See also:

Problems with your vehicle
If you should experience a problem with your vehicle, particularly one that you believe may affect its safe operation, we urge you to contact an authorized Mercedes-Benz Center immediately to ...

Adjusting the head restraints manually
Adjusting the head restraint height The head restraints must only be removed at a qualified specialist workshop. Mercedes-Benz recommends that you use a Mercedes-Benz Center for this purpose. ...

EASY-ENTRY/EXIT feature (third rowof seats)
Important safety notes WARNING   To help avoid personal injury, the second-row seat backrests must be properly locked either in the upright position or, when using the expanded cargo vo ...