American safety regulators don't have rules determining how brake lights should work while regenerative braking is happening, leading to potential safety issues
Concept cars, by definition, tend to be pretty rad. But some are radder than others; namely, the ones designed to do more than just look good. The Mercedes-Benz C111 is in that elite group of concepts. The tangerine Bruno Sacco-penned wedge was not only otherworldly in its design way back in 1970; it also served as…