MERCEDES-BENZ S CLASS 2018 Owners Manual

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

q
WA RNING Risk of accident from acceler‐
ation or braking by Ac tive Dis ta nce
Assi st DISTRONIC
Ac tive Dis ta nce Assi st DISTRONIC may accel‐
erate or brake in th e fo llowing cases, fo r
ex ample: R
If th e ve hicle pulls aw ay using Ac tive Dis‐
ta nce Assi st DISTRONIC.R
If th e st ored speed is called up and is
considerably fast er or slo we r th an th e
cur re ntly driven speed.R
If Ac tive Dis ta nce Assi st DISTRONIC no
longer de te cts a ve hicle in front or does
not re act to re le va nt objects.

R
When to wing a trailer

q
WA RNING Risk of accident in spi te of
ro ute-based speed adjustment
Ro ute-based speed adjustment might mal‐
function or be te mp orarily una va ilable in th e
fo llowing situations: R
If map data is not up to date or av ailableR
If yo u do not fo llow th e selected ro ute
guidance R
If th e set ro ute is re -plannedR
In ro ad con st ru ction areasR
When to wing a trailerR
In bad we ather or ro ad conditionsR
If th e accelerator pedal is depressed

If th e sy st em re aches a sy st em limitation or th e
driver has not st eered th e ve hicle fo r a consider‐
able period of time or has re mo ve d th eir hands
from th e st eering wheel, th e sy st em will,
depending on th e situation, fi rs t alert th e driver
with a visual wa rn ing. Display 1 appears in th e
multifunction displa y. If th e driver st ill does not
st eer th e ve hicle himself or herself, or st ill has
not ta ke n hold of th e st eering wheel, a re peated
wa rn ing to ne sounds in addition to th e visual
wa rn ing message to re mind th e driver to ta ke
control of th e ve hicle.
The wa rn ing message does not appear or disap‐
pears if one of th e fo llowing conditions are me t:R
The driver st eers th e ve hicle. R
The driver presses a st eering wheel button or
operates To uch Control.
Ac tive St eering Assist 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, fo r braking in good time
and fo r st ay ing in lane. Before ch anging lanes,
th e driver must make sure th at th e neighboring
lane is free (glance ov er th e shoulder).
Sy st em limitations
Ac tive St eering Assist has a limited st eering to r‐
qu e fo r lateral guidance. In some cases, th e
st eering inter ve ntion is not su ff icient to ke ep th e
ve hicle in th e lan e or to dr ive past ex its. Ac tive
St eering Assist cann ot pr ov ide th e driver with
st eering assis ta nce at traf fi c circles, T- intersec‐
tions, intersections, to ll st ations or turnings, fo r
ex ample.
The sy st em may be impaired or may not function
in th e fo llowing ins ta nces:R
In sno w, ra in, fo g, heavy spr ay , if th ere is
gl are or direct sunlight or if th ere are greatly
va ry ing ambient light or re fl ections, or stro ng
shado ws on th e ro ad.R
Insuf fi cient ro ad illumination. R
The windshield in th e area of th e camera is
dirty, fo gged up, damaged or co ve re d.R
Absence of lane markings, or se ve ra l unclear
lane markings, or if th e markings ch ange ra p‐
idl y. R
The dis ta nce to th e ve hicle in front is to o
small and th e lane markings th us cannot be
de te cted. R
The ro ad is nar row and winding. R
Obs ta cles on th e lane or projecting out into
th e lane.
The sy st em does not pr ov ide assis ta nce in th e
fo llowing conditions: R
On tight bends, traf fi c circles and when turn‐
ing. R
If yo u act iv ely ch ange lane without swit ch ing
on th e turn signal indicator. Driving and parking 205

q
WA RNING Risk of accident if Ac tive
St eering Assist unexpectedly st ops func‐
tioning
If th e sy st em limitations of Ac tive St eering
Assist are re ached th ere is no guarantee th at
th e sy st em will re main active or will ke ep th e
ve hicle in lane.

If no ve hicle is de te cted in th e adjacent lane and
a lane ch ange is permit te d, th e st eering wheel
symbol and th e ar row are shown in green 2 .
The /DQH &KDQJH WR WKH /HIW message appears,
fo r ex ample. If Ac tive Lane Change Assi st is acti‐
va te d with th e turn signal indicator but a lane
ch ange is not immediately possible, th e st eering
wheel symbol re mains green and th e ar ro w
appears gr ay 1 . When th e lane ch ange suppo rt
st arts, th e turn signal indicator is automatically
activated. If a lane ch ange is not possible within
th e defined length of time, th e ar row fa des out
and a new lane ch ange must be initiated. An
immediate lane ch ange is on ly possible on free‐
wa y section s without speed limits . If th e sy st em is impaired, Ac tive Lane Change
Assi st may be canceled. If it is canceled th e
/DQH &KDQJH &DQFHOHG message appears in th e
multifunction display and a wa rn ing to ne sounds.
q
WA RNING Risk of accident from ch ang‐
ing lane to an occupied adjacent lane
Lane Chan ge Assi st cannot al wa ys de te ct
clear ly if th e adjacent lane is free.
The lane ch ange might be initiated although
th e adjacent lane is not free.

ve hicle is decelerated in st ages to a st andstill. At
speeds below 40 mp h (6 0 km/h) th e hazard
wa rn ing lights switch on automaticall y.
When st ationary:R
The ve hicle is secured with th e electric park‐
ing brake. R
Ac tive Dis ta nce Assi st DISTRONIC is ended.R
The ve hicle is unloc ke d.R
If possible, an emer ge ncy call is placed to
th e Mercedes-Benz emer ge ncy call center.
The driver can cancel th e deceleration at any
time by per fo rm ing one of th e fo llowing actions:R
St eeringR
Depressing th e brake or accelera to r pedalR
Pressing a st eering wheel button or operat‐
ing To uch ControlR
Ac tivating or deacti va ting Ac tive Dis ta nce
Assi st DISTRONIC Ac tive Di st ance Assist DI STRO NIC displa ys in
th e instrument clus te r
The assis ta nce graphic and th e st atus display
show th e st atus of th e fo llowing functions in th e
instrument clus te r. R
Ac tive Dis ta nce Assi st DISTRONICR
Ro ute-based speed adjustment R
Ac tive St eering Assist
Assistance gr aphic
1
Ro ute-based speed adjustment (type of
ro ute eve nt)
2
Ve hicle ahead 3
Dis ta nce indica to r4
Set specified di st ance5
Own ve hicle208
Driving and parking