brake sensor MERCEDES-BENZ S CLASS 2018 Owners Manual

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st atus messages concerning th e ve hicle and
its individual components (e.g. number of
wheel re vo lutions/speed, decele ra tion, lat‐
eral acceleration, display of th e fast ened seat
belts) R
malfunctions or defects in impor ta nt sy st em
components (e.g. lights, brakes) R
information on ve hicle damage eve ntsR
sy st em re actions in special driving situations
(e.g. air bag deployment, inter ve ntion of st a‐
bility control sy st ems)R
ambient conditions (e.g. te mp erature, ra in
sensor)
In addition to pr ov iding th e actual control unit
function, th is data assists th e manufacturer in
de te cting and re ctifying malfunctions and opti‐
mizing ve hicle functions. The majority of th is
data is te mp orary and is only processed in th e
ve hicle itself. Only a small portion of th e data is
st ored in th e ev ent or malfunction memor y.
When yo ur ve hicle is serviced, te ch nical da ta
from th e ve hicle can be re ad out by service net‐
wo rk emplo ye es or th ird parties. Services
include re pair services, maintenance processes, wa rr anty eve nts and qu ality assurance meas‐
ures, fo r ex ample. The re ad out is per fo rm ed via
th e legally prescribed port fo r OBD ("on-board
diagnostics") in th e ve hicle. The re spective
service network locations or th ird parties col‐
lect, process and use th e data. They document
te ch nical st atuses of th e ve hicle, assist in fi nd ‐
i
ng malfunctions and impr ov ing qu ality and are
transmit te d to th e manufacturer, if necessar y.
Fu rt hermore, th e manufacturer is subject to
product liability. Fo r th is, th e manufacturer
re qu ires te ch nical da ta from ve hicles.
Malfunction memories in th e ve hicle can be
re set by a service outlet as part of re pair or
maintenance wo rk .
They can enter data into th e ve hicle's con ve ni‐
ence and inf ot ainment functions th emselves as
part of th e selected equipment.
This includes, fo r ex ample: R
multimedia data such as music, fi lms or pho‐
to s fo r playba ck in an integrated multimedia
sy st em R
address book data fo r use in connection with
an integrated hands-free sy st em or an inte‐
grated navigation sy st em R
entered navigation destinations R
data about th e use of Internet services
This data can be st ored locally in th e ve hicle or
is located on a device which yo u ha ve connected
to th e ve hicle. If th is data is st ored in th e ve hi‐
cle, yo u can dele te it at any time. This data can
only be transmit te d to th ird parties upon yo ur
re qu est with particular re ga rd to th e scope of
use of online services according to yo ur selected
settings.
Yo u can st ore or ch ange con ve nience settings/
individualization in th e ve hicle at any time.
Depending on th e eq uipment, th is inc ludes, fo r
ex ample: R
seat and st eering wheel position settings R
suspension and climate control settings R
individualization such as interior lighting
If yo ur ve hicle is accordingly equipped, yo u can
connect yo ur smartphone or ano th er mobile endGeneral no te s 27

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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:

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

Sy st em limitations
The de te ction capability of Blind Spot Assi st can
be re st ri cted in th e fo llowing situations:R
There is dirt on th e sensors or th e sensors
are obscured. R
When th ere is poor visibility, e.g. due to fo g,
heavy ra in, snow or spr ay .R
If nar row ve hicles are within th e monitoring
ra nge, e.g. bicycles.
Wa rn ings may be issued in er ro r when driving
close to crash ba rr iers or similar solid lane bor‐
ders. Wa rn ings may be inter ru pte d when driving
alongside long ve hicles, fo r ex ample truc ks , fo r a
prolonged time.
Blind Spot Assist is not operational when re ve rs e
ge ar is engaged.
Fu nction of braking applications (Active
Blind Spot Assist)
If Ac tive Blind Spot Assi st de te cts a ri sk of a side
impact in th e monitoring ra nge, a cou rs e-cor‐
re cting brake application is car ri ed out. This is
designed to help yo u av oid a collision. The course-cor re cting brake application is av aila‐
ble in th e speed ra nge between appr ox imately
20 mp h (30 km/h) and 12 5 mp h (200 km/h).
q
WA RNING Risk of accident despi te
brake application of Ac tive Blind Spot
Assi st
A cou rs e-co rr ecting brake application cann ot
alw ay s pr eve nt a collision.

R
There is gl are, e.g. from oncoming traf fi c, th e
sun or re fl ections.R
There is dirt on th e windshield in th e vicinity
of th e multifunction camera or th e camera is
fo gged up, damaged or obscured.R
No or se ve ra l, unclear lane markings are
present fo r one lane, e.g. in a construction
area. R
The lane markings are wo rn , dark or co ve re d.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 lane markings ch ange qu ickl y, e.g. lanes
branch off, cross one ano th er or mer ge .R
The ro ad is ve ry nar row and winding.
Ve hicles with Driving Assistance pac ka ge or
Driving Assistance Plus pa ck age: Ac tive Lane
Ke eping Assist uses ra dar sensors to monitor
se ve ra l areas around th e ve hicle. If th e ra dar
sensors in th e re ar bumper are dirty or co ve re d
with sn ow , th e sy st em may be impaired or may
not function. If an obs ta cle in th e lane in which yo u are drivin g has been de te cted, no lane-cor‐
re cting brake application occu rs .
Ac tivating Ac tive Lane Ke eping Assist
q
WA RNING Risk of accident despi te
Ac tive Lane Ke eping Assist wa rn ing
A lane-cor re cting brake application cannot
al wa ys bring th e ve hicle back into th e origi‐
nal lane.

Obser ve th e fo llowing when selecting, mounting
and re placing tires:R
Only use tires and wheels of th e same type
(summer tires, winter tires, MOEx te nded
tires) and th e same make.R
Only mount wheels of th e same size on one
axle (left and ri ght).
It is only permissible to ins ta ll a dif fe re nt
wheel size in th e eve nt of a fl at tire in order
to drive to th e specialist wo rk shop.R
Only mount tires of th e cor re ct size onto th e
wheels. R
Ve hicles with a tire pressure monitoring
sy st em: All moun te d wheels must be equip‐
ped with functioning sensors fo r th e tire
pressure monitoring sy st em.R
At te mp eratures below 45 °F (7 °C), use win‐
te r tires or all-season tire mar ke d M+S fo r all
wheels.
Wi nter tires bearing th e M snowflake sym‐
bol in addition to th e M+S marking pr ov ide
th e best possible grip in wintry ro ad condi‐
tions. R
Fo r M+S tires, only use tires with th e same
tread. R
Obser ve th e maximum permissible speed fo r
th e M+S tire mounted.
If th is is below th e ve hicle's maximum speed,
th is must be indicated in an appropriate label
in th e driver's fi eld of vision. R
Break in new tires at moderate speeds fo r
th e fi rs t 60 miles (100 km). R
Re place th e tires af te r six ye ars at th e latest,
re ga rd less of we ar. R
When re placing with tires that do no t fe a‐
ture ru n-flat ch aracteristics: ve hicles with
MOExtended tires are not equipped with a
TIREFIT kit at th e fa ctor y. Equip th e ve hicle
with a TIREFIT kit af te r re placing with tires
th at do not fe ature ru n-flat ch aracteristics,
e.g. winter tires.
Fo r more information on wheels and tires, con‐
ta ct a qu alified specialist wo rk shop.
Be sure to also obse rv e th e fo llowing fur th er
re lated subjects: R
No te s on tire pressure ( →
page 41 4) R
Ti re and Loading In fo rm ation placard
( →
page 420) R
Ti re size designation, load-bea ri ng capacity,
speed ra ting and load ind ex ( →
page 428)R
Ti re pressure ta ble ( →
page 41 6)
Note s on inter ch anging wheels
q
WA RNING Risk of inju ry th ro ugh dif fe r‐
ent wheel sizes
Inter ch anging th e front and re ar wheels if th e
wheels or tires ha ve dif fe re nt dimensions
may se ve re ly impair th e driving ch aracteris‐
tics.
The wheel brakes or wheel suspension com‐
ponents may also be damaged.

Distance re corder
see Tr ip dis ta nce
DI STRO NIC
see Ac tive Dis ta nce Assi st DISTRONIC
Door
Locking (me ch anical ke y) ...................... 65
Opening (from inside ) ............................ 62
Po we r closing function .......................... 65
Un locking (from inside) ........................ .6 2
Un locking (mechanical ke y) .................. .6 5
Door cont ro l panel .................................... .1 2
Door cont ro l panel (rear passenger
compartment) ............................................ 14
DO T, Ti re Identification Nu mber (TIN) ... 426
Drinking and driving ................................ 16 8
Drink s holder
see Cup holder
Driv e Awa y Assist .................................... 230
Drive position
Selecting .............................................. 17 5
Driv e prog ra m display ............................. 17 3 Driv e prog ra ms
see DY NA MIC SELECT
Driving light
see Au to matic driving lights
Driving saf et y sy st em ............................ .1 88
ABS (Anti-lock Braking Sy st em) ........... 18 9
Ac tive Brake Assi st .............................. 19 2
BA S (Brake Assi st Sy st em) .................. 18 9
EBD (electronic brake fo rc e distribu‐
tion) ................................. ..... ............... 19 2
ESP ®
(Electronic St ability Prog ra m)
Crosswind Assist ................................. 19 1
Overview ............................................. 18 8
Ra dar sensors .................................... .1 88
Re sponsibility ...................................... 18 8
ST EER CONTROL ................................. 19 2
Drivin g sy st em
see 360° camera
see Ac tive Blind Spot Assi st
see Ac tive Dis ta nce Assi st DISTRONIC
see Ac tive Lane Ke eping Assist
see Ac tive Pa rk ing Assist
see Ac tive Speed Limit Assi st
see Ac tive St eering Assist
see AIR BO DY CO NTROL see AT TENTION ASSIST
see Blind Spot Assist
see Cruise cont ro l
see Driving saf et y sy st em
see HOLD function
see MAGIC BO DY CO NTROL
see Night Vi ew Assi st
see Pa rk ing Assist PA RKTRONI C
see Re ar view camera
see Tr af fi c Sign Assi st
Drivin g tips
Drinking and drivin g ............................ 16 8
Gene ra l driving tips ............................ .1 68
No te s on breaking-in a new ve hicle ..... 16 8
Dr ow siness de te ction
see AT TENTION ASSIST
Dynamic handling control sy st em
see ESP ®
(Elect ro nic St ability Prog ra m)
DY NA MIC SELECT ................................... .1 72
Con fi guring drive program I ................. 17 3
Displ ay ing engine data . .
...................... .1 73
Displ ay ing ve hicle data ........................ 17 3
Drive prog ra m display ......................... .1 73
Drive prog ra ms ................................... .1 72Index 531