I have a Seicento 899 & do regular long trips up & down the country in it as I live in the north & my dad lives in the south, a few months ago I did the journey there & back 3 times within a fortnight clocking up 1,500 miles & went to Festival Italia in between as well, also driving without airbags & ABS are fine, my car doesn't have ABS & soon the airbag is coming out as I plan to fit an aftermarket steering wheel that's a bit smaller than the standard wheel, it's just like driving an old car like a classic mini etc which I feel is better as it seems to make you more alert due to not having the tech & gadgets today's cars have & also I prefer them as there's nothing to go wrong so it doesn't concern me not having these luxuries

. The car will be fine just go through the usual bits you would normally check before a long journey such as checking fluids, make sure there's no leaks from the driveshaft boots, lights working etc & just make sure everything on the car is happy. What I've got into the habit of doing since owning my Seicento is carrying basic spares in the car along with a basic took kit, so in the car I carry
1) spare throttle cable
2) spare clutch cable
3) spare clutch quadrant
4) spare spark plugs, HT leads etc (my old ones as I recently serviced the car)
5) spare crank sensor
6) basic took kit such as sockets, spanners, bit & torq set, pliers etc
A lot of it comes down to maintenance etc & I was always told if you look after your car it'll look after you, apart from one car I've owned that saying has always been true & paid off.