Yann it sounds like the speaker in the sid has failed . It is attached (soldered) to the PCB within the SID unit .
A cheap fix that I have used in the past it to connect a small speaker ( eg as found in older computers ) .
Done by soldering two fly leads to the pins of the original speaker . I have then double sided tape that speaker to the outside of the SID unit .
If you want a more professional ( original ) fix , then you can buy replacement speakers from SAAB SID AC unit LCD pixel failure unit repairs DIY - new ribbon cable.
They also offer a repair service if you are not confortable working with delicate soldering on a PCB .
Yann , WHat other sounds are you expecting ? It will give the blinker click , and also beep for certain faults or steps in a convertible roof operation, eg Finished closing . If you have the blinker sounding , I suspect the job is good !
You may have warning chirps turned off ( I think that is available as an option in tech 2 ) or you may have no faults the sid whishes to bring to your attention . Well done on fitting a new speaker , I have found then finicky !
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