
If the engine stilldoesn't runcorrect ly,refuel
with atleast 3USgal(12 l)of prem ium-grad e
unle aded gasoline.This may improve the
running ofthe engine. Service
products andcapacities
385Technical data Z