Resetting the NECK-PRO head restraints requires a lot of strength. If you have difficulty resetting the NECK-PRO head restraints, have this work carried out at a qualified specialist workshop, e.g. an authorized Mercedes-Benz Center.

Press the base of the NECK-PRO head restraint cushion back in the direction of arrow 2 as far as it will go.
Push the NECK-PRO head restraint cushion down into the guide in the direction of arrow 3 as far as it will go.
Firmly fold the NECK-PRO head restraint cushion back in the direction of arrow 1 until it engages.
Repeat this procedure for the second NECK-PRO head restraint.