2007 MERCEDES-BENZ R320CDI parking sensors

291 Controls in detail
Driving systems
Parktronic* (Parking assist)
The Parktronic system is an electronic aid
designed to assist the driver during
parking maneuvers. It visually and audibly
indicates the relative distance between the
vehicle and an obstacle.
The Parktronic system is automatically
activated when you

switch on the ignition or start the
engine
and

release the parking brake
and

set the automatic transmission to
positionD,R, orNThe Parktronic system deactivates at
vehicle speeds exceeding approximately
11 mph (18 km/h). At lower vehicle
speeds, the Parktronic system turns on
again.
The Parktronic system also deactivates
when you set the automatic transmission
to positionP or depress the parking brake
pedal.
The Parktronic system monitors the
surroundings of your vehicle with six sen-
sors in the front bumper and four sensors
in the rear bumper.
1Sensors in the front bumper
Warning!G
Parktronic is a supplemental system. It is
not intended to, nor does it replace, the
need for extreme care. The responsibility
during parking and other critical maneuvers
always rests with the driver.
Special attention must be paid to objects
with smooth surfaces or low silhouettes
(e.g. trailer couplings, painted posts, or road
curbs). Such objects may not be detected by
the system and can damage the vehicle.
The operational function of the Parktronic
system can be affected by dirty sensors,
especially at times of snow and ice. See
“Cleaning the Parktronic system sensors”
(
page 414).
Interference caused by other ultrasonic
signals (e.g. working jackhammers, car
wash, or the air brakes of trucks) can cause
the system to send erratic indications, and
should be taken into consideration.
Warning!G
Make sure no persons or animals are in the
area in which you are maneuvering. You
could otherwise injure them.

292 Controls in detail
Driving systems
Range of the sensors
To function properly, the sensors must be
free of dirt, ice, snow and slush. Clean the
sensors regularly, being careful not to
scratch or damaging the sensors, see
“Cleaning the Parktronic* system sensors”
(
page 414).Front sensors
Rear sensors
Minimum distance
If the system detects an obstacle in this
range, all the distance warning segments
illuminate and you hear a warning signal. If
the obstacle is closer than the minimum
distance, the actual distance may no
longer be indicated by the system.
!During parking maneuvers, pay special
attention to objects located above or below the
height of the sensors (e.g. planters or trailer
hitches).
The Parktronic system will not detect such
objects at close range and damage to your
vehicle or the object may result.
Ultrasonic signals from outside sources (e.g.
working jackhammers, car wash or the air brakes
of trucks) may impair the operation of the
Parktronic system.
Centerapprox. 40 in (100 cm)
Cornersapprox. 24 in (60 cm)
Centerapprox. 48 in (120 cm)
Cornersapprox. 32 in (80 cm)
Centerapprox. 8 in (20 cm)
Cornersapprox. 6 in (15 cm)

293 Controls in detail
Driving systems
Warning indicators
Visual signals indicate to the driver the
relative distance between the sensors and
an obstacle. The warning indicator for the
front area is located above the center air
vents in the dashboard. The warning indi-
cator for the rear area is located in the rear
overhead control panel.
Front area warning indicator
1Left side of the vehicle
2Right side of the vehicle
3Readiness indicatorsEach warning indicator is divided into five
yellow and two red distance segments for
either side of the vehicle. The Parktronic
system is ready when the yellow readiness
indicators3 are illuminated.
The current transmission position deter-
mines which warning indicator will be
activated.As your vehicle approaches an object, one
or more distance segments will illuminate,
depending on the distance. When the
seventh distance segment illuminates, you
have reached the minimum distance.

Front area: An intermittent acoustic
warning lasting a maximum of
2 seconds will sound as the first red
distance segment illuminates and a
constant acoustic warning lasting a
maximum of 2 seconds will sound for
the second red distance segment. The
signal is canceled when the automatic
transmission is set to positionP or the
parking brake is set.

Rear area: An intermittent acoustic
warning lasting a maximum of
2 seconds will sound as the first red
distance segment illuminates and a
constant acoustic warning lasting a
maximum of 2 seconds will sound for
the second red distance segment. The
signal is canceled when the automatic
transmission is set to positionD, P, or
the parking brake is set.
Transmission
positionWarning indicator
DFront area activated
R or NFront and rear area
activated
PNeither activated

560 Index
O
Occupant Classification System see OCS
Occupant distribution 402
Occupant safety 72
Active head restraint 83
Air bags 74
Children and air bags 75, 86
Children in the vehicle 84
Fastening the seat belts 51
Front passenger front air bag of
indicator lamp 88, 92, 93
Infant and child restraint systems 85
LATCH-type child seat anchors 93
OCS 88
OCS, Messages in the multifunction
display 445–448
Seat belts 51, 76
OCS 88
Messages in the multifunction
display 445
Self-test 93
Odometer 157, 159
Oil level see Engine oil, Checking level
Oil see Engine oil
One-touch gearshifting 207
Operating safety 16Operator’s Manual 10
Ornamental moldings, Cleaning 413
Outside temperature see Displays
Overdue maintenance service term 408
Overhead control panel 33
Oxidation catalyst (diesel engine) 358
P
Paintwork code 526
Paintwork, Cleaning 411
Panic alarm 99
Panorama roof with power tilt/sliding
panel* 261
Cleaning 416
Convenience closing feature 256
Opening/closing 262
Roller sunblinds 261
Stopping 262
Summer opening feature 254
Synchronizing 264
Parcel nets 315
Parking 65, 351
Parking brake 57, 66
Lamps, Indicator and warning 421
Messages in the multifunction
display 453
Releasing 57Parking lamps 485
Messages in the multifunction
display 466
Replacing bulbs 484
Parktronic* (Parking assist) 291
Cleaning system sensors 414
Minimum distance 292
Range 292
Sensor cover 414
Switching on/off 294
System malfunction 294
System sensors 291
Warning indicators 293
Partition net* 308
Parts service 524
PASS AIR BAG OFF indicator lamp see
Front passenger front air bag of
indicator lamp
Passenger compartment 356
Fuse box 522
Interior lighting 153
Passenger safety see Occupant safety
Pedals 347
Phone see Telephone*
Plastic and rubber parts, Cleaning 416