Mercedes-Benz GLC : Seats / Head restraints

Adjusting the 4-way lumbar support

..

Adjusting the front seat head restraints mechanically

WARNING Risk of accident due to adjusting vehicle settings while the vehicle is in motion You could lose control of the vehicle in the following situations in particular: If you adjust the driver's seat, the head restraints, the steering wheel or the mirror while the vehicle is in motion...

Other information:

Mercedes-Benz GLC 2016-2026 Owners Manual: Activating/deactivating the climate control synchronization function via the air conditioning control panel

Climate control can be set centrally using the synchronization function. The temperature and air distribution settings for the driver's side will be adopted automatically for the front passenger side. Press the button. The synchronization function will be deactivated if the settings for one of the other climate control zones are changed...

Mercedes-Benz GLC 2016-2026 Owners Manual: Navigation overview

..