We have a 17 Fiat 500C and it is around 2300 lbs curb weight. It is a manual transmission, can be towed 4 wheels down without the key in or on. But, if it were me, I would not tow it with a 2014 Viva that has a 2000 lb limit. And don't forget your tongue weight is only 200 lbs of which a high/low adapter counts against the weight.
A Smart Car would be under the limit at around 1800 lbs. Someone in our local club has a Trend and they tow a Wrangler - way over the limit and he wonders why his Trend wanders from left to right; and accident waiting to happen. I always try to stay well under any towing weight limit.