2nd row head rest unsafe and unuseable - the headrest is too low and too high for a child or small person to use. When in down position, seat pushes head forward; when it is up, it's too tall for the head. Also headrest is very difficult to pull up. Basically, this part is not useable by anyone except a very tall person. Should be replaced by Mercedes. Injuries can occur due to this design. No incident has occurred; only complaints about using the head rest.

- Rockville, MD, USA

The second row seat headrest is unusable for my children. It hits them in the head and they are totally uncomfortable. I see now that this is a major source of problems for this vehicle. Many parents are complaining. Mercedes has no cure for it. Not ok.

- Sunnyvale, CA, USA

My father and mother in-law recently purchased a 2016 Mercedes Benz GL450 as our family car. The headrests for the 2nd row seats with the "easy entry" option appear to pose a comfort and safety issue for both car seats and "shorter" people... I would say 5'-3" and shorter. With the "easy entry" option the 2nd row head rests are only 2 position, fully lowered or fully extended. Fully adjustable heights are not possible. Both positions pose a comfort and safety issue. At the fully lowered position, a child's car seat would not be flush with the seat as the head rest forces the car seat to lean forward in an unstable condition. Also for "shorter" people, the head rest at the fully lowered position forces a person's head to lean forward in a very uncomfortable and un-natural position. With the headrests at the fully extended position, the car seat back doesn't quite rest on the the seat as the head rest still protrudes from the vertical plane of the seat. Therefore the car seat is once again in an unstable condition even though secured by the seat belt restraint system. For the "shorter" people, the headrest at the fully extended position is extremely uncomfortable as the headrest protrudes, as indicated above, and so the person's head is resting on an edge of the headrest, in a leaned forward position. Please review this issue further as I'm sure there have been other complaints on what is perceived to be a manufacturer's design issue.

- Carson, CA, USA