air con

Hi all, I'm looking to buy this car here: https://www.olx.pt/d/anuncio/opel-astra-1-4-bertone-descapotvel-IDHJpER.html You can see that it does not have the AC button on the dash, but I contacted the advertiser and she said that it does have. Then I asked her to test it, and she said it works...

Hi im thinking of fitting air conditioning in my mk3 astra does anyone no what i will need and is it hard to fit cheers