Hi,
I can tell you, what i know about Lupo 3L.
Once upon a time i wanted buy this car. But when i found, that special AT- gearbox isn't good part of this car (from 2 owners announced). Need special services every 20-30 000km (don't know exactly interval) and is there big chance gearbox damage. Repair is over 2-3 000 Eur. One plus was, that i found some guy from Poland who repair broken gearbox Lupo 3L.
Anyway i was going away from buy LUPO 3L. If there is possible transform AT gearbox (don't know yet) to classic manual gearbox is the chance got Lupo 3L.
What i can tell you guys, beware of gearbox