'Check airbag' error in RS 250

I have a problem with 'check airbag' error which appears randomly on dash. I cannot see any rule when it appears or goes off.

I spend few ours searching various forums regarding this issue and I found out this is common problem with Megane Mk2. More specifically, the connector under seat is getting loose mainly because of moving front seat back and forward.


Today I checked mine and it looks that cables are fixed more wisely comparing to what I have seen on Mk2 photos:

Anyway I wiggled the cables and unplug from the socket but without any effect..




Has anyone got simmilar problem with RS 250 or any other Mk3? Any help much appreciated!

 

I took it to electromechanic and he run some test on OBD port.
Using Delphi DS150e tool he found out error in airbag section.
Unfortunately it was 'unknown error' with strange code 80B71E28 (nothing in google about this one[FONT=Roboto Slab, Times New Roman, serif]).[/FONT]