2015 MERCEDES-BENZ E-CLASS ESTATE brake sensor

Problems with PARKTRONIC
Problem
Possible causes/consequences and
M
MSolutions Only the red segments
in the PARKTRONIC
warning displaysa
re lit.
You also hear awarning
tone for approximately
two seconds.
PARKTRONIC is then
deactivated and the
indicator lamp on the
PARKTRONIC button
lights up. PARKTRONIC has malfunctioned and has switched off.
X If problems persist, have PARKTRONIC checked at aqualified
specialist workshop. Only the red segments
in the PARKTRONIC
warning displaysa
re lit.
PARKTRONIC is then
deactivated. The PARKTRONIC sensors are dirty or there is interference.
X Cleant he PARKTRONIC sensors (Y page 389).
X Switch the ignition back on. The problem may be caused by an external source of radio or
ultrasound waves.
X See if PARKTRONIC functions in adifferent location. Active Parking Assist
General notes Active Parking Assist is an electronic parking
aid with ultrasound. It measures the road on
both sides of the vehicle. Aparking symbol
indicates asuitable parking space. Active
steering intervention and brake application
can assist you during parking. You may also
use PARKTRONIC (Y page 235).
i The active braking application is only
available on vehicles with automatic trans- mission.
Important safety notes Active Parking Assist is only an aid. It is not a
substitute for your attention to the immediate surroundings. The responsibility for safe
manoeuvring and parking remains with you.
Make sure that no persons, animals or
objectsa re in the manoeuvring range. When PARKTRONIC is switched off, Active
Parking Assist is also unavailable. G
WARNING
While parking or pulling out of aparking
space, the vehicle swings out and can drive
onto areas of the oncomingl ane. This could
cause you to collide with other road users.
There is arisk of an accident.
Pay attention to other road users. Stop the
vehicle if necessary or cancel the Active Park- ing Assist parking procedure.
! If unavoidable, you should drive over
obstacles such as kerbs slowly and not at a
sharp angle. Otherwise, you may damage
the wheels or tyres.
Active Parking Assist may also display spaces not suitable for parking, e.g.:
R parking or stopping prohibitions
R in front of drivewaysore ntrances and exits
R unsuitable surfaces Driving systems
239Driving and parking Z

The warning vibration occurs later if:
R the road has narrow lanes
R you cut the corner on abend Active Driving Assistance package
General notes The Active Drivin
gAssistance package con-
sists of DISTRONIC PLUS (Y page 217), Active
Blind Spot Assist (Y page 261) and Active
Lane Keeping Assist (Y page 263).
Active Blind Spot Assist General notes
Active Blind Spot Assist monitors the areas
on either side of the vehicle that are not visi-
ble to the driver with two lateral, rear-facing
radar sensors. Awarning display in the exte-
rior mirrors draws your attention to vehicles
detected in the monitored area. If you then
switch on the corresponding turn signal to
change lanes, you will also receive avisual
and audibl ecollision warning. If arisk of side
impact is detected, corrective braking may
help you avoid acollision. Active Blind Spot
Assist evaluates the free space in the direc-
tion of travel and to the side before making a course-correcting brake application. For this,Active Blind Spot Assist uses the forward-
facing radar sensors.
Active Blind Spot Assist supports you from a
speed of approximately 30 km/h.
Important safety notes
Active Blind Spot Assist is only an aid and is
not asubstitute for attentive driving. G
WARNING
Active Blind Spot Assist does not react to
vehicles:
R overtaking too closely on the side, placing
them in the blind spot area
R if the differenc einthe speed of approach
and overtaking is too great As
aresult, Active Blind Spot Assist may nei-
ther give warnings nor intervene in such sit-
uations. There is arisk of an accident.
Always pay careful attention to the traffic sit- uation and maintain asafe distanc eatthe side
of the vehicle.
Radar sensors
The Active Blind Spot Assist radar sensors are integrated into the fronta nd rear bumpers
and behind acover in the radiator trim. Make
sure that the bumpers and the cover in the
radiator trim are free of dirt, ice or slush. The
rear sensors must not be covered, e.g. by
bicycle racks or overhangin gloads. Following
as evere impact or in the event of damage to
the bumpers, have the function of the radar
sensors checked at aqualified specialist
workshop. Active Blind Spot Assist may oth-
erwise no longer function properly.
Monitoring range G
WARNING
Active Blind Spot Assist does not detect all
traffic situations and road users. There is a
risk of an accident.
Always make sure that there is sufficient dis-
tancetot he side for other traffic or obstacles. Example: Saloon Driving systems
261Driving and parking Z

Activ
eBlind Spo tAssist monitors the area up
to 3.0 mbehind your vehicle and directly next
to your vehicle, as shown in the diagram.
The detection of vehicles may be impaired in the case of:
R dirt on the sensor sorobscured sensors
R poor visibility, e.g. due to rain, snow or
spray
Vehicles in the monitoring range will then be
indicated late or not at all.
Active Blind Spot Assist may not detec tnar-
row vehicles, such as motorcycles or bicy-
cles, or may only detec tthem too late.
If the lanes are narrow, vehicles driving in the
lane beyond the lane nexttoy our vehicle may
be indicated, especially if the vehicles are not
driving in the middle of their lane. This may be the case if ther eare vehicles at the edge of
their lane.
Due to the nature of the system:
R warnings may be issued in error when driv-
ing close to crash barriers or similar solid
lane borders
R warnings may be interrupted when driving
alongside long vehicles, for example lor-
ries, for aprolonged time
Warning display :
Warnin gdisplay
Active Blind Spot Assist is not active at
speeds below approximately 30 km/h. Vehi-
cles in the monitoring range are then not indi-
cated. If Active Blind Spot Assist is activated, indi-
cator lamp
:in the exterior mirror slights up
yellow up to aspeed of 30 km/h. At speeds
above 30 km/h, the indicator lamp goes out
and Active Blind Spot Assist is operational.
If av ehicle is detected within the monitoring
range of Blind Spot Assist at speeds above
30 km/h, warning lamp :on the corre-
spondin gside lights up red. Awarning is
alway sissued when avehicle enters the mon-
itorin grange of Blind Spot Assist from behind
or from the side. When you overtake avehicle,
the warning only occur sifthe difference in
speed is less than 12 km/h.
The yellow indicator lamp goes out if reverse gear is engaged. Active Blind Spot Assist is
not operational.
The brightness of the warning lamps is auto-
matically adapted to the brightness of the
surroundings.
Visua land acoustic collision warning
If you switch on the turn signals to change
lanes and avehicle is detected in the side
monitoring range, you receive avisual and
acoustic collision warning. You then hear a
double warning tonea nd red warning lamp:
flashes. If the turn signal remains on, detec-
ted vehicles are indicated by the flashing of
red warning lamp :.There are no further
warning tones.
Course-correcting brak eapplication
If Active Blind Spot Assist detects arisk of a
side impact in the monitoring range, acourse-
correcting brake application is carried out.
This is designed to help you avoid acollision. G
WARNING
Ac ourse-correcting brake application cannot
alway spreven tacollision. There is arisk of an
accident.
Always steer ,brake or accelerat eyourself,
especially if Active Blind Spot Assist warns
you or makes acourse-correcting brake appli-
cation .Always maintain asafe distanc eatthe
sides. 262
Driving systemsDriving and parking

rear and side of yourv
ehicleare alsom oni-
tored with the aid of the rada rsensor system.
Active Lane Keeping Assist detects lane
markings on the road and can warn you
before you leave yourl ane unintentionally.If
you do not react to the warning, alane-cor-
recting application of the brakes can bring the
vehicl eback into the original lane.
This function is available withi naspeedrange
between 60 km/h and 200 km/h.
For Active Lane Keeping Assist to assist you
when driving, the rada rsensor system must
be operational.
Important safety notes
If you fail to adapt yourd riving style,Active
Lane Keeping Assist can neither reduce the
risk of an accident nor overrid ethe lawsof
physics. Active Lane Keeping Assist cannot
take account of road and weather conditions.
It may not detect traffic situations. Active
Lane Keeping Assist is only an aid.Y ou are
responsible for the distance to the vehicl ein
front, for vehicl espeed, for braking in good
time, and for staying in lane.
Active Lane Keeping Assist cannot continu-
ousl ykeep yourv ehicleini ts lane. G
WARNING
Active Lane Keeping Assist cannot always
clearly detect lane markings.
In such cases, Active Lane Keeping Assist
can:
R give an unnecessary warning and then
make acourse-correcting brake application
to the vehicle
R neither give awarning nor intervene
There is arisk of an accident.
Always pay particular attention to the traffic
situation and keep withi nthe lane, especially
if Active Lane Keeping Assist alerts you.T er-
minate the intervention in anon-critical driv-
ing situation. The system may be impaired or may not func-
tion if:
R there is poor visibility, e.g. due to insuffi-
cient illumination of the road ,ordue to
snow, rain, fog or spray
R there is glare, e.g. from oncoming traffic,
the sun or reflectio nfrom other vehicles
(e.g. if the road surface is wet)
R the windscreen is dirty ,misted up, dam-
agedorc overed, for instance by asticker,
in the vicinity of the camera
R the rada rsensors in the front or rear bump-
ers or the radiator trim are dirty ,e.g.
obscured by snow
R no or several, unclea rlane markings are
present for one lane, e.g. in aconstruction
area
R the lane markings are worn away,d ark or
covered up, e.g. by dirt or snow
R the distance to the vehicl einfront is too
smal land the lane markings thus cannot be
detected
R the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge
R the road is narrow and winding
R there are highly variable shad econditions
on the road
If no vehicl eisdetected in the adjacent lane
and broken lane markings are detected, no
lane-correcting brake application is made.
Warning vibratio nthrough the steering
wheel
Aw arning may be given if afront wheel
passes over alane marking. It willw arny ou by
means of intermittent vibration in the steer-
ing whee lfor up to 1.5 seconds.
Lane-correcting brake application G
WARNING
Al ane-correcting brake application cannot
alwaysb ring the vehicl eback into the original
lane. There is arisk of an accident. 264
Driving systemsDriving and parking

Display messages
Possible causes/consequences and
M
MSolutions J
Check brake fluid Check brake fluid
level level There is insufficien
tbrak efluidint hebrak efluidr eservoir.
In addition ,the red J warnin glamp lights up in th einstrument
cluster and awarnin gtones ounds.
G WARNING
Braking efficiency may be impaired.
There is ariskofana ccident.
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions. Do no tcontinu edriving
under any circumstances.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 205).
X Consult aqualified specialist workshop.
X Do no ttop up th ebrak efluid. This does no tcorrect thef ault. #
Check brake pad Check brake pad
wear wear The brak
epads/lining shaver eached their wear limit.
X Consult aqualified specialist workshop. G
inoperative inoperative On
eorm orem ain features of th eMercedes-Ben zConnect system
are malfunctioning.
X Hav ethe system checke dataqualified specialist workshop. Collision Preven‐
Collision Preven‐
tio
nA ssist Plus
tio nA ssist Plus
currently unavail‐ currently unavail‐
abl eS ee Owner's
abl eS ee Owner's
Manual Manual COLLISION PREVENTION ASSIST PLU
Sistemporarily inoperative.
Possibl ecauses:
R ther ada rsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radi osta-
tion soro ther source sofelectromagnetic radiation
R thes ystem is outside th eoperating temperature range
R theo n-bo ardv oltag eistoolow
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout.
COLLISION PREVENTION ASSIST PLU Sisoperational again.
If th edisplay message does no tdisappear:
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 205).
X Restart th eengine. Collision Preven‐
Collision Preven‐
tio
nA ssist Plus
tio nA ssist Plus
inoperative inoperative COLLISION PREVENTION ASSIST PLU
Sistemporarily inoperative
due to amalfunction .Adaptive Brake Assis tmay also hav efailed.
X Consult aqualified specialist workshop. Display
messages
303On-boardcomputer an ddisplays Z

Display messages
Possible causes/consequences and
M
MSolutions PRE-SAFE
PRE-SAFE
inoperative See inoperative See
Owner'
sManual
Owner' sManual Importan
tfunction sofPRE-SAFE ®
hav efailed. Al lother occupant
safet ysystems ,e.g.a irbags, remain available.
X Consult aqualified specialist workshop immediately. PRE-SAFE PRE-SAFE
Functions cur‐ Functions cur‐
rently rently
limited
limited See
See
Owner' sManual
Owner' sManual PRE
‑SAFE ®
PLU SorP RE‑SAFE ®
Brake is temporarily inoperative.
Possibl ecauses:
R thef unction is impaire ddue to heav yrain or snow
R ther ada rsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radi osta-
tion soro ther source sofelectromagnetic radiation
R AM Gvehicles: ESP ®
is deactivated
R thes ystem is outside th eoperating temperature range
R theo n-bo ardv oltag eistoolow
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout.
PRE ‑SAFE ®
PLU Sand PRE ‑SAFE®
Brake are operational again.
If th edisplay message does no tdisappear:
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 205).
X Restart th eengine.
X AM Gvehicles: reactivat eESP®
(Y page 85). PRE-SAFE
PRE-SAFE
Functions limited Functions limited
See Owner'
sManual
See Owner' sManual PRE
‑SAFE ®
PLU SorP RE‑SAFE ®
Brake is unavailable due to amal-
function .BAS PLU SwithC ross-Traffic Assis tmay also hav efailed.
X Consult aqualified specialist workshop. 304
Display
messagesOn-boardcomputer an ddisplays

Display messages
Possible causes/consequences and
M
MSolutions Radar sensors
Radar sensors
dirty See Owner's dirty See Owner's
Manual Manual At leas
tone of th efollowing drivin gsystems or drivin gsafet ysys-
tems is temporarily restricted or inoperative:
R COLLISION PREVENTION ASSIST PLUS
R PRE-SAFE ®
Brake
R PRE-SAFE ®
PLUS
R Active Lan eKeepin gAssist
R Active Blind Spot Assist
R DISTRONIC PLU SwithS teerin gAssista nd Stop&Go Pilot
If th erada rsensor system in fron tisdirty, Active Blind Spot Assist
will no tperform acourse-correcting brak eapplication.
Possibl ecauses:
R thes ensor sintheradiato rtrima nd/o rinthebumpers are dirty
R thef unction of th edrivin gsystem or drivin gsafet ysystem is
impaire ddue to heav yrain or snow
Aw arnin gtonea lso sounds.
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout.A lldrivin gsystems or drivin gsafet ysystems are opera-
tive again.
If th edisplay message does no tdisappear:
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 205).
X Switc hoffthee ngine.
X Clean th esensor s(Ypage 389) in th efollowing locations:
R in th eradiato rtrim
R in th efront bumper
R in th erear bumper, particularl yint he middle of th erear
bumper
X Restart th eengine.
The display message disappears. ü If this symbol appears in th
emultifunction display, aseat belt
tongue has been inserte dintoa rear seat belt buckle.
Further information on th estatu si nd icato rfor ther ear seat belts
(Y page 49). Display
messages
305On-boardcomputer an ddisplays Z

Display messages
Possible causes/consequences and
M
MSolutions DISTRONIC PLUS
DISTRONIC PLUS
available again available again DISTRONIC PLU
Sisoperational again after havin gbeen tempo-
rarily unavailable .You can no wreactivat eDISTR ONIC PLUS
(Y page 217). DISTRONIC
DISTRONIC
PLUS
PLUScur‐
cur‐
rently
rently unavailable
unavailable
See Owner' sManual
See Owner' sManual DISTRONIC PLU
Sistemporarily inoperative.
Steerin gAssista nd Stop&Go Pilo tare temporarily inoperative.
Possibl ecauses:
R thef unction is impaire ddue to heav yrain or snow
R ther ada rsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radi osta-
tion soro ther source sofelectromagnetic radiation
R thes ystem is outside th eoperating temperature range
R theo n-bo ardv oltag eistoolow
Aw arnin gtonea lso sounds.
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout.
DISTRONIC PLU Sisoperational again.
If th edisplay message does no tdisappear:
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 205).
X Restart th eengine. DISTRONIC PLUS
DISTRONIC PLUS
inoperative inoperative DISTRONIC PLU
Sisfaulty.
The following may hav ealso failed:
R BA SP LUSw ithC ross-Traffic Assist
R PRE-SAFE ®
Brake
R Steerin gAssista nd Stop&Go Pilot
Aw arnin gtonea lso sounds.
X Consult aqualified specialist workshop. DISTRONIC
DISTRONIC
PLUS
PLUSsus‐
sus‐
pended
pended You hav
edepressed th eaccelerato rpedal .DISTR ONIC PLU Sisno
longer controllin gthe speed of th evehicle.
X Remove your foot from th eaccelerato rpedal. DISTRONIC PLUS
DISTRONIC PLUS
---k m/h
---k m/h An activation condition fo
rDISTR ONIC PLU Sisnotfulfilled.
X Chec kthe activation condition sfor DISTRONIC PLUS
(Y page 217). Display
messages
319On-boardcomputer an ddisplays Z