What do you have to pay attention to when buying a smart?

Hello guys, I want to get a smart at the end of 2024, I drive in moment 2 BMW’s (E36 323ti Compact and E39 525i Touring) which should also remain in my possession, but need for my wife a small car and the smart is suitable. However, since I have no idea about the smart at all, I want to inform myself before what are the weak points on the smart. But first of all my ideas: He has to be automatic and should definitely have a climate, the rest would be no matter. My ideas would be so Bj 2000 – 2005 or 6 Where are the weak points on the smart and what do I have to pay attention to? Furthermore, where are the differences in Moldel care, i.e. VFL and FL? I hope you can help me and thank me now. LG Stephan