Mercedes-Benz GLC : Seats / Head restraints

Adjusting the 4-way lumbar support

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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 2016-2025 Owners Manual: Seat belt adjustment function. Activating/deactivating seat belt adjustment via the multimedia system. Releasing seat belts

Seat belt adjustment function Vehicles with PRE-SAFE®: After a front seat belt has been fastened, the automatic seat belt adjustment may apply a certain tightening force. Do not hold the seat belt tightly while it is adjusting. You can activate and deactivate the seat belt adjustment function using the multimedia system...

Mercedes-Benz GLC 2016-2025 Owners Manual: Problems with the SmartKey, troubleshooting

You can no longer lock or unlock the vehicle Possible causes: The SmartKey battery is weak or discharged. The SmartKey is faulty.   Check the battery using the indicator lamp. Replace the SmartKey battery, if necessary. Use the emergency key to lock or unlock...