In combination with the front and rear deformation zones, the Mercedes-Benz GLK-Class's highstrength passenger cell provides a highly efficient foundation for the occupant protection systems. These include:

Adaptive, two-stage airbags for the driver and front passenger
Kneebag for the driver
Front sidebags and, as an option, sidebags for the rear seats
Windowbags across both seat rows from the A-pillar to the C-pillar
NECK-PRO crash-responsive head restraints for the driver and front passenger
Crash-optimised pedal system
3-point seat belts for all five seats
Belt tensioner and adaptive belt-force limiter for the driver and front passenger, belt tensioner and single-stage belt-force limiter for the outer rear seats
ISOFIX child seat attachments
Belt height adjuster for the driver and front passenger
Belt status indicator for the rear passengers in the instrument cluster

The optionally available PRE-SAFE anticipatory occupant protection system, made available in the compact-SUV market segment for the very first time, sees Mercedes-Benz taking safety to a new, high level in this segment. The highlight of the concept is the networking between the active and passive safety systems. PRE-SAFE uses the sensors of the dynamic handling control systems - for example, Brake Assist (BAS) and ESP - and optimises the protective functions of the passive safety components in potential accident situations. The standard-fit adaptive brake lights, which flash to warn the traffic behind when the brakes are applied abruptly, help to prevent accidents.