Mercedes-Benz Body & Equipment Guideline for Metris - BM 447, Version November 27, 2015.
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Please observe the revision notes compared to 09/18/2015 ! Only print out complete sections of the current version!
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9.7 Driver assistance systems
9 Electrical system
9.7.8 Parking assistance systems
PARKTRONIC
•
If approved detachable parts are retrofitted,
it is necessary to have PARKTRONIC coded
with the appropriate parameter record by your
Mercedes-Benz partner.
•
After-market painting of the bumper is not permit-
ted with the PARKTRONIC ultrasonic sensors fitted.
The coat of paint impairs the emission and recep-
tion of the ultrasonic signals.
!
Note
Sensors which are already painted must not be
re-painted or touched up.
In order to ensure that they function correctly
throughout their operating life, sensors must be
painted before being installed.
Unpainted sensors and sensors painted in a range of
colors are available from Mercedes-Benz.
The maximum thickness the paint coat on the cover
may have without impairing sensor operation is
120 µm. This also includes repeated paint applications
and the coat of cathodic dip paint (KTL coat). The
KTL coat thickness is between 12 µm and 25 µm.
It is therefore necessary to make spot checks of the
paint coat thickness to ensure faultless operation of
the sensors.
It is essential that not only the cover itself but also the
cylindrical edge of the sensor cover be coated with
paint evenly all the way round and covering at least
2 mm.
2
1
N98.00-2170-00
Area of cylindrical edge of the sensor cover to be
painted
1 Area to be painted
2 Maximum coat thickness 120 µm
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Note
The coat of paint may not be ground off mechani-
cally, as this could damage the chromate/cathodic
dip coating or the sensor covering.
!
Note
If the surface has been cathodic dip primed, the
paint must not be removed by chemical means as
this could damage the cathodic dip coating. A new
coating cannot be applied afterwards. Nor is it
permitted to touch up damaged areas chemically or
mechanically.
!
Note
Attachment parts fitted in the detection range of the
sensors may impair operation of the PARKTRONIC
system (e.g. trailer hitch, overhangs of bodies, wheel
carriers, steps, brush guards).
