
The
cover is fixed by 7 clips

Open
the flap and pull it gently until the 3 lower clips are detached.
Then insert
something like a hook into the air vent and carefully detach the 4 upper clips.
Finally, remove the 4 screws fixing the radio.
Mounting the loudspeakers

More powerful speakers usually have a higher mounting depth than the OEMs,
To make sure there is still enough space between the bottom of the speaker and the lowered side
window,
I had to increase the speaker's mounting base by 15mm.