by Brian Byrne. Mercedes-Benz has made its NECK-PRO crash-responsive head restraints standard in the C-Class, CLK-Class, CLS-Class and E-Class.
The NECK-PRO head restraints are linked to an electronic control unit: if the sensor system detects a rear-end collision of a predefined degree of severity, it releases pre-tensioned springs inside the head restraints, causing it to move forward 40 millimetres and upwards by 30 millimetres.
This happens in a split-second and has the effect of providing support for the heads of front seat occupants during the early stages of an accident.
Following the deployment of NECK-PRO, the head restraints can be released and re-set using a special tool provided with the car. The internal mechanism can then be pushed back manually to re-set the NECK-PRO head restraints. This ‘reusable’ dimension means there will not be a repair or replacement cost in the unfortunate event of an accident.