brake sensor MERCEDES-BENZ CLA 2014 User Guide

PARKTRONIC
Important safety notes
PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It monitors the area
around your vehicle using six sensors in the
front bumper and six sensors in the rear
bumper. PARKTRONIC indicates visually and
audibly the distance between your vehicle
and an object.
PARKTRONIC is only an aid. It is not a
replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking
and exiting a parking space. When
maneuvering, parking or pulling out of a
parking space, make sure that there are no
persons, animals or objectsinthe area in
which you are maneuvering.
!When parking, pay particular attention to
objects above or below the sensors, such
as flower pots or trailer drawbars.
PARKTRONIC does not detect such objects
when they are in the immediate vicinity of
the vehicle. You could damage the vehicle
or the objects.
The sensors may not detect snow and other
objects that absorb ultrasonic waves.
Ultrasonic sources such as an automatic
car wash, the compressed-air brakes on a
truck or a pneumatic drill could cause
PARKTRONIC to malfunction.
PARKTRONIC may not function correctly on
uneven terrain.
PARKTRONIC is activated automatically when
you:
Rswitch on the ignition
Rshift the transmission to positionD,RorN
Rrelease the electric parking brake
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h). It is reactivated at lower
speeds.
Range of the sensors
General notes
PARKTRONIC does not take objects into
consideration that are:
Rbelow the detection range, e.g. people,
animals or objects
Rabove the detection range, e.g.
overhanging loads, truck overhangs or
loading ramps.
Sensors in the front bumper, left-hand
side (example)
Side view
Top view
The sensors must be free from dirt, ice or
slush. They can otherwise not function
correctly. Cleanthe sensors regularly, taking
Driving systems175
Driving and parking
Z

Display messagesPossible causes/consequences and
Solutions
SpeedLimitAssist
Inoperative
Speed Limit Assistis faulty.
XVisit a qualified specialist workshop.

Off
The HOLD function is deactivated. The vehicle is skidding.
Awarning tone also sounds.
XReactivate the HOLD function later (Ypage 172).
The HOLD function is deactivated. When the brakepedal is firmly
depressed, an activation condition is not fulfilled.
Awarning tone also sounds.
XCheck the activation conditions for the HOLD function
(Ypage 172).
Radar Sensors
Deactivated See
Operator's Manual
The radar sensor system is deactivated.
XSwitch on the radar sensor system (Ypage 208).
Lane Keeping
Assist Currently
Unavailable See
Operator's Manual
Lane Keeping Assist is deactivated and temporarily inoperative.
Possible causes are:
Rthe windshield in the camera's field of vision is dirty.
Rvisibility is impaired due to heavy rain, snow or fog.
Rthere are no lane markings for a longer period.
Rthe lane markings are worn, dark or covered, e.g.by dirtorsnow.
Whenthe causes stated above no longer apply, the display
message disappears.
Lane Keeping Assist is operational again.
If the display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 153).
XCleanthe windshield.
Lane Keeping
Assist Inoperative
Lane Keeping Assist is faulty.
XVisit a qualified specialist workshop.
230Display messages
On-board computer and displays

Display messagesPossible causes/consequences and
Solutions
Tire Press.
Monitor Currently
Unavailable
Due to a source of radiointerference, no signals can be received
from the wheel sensors.The tire pressure monitor is temporarily
malfunctioning.
XDrive on.
The tire pressure monitor restarts automatically as soon as the
problem has been solved.
TirePress.
Sensor(s) Missing
There is no signal from the tire pressure sensor of one or several
wheels. The pressure of the affected tire is not displayed in the
multifunction display.
XHave the faulty tire pressure sensor replaced at a qualified
specialist workshop.
Tire Pressure
Monitor
Inoperative No
Wheel Sensors
The wheels mounted do not have a suitable tire pressure sensor.
The tire pressure monitor is deactivated.
XMount wheels with suitable tire pressure sensors.
The tire pressure monitor is activated automatically after driving
for a few minutes.
Tire Press.
Monitor
Inoperative
The tire pressure monitor is faulty.
XVisit a qualified specialist workshop.
Vehicle
Display messagesPossible causes/consequences and
Solutions
Shiftto'P'or'N'
to Start Engine
You have attempted to start the engine with the transmission in
positionRorD.
XShift the transmission to positionPorN.
Auxiliary Battery
Malfunction
The auxiliary battery for the automatic transmission is no longer
being charged.
XVisit a qualified specialist workshop at the next opportunity.
XUntil then, set the automatic transmission to positionPbefore
you switch off the engine.
XBefore leaving the vehicle, apply the electric parking brake.
Depress Brake to
Start Engine
You have attempted to start the engine with the transmission in
positionNwithout depressing the brake pedal.
XDepress the brake pedal.
236Display messages
On-board computer and displays