Have airbags reliably controlled?

Hello, is someone known if it is possible with the FOH to have the airbags tested reliably (no, not trigger)? Due to a case in the family got in the pondering. short to the history: Unfortunately only some time after the purchase did I find out that I bought a total damage for (far too) expensive money. Must say, that everything is in general super repaired. Split dimensions in general and also no real abnormalities. BUT: the right side has been completely brushed out, open sight I included B column and rear fender li + re. Also doors and trunk flap and glazing. Change was no longer possible… the dealer no longer existed shortly after my purchase. The GW trade already with another owner – according to lawyer that was hopeless. So I still have it today. I know everyone thinks that you can see it etc… but it is top repaired! I found only one too. Welding seam in the roof channel. So then gradually everything came (with a lot of here) The car was taken into payment after only 2 years for just 4000 euros, because the previous owner bought a new car. Then he went away with a Polish tug and was not allowed. Therefore, even despite checkbook the KM stand is rather inconspicuous… Now I’m not quite sure about the airbags anymore. Alas… the light works – goes out shortly after the start. Greeting Christian