USB MERCEDES-BENZ M-Class 2012 W166 Owner's Manual

G
WARNING An
intermittent warningsound sand the
dista ncewarning lamp · inthe instrument
cluster isillumina tedifthe DISTRONIC PLUS
system calculates thatthedista ncetothe
vehicl eahe adand yourvehicle's current
speed indicat ethat theDISTRONIC PLUSwill
not becapable ofslowing thevehicle
sufficien tlytomaint ainthe preset following
distanc e,which createsadanger ofa
collision.
Immediately brakethevehicle toincr ease
your distanc eto the precedin gvehicle. The
warning soundisinten dedasafinal caution
in which youshould intercede withyour own
braking inputstoavoid apoten tially
dangerous situation.Donot wait forthe
operation ofthe warning signaltointerc ede
with your ownbraking. Thiswillresult in
potent iallydangerous emergencybraking
which willnotalway sresult inan impact being
avoided.
Tailgating increasestherisk ofan accident . G
WARNING DIS
TRONIC PLUSbrakes yourvehicle witha
maximum deceleration of13 ft/s2
(4 m/s 2
).
This isequivalent toapproximately 40%of
your vehicle's maximum possible
deceleration.
You need tobrake yourself toprevent a
collision. DISTRONIC PLUSbrakes thevehicle
to restore thesetdistance fromthevehicle
ahead orthe setspeed. G
WARNING If
you donot receive visualoracoustic
warning signalsduringacritic altraffic
situation, DISTRONIC PLUShaseither not
recogn izedthecollision risk,hasbeen
deactivated orismalfunct ioning.
Remember, whetherornot DISTRONIC PLUS
is operating, itis ultimately alwaysthe drivers
responsibility toapply thebrakes inorder to
cont rolthe vehicle andavoid acollision. G
WARNING The
vehicle canbebraked whenDISTRONIC
PLUS isactivated. Forthis reason, deactivate
DIS TRONIC PLUSifthe vehicle isto be set in
motion byother means (e.g.inacar wash or
by towing).
If you want DISTRONIC PLUStoassist you,
the radar sensor system mustbeactivated
(Y page 236)andoperational.
General notes DIS
TRONIC PLUSregulates thespeed and
automatically helpsyoumaintain the
distance tothe vehicle detectedinfront .It
brakes automatically inorder toavoid
exceeding thesetspeed.
On long andsteep downhill gradients,
especially ifthe vehicle isladen ortowing a
trailer, youmust select shiftrange 1,2or 3
in good time. Bydoing so,you willmake use
of the braking effectofthe engine, which
relieves theload onthe brake system and
prevent sthe brakes fromoverheating and
wearing tooquickly.
If aslower-moving vehicleisdetect edinfront ,
DIS TRONIC PLUScauses yourvehicle to
brake andmaintain thepreset distance tothe
vehicle infront .
If there isno vehicle drivinginfront ofyou,
DIS TRONIC PLUSfunctionslikecruise
cont rolataspeed rangebetween 20mph
(Canada :30 km/ h)and 120 mph
(Canada :200 km/h).If avehicle isdriving in
front ofyou, itfunct ionsataspeed range
between 0mph (0km/ h)and 120 mph
(Canada :200 km/h).
Do not use DISTRONIC PLUSwhiledriving on
roads withsteep gradients.
As DIS TRONIC PLUStransmitsradar waves,
it can resemble theradar detect orsofthe
responsible authorities.Youcanrefer tothe
applicabl esection inthe Operator's Manualif
there areany questions concerning this. i
USA
only: Driving
systems
171Driving and parking Z

speed
anddoes notaccelerate. Thisisbased
on the current mapdata inthe navigation
system. Example:
trafficcircle
The current speedismaintained:
R approximately 10seconds beforethe
traffic circle/T intersect ionand for
approximately 1.5seconds whendriving on
the traffic circle
R approximately 12seconds beforereaching
a freeway exitand approximately
4s econ dsafter thefreeway exit
Aft erwards, thevehicle accelerat esback to
the setspeed youspecified.
Stopp ing G
WARN
ING Never
getout ofthe vehicle whenDISTRONIC
PLUS isactivat ed.
DIS TRONIC PLUSmustalsonever be
operated, activatedordeactivat edbya
passenger orfrom outside thevehicle.
DIS TRONIC PLUSdoesnotreplace the
electr icparkin gbrake andmust notbeused
for parkin g.
The DISTRONIC PLUSbrakin geffec tis
canc eled andthevehicle canstart movin gif:
R DIS TRONIC PLUSisdeactivat edusing the
cruise control lever.
R you accelerat e.
R there isamalfunct ioninthe system oran
inte rruption inthe power supply, e.g.
batter yfailure. R
the electr icalsystem inthe engin e
compart ment,the batter yor the fuses are
tampered with.
R the batter yis discon nected.
If you wish toleave thevehicle orpark it,
deactivat eDIS TRONIC PLUSandsecure the
vehicle against rollingaway.
If DIS TRONIC PLUSdetectsthat thevehicle
in fron tisstopping, itbrakes yourvehicle until
it is stationary.
Once yourvehicle isstationary, itremains
stationary andyoudonot need todepress the
brake. i
Aft
eratime, theelectric parking brake
secures thevehicle andrelieves theservice
brake. i
Depending
onthe specified minimum
distance, yourvehicle willcome toa
standstill atasufficient distancebehindthe
vehicle infront .The specified minimum
distance isset using thecont rolonthe
cruise controllever.
The electric parking brakeautomatically
secures thevehicle ifDIS TRONIC PLUSis
activated and:
R the driver's doorisopen andthedriver's
seat beltisunfastened.
R the engine isswitched off.
R asystem malfunction occurs.
R the power supply isnot sufficient.
On steep uphillordownhill inclinesorifthere
is amalfunction, thetransmission mayalso
automatically beshifted intoposition P.
Setting aspee d G
WARNI
NG Kee
pin mind thatitm aytak eabrie fmoment
until thevehicle hasmade thenecessary
adjustmen ts.
Inc rease ordecrease thesetvehicle speedto
a value thattheprevailing roadcondit ionsand
legal speed limitspermit. Otherwise, sudden Driving
systems
175Driving and parking
Z

and
unex pectedacc eler ationordeceleration
of the vehicle couldcause anacciden tand/
or ser ious inju ryto youa nd othe rs. X
Pre ssthe cruise contro lle ver up: for a
hi ghe rspeed ordown ;for alower speed.
X Keep thecruise controllever pressed until
the desired speedisreached.
X Release thecruise controllever.
The new speed isstor ed.DISTRONIC PLUS
is activ ated andadjusts thevehicle's speed
to the new speed stored.
X Mak ingadjustm entsin1mp h
increment s(1 km/h increment s):briefly
press thecruise controllever tothe
pressure point.
The laststoredspeed increases or
decreases in1m phincr ement s(in Canada:
1 km/ hincr ement s).
X Mak ingadjustm entsin5mp h
increment s(10 km/h increment s):
briefly pressthecruise controllever
beyond thepressure point.
The laststoredspeed increases or
decreases in5mph increment s(10 km/ h
incr ement s).
Sett ingthe specified minimumdist ance G
WARN
ING It
is up tothe driver toexerc isediscret ionto
select theappropriate settinggiven road
con dition s,traf fic, driver' sprefer reddrivin g
style andapplicable lawsanddrivin g
recom mendat ionsforsafe following distance. You
cansetthe specified minimum distance
for DIS TRONIC PLUSbyvarying thetime span
between oneandtwosecon ds.With this
func tion,you can setthe minimum distance
that DISTRONIC PLUSkeeps tothe vehicle in
fron t,dependen tonv ehicle speed. Youcan
see this distanc ein the multifunc tiondisplay
(Y page 173). X
To increase: turncontrol ;indirect ion
=.
DIS TRONIC PLUSthenmaint ainsagreater
distanc ebetween yourvehicle andthe
vehicle infron t.
X To decrease: turncontrol ;in
direct ion:.
DIS TRONIC PLUSthenmaint ainsashort er
distanc ebetween yourvehicle andthe
vehicle infron t. i
Make
surethatyoumaint ainasufficien tly
safe distanc efrom thevehicle infron t.
Adj ust the distanc eto the vehicle infron tif
nece ssary.
De activ atin gDI STRO NICPLUS G
WA
RNING The
DISTR ONICPLU Ssw itch esoff and
rel eases thebrakes when the vehicle
de cel era tes below the mini mums peed of
20 mph (30km/ h)by operation ofthe system
unless theDISTRONIC PLUSdetectsavehicle
direct lyahead ofyou. Atthat time thedriver
must apply thebrakes inorder toreduce
vehicle speedfurtheror bring itto astop. 176
Driving
systemsDriving and parking