Numerous occupant protection systems can significantly reduce the risk of injury during an accident. Examples include the NECK-PRO head restraint, a standard feature on the front seats: when the sensor detects an impact from the rear, it thrusts the head restraint forward and upward in a matter of milliseconds to reduce the gap between it and the occupant's head.
The C-Class is also equipped with adaptive belt tensioners for the front seats, belt tensioners for the outer rear seats and with numerous airbags, including two-stage driver/front-passenger airbags, front sidebags (rear sidebags are optional), driver kneebag, and windowbags extending across all seat rows. The windowbag protection zone covers virtually the entire area of the side windows.
The sidebags and windowbags are controlled by pressure sensors: if the door deforms due to a side impact, the air pressure between the door panelling and the interior of the door increases. This change is registered by the sensors, which help the control system to trigger the airbags.
Protection also extends to other road users, however, thanks to features such as smooth body surfaces with a generous degree of predefined yield.