C 350 (204.056) V6-3.5L (272.961) (2008)
3. Insert contour rings (5) in the holes of the bumper from outside.
The anti-twist locks of the contour rings (5) must be inserted vertically upwards in the cutouts of the bumper.
4. Position springs (4) on contour rings (5) and clip sensors (3) into the contour rings (5).
The sensors (3) are contacted on the quickpark wiring harness later on when installing the bumper.