Page 198 of 562
R
If th e sensors malfunction due to ot her ra dar
source inter fe re nce, fo r ex ample stro ng ra dar
re fl ections in parking ga ra ge s.R
If a loss of tire pressure or a defective tire
has been de te cted and displ ay ed.
The sy st em may not re act cor re ctly:R
In compl ex traf fi c st ations where objects
cannot alw ay s be clearly identified.R
To pedestrians or ve hicles if th ey mo ve
qu ickly into th e sensor de te ction ra nge.R
To pedestrians who are hidden by ot her
objects. R
If th e typical outline of a pedestrian cann ot
be distinguished from th e bac kg ro und.R
If a pedestrian is not re cognized as su ch , e.g.
due to special clo th ing or ot her objects.R
On bends with a tight ra dius. Setting Ac tive Brake Assi st
Multimedia sy st em:
Page 201 of 562

Ac tive Di st ance Assist DI STRO NIC
Fu nction of Ac tive Di st ance Assist
DI STRO NIC
Ac tive Dis ta nce Assi st DISTRONIC maintains th e
set speed on free-flowing ro ads. If ve hicles
ahead are de te cted, th e set dis ta nce is main‐
ta ined, if necessary until th e ve hicle comes to a
halt. The ve hicle accelerates or brakes depend‐
ing on th e dis ta nce to th e ve hicle in front and
th e set speed. Speed (in th e ra nge between
15 mp h (2 0 km/h) and 13 0 mp h (2 10 km/h))
and th e dis ta nce to th e ve hicle ahead are set
and sa ve d on th e st eering wheel. Other fe atures of Ac tive Dis ta nce Assi st
DISTRONIC: R
Ad justs th e driving st yl e depending on th e
selected drive program (fuel-saving, comfort‐
able or dynamic) ( →
page 17 2)R
Re sponds in urban speed ra nges to st ation‐
ary ve hicles (e xc ept bicycles, mo to rc yc les
and pedestrians) if conditions are suf fi cient
to enable de te ction. R
Initiates ra pid acceleration to th e st ored
speed, if th e turn signal indicator is switched
on to ch ange to th e ov er tak ing lane.R
Ta ke s one-sided ove rt aking re st ri ctions into
account on free wa ys or on multi-lane ro ads
with separate car ri ag ewa ys .
Ve hicles with Ac tive Pa rk ing Assis t: if th e ve hicle
has been braked to a st andstill on multi-lane,
separate car ri ag ewa ys by Ac tive Dis ta nce Assi st
DISTRONIC, it can au to matically fo llow th e ve hi‐
cle in front driving off again, within 30 seconds.
If a crit ical situation is de te cted when driving off,
a visual and acoustic wa rn ing is given indicating
th at th e driver must now ta ke control of th e ve hi‐
cle. The ve hicle is not accelerated any fur th er. Ac tive Dis ta nce Assi st DISTRONIC is only an aid.
The driver is re sponsible fo r th e dis ta nce to th e
ve hicle in front, fo r ve hicle speed and fo r braking
in good time.
Sy st em limitations
The sy st em may be impaired or may not function
in th e fo llowing ins ta nces, fo r ex ample: R
In sn ow , ra in, fo g, heavy spr ay , if th ere is
gl are, in direct sunlight or in great ly va ry ing
ambient light. R
The windshield in th e area of th e camera is
dirty, fo gged up, damaged or co ve re d.R
If th e ra dar sensors are dirty or co ve re d.R
On slippery ro ads, braking or accelerating
can cause th e drive wheels to lose traction
and th e ve hicle could th en skid. R
In parking ga ra ge s or on ro ads with st eep
uphill or downhill gradients.
Do not use Ac tive Dis ta nce Assi st DISTRONIC in
th ese situations. Driving and parking 19 9
Page 221 of 562

Ve hicles with Ac tive Pa rk ing Assist without a 360°
Camera
Ve hicles with Ac tive Pa rk ing Assist and a 360°
Camera Sy st em limitations
Pa rk ing Assist PA RKTRONI C does no t necessa‐
ri ly tak e into account th e fo llowing obs tac les:R
Obs ta cles bel ow th e de te ction ra nge, e.g.
pe rs ons, animals or objects. R
Obs ta cles ab ov e th e de te ction ra nge, e.g.
ov erhanging loads, ove rh angs or loading
ra mp s of truc ks .
The sensors must be free of dirt, ice and slush.
Otherwise, th ey may not function cor re ctly.
Clean th e sensors re gularly, tak ing care not to
scratch or damage th em.
Fu nction of th e passive side impact pr ot ec‐
tion
Pa ssive side impact pr ot ection is an additional
Pa rk ing Assist PA RKTRONI C function whic h
wa rn s th e driver about obs ta cles at th e side of
th e ve hicle. A wa rn ing is issued when obs ta cles
are de te cted between th e front and re ar de te c‐
tion ra nge. In order fo r an object to be de te cted,
th e sensors in th e front or re ar bumper must
de te ct th e object while yo u are drivin g past it. During th e parking procedure or maneuvering,
objects are de te cted as th e ve hicle drives past.
If yo u st eer in th e direction of a de te cted obs ta ‐
cle and th ere is a ri sk of a lateral collision, a
wa rn ing is issued. The lateral segments light up
oran g e or re d, depending on th e dis ta nce to th e
obs ta cle.
Segment color depending on distance
Color Lateral di st ance in cm
Re dA ppr ox . < 30
Orang eA ppr ox . 30 - 60
In order fo r lateral front or re ar segments to be
displa ye d, th e ve hicle must fi rs t tr ave l a dis ta nce
of at least half of th e ve hicle length. Once th e
ve hicle has tr ave led th e length of th e ve hicle, all
of th e lateral front and re ar segments can be dis‐
pla ye d. Driving and parking 21 9