MERCEDES-BENZ METRIS 2021 MY21 Operator's Manual

Manual parking brake
Applying or
releasing thep arking brake &
WARNING Risk of skidding or an acci‐
dent bybraking wit hthe parking brake
If yo uh ave tobrak eyour vehicle wit hthe
parking brake, theb raking dis tance is consid‐
erab lylonger and thew heels ma yloc k. There
is an increased risk of skidding and/or acci‐
dent. #
Only brak ethe vehicle wit hthe parking
brak eift he service brak ehasfailed. #
Inthis case, do no tappl ythe parking
brak ewitht oo muc hforce. #
Ifth ew heels loc k,immediately release
th ep arking brak easmuchasr equired
fo rt he wheels totur na gain. &
WARNING Risk offire and an acciden tif
th ep arking brak eisnotreleased
If th ep arking brak eisnotfull yreleased when
driving, thef ollowing situations can occur:
R The parking brak ecan overheat and cause
af ire
R The parking brak ecan lose its holding
function #
Comple tely release thep arking brake
befor edriving off. The brak
elights do no tlight up when youb rake
th ev ehicle wit hthe parking brake. #
Toappl ythe parking brake: depress parking
brak epedal 2firm ly.
The red0049 (onlyUSA)or0024(only Can‐
ada) indicator lam pinthe instrument clus ter
light supift he engine is running .Ifthevehicle
is in motion, awarning tone sounds. #
Torelease thep arking brake: depressthe
brak epedal and keep it depressed. #
Pull release handle 1.
The parkin gbrake isreleased abruptl y.The
red 0049 (onlyUSA)or0024(onl yCanada)
indicator lam pinthe instrument clus terg oes
out.
Pe rforming emer gency braking with thep ark‐
in gb rake If, in
exceptional cases, thes ervice brak efails,
yo uc an use thep arking brak etoperform emer‐
ge ncy braking. #
Pull release handle 1and slowl ydepress
parkin gbrake pedal 2. Pa
rking thev ehicle forane xtended period Pa
rking thev ehicle forl on gerthan four
we eks #
Connect thes tarter batter ytoatrick le
ch arge rv iaaj ump-s tart connection
(/ page 191).
or #
Disconnect all batteries (/ page194).
Pa rking thev ehicle forl on gerthan si xweeks #
Contact aqualified specialis tworks hop and
seek advice.
The vehicle can otherwise suf ferd ama geas a
re sult of lac kofuse. Driving and driving saf
etys ystems Note
sond riving sy stems and your responsi‐
bility Yo
ur vehicle is equipped wit hdriving sy stems
whic hassis tyou in driving, parking and maneu‐
ve ring thev ehicle. The driving sy stems ar eonly
aids. These cann otreplace your attention tothe
sur rounding sand do no trelease youf romy our
re sponsibility under road traf ficl aw .The driver is
re sponsible fort he dis tance tothev ehicle in
front, forv ehicle speed, braking in good time and
fo rs tayi ng in lane. Alw aysp ayattention tothe Driving and pa
rking 109

traf
fica nd inter vene if necessa ry.Bea wareofthe
limitation sregarding thes afeu se of these sys‐
te ms.
If yo uf ail toadap tyour driving style, thed riving
sy stems can neither reduce ther isk of accident
nor override thel aws of ph ysics. The road and
we ather condition saswell asthet raffic situation
canno talway sbet aken in toaccount. In
fo rm ation on vehicl esensor sand cameras Some driving and driving saf
etys ystems use
camera sand radar or ultrasonic sensor stomoni‐
to rt he area in front of, behind or next tothev ehi‐
cle. 1
Multifunction camera
2 Ultrasonic sensors
3 Rear vie wcamera
% Depending on
thev ehicle's equipment, the
ra dar sensor sareintegrated on thes ide of
th er ear bumper sand/or behin dthe
Mercedes star in ther adiator grill. &
WARNING Risk of accident du eto
re stricted de tection per form anc eofv ehi‐
cle sensor sand cameras
If th ea reaa round vehicle sensor sorcameras
is co vered, damaged or dirty ,certain driving
and saf etys yst ems cann otfunction cor rectly.
The reisar isk of an accident. #
Keep thea reaa round vehicle sensor sor
cameras clear of an yobstructions and
clean. #
Have damag etothe bumper ,radiator
grille or stone chipping in thea reaof th
ef ront and rear wind owsrepaired at a
qu alified specialis tworks hop. Ke
ep thea reas of thec amera sand sensor sfree
of dirt, ice and slush (/ page184). The sensors
and cameras and their de tection area smustn ot
be co vered. Do no tattac hadditional license plate
holders, advertisin gmedia, sticke rs,foils or stone
pr otection foils in thed etection rang eoft he sen‐
sor sand cameras. Ensur ethat no pr otru ding load
ex tends int othe de tection area.
In thee vent of damage, or following aseve re
impact ,have thef unction of thes ensor schec ked
at aq ualified specialis tworks hop. Ha vedamage
or stone chips in thea reaoft he cameras
re paired at aqualified specialis tworks hop. Overvie
wofdriving sy stems and driving
saf etys ystems In
this section, youw illfind information abou tthe
fo llowing driving sy stems and driving saf etys ys‐
te ms:
R ABS ( Anti-lock BrakingSystem)
(/ page111 )
R BAS(Bra ke Assist System) (/ page111 )
R ESP ®
(Ele ctronic Stability Program)
(/ page111 )
R EBD ( Electronic Brakeforce Distribution)
(/ page113 )
R ActiveB rake Assi st (/ pag e113 )
R Cruis econt rol(/pa ge115)
R ActiveD ista nce Assi stDISTRONIC
(/ page 116)
R Hill star ta ssis t(/pag e120)
R HOLD function (/ page121 )
R Parking Assis tPARKTRONIC (/ page 122)
R Rear vie wcamer a(/ pag e123)
R ActiveP arking Assis t(/pag e125)
R ATTENTION ASSIS T(/ pag e127)
R Blind Spo tAssis t(/pag e129)
R Lane Keeping Assis t(/pag e129) 11 0
Driving and pa rking

Fu
nction of ABS (Anti-loc kBraking Sy stem) AB
Sc ontrols theb rake pressur eincritical situa‐
tions:
R The wheels ar epreve nted from lo cking when
braking, e.g. during maximum full-s topb rak‐
ing or when ther eisi nsufficient tir etraction
R The steerability of thev ehicle in term sof
ph ysical possibilities is ensured when braking
If AB Sinter venes, youw illfeel pulsations in the
brak epedal. The pulsating brak epedal ma ybean
indication of hazardous road condition sand func‐
tions as areminder totake extrac arew hile driv‐
ing. Fu
nction of BAS(Brak eAssis tSystem) BA
Ss uppo rtsy ou wit hadditional braking forc ein
an emer gency braking situation.
If yo ud epress theb rake pedal quickl y,BA Sis
acti vated:
R BASa utom atical lyboosts theb raking forc eof
th eb rakes
R BASc an sho rten theb raking dis tance
R ABS pr events thew heels from locking
When your elease theb rake pedal, theb rakes
function as usual again. BASisd eactivated. Fu
nction of ESP ®
(Electronic Stability Pro‐
gr am) ESP
®
can, within ph ysical limits, monitor and
impr oved riving stabilit yand traction in thef ol‐
lowing situations:
R When driving and pullinga wayonw etor slip‐
pe ry road sur faces
R Whe nbraking
If th ev ehicle is deviating from thed irection
desired bythed rive r,ESP ®
can stabiliz ethe vehi‐
cle byper form ing thef ollowing actions:
R One or mor ewheels ar ebraked
R The engin eoutput is adap teda ccording tothe
situation
% Only use wheels wit
hthe recommended tire
sizes. Only then will ESP ®
function properly. If
the 00E5 warning lam pflashes in thei nstru‐
ment clus ter,one or mor ewheels ha vereached
th eir traction limit:
R Adapty our driving styletos uitthep reva iling
ro ad and weather conditions
R Do no tdeactivat eESP®
unde rany circum‐
st ances
R Only depress thea ccelerator pedal as faras
is necessar ywhen pulling away
If the 00E5 warning lam plight supc ontinuousl y,
ESP ®
is no tavailable due toam alfunction.
Obse rvet he information on warning lamps and
displa ymessages (/ page260).
If the 00BB warning lam pinthe instrument clus‐
te risp ermanently lit, ESP ®
is deactivated.
Obser vethef ollowing points when ESP ®
is deac‐
tivated:
R Vehicle stabilizatio nisdelayeda nd is signifi‐
cantly reduced in thel owe rspeed range
R The driv ewheelsm aystar ttos pin
R Traction control is still active
% If ESP ®
is deactivated, ESP ®
will still support
yo uw hen braking. Swit
ching ESP ®
of foronv iatheo n-boa rd
compu ter( ve hicles withou tsteering wheel
but tons) &
WARNING Risk of skidding if ESP ®
is
deactivated
If yo ud eactivat eESP®
,E SP ®
canno tcarry out
ve hicle stabilization. #
ESP ®
should onl ybedeactivated in the
fo llowing situations. It ma
ybeb esttod eactivat eESP®
in thef ollowing
situations:
R When using sno wchains.
R In deep sno w.
R On sand or gr avel.
Spinnin gthe wheels results in acutting action,
whic henhances traction.
Ad justing setting susing theo n-boar dcomputer is
onl yavailable on vehicles without the00BB but‐
to nont he center console. Driving and parking
111

On-boar
dcomputer:
4 È5
Settings 5
ESP #
Toactivate/deactivate: pressthe0074or0075
button and confir mbypressing the0078but‐
to n.
If ESP ®
is deacti vated, the 00BB warning lamp
in thei nstrument clus terl ights up.
% Obser
vethei nformation on warning lamps
and displa ymessages (/ page260). Switching ESP
®
of foronv iatheo n-boa rd
compu ter( ve hicles with steering wheel but‐
to ns) &
WARNING Risk of skidding if ESP ®
is
deactivated
If yo ud eactivat eESP®
,E SP ®
canno tcarry out
ve hicle stabilization. #
ESP ®
shoul donlybed eactivated in the
fo llowing situations. It ma
ybeb esttod eactivat eESP®
in thef ollowing
situations:
R When using sno wchains.
R In deep sno w.
R On sand or gr avel.
Spinnin gthe wheels results in acutting action,
whic henhances traction.
Ad justing setting susing theo n-boar dcomputer is
onl yavailable on vehicles without the00BB but‐
to nont he center console.
On-boar dcomputer:
4 DriveAssist 5
ESP #
Toswitc hon/off: pressthe0076 button.
If ESP ®
is deactivated, the00BB warning lamp
in thei nstrument clus terl ights up.
% Obser
vethei nformation on warning lamps
and displa ymessages (/ page260). Deactivating or activating ESP
®
using theb ut‐
ton &
WARNING Risk of skidding if ESP ®
is
deactivated
If yo ud eactivat eESP®
,E SP ®
canno tcarry out
ve hicle stabilization. #
ESP ®
should onl ybedeactivated in the
fo llowing situations. It ma
ybeb esttod eactivat eESP®
in thef ollowing
situations:
R When using sno wchains.
R In deep sno w.
R On sand or gr avel.
Spinnin gthe wheels results in acutting action,
whic henhances traction. #
Press button 1.
The 00BB warning lam pinthe instrument
clus terg oes on when ESP ®
is deactivated.
% Obser
vethei nformation on warning lamps
and displa ymessages (/ page260). Fu
nction of ESP ®
Crosswind Assist ESP
®
Crosswind Assis tdetects suddenly occur‐
ri ng crosswinds and helps thed rive rtok eepthe
ve hicle in thel ane:
R ESP ®
Crosswind Assis tisactivefroma pprox.
50 mph(80 km/h) when driving stra ight
ahead or on gentle cur ves.
R The vehicle is stabilized byatarge teda nd
one-sided brak einter vention. The instrument
clu ster then displa ysam essag ewitht he traf‐
fi cs ignf or stro ng crosswind. 11 2
Driving and pa rking

ESP
®
Crosswind Assi stdoes no treact under the
fo llowing conditions:
R The vehicle is subjected tosevere jolts and
vib rations, e.g .asar esult of une vens urfaces
or po tholes.
R The vehicle loses traction, e.g. on sno worice
or when hydroplaning. Fu
nction of ESP ®
trailer stabilization &
WARNING Risk of accident in poo rroad
and weather conditions
In poor road and weather conditions, the
traile rstabilizatio ncanno tpreve nt lu rching of
th ev ehicle/trailer combination .Trailer sw ith
ah igh cen terofg ravity ma ytipove rbefore
ESP ®
de tects this. #
Alwaysa dap tyour driving styletos uit
th ec urrent road and weather condi‐
tions. ESP
®
trailer stabilizatio ncan stabiliz eyour vehi‐
cle when driving wit hatrailer if it starts to
swer ve:
R Ifth es ystemd etects thet railer ,ESP ®
trailer
st abilizatio nisactivated from aspeed of
appr oximately 40 mph(65 km/h).
R Slight swerving from side toside is reduced
by atarge teda nd one-sided brak eapplica‐
tion.
R If se vere swerving from side toside occurs,
engine output is also reduced and all the
wheels ar ebrake d. Fu
nction of EBD (electronic brak eforce distri‐
bution) EB
Dh asthef ollowing characteristics:
R monitoring and controllin gthe braking force
on ther ear wheels
R impr oving driving stabilizatio nwhen braking,
especiall yonb ends Fu
nction of Activ eB rake Assi st Ac
tiveB rake Assi stconsi stsoft hefollowing func‐
tions:
R Distance warning function
R Autonomous braking function
R Situation-dependent brak eforce boosting Ac
tiveB rake Assi stcan hel pyou tominimize the
ri sk of acollision wit hvehicles, cyclists or pedes‐
trians, or reduce thee ffects of suc hacollision.
If Ac tiveB rake Assi sthas de tected arisk of colli‐
sion, awarning tone sounds and theL warn‐
ing lam plight supint he instrument clus ter.
If yo udon otreact tothew arning, autonomous
brakin gcan be initiated in critical situations .In
especiall ycritical situations ,Activ eBrake Assi st
can initiat eauton omous braking di rectl y.In this
case, thew arning lam pand warning tone occur
simul taneously wi th thebraking application.
If yo ua ppl ythe brak eyourself in asituation
de tected as critica lbyActiveBrake Assi st,or
appl ythe brak eduring autonomous braking, sit‐
uation-dependent brak eforce boosting occurs.
The brak epressur eincreases up tomaximum
full-s topb raking if necessar y.
If autonomous braking or asituation-dependent
braking boosting ef fect has occu rred, the L
wa rning lam pflashes briefly and then goes out. &
WARNING Risk of an accident caused by
limited de tection per form anc eofA ctive
Brak eAssist
Ac tiveB rake Assi stcanno talway sc lea rly
identify object sand comple xtraf fics itua‐
tions. #
Alwaysp aycareful attention tothet raf‐
fi cs ituation; do no trelyo nA ctiv eBrake
Assi stalone. ActiveB rake Assi stis only
an aid. The driver is responsible for
maintaining asufficiently saf edista nce
to thev ehicle in front, vehicle speed
and forb raking in good time. #
Be prepare dtobrake or swer veif nec‐
essar y. %
If
th es ystemisn otavailable, an appropriate
messag eappear sinthe multifunction dis‐
pla y.
Obser vethes ysteml imitations of ActiveB rake
Assi st.D ue tothen atur eoft he sy stem, complex
but non-critical driving conditions ma yalso cause
Ac tiveB rake Assi stto inter vene du ring braking.
The individua lsubfunctions ar eavailable in
th ef ollowing speed ranges:
Distance warning function Driving and parking
11 3

The dis
tance warning function warnsy ou in the
fo llowing situations:
R From aspeed of appr oximatel y4mph
(7 km/h), if your vehicle is critically close to a
ve hicle or pedestrian. An intermittent warning
to ne sounds and theL warning lam pin
th ei nstrument clus tert hen lights up.
Brak eimmediatel yortakee vasiv ea ction ,provi‐
ded it is saf etodosoa ndthet raffic situation
allo wsthis.
The dis tance warning function can aid youint he
fo llowing situations wit hanintermit tent wa rning
to ne and awarning lamp:
R Vehicles tr aveling in front: uptoappr ox‐
imatel y155 mph(250 km/h)
R Stationar yvehicles: uptoappr oximately
50 mph(80 km/h)
R Cros sing vehicles: noreaction
R Moving pedestrians/cyclists ahead: upto
appr oximately 50 mph(80 km/h)
R Crossing cyclists: uptoappr oximately
37 mph(60 km/h)
R Stationar ypedestrians: noreaction
Au tonomous braking function
The autonomous braking function ma yinter vene
at speed sstartin gf roma pproximately 4mph
(7 km/h) in thef ollowing situations:
R Vehicles tr aveling in front: uptoappr ox‐
imately 125m ph (200 km/h)
R Stationar yvehicles: uptoappr oximately
31 mp h(50 km/h)
R Cros sing vehicles: noreaction
R Cyclists ahead: uptoappr oximately 50 mph
(80 km/h)
R Moving pedestrians/crossing cyclists: up
to appr oximatel y37m ph (60 km/h)
R Stationar ypedestrians: noreaction
Situation-dependent brak eforce boosting
Situation-dependent brak eforce boosting may
inter vene at speed sstartin gf roma pproximately
4m ph (7 km/h) in thef ollowing situations:
R Vehicles tr aveling in front: uptoappr ox‐
imatel y155 mph(250 km/h)
R Stationar yvehicles: uptoappr oximately
50 mph(80 km/h)
R Cros sing vehicles: noreaction R
Cyclists ahead: uptoappr oximatel y50m ph
(80 km/h)
R Moving pedestrians/crossing cyclists: up
to appr oximately 37mph(60 km/h)
R Stationar ypedestrians: noreaction
Canceling abrake application of Activ eB rake
Assi st
Yo uc an cancel abrak eapplicatio nofActive
Brak eAssistat an ytimeb y:
R Fully depressin gthe accelerator pedal or with
kickdown.
R Releasing theb rake pedal.
Ac tiveB rake Assi stma ycancel theb rake applica‐
tion when one of thef ollowing condition sisfulfil‐
led:
R Youm aneuver toavo idtheo bstacle.
R Thereis no longer arisk of collision.
R An obs tacle is no longer de tected in front of
yo ur vehicle.
Sy stem limits
Fu ll sy stem per form anc eisn otavailable foraf ew
seconds af ters witching on thei gnition or af ter
driving off.
The sy stem ma ybeimpaired or ma ynotfunction
in thef ollowing situations:
R In sno w,rain, fogorh eavy spr ay.
R Ifth es ensor saredirty ,fogged up, damaged
or co vered.
R Ifth es ensor sareimpaired due tointer fer‐
ence from other radar sources, e.g. strong
ra dar reflection sinparking garage s.
R Ifal oss of tir epressur eoraf aulty tir ehas
been de tected and displa yed.
R In comple xtraffic situation swhere objects
canno talway sbec learly identified.
R If pedestrians or vehicles mo vequickl yinto
th es ensor de tection range.
R If pede strians ar ehidde nbyo ther objects.
R Ifth et ypical outline of apedestrian cann otbe
distinguished from theb ackg round.
R Ifap edestrian is no tdetected as such, e.g.
due tospecial clo thing or other objects.
R In cur vesw ithan arrow radius.
Fo llowing damag etothe front end of thev ehicle,
ha ve thec onfiguration and operation of ther adar
sensor checkedataq ualified specialis twork‐ 11 4
Driving and pa rking

shop. This also applies
tocollisions at slow
speeds whe rether eisnov isible damag etothe
front end of thev ehicle. Setting
Activ eB rake Assi st On-boar
dcomputer:
4 DriveAssist 5
Active Brake Assist #
Select thed esired setting fort he warning/
re action tim eand press the0076 button.
The setting is retained when thev ehicle is
next star ted.
Deactivating Activ eB rake Assi st
% It is
recommended that ActiveB rake Assi stis
alw aysl efta ctivated. #
Select Offand press the0076 button.
The dis tance warning function and thea uton‐
omous braking function ar edeactivated. Also,
th es tatus appear sintheStatus overvie wof
the DriveAssist menu.
The next time thev ehicle is star ted, Ac tiveB rake
Assi stis automaticall yactivated wit hthe Medium
setting.
When ActiveB rake Assi stis activated, them ulti‐
function displa yshows the 00C7symbol.
At speeds up toappr oximately 20 mph
(30 km/h), them ultifunction displa yinvehicles
wit hA ctiv eParking Assis tfirst sho wsthe 005Dsta‐
tus indicator .Onlyf romas peed of appr oximately
20 mph(30 km/h) does them ultifunction display
sho wthe 005D symbol ins tead of the00C7 status
indicator. Cruise control
Fu
nction of cruise control
Cruise cont rola ccelerates and brakes thev ehicle
automaticall yinorder tomaintain apreviously
st ored speed.
If yo ua ccelerat etoovertake, fore xamp le,the
st ored speed is no tdele ted. If your emo veyour
fo ot from thea ccelerator pedal af tero vertaking,
cruise control will resume speed regulation back
to thes tore ds peed.
Yo uo perat ecruise control usin gthe cruise con‐
trol le ver.Yo uc an stor ea nyspeed abo ve20 mph
(30 km/h).
Obser vethen otes on driving sy stems and your
re sponsibility ,otherwise youc anno trecognize
danger s(/ page 109). Sy
stem limits
Cruise control ma ybeunable tomaintain the
st ored speed on uphill gradients. The stored
speed is resumed if theu phill gradient evens out
and thev ehicle's speed does no tfall below
20 mph(30 km/h).
On long and steep downhill gradients, yous hould
ch ang edowntoa lowe rgear in good time. Take
particular no teofthis when driving aladen vehi‐
cle. By doing so, youw ill mak euse of the
engine' sbraking ef fect. Thi swillt ak es ome of the
st ra in of fthe brak esystem and pr eventthe
brakes from overheating and wearing tooq uickl y.
If yo uc hang ewheel siz eonyourvehicle, checkit
is assigned tothec orrect wheel size catego ry
( / pag e218). If thec ategor yischanged without
re coding thec ont rolu nit sint hevehicle, thef unc‐
tionin gofcruise cont rolm aybe impaired.
Do no tuse cruise control in thef ollowing situa‐
tions:
R in traf fics ituations whe refrequent speed
ch anges ar erequired, e.g. in heavy traf ficor
on winding roads
R off-road or on con stru ction sites
R on slippe ryor slic kroads, as thed rive wheels
can lose traction when accelerating and the
ve hicle can then skid
R ifth er eisp oor visibility
Operating cruise control
Requ irements
R Cruise control is selected.
R The parkin gbrake has been released.
R ESP ®
is activated, but ma ynotinter vene.
R The driving speed is at leas t20m ph
(30 km/h).
R The brak epedal is no tdepressed. Driving and parking
11 5

St
oring and maintainin gthe cur rent speed #
Brief lypress thec ruise cont rolleve rup1or
down 3. #
Remo veyour foot from thea ccelerator pedal.
The cur rent speed is then sa veda nd main‐
ta ined bythev ehicle.
When youa ctivat ecruise control, amessag ewith
th es tore ds peed is brief lyshown in them ulti‐
function display's text field. The multifunction dis‐
pla yalso sho ws the 00B2symbol and thes tored
speed.
Calling up thes toreds peed &
WARNING Risk of accident du etostored
speed
If yo uc all up thes tore ds peed and this is
lo we rthan your cur rent speed ,the vehicle
decelerates. #
Take intoa ccount thet raffic situation
befor ecallin gupt hestored speed. #
Brief lypull thec ruise cont rolleve rind irection
2.
The las tstore ds peed is called up and main‐
ta ined bythev ehicle.
If th el asts tore ds peed has pr eviousl ybeen
dele ted, thec urrently driven speed is stored.
% When
yous wit ch offt he vehicle, thel ast
speed stored is cleared.
Increasing or reducing the speed #
Press thec ruise cont rolleve rup1or down
3 asfarast he 1s tpressur epoint.
The stored speed is increased or reduced by
1m ph (1 km/h).
or #
Press thec ruise cont rolleve rup1or down
3 beyond the1 stpressur epoint.
The stored speed is increased or reduced by
5m ph (1 0km/h).
Switching of fcruise control #
Brief lypress thec ruise cont rolleve rfor wa rds
4 .
The 00B2 symbo land thes tore ds peed in the
multifunction displa ythen go out.
% Cruise contro lisdeactivated in thef ollowing
situations:
R youa ppl ythe brakes.
R youd rive belo was peedof20m ph
(30 km/h).
R yous hiftthe transmission toposition 005C.
R ESP ®
inter venes.
R youd eactivat eESP®
.
R ther eisam alfunction wit hthe ABS or
ESP ®
sy stem.
If cruise cont rola utomaticall ydeactivates, a
wa rning tone sounds and theCRUISE CONTROL
Canceled messageappear sbriefly in them ulti‐
function displa y. Ac
tiv eD ista nce Assis tDISTRONIC Fu
nction of Activ eD ista nce Assis tDISTR ON IC
Ac tiveD ista nce Assi stDISTRONI Cmaintains the
se ts peed on free-flowing roads. If vehicles ahead
ar ed etected, thes etdis tan ce is maintained, if
necessar yuntil thev ehicle comes toah alt.The
ve hicle accelerates or brakes, depending on the
dis tance tothev ehicle in front and thes etspeed.
Speed and dis tance ar esetand stored on the
st eering wheel. The speed can be se tintherange
between 13mp h(20 km/h )and 125m ph
(200 km/h).
Other features of ActiveD istan ce Assi st
DISTRONIC:
R Depending on thep reselected dis tance,
DISTRONIC inter venes ei ther dynamically
(shor tdista nce) or tosave fuel (long dis‐
ta nce).
R Depending on thev ehicle mass de tected, the
dynamics of theD ISTRONIC inter vention are
re duced.
R Accele ratio ntot hestored speed is initiated if
th et urns ignal indicator is switched on to
ch ang etot heove rtakin glane. 11 6
Driving and pa rking

Obser
vethen otes on driving sy stems and your
re sponsibility ,otherwise youc anno trecognize
danger s(/ page 109).
Sy stem limits
The sy stem ma ybeimpaired or ma ynotfunction
in thef ollowing ins tances, fore xamp le:
R in sn ow,rain, fogorh eavy spr ay
R ifth er eisd irtont heradar sensor sorthey
ar ec overed
R ifth er eisi nterfere nce from radar sources or
stro ngradar reflections, fore xamp le in park‐
ing garages
R in traf fics ituations whe refrequent speed
ch anges ar erequired, e.g. in heavy traf ficor
on winding roads or off- road
R onroads wit hsteep downhill or uphill gradi‐
ents
R on winding roads
The sy stem cann otdetect stationar yobjects
unles sthese wereprev iousl ydetected as moving.
In addition, on slipper yorslickr oads, braking or
accelerating can caus eone or se veraloft he drive
wheels tolose traction and thev ehicle can then
skid.
Do no tuse ActiveD ista nce Assi stDISTRONI Cin
th ese situations. &
WARNING Risk of accident from acceler‐
ation or braking byActiveD ista nce Assi st
DISTRONIC
Ac tiveD ista nce Assi stDISTRONI Cmayaccel‐
erat eorb rake inthef ollowing cases, for
ex ample:
R Ifth ev ehicle pulls away usin gActiv eDis‐
ta nce Assi stDISTRONIC.
R Ifth es tore ds peed is called up and is con‐
siderably faster or slo werthan thec ur‐
re ntly driven speed.
R IfAc tiveD ista nce Assi stDISTRONI Cno
longer de tects avehicle in front or does
no treact toreleva nt objects. #
Alwaysc arefully obser vethet raffic con‐
ditions an dbereadytobrak eata ll
times. #
Take intoa ccount thet raffic situation
befor ecallin gupt hestored speed. &
WARNING Risk of accident du etoinsuf‐
fi cient deceleration byActiveD ista nce
Assi stDISTRONIC
Ac tiveD ista nce Assi stDISTRONI Cbrakes
yo ur vehicle wit hupto5 0% ofthep ossible
deceleration. If this deceleration is no tsuffi‐
cient, ActiveD ista nce Assi stDISTRONIC
alerts youw ithav isualand acoustic warning. #
Adjus tyour speed and maintain asuita‐
ble dis tance from thev ehicle in front. #
Brak ethe vehicle yourself and/or take
ev asiv eaction. &
WARNING Risk of accident if de tection
function of ActiveD istan ce Assi st
DISTRONI Cisimpaired
Ac tiveD ista nce Assi stDISTRONI Cdoesn ot
re act or has alimited reaction:
R when drivin gonadiffe re nt lane or when
ch anging lanes
R topedestrians, animals, bicycles or sta‐
tionar yvehicles, or unexpected obs tacles
R tocomple xtraffic conditions
R tooncomin gvehicles and crossing traf fic
As aresult, ActiveD ista nce Assi stDISTRONIC
ma yneith er giv ewarnings nor inter vene in
su ch situations. #
Alwayso bser vethet raffic conditions
carefull yand react according ly. Ac
tiveD ista nce Assi stDISTRONI Cmaynotd etect
nar row vehicles driving in front, e.g. mo torcyc les
or vehicles no ttrave ling in line wit hyour vehicle.
Operating Activ eD ista nce Assis tDISTRONIC
Re quirements
R The vehicle has been star ted. It ma ytakeup
to twom inutes of driving be fore ActiveD is‐
ta nce Assi stDISTRONI Cisready foru se.
R The parking brak ehas been released.
R ESP ®
is activated and is no tinter vening.
R ActiveP arking Assis tisnotactivated.
R The transmissio nisinposition005B.
R The door sand tailgate/rear-en ddoor sare
closed.
R The driver's seat belt is fastened. Driving and parking
117

Ac
tivatin gActive Distance Assis tDISTRONIC #
Toactivat ewiththec urrent speed: briefly
press thec ruise cont rolleve rbriefly up 1or
down 4and take your foot offt he accelera‐
to rp edal.
The cur rent speed is stored and appear sin
th es peedome tera nd briefly in them ultifunc‐
tion displa y.
or #
Toactivat ewiththes tore ds peed: pullthe
cruise control le verb riefly in direction 3and
ta ke your foot offt he accelera torp edal.
The speed appear sinthe speedome tera nd
brief lyin them ultifunction displa y.
If yo udon otfull yrelease thea ccelerator pedal,
the Active Distance Assist Suspended message
appear sonthe multifunction displa y.The dis‐
ta nce toas lowe r-moving vehicle in front will then
no tbes et.T he position of thea ccelerator pedal
will de term ine thes peed.
When youp ullthec ruise cont rollev er towa rds
yo uf or thef irst time af ters tartin gt he vehicle,
Ac tiveD ista nce Assi stDISTRONI Cadoptst he
cur rent speed .Ifthe cur rent speed is less than
20 mph(30 km/h), ActiveD ista nce Assi st
DISTRONI Cadoptst he speed of 20 mph
(30 km/h).
Pulling away again with Activ eD ista nce
Assis tDISTRONIC #
Remo veyour foot from theb rake pedal. #
Brief lypull thec ruise cont rolleve rind irection
3.
or #
Depress thea ccelerator pedal briefly with
fo rc e.
The functions of ActiveD istan ce Assi st
DISTRONI Ccontinue tobe car ried out.
Deactivating Activ eD ista nce Assist
DISTRO NIC &
WARNING Risk of an accident du eto
Ac tiveD istan ce Assi stDISTRONI Cbeing
acti vewhen youl eave thed rive r's seat
If yo ul eave thed rive r's seat while thev ehicle
is being braked byActiveD ista nce Assi st
DISTRONI Conly,the vehicle can rollaw ay. #
Alwaysd eactivat eActiv eDista nce
Assi stDISTRONI Cand secur ethe vehi‐
cle topreve nt it from rolling away before
yo ul eave thed rive r's seat. #
Brief lypush thec ruise cont rolleve rfor wa rds
5 .
or #
Brak eifthevehicle is moving.
Increasing or reducing the speed #
Press thec ruise cont rolleve rup1or down
4 asfarast he 1s tpressur epoint.
The stored speed is increased or reduced by
1m ph (1 km/h).
or #
Press thec ruise cont rolleve rup1or down
4 beyond the1 stpressur epoint.
The stored speed is increased or reduced by
5m ph (1 0km/h).
Increasing or reducing the specifie ddistance
from the vehicl einf ront 11 8
Driving and pa rking