The felt strip of the door trim panel is missing or has been incorrectly fitted in the area of the C-pillar.
Position the felt strip on the line of the door trim panel in the area of the C-pillar in the centre. After installation, the felt strip must not be visible.
(1) Positioning of the door trim panel felt strip
(2) Area of C-pillar
The blue clips of the door trim panel must always be replaced!