Just about everything - including having one of the wheels falling off whilst moving!!!!!!!!!!!
It's unreliable, cranky and downright annoying at times, but it has such character that I couldn't never even think about parting with it!!
1972 Volkswagen Beetle 1200cc.
Absolutely fantastic!! I've never had a serious problem yet and I've had mine for 5 years now. If you are thinking of buying one my only advice is that there are lots out there so be choosey, don't buy the first one you see!
If the car has been looked after then you should be fine. Beetles are poor liars so if something looks wrong then walk away.
Mechanical parts and body parts are in abundance with not just the choice of supplier, but the choice of manufacturer too.
Go ahead and buy one. If you look after your Beetle it will look after you! (oh, and women love them!)