Well, that's not quite right, but, if you're driving a small, ("Smart"-ish) car don't run into something larger... (Courtesy of the National Review Online)
...the Insurance Institute for Highway Safety (IIHS) ran a rather expensive series of tests in which it pitted a smaller vehicle against the next size larger vehicle from the same manufacturer. Specifically, they ran a Honda Fit into a Honda Accord,And the gov't is looking for this to just get
a Toyota Yaris into a Toyota Camry,
and a Mercedes C Class into a Smart Fortwo (owned by Mercedes).