E93 glove box latches are electronic and open electronically via solenoid when the glove box 'lever' is pulled to open. The lever activates a micro switch for the door release solenoid. The keyed lock is simply a block to prevent the lever from moving and activating the microswitch. The keyless entry function integrates with the solenoid. If the doors are locked, you cannot open the glove box without a key. The owners manual describes its complete operation.
E90/E92 glove boxes are completely mechanical, and will open at any time if the lever is pulled (unless it is key locked)
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