You use to have to "turn on" four wheel drive and Audi is proud of being one of the first with permanent four wheel, it just was all the time and it only worked front two or back two but now I think it can work left side or right side, whichever senses the best traction. There's all kinds of other stuff too (or use to be), "high" and "low" four wheel, etc.

I'm prejudiced with the Subaru :-) My dealer, when I bought it, made me come to a Saturday 4-hour workshop that was really exciting/interesting. They took us to the garage and had one up on a lift, showed us all the stuff underneath and how to change oil and transmission fluid, etc. The Subaru was different from most cars back then (2001?) and they did the classes for self-defense I think. They had stories of customers emptying out wrong fluids or towing the car wrong, etc. The oil amount is "odd" too so you can easily overfill it (so I never took it to Jiffy Lube or "cheap" places where young guys that didn't know/care might be doing the changing).

But I loved that car, named mine "Gyro", short for gyroscope as that's what it felt like to me driving up hills. It just felt really sure-footed. The only problem I ever had in snow was it being too small/low to the ground so if there was much snow, it couldn't get through. My daughter-in-law coveted it and husband and I are retired and go everywhere together so we tried making it with one car and gave her the Subaru, son sold her car and gave us the few hundred dollars he got for it and on we went. I got to driving more often again though so bought a used Ford Explorer (my husband couldn't drive/fit in the Subaru and he can an Explorer) and we use that as our snow car now.