Combined with the front and rear deformation zones, the high-strength occupant cell forms an effective basis for occupant protection systems that include:

adaptive, two-stage airbags for the driver and front passenger
sidebags in the front, and in the middle row of seats as an option
windowbags across all three rows of seats
NECK-PRO crash-responsive head restraints for the driver and front passenger (optionally NECK-PRO luxury head restraints)
3-point seat belts on all seats
belt tensioners and belt-force limiters for driver and front seat passenger
seat belt tensioners and single-stage belt-force limiters in the middle and rear seat rows
ISOFIX child seat anchorages for up to three child restraint systems in the centre seat row
belt height adjustment for the driver and front passenger
belt status display for rear-seat passengers in the instrument cluster
automatic child seat recognition (optional) with deactivation of the front passenger airbag if a special Mercedes-Benz child seat is fitted