Earning top ratings from the IIHS’s evaluation, the luxury sedan scored good for front, side, rollover, and rear crash protection, and it also has electronic stability control (another requirement to winning the award). It also passed the roof strength test for rollover protection – it withstood a force equal to 4.87 times the car’s weight. To earn a good rating for the IIHS’s roof strength test, vehicles must have a strength-to-weight ratio of 4 or higher (in comparison, the current federal standard is 1.5 times weight).
