The results show the ForTwo scores four of five stars for driver protection in a frontal impact, but only three stars for the passenger. Worse, the rating is based on a collision with a similarly-sized car - a near impossibility, statistically, on American roads. The results would almost certainly be much worse against a larger vehicle, reports CNN.
Not that three stars is particularly good, even against another Smart - the rating equates to a 21 to 35 percent chance of serious injury.
Side-impact ratings are a perfect five stars, however, despite the door popping open during the test. Getting thrown from the car is a dangerous proposition, but the ForTwo protects the occupants well up to that point.
Roll-over resistance scores a mere three stars again, likely thanks to its short, narrow wheelbase and high center of gravity. The three-star rating puts it in the company of SUVs and tall trucks and indicates a 21 percent likelihood of tipping in a crash - not exactly confidence inspiring.