Seller Hidden > no airbag in the passat

Hello, I have a problem maybe with one can give a advice. I bought my Passat 3b V6 4Motion on 11.01.2006 in Wolfburg from a large VW dealer. First of all I got no grants or similar…I just got a normal contract in my hand where also in it stands that I forego warranties. So with the Passat already when buying the airbag lamp lit… the seller told me that this error was fixed and that the a lles again works, only the error would have to be read out then the lighting would also stop…as stupid as I am I believed it. (you could do that yourself at the moment nihct because your reading device is defective at the moment) Ok then about a week later I drove to my VW Wrkstatt and had it read out.So what was of course the lighting did NOT listen to it be something else=teureres. Was then still 3 times in the workshop nobody got the error away. So today the let ze Werksatt visit I told you before, if you don’t get the mistake away then please find out what it is. Conclusion: -Passenger airbag no longer available -Side airbags after a trigger only stuffed in the near and seam closed so it is probably an accident car but in the contract is “not Baknnt” whether accident or not So the purchase is now over a year ago and warranties had not received anyway, but such a car to sell is not normal? or!???!!??? Can I take legal action now?