Consider me a disillusioned owner, not very proud. I've owned many Mercedes cars of various vintages and brand recognition was one factor to buy. I waited around 4 years, total, to find the right used Smart in as perfect a condition as possible. I bought a late-2008 coupe, loaded, for $10.5K without a scratch that belonged to a little old lady in a retirement home. Everything was serviced at the overpriced stealer's shop. As man doesn't cause AGW, environment had nothing to do with it. My Mercedes diesels all burn recycled vegoil. I'm not allowed to buy a diesel Smart that gets 80mpg in America.
If nothing happens to it, I'll be fine. There's way too many "faults" reported by owners, shifters, clutches being eaten, at very low mileages. A Mercedes that lasts it's not going to be. I'll be amazed if it makes 60K miles without major problems. A clutch is $600, just for the parts. There's no aftermarket parts competition, one of its major flaws. So, Mercedes parts are cheaper. If it got 500 mpg you'd save money if you hire maintenance and parts from the stealers. At 40mpg, saving money is a fantasy.
It's great fun to drive and always the center of attention as they think it's a "death trap". Death trap is my 2003 Honda Reflex 250cc plastic scooter, not the Smart. Honda has no service issues at 22,000 miles....but not in the rain! I wish my Smart had the Honda's variable belt drive instead of its transmission. At 22,000 miles, the belt is fine!
I'm not brand loyal, as you may have detected. Smart needs to replace the defective polycarbonate sunroof that crazes something awful in any car in the sun. They've told other owners the crazing panel is "normal" and "aging", even though it's only 2 years, a travesty.
I cannot recommend anyone buy a vehicle that's so expensive to fix and maintain. Parts and service eat any savings in fuel many times over.