2017 MERCEDES-BENZ C-Class COUPE parking sensors

Problems with PARKTRONIC
ProblemPossible causes/consequences andMSolutions
Only the red segments in
the PARKTRONIC warn-
ing displaysare lit. You
also hear awarning tone
for approximately two
seconds.
PARKTRONIC is then
deactivated and the indi-
cator lamp on the
PARKTRONIC button
lights up.PARKTRONIC has malfunctioned and has switched off.
XIf problems persist, have PARKTRONIC checked at aqualified spe-
cialist workshop.
Only the red segments in
the PARKTRONIC warn-
ing displaysa re lit.
PARKTRONIC is then
deactivated.The PARKTRONIC sensors are dirty or there is interference.
XClean the PARKTRONIC sensors (Ypage 296).
XSwitch the ignition back on.
The problem may be caused by an external source of radio or ultra-
sound waves.
XSee 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
as uitable parking space. Active steering inter-
vention and brake application can assist you
during parking and when exiting aparking
space. You may also use PARKTRONIC
(
Ypage 174).
Important safety notes
Active Parking Assist is merely an aid. It is not a
replacement for your attention to your immedi-
ate surroundings. You are always responsible
for safe maneuvering, parking and exiting a
parking space. Make sure that no persons, ani-
mals or object sare in the maneuvering range.
When PARKTRONIC is switched off, Active Park-
ing Assist is also unavailable.
GWARNING
While parking or pulling out of aparking
space, the vehicle swings out and can drive
onto areas of the oncomingl ane. This could
result inacollision with another road user.
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 obsta-
cles such as curbs slowly and not at asharp
angle. Otherwise, you may damage the
wheels or tires.
Active Parking Assist may also display spaces
not suitable for parking, e.g.:
Rwhere parking or stopping is prohibited
Rin front of driveways or entrances and exits
Ron unsuitable surfaces
Parking tips:
ROn narrow roads, drive as close to the parking
space as possible.
RParking spaces that are littered or overgrown
might be identified or measured incorrectly.
RParking spaces that are partially occupied by
trailer drawbars might not be identified as
such or be measured incorrectly.
RSnowfall or heavy rain may lead to aparking
space being measured inaccurately.
Driving systems177
Driving and parking
Z

cycleracks or overhanging loads. Following a
severe impact or in the event of damag etothe
bumpers, have the function of the radar sensors
checke dataq ualified specialist workshop.
Blind Spot Assist may no longer work properly.
Monitoring area
In particular, the detection of obstacles can be
impaired if:
Rthere is dirt on the sensors or anything else
covering the sensors
Rthere is poo rvisibility,e .g. duetof og, heavy
rain, snow or spray
Rthere are narro wvehicles, e.g. motorcycle sor
bicycles
Rthe roadh asvery wide lanes
Rthe roadh asnarro wlanes
Ryoua re not driving in the middleoft he lane
Rthere are barriers or similar lane borders
Vehicles in the monitoring rang eare then not
indicated.
Blind Spot Assist monitors the are aupto10ft
(3 m) behind your vehicle and directl ynext to
your vehicle ,asshown in the diagram.
If the lanes are narrow, vehicle sdriving in the
lane beyond the lane next to your vehicle may be
indicated ,especially if the vehicle sare not driv-
ing in the middleoft heirlan e. Thism ay be the
case if there are vehicle sdriving at the inner
edg eoft heirlan es. Due to the nature of the system:
Rwarnings may be issue
dinerrorw hend riving
clos etoc rashb arriers or similar solid lane
borders.
Rthe warning is cancele dwhend riving for an
extended period next to long vehicles, such as
trucks.
Warning display
:Warning display
Blind Spot Assist is not active at speeds below
approximately 20 mph (30 km/h). Vehicles in
the monitoring rang eare then not indicated.
If av ehicle is detected within the blind spot
monitoring rang eatspeeds above 20 mph
(30 km/h), warning lamp :on the correspond-
ing sid elights up red .Thisw arning is always
emitted whe navehicle enters the blind spot
monitoring rang efrom behind or from the side.
Whe nyou overtake avehicle ,the warning only
occurs if the difference in speed is less than
7m ph (12 km/h).
If yo uselect the reverse gear, Blind Spot Assist
is not operational.
The brightnes softhe warning lamps is auto-
matically adapted to the brightnes softhe sur-
roundings.
Collision warning
If av ehicle is detected in the monitoring rang eof
Blind Spot Assist and yo uswitch on the corre-
sponding turn signal ,adoublew arning tone
sounds. Re dwarning lamp :flashes. If the turn
signal remains on, vehicle sdetected are indica-
ted by the flashing of red warning lamp :.
There are no further warning tones.
192Drivin gsystems
Drivin gand parking

The detection of obstacles can be impaired in
the case of:
Rthere is dirt on the sensors or anything else
coveringthe sensors
Rpoor visibility, e.g. due to rain, snow or spray
Vehicles in the monitoring range are then not
indicated.
Active Blind Spot Assist may not detect narrow
vehicles, such as motorcycles or bicycles, or
may only detect them too late.
If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may be
indicated, especially if the vehicles are not driv- ing in the middle of their lane. This may be the
case if there are vehicles at the inner edge of
your lane.
Due to the nature of the system:
Rwarnings may be issued in error when driving
close to crash barriers or similar solid lane
borders.
Rwarnings may be interrupted when driving
alongside particularly long vehicles, e.g.
trucks, for aprolonged time.
Warning display
:Warning display
Active Blind Spot Assist is not operational at
speeds below approximately 20 mph (30 km/h).
Vehicles in the monitoring range are then not
indicated.
If av ehicle is detected within the blind spot
monitoring range at speeds above 20 mph
(3 0k m/ h),w arnin glamp :on the correspond-
ing side lights up red. This warnin gisalways
emitted when avehicle enters the blind spot
monitoring range from behind or from the side.
When you overtake avehicle, the warnin gonly
occurs if the differenc einspeed is less than
7m ph (12 km/h). If you select the reverse gear, Active Blind Spot
Assis
tisnot operational.
The brightness of the warnin glamps is auto-
matically adapted to the brightness of the sur-
roundings.
When Active Blind Spot Assis tisactivated, gray
radar waves propagatin gbackwards appear
nex ttot he vehicle in the assistance display in
the multifunction display. Abov easpeed of
20 mph (30 km/h), the color of the radar waves
in the assistance display changes to green ;.
Active Blind Spot Assis tisthen ready for use.
Visua land acoustic collision warning
If you switc honthe turn signals to change lanes
and avehicle is detected in the side monitoring
range, you receiv eavisual and acoustic collision
warning. You will then hear adouble warning
ton eand red warnin glamp :flashes. If the turn
signal remainso n, detected vehicles are indica-
ted by the flashingofr ed warninglamp :.
There are no further warnin gtones.
Course-correcting brake application
If Active Blind Spot Assis tdetects arisk of alat-
eral collision in the monitoring range, acourse-
correcting brake application is carried out. This
is meant to assist you in avoiding acollision.
GWARNING
Ac ourse-correctin gbrake application cannot
always preventac ollision.There is arisk of an
accident.
Always steer ,brake or accelerate yourself,
especially if Active Blind Spot Assis twarns
you or makes acourse-correctin gbrake appli-
cation. Always maintain asafe distance at the
sides.
196Driving systems
Driving and parking

Alwayspayparticula rattentio ntothe traffic
situatio nand kee pwithint he lane, especially
if Active Lane Keeping Assist alerts you. Ter-
minate the interventio ninanon-critica ldriv-
ing situation.
The system maybei mpaired or maynot function
if:
Rther eisp oorvisibility ,e.g.d ue to insufficient
illuminatio nofthe road, or du etosnow,rain,
fog or spray
Rther eisg lare,e.g.f rom oncoming traffic, the
sunorr eflections (e.g. when the roa dsurface
is wet)
Rthe windshield is dirty,f ogged up,damag ed or
covered ,for instance by asticker, in the vicin-
ity of the camera
Rthe rada rsensors in the front or rea rbum pers
or the radiato rtrim ar edirty,e .g.o bscured by
snow
Rther eareno, severa lorunclea rlan em arkings
for alan e, e.g .inareas with roa dconstruction
work
Rthe lane marking sareworn away ,darkorc ov-
ere dup,e.g .byd irtors now
Rthe distance to the vehicl einfront is too small
and the lane marking sthusc annotbed etec-
ted
Rthe lane marking schange quickly, e.g .lan es
branch off, cros sone another or merge
Rthe roa disnarrow and winding
Rtherearestrong shadows cas tonthe road
If no vehicl eisdetectedint he adjacent lane and
broken lane marking saredete
cted, no lane-cor-
recting brake applicatio nism ade.
Warning vibration in the steering wheel
Aw arning maybeg iven if afront whee lpasses
ove ralanem arking .Itw illw arny ou by means of
intermittent vibratio ninthe steering whee lfor
up to 1.5 seconds.
Lane -correcting brake application
If you leave you rlane, unde rcertai ncircumstan-
ces the vehicle will brake briefly on one side.
Thisism eant to assist you in bringing the vehicle
back to the original lane.
GWARNING
Al ane-correcting brake application cannot
always bring the vehicle back into the original lane. Thereisar isk of an accident.
Always steer, brake or accelerate yourself,
especially if Active Lane Keeping Assis twarns
you or makes alane-correcting brake appli-
cation.
If al ane-correcting brake application occurs,
display :appear sinthe multifunction display.
The brake application also slightly reduces vehi-
cle speed.
Thisf unctio nisavailable in the range between
40 mph and 120 mph (60 km/h and 200 km/h).
Al ane-correcting brake application can be made
after driving over alanem arking detected as
being solid or broken. Before this, awarning
must be give nbym eans of intermittent vibration
in the steering wheel. In addition, alanew ith
lane markings on both sides must be recog-
nized.
In the case of abroken lane marking being
detected,al ane-correcting brake application
can only be mad eifavehicle has beend etected
in the adjacent lane. Oncoming vehicles ,over-
taking vehicles and vehicles in adjacent lanes
can be detected.
iAf urthe rlane-correcting brake application
can only occur after you rvehicle has returned
to the original lane.
No lane-correcting brake application occurs if:
Ryou clearly and actively steer, brake or accel- erate.
Ryou cut the corner on asharp bend.
Ryou have switched on the turn signal.
Rad riving safety system intervenes, e.g. ESP®,
PRE-SAFE®Brake or Active Blind Spot Assist.
198Driving systems
Drivin gand parking