2018 MERCEDES-BENZ C-CLASS SEDAN warning light

Activating/deactivating Parking Assist
PARKTRONIC
dSwitc hon th edashboar d
eSwitchin th ecenter console
:Deactivates or activates Parking Assis t
PARKTRONI C
;Indicatorlamp
If indicator lamp ;lights up, Parking Assis t
PARKTRONI Cis deactivated. Parking Pilo tis
then also deactivated.
iParking Assis tPARKTRONI Cis automati-
call yactivated when you tur nth eSmartKey to
position 2in th eignition lock.
Problems with Park ing Assist PARKTRONIC
ProblemPossible causes/consequences and MSolutions
Only thered segments in
th eParking Assis t
PARKTRONI Cwarning
displays are lit .You also
hear awarning tone for
approximately two sec -
onds.
Parking Assis t
PARKTRONI Cis then
deactivated and th eindi-
cator lamp on th e
PARKTRONI Cbutto n
lights up.Parking Assis tPARKTRONI Chas malfunctioned and has been deacti -
vated.
XIf problem spersist, hav eParking Assis tPARKTRONI Cchecke dat a
qualified specialis tworkshop .
Only thered segments in
th eParking Assis t
PARKTRONI Cwarning
displays are lit .Parking
Assis tPARKTRONI Cis
then deactivated.The Parking Assis tPARKTRONI Csensor sare dirty or there is inter-
ference .
XClean th eParking Assis tPARKTRONI Csensor s (Ypage 312).
XSwitchth eignition bac kon .
The problem may be caused by an external source of radi oor ultra-
soun dwaves.
XChec kto see if Parking Assis tPARKTRONI Cworks at adifferen t
location .
190Driving systems
Driving and parking

Multimedia display
The rear view camera may show a distorted view
of obstacles, show them incorrectly or not at all.
The rear view camera does not show objects in
the following positions:
Rvery close to the rear bumper
Runder the rear bumper
Rin close range above the handle on the trunk
lid
!Objects not at ground level may appear to
be further away than they actually are, e.g.:
Rthe bumper of a parked vehicle
Rthe drawbar of a trailer
Rthe ball coupling of a trailer tow hitch
Rthe rear section of an HGV
Ra slanted post
Use the guidelines only for orientation.
Approach objects no further than the bottom-
most guideline.
:Yellow guide line at a distance of approx-
imately 13 ft (4.0 m) from the rear of the
vehicle
;White guide lines without steering input,
vehicle width including the exterior mirrors
(static)
=Yellow guide lines for vehicle width including
the exterior mirrors, for current steering
input (dynamic)
?Yellow lanes marking the course the tires
will take at the current steering wheel angle
(dynamic)
AYellow guide line at a distance of approx-
imately 3 ft (1.0 m) from the rear of the vehi-
cle
BVehicle center axle (marker assistance)
CBumper
DRed guide line at a distance of approximately
12 in (0.30 m) from the rear of the vehicle
When the transmission is shifted to position k,
guide lines appear in the camera image.
The distance specifications only apply to
objects that are at ground level.
EFront warning display
FRear warning display
GAdditional vehicle icon as Parking Assist
PARKTRONIC measurement operational
readiness indicator
Vehicles with Parking Assist PARKTRONIC:
When Parking Assist PARKTRONIC is opera-
tional, vehicle icon (
Ypage 189), appears on the
multimedia system display G. If the Parking
Assist PARKTRONIC warning displays are active
or light up, warning displays Eand Fare also
active or light up correspondingly on the multi-
media system display.
192Driving systems
Driving and parking

:Parking space markings
=White guide lines – for current steering input
White guide lines =should be as close to par-
allel with parking space markings :as possi-
ble.
XTurn the steering wheel to the center position while the vehicle is stationary.
?Red guide line at a distance of approximately
12 in (0.30 m) from the rear of the vehicle
AWhite guide lines – no steering input
BEnd of parking space
XBack up carefully until you have reached the
final position.
The red guide line ?is then at the end of the
parking space B. The vehicle is almost par-
allel in the parking space.
"Wide-angle" function
:Symbol for the wide-angle view function
;Your vehicle
=Warning displays for Parking Assist
PARKTRONIC
You can also use the rear view camera to select
a wide-angle view.
When Parking Assist PARKTRONIC is opera-
tional (
Ypage 189), a symbol for your own vehi-
cle appears in the multimedia system display. If
the Parking Assist PARKTRONIC warning dis-
plays are active, warning displays =light up on
the multimedia system display in yellow or red
accordingly.
Object detection
The rear view camera helps detect moving and
stationary objects. If an object (person, vehicle
or other obstacle) is detected, this object is
marked with a bar. Objects located some dis-
tance from the vehicle away are marked with a
yellow bar. If the distance to the object is very
small, the bar is displayed in red.
Object detection only works in wide-angle view.
To ensure that you can use the function, it must
be switched on in the multimedia system (see
the Digital Operator's Manual).
360° camera
General notes
The 360° camera is a system consisting of four
cameras.
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Driving and parking

sors. A warning lamp lights up in the exterior
mirrors and draws your attention to vehicles
detected in the monitored area. If you then
switch on the corresponding turn signal to
change lane, you will also receive an optical and
audible warning.
Blind Spot Assist supports you from a speed of
approximately 20 mph (30 km/h).
Important safety notes
GWARNING
Blind Spot Assist does not react to:
Rvehicles overtaken too closely on the side,
placing them in the blind spot area
Rvehicles which approach with a large speed
differential and overtake your vehicle
As a result, Blind Spot Assist may not give
warnings in such situations. There is a risk of
an accident.
Always observe the traffic conditions care-
fully, and maintain a safe lateral distance.
Blind Spot Assist is only an aid. It may fail to
detect some vehicles and is no substitute for
attentive driving. Always ensure that there is
sufficient distance to the side for other road
users and obstacles.
iUSA only:
This device has been approved by the FCC as
a "Vehicular Radar System". The radar sensor
is intended for use in an automotive radar
system only. Removing, tampering with, or
altering the device will void any warranties,
and is not permitted by the FCC. Do not tam-
per with, alter, or use in any non-approved
way.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
Radar sensors
The radar sensors for Blind Spot Assist are inte-
grated into the rear bumper. Make sure that the bumpers are free from dirt, ice or slush. The
sensors must not be covered, for example by
cycle racks or overhanging loads. Following a
severe impact or in the event of damage to the
bumpers, have the function of the radar sensors
checked at a qualified 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 poor visibility, e.g. due to fog, heavy
rain, snow or spray
Rthere are narrow vehicles, e.g. motorcycles or
bicycles
Rthe road has very wide lanes
Rthe road has narrow lanes
Ryou are not driving in the middle of the lane
Rthere are barriers or other road boundaries
Vehicles in the monitoring range are then not
indicated.
At a distance of around 1.6 ft (0.5 m) ;from the
vehicle, Blind Spot Assist monitors the area up
to 10 ft (3 m) next to =and behind :your
vehicle, as shown in the picture.
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 driving at the inner
edge of their lanes.
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 long vehicles, e.g. trucks, for a pro-
longed time.
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Driving and parking
Z

Warning lamp
:Warning lamp
Blind Spot Assist is not active at speeds below
approximately 20 mph (30 km/h). Vehicles in
the monitoring range are then not indicated.
If a vehicle is detected within the blind spot
monitoring range at speeds above 20 mph
(30 km/h), warning lamp :on the correspond-
ing side lights up red. This warning is always
emitted when a vehicle enters the blind spot
monitoring range from behind or from the side.
When you overtake a vehicle, the warning only
occurs if the difference in speed is less than
7 mph (12 km/h).
If you select the reverse gear, Blind Spot Assist is not operational.
The brightness of the warning lamps is auto-
matically adapted to the brightness of the sur-
roundings.
Collision warning
If a vehicle is detected in the monitoring range of
Blind Spot Assist and you switch on the corre-
sponding turn signal, a double warning tone
sounds. The red warning lamp flashes on the
relevant exterior mirror. If the turn signal
remains on, detected vehicles are indicated by
the flashing of the red warning lamp on the exte-
rior mirror. There are no further warning tones.
Switching on Blind Spot Assist
XMake sure that Blind Spot Assist is activated
in the on-board computer (Ypage 223).
XTurn the SmartKey to position 2in the igni-
tion lock.
The red warning lamps on the exterior mirrors
light up until the engine is started.
Display in the assistance graphic
When Blind Spot Assist is activated, gray radar
waves propagating backwards appear next to
the vehicle in the assistance display in the mul-
tifunction display (
Ypage 221). Above a speed
of 20 mph (30 km/h), the color of the radar
waves in the assistance graphic changes to
green :. Blind Spot Assist is then ready for use.
Lane Keeping Assist
General notes
Lane Keeping Assist monitors the area in front of
your vehicle by means of multifunction cam-
era:which is attached behind the top of the
windshield. Active Lane Keeping Assist detects
lane markings on the road and can warn you
before you leave your lane unintentionally.
This function is available in the range between
40 mph and 120 mph (60 km/h and 200 km/h).
A warning may be given if a front wheel passes
over a lane marking. It will warn you by means of
intermittent vibration in the steering wheel for
up to 1.5 seconds.
202Driving systems
Driving and parking

Important safety notes
GWARNING
Lane Keepin g Assist cannot always clearly
detect lane markings.
In such cases, Lane Keepin g Assist can:
Rgive an unnecessary warning
Rnot give a warning
There isa risk of an acc ident.
Always pay particular attention to the traff ic
situation and keep within the lane, especial ly
if Lane Keepin g Assist alerts you.
GWARNING
The Lane Keepin g Assist warning does not
return the veh icleto the original lane. There is
a risk of an acc ident.
You should always steer, brake or accelerate
yourself, inparticular ifwarned byLane Keep-
ing Assist.
Lane Keepin g Assist can neither reduce the risk
of an acc identif you fail to adapt your driving
style nor overr idethe laws of physics. Lane
Keepin g Assist cannot take into account the
road, traff icand weather conditions. Lane Keep-
ing Assist ismerely an aid.You are responsible
for the distance to the veh icle infront, for veh i-
cle speed, for braking ingood time and for stay-
ing inyour lane.
The Lane Keepin g Assist does not keep the veh i-
cle inthe lane.
The system may beimpaired or may not function
if:
Rthere ispoor vis ibility, e.g. due to insuff icient
illumi nation of the road, or due to snow, rain,
fog or spray
Rthere isglare, e.g. from oncoming traffic, the
sun or reflection from other veh icles (e.g. if
the road surface iswet)
Rthe windshield is dirty, fogged up, damaged or
covered, for instance bya sticker, inthe vicin-
ity of the camera
Rthere are no, several or unclear lane markings
for a lane, e.g. inareas with road construction
work
Rthe lane markings are worn away, dark or cov-
ered up, e.g. by dirtor snow
Rthe distance to the vehicle infront is too small
and the lane markings thus cannot be detec-
ted
Rthe lane markings change quickly, e.g. lanes
branch off, cross one another or merge
Rthe road isnarrow and winding
Rthere are highly variable shade conditions on
the roadway
Activating/deactivating Lane Keeping
Assist
XTo activate: press button ;.
In dicator lamp :lights up. The Lane Keep‐
ingAssistOnmessage appears in the mul-
tifunction display. If all conditions have been
satisfied, there may be a warning.
If you drive at speeds above 40 mph
(60 km/h) and lane markings are detected,
the lines inthe assistance graphics display
(
Ypage 221) are shown in green. Lane Keep-
ing Assist is ready for use.
XTo deactivate: press button;.
Indicator lamp :goes out. Lane Keeping
Assist is deactivate d.The Lane Keeping
Assist Offmessage appears inthe multi-
function display.
Selecting Standard or Adaptive setting
XIn the DriveAssistmenu on the on-board
computer, select the LaneKeepingAssistfunction (Ypage 223).
XSelectStandardorAdaptive.
Standard
When Standard
is selected, no warning vibra-
tion occurs if:
Driving systems203
Driving and parking
Z

Ryou switch on thetur nsignals. In this event ,
th ewarnings are suppressed for acertain
period of time.
Ra drivin gsafet ysystem intervenes, e.g. ABS,
BA Sor ES P®.
Adaptive
Whe nAdaptive
is selected, no warnin gvibra-
tion occur sif:
Ryou switch on th etur nsignals. In this event ,
th ewarnings are suppressed for acertain
period of time.
Ra drivin gsafet ysystem intervenes, e.g. ABS,
BA Sor ES P®.
Ryou accelerate hard, e.g. kickdown .
Ryou brakehard.
Ryou steer actively, e.g. swerve to avoid an
obstacle or chang elanes quickly.
Ryou cut th ecorner on ashar pbend.
In order that you are warned only when neces-
sar yand in goo dtime if you cross th elan emark-
ing, th esystem recognizes certain condition s
and warn syou accordingly.
The warnin gvibration occur searlier if:
Ryou approac hth eouter lan emarking on a
bend.
Rth eroa dhas ver ywide lanes, e.g. afreeway.
Rth esystem detects soli dlan emarkings.
The warnin gvibration occur slater if:
Rth eroa dhas narrow lanes
Ryou cut th ecorner on aben d
Driving Assistance PLUS package
Gene ral notes
The Drivin gAssistance Plus packag econsist sof
Distanc ePilo tDISTRONI C (Ypage 171), Active
Blind Spot Assis t (Ypage 204) and Active Lan e
Keepin gAssis t (Ypage 207).
Active Blind Spot Assist
Generalnotes
Active Blind Spot Assis tuses arada rsensor
system, pointe dtoward th erear of th evehicle,
to monitor th earea to th eside sof th evehicl e
whic hth edriver is unable to see . Awarnin glamp
lights up in th eexterio rmirror sand draw syour
attention to vehicles detecte din th emonitore darea
.If you then switch on th ecorrespondin g
tur nsignal to chang elane, you will also receiv e
an optica land audibl ewarning. If aris kof lateral
collision is detected, corrective brakin gmay
help you avoid acollision .Befor e acourse-cor-
recting brak eapplication ,Active Blind Spot
Assis tevaluates th espac ein th edirection of
travel and at th eside sof th evehicle. Fo rthis,
Active Blind Spot Assis tuses th eforward-facing
rada rsensors.
Active Blind Spot Assis tsupport syou from a
speed of approximately 20 mph (30 km/h).
Important safety notes
Active Blind Spot Assist isonly an aid and is not
a substitute for attentive driving.
GWARNING
Active Blind Spot Assist does not react to:
Rvehicles overtaken too closely on the side,
placing them in the blind spot area
Rvehicles which approach with a large speed
differential and overtake your vehicle
As a result, Active Blind Spot Assist may ne i-
ther give warnings nor intervene insuch sit-
uations. There isa risk of an accident.
Always observe the traffic conditions care-
fully, and maintain a safe lateral distance.
iUSA only: This device has been approved by
the FCC as a "Vehicular Radar System". The
radar sensor is intended for use inan auto-
motive radar system only. Removal, tamper-
ing, or altering of the device willvoid any war-
ranties, and isnot permitted by the FCC. Do
not tamper with, alter, or use inany non-
approved way.
Any unauthorized modification to this device
could void the user's authority to operate the
equipment.
iCanada only: This device complies with
RSS -210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause interference,
and
2. This device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the device
will void an
y warranties, and is not permitte
d.
204Driving systems
Driving and parking

Do not tamper with, alter, or use in any non-
approved way.
Any unauthorized modification to this device
could void the user's authority to operate the
equipment.
Radar sensors
The Active Blind Spot Assist radar sensors are
integrated into the front and rear bumpers and
behind a cover in the radiator trim. Make sure
that the bumpers and the cover in the radiator
grill are free of dirt, ice or slush. The rear sensors
must not be covered, for example by cycle racks
or overhanging cargo. Following a severe impact
or in the event of damage to the bumpers, have
the function of the radar sensors checked at a
qualified specialist workshop. Active Blind Spot
Assist may otherwise no longer work properly.
Monitoring area
GWARNING
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-
tance on the side for other traffic or obstacles.
At a distance of approximately 1.6 ft (0.5 m);
from the vehicle, Active Blind Spot Assist mon-
itors the area up to 10 ft (3 m) next to =and
behind :your vehicle, as shown in the picture. The detection of obstacles can be impaired in
the case of:
Rthere is dirt on the sensors or anything else
covering the 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 you are
driving alongside particularly long vehicles,
such as trucks, for a prolonged time.
Warning lamp
:Warning lamp
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 a vehicle is detected within the blind spot
monitoring range at speeds above 20 mph
(30 km/h), warning lamp :on the correspond-
ing side lights up red. This warning is always
emitted when a vehicle enters the blind spot
monitoring range from behind or from the side.
When you overtake a vehicle, the warning only
occurs if the difference in speed is less than
7 mph (12 km/h).
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Driving and parking
Z