Purchase A3

Hello! I would like to buy the A3 as a diesel. I am actually a golf fan and am currently also driving the Golf V. Since I want to buy a diesel now, I am thinking which one is the right one for me. Since I don’t know Audi at all, it would be supi if one of you could call equipment recommendations and absolute “NOs”. Is there actually a semi-automatic air conditioning system at A, according to the Climatic in golf? Golfie 1976