
Car would weigh 100 kg (220 lbs) less than its predecessor
The 2014 BMW M3 has been spied with camouflage on its roof.
This doesn't sound terribly exciting but it likely means the prototype is equipped with a carbon fiber roof that will reduce weight and lower the car's center of gravity. The roof is just one of several carbon fiber components that are expected to debut on the model and help to it weigh 100 kg (220 lbs) less than its predecessor.