
Up
toaspeed ofapproximately 44mph
(70 km/h), BrakeAssist withcross-t raffic
function mayreact to:
R stationary objectsinthe path ofyour vehi-
cle, e.g. stopped orparked vehicles
R pedestrians inthe path ofyour vehicle
R obstacles crossingyourpath which movein
the detection rangeofthe sensors andare
detected
i If
Brake Assist withcross-t rafficfunction
requires aparticularl yhigh braking force,
preventative passengerprotectionmeasures
(PRE-SAF E®
)are activated atthe same time
(Y page 55).
X Keep thebrake pedaldepressed untilthe
emergency brakingsituation isover.
ABS prevents thewheels fromlocking.
Brake Assist withcross-t rafficfunction is
deactivated andthebrakes function asusua l
agai nif:
R you release thebrake pedal
R there isno longer arisk ofcollision
R no obstacle isdetected infront ofyour vehi-
cle
R you depress theaccelerator pedal
R you activate kickdown Active
BrakeAssis t
General information i
Observe
the"Important safetynotes" sec-
tion (Ypage 60).
Act ive Brake Assist consists ofadistance
warning function withanautonomous braking
function andAdaptive BrakeAssist.
Act ive Brake Assist canhelp youtominimize
the risk ofacollision withthevehicle infront
or reduce theeffects ofsuch acollision.
If Act ive Brake Assist detects thatthere isa
risk ofcollision, youwillbewarned visually
and acousticall y.Ifyou donot react tothe vis-
ual collision warningorthe warning tone,
autonomous brakingcanbeinitiated incritical
situations. Ifyou apply thebrake yoursel fin a
critical situation, AdaptiveBrakeAssist ofthe
Act ive Brake Assist system supports you. Importa
ntsafety notes In
particular, thedetection ofobstacles canbe
impaired if:
R there isdirt onthe sensors oranything else
covering thesensors
R there issnow orheavy rain
R there isinterferenc eby other radarsources
R there arestrong radarreflections, forexam-
ple inparking garages
R anarrow vehicle istraveling infront ,e.g. a
motorbike
R avehicle istraveling infront onadifferent
line
R you aredriving anew vehicle orservicing on
the Active Brake Assist system hasjust
been carried out
Observe theimportant safetynotesinthe
"Breaking-in notes"section (Ypage 125).
Followi ngdamage tothe front endofthe vehi-
cle, have theconfiguration andoperation of
the radar sensor checked ataqual ified spe-
cialist workshop. Thisalso appli estocollisions
at slow speeds wherethereisno visible dam-
age tothe front ofthe vehicle.
Activating/ deactivating Act
ive Brake Assist isautomaticall yactive
after switching onthe ignition.
You canactivate ordeactivate Active Brake
Assist usingtheon-board computer
(Y page 198). When deactivated, thedistance
warning function andtheautonomous braking
function arealso deactivated.
If Act ive Brake Assist isdeactivated, the00D4
symbol appearsinthe assistance graphicdis-
play .
Distance warningfunction General
information
The distance warningfunction canhelp youto
minimize therisk ofafront -end collision witha
vehicle aheadorreduce theeffects ofsuch a
collision. Ifthe distance warningfunction
detects thatthere isarisk ofacollision, you
will bewarned visuallyand acousticall y. Driving
safetysystems
63Safety Z

exitin
gaparking space.Makesurethatthere
are nopersons ,animals orobjec tsinthe
maneuverin garea when youaremaneuverin g
or parking .
! When
parking ,pay particular attentionto
objec tsabove orbelow thesensor s,such as
flower potsortrailer drawbars.
PARKTRONIC doesnotdetect suchobjec ts
when theyareinthe immediate vicinityof
the vehicle. Youcould damage thevehicle
or the objec ts.
The sensor smay notdetect snowandother
objec tsthat absorb ultrasonic waves.
Ultrason icsources suchasan automatic car
wash, thecompr essed-air brakesonatruc k
or apneumatic drillcould cause
PARKTRONIC tomalfunct ion.
PARKTRONIC maynotfunc tion correctlyon
uneven terrain.
Parkin gAssist PARKTRONIC isactivat edauto-
matically whenyou:
R switch onthe ignition
R shift thetran smission toposition 005B,005Eor
005C
R release theelectr icparking brake
Parkin gAssist PARKTRONIC isdeactivat edat
speeds above11mph (18km/ h).It is rea cti-
vate dat lowe rspe eds.
Rang eof the senso rs Gen
eral notes
Pa rking AssistPAR KTRONIC doesnot take into
acco untobstacl eslocate d:
R bel ow the dete ction range,such asper sons ,
ani mal sor obje cts
R ab ove thedete ction range,e.g. overhanging
lo ad s,tai lsecti onsorload ing ram psof
trucks 0043
Senso rsinthe front bumpe r,left-ha ndside
(e xamp le)
The sens orsmus tbe free from dirt, ice or
slu sh. The ycan othe rwisenot functi oncor-
rectl y.Clea nthe sens orsregularl y,taki ngcare
not toscra tchordamag ethem (Ypage 275 ).
Rang e Front
sensors Ce
nter Appr
ox.40in(app rox.
100 cm) Co
rners Appr
ox.24in(app rox.
60 cm) Dri
ving sys tems
173Dri ving and parkin g Z

Rear
sensors Cen
ter Ap
pro x.48 in(appr ox.
12 0cm) Corn
ers Ap
pro x.32 in(appr ox.
80 cm) Min
imum distance Cen
ter Ap
pro x.8in (appr ox.
20 cm) Corn
ers Ap
pro x.6in (appr ox.
15 cm) If
th ere isan obs taclewit hin this ran ge, the
rel evan twarn ingdisp lays lightup and awarn -
ing tone soun ds.Ifth edist ancefalls belowthe
min imum ,th edist ancemay nolonger be
sho wn.
Wa rning displa ys Warn
ingdisp layforthefron tarea
0043 Segme ntson thelef t-han dside oftheveh i-
cle
0044 Segme ntson therig ht-hand side ofthe
veh icle
0087 Oper ationalread inessseg men ts
The warn ingdisp lays showthedist ance
bet ween thesen sorsand theobs tacle.The
warn ingdisp layforthefron tarea isloc ate don
th edash boardabov eth ece nter air ven ts.The
warn ingdisp layfortherear area isloc ate don
th eco ver behi ndtheseat sin therear
pass enger compar tment.
The warn ingdisp layforeac hside oftheveh i-
cle isdivi ded intofiv eyellow andtworedseg-
men ts.If yellow operationalread inessseg -
men ts0087 ligh tup, Park ingAssist PARKTRO NIC
is oper ational. The
selected trans mis sion position and the
dire ction inwhic hth eveh icleis rol lingdet er-
min ewhic hwarn ingdisp layisact ive when the
en gin eis run ning. Tr
ans mission posi-
ti on Wa
rning displa y 005B
Fr
on tarea active 005E,
005Cortheveh i-
cle isrol lingbac k-
wards Rear
andfron tareas
act ive 005D
No
areas active On
eor mor eseg men tsligh tup astheveh icle
appr oaches anobs tacle,depe nding onthe
veh icle's dist ancefrom theobs tacle.Inaddi-
ti on ,warn ingtone sare issued.
When thedist anceto theobs tacleissuf ficien t,
you willhear aninterm itte nt warn ingtone .The
sho rter thedist anceto theobs tacle,the
sho rter thefrequen cyoftheint erm itte nt warn -
ing tone sbec ome s.When themin imum dis-
tan ceisreac hed, youhear aco ntinu ous warn -
ing tone .
Deact ivating/a ctivating Parking Assis t
PAR KTRONIC 0043
Deact ivat es/ activat esPark ingAssist
PA RKTRO NIC
0044 Indic ato rlamp
If ind icat orlamp 0044ligh tsup, Park ingAssist
PA RKTRO NICis deac tivat ed. Active Park ing
As sis tis then also deac tivat ed.
i Park
ingAssist PARKTRO NICis auto mati-
call yact ivat edwhen youturnth eSm artKey
to pos ition 0048intheign ition lock. 174
Driv
ingsyst emsDriv ingand parki ng

Problems
withParking AssistPARKTRONIC Problem
Possible
causes/co nsequences and0050 0050
Solutions Only
thered segments
in the Parking Assist
PARKTRONIC warning
display sare lit.You also
hear awarning tonefor
approximately twosec-
onds.
Parking Assist
PARKTRONIC isdeacti-
vated afterapprox-
imately fiveseconds
and theindicator lamp
in the Parking Assist
PARKTRONIC button
lights up. Parking
AssistPARKTRONIC hasmalfunction edand hasbeen deac-
tivated.
X Ifproblems persist,haveParking AssistPARKTRONIC checkedat
a quali fiedspecialist workshop. Only
thered segments
in the Parking Assist
PARKTRONIC warning
display sare lit.Parking
Assist PARKTRONIC is
deactivated after
approximately fivesec-
onds. The
Parking AssistPARKTRONIC sensorsaredirty orthere isinter-
ferenc e.
X Clean theParking AssistPARKTRONIC sensors(Ypage 275).
X Switch theignition backon. The
problem maybecaused byan extern alsource ofradio orultra-
sound waves.
X Check tosee ifParking AssistPARKTRONIC worksatadifferent
location. Active
Parking Assist
General notes Act
ive Parking Assistisan electron icparking
aid with ultrasound. Itmeasures theroad on
both sides ofthe vehicle. Aparking symbol
indicates asuitable parkingspace.Active
steering intervention canassist youduring
parking andwhen exiting aparking space.You
can also stilluse Parking AssistPARKTRONIC
(Y page 172).
Import antsafety notes Act
ive Parking Assistismerely anaid. Itis not
a replacement foryour atten tiontoyour imme-
diate surroundings. Youarealwa ysresponsi-
ble forsafe maneuvering, parkingandexiting a
parking space.Makesurethatnopersons, ani-
mals orobject sare inthe path ofyour vehicle.
When Parking AssistPARKTRONIC isdeactiva-
ted, Active Parking Assistisalso unavaila ble. G
WARNING
While parking orpulli ngout ofaparking
space, thevehicle swingsoutand candrive
onto areas ofthe oncomin glane. Thiscould
cause youtocollide withother roadusers or
object s.There isarisk ofan accident.
Pay atten tiontoother roadusers orobject s.
Stop thevehicle ifnecessary orcancel the
Act ive Parking Assistparking procedure. G
WARNING
While parking orpulli ngout ofaparking
space, thevehicle swingsoutand candrive
onto areas ofthe oncomin glane. Thiscould
cause youtocollide withother roadusers or
object s.There isarisk ofan accident.
Pay atten tiontoother roadusers orobject s.
Stop thevehicle ifnecessary orcancel the Driving
systems
175Drivingandparking
Z

G
WARNING
Active BlindSpotAssist doesnotreact to:
R vehicl esovertaken tooclosel yon the side ,
pla cing them inthe blind spot area
R vehicl eswhi chapp roach withalarg e
spee ddiffer ential andovertake yourvehi-
cle
As aresu lt,Active BlindSpotAssist maynei-
ther givewarnings norintervene insuch sit-
ua tions. There isarisk ofan accide nt.
Alwa ysobse rvethe traffic conditions care-
full y,and maintai nasafe latera ldista nce.
i USA
only:This devicehas been approved
by the FCC asa"Veh icularRadar System" .
The rada rsensor isintended foruse inan
au tomotive radarsystem only.Remo val,
tamperi ng,oralteri ngofthe devi cewillvoid
any warranties, andisnot permi ttedbythe
FCC. Donot tamper with,alter, oruse inany
non-approve dway .
Any unau thorized modification tothis device
coul dvoid theuser 'sau thority toopera te
the equipme nt.
i Ca
nada only:This devicecompli eswith
RSS-210 ofIndustry Canada .Opera tionis
sub ject tothe followi ngtwo conditions:
1. This devicemay notcaus einterference,
and
2. This devicemust accept anyinterference
receive d,includ inginterference thatmay
caus eundes iredopera tionofthe devi ce.
Remo val,tamperi ng,oralteri ngofthe
devi cewillvoid anywarranties, andisnot
permi tted.Donot tamper with,alter, oruse
in any non-approve dway .
Any unau thorized modification tothis device
coul dvoid theuser 'sau thority toopera te
the equipme nt.
Radar sensors
The rada rsensors forActive BlindSpotAssist
are integrated inthe rear bump erand inthe
radi ator trim. Make surethatthebump ersand
radi ator trim arefree from dirt,iceand slush.
The rear sensors mustnotbecovered ,for
exampl eby cycle racks oroverha ngingcargo.
Follo wing asevere impactor inthe event of
dama getothe bump ers,have thefunction of
the rada rsensors checked ataqua lified spe- cial
istworksho p.Active BlindSpotAssist may
otherwi seno longer workprope rly.
Moni toring area G
WARNING
Active BlindSpotAssist doesnotdetect all
traffic situations androad users.There isa
risk ofan accide nt.
Alwa ysmake surethatthere issuffi cient
dista nceonthe side forother traffic or
obstacl es. Active
BlindSpotAssist monitors thearea up
to 10 ft(3.0 m)behi ndyou rvehicl eand
dire ctly next toyou rvehicl e,as show nin the
dia gram.
The detection ofobstacl escan beimpa iredin
the case of:
R there isdirt onthe sensors oranythi ngelse
covering thesensors
R poor visibility, e.g. due torain, snow or
spra y
Vehi cles inthe monitoring rangearethen not
indica ted.
Active BlindSpotAssist maynotdetect narrow
vehicl es,such asmotorcycle sor bicy cles, or
may onlydetect themtoolate.
If the lanes arenarrow ,vehicl esdrivi nginthe
lane beyond thelane next toyou rvehicl emay
be indica ted,espe ciallyifthe vehicl esare not
drivi nginthe midd leof their lane. Thismay be
the case ifthere arevehicl esdrivi ngatthe
inner edgeoftheir lanes . Drivi
ngsystems
185Drivingand parking Z