Skoda 2013 Octavia A7 Owner's Manual page 205

WARNING (Continued)
Never drive if parts of the inner door panel have been removed and the re-
■
sulting openings have not been properly sealed.
Never drive if the loudspeakers in the doors have been removed, unless the
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loudspeaker openings have been properly sealed.
Always make sure that the openings are covered or filled if additional loud-
■
speakers or other equipment parts have been installed in the inner door pan-
els.

Taking care of and cleaning the vehicle
203