⭐【Unique design for Mercedes-Benz 】General phone holders won't work with the unique circular air vent in a Mercedes-Benz. Our specially designed reverse elastic clip mount guarantees a solid grip on the air vent in a Mercedes-Benz,⭐【Easy In and Out, One Hand Operation】Simply slip your phone into the holder using just one hand and it will automatically lock into place thanks to our gravity locking mechanism, no manual adjustments needed,⭐【Automatic Fixing】Gravity locking mechanism, one hand inserts the phone and automatically clamps, no need manual adjustment. It provides you a safe and convenient driving experience,⭐【Bump-Proof】The gravity mechanism provides stability for your phone. As you drive, the vibration causes the gap between the clip and your phone to decrease, making it increasingly secure. No need to worry about your phone falling out, even on rough roads and sudden stops.,⭐【For Car with Circular Air Vent】 Mercedes-Benz B/C/E/S-Class, GLB/GLC/GLE/GLS-Class AMG, and Mini Cooper with round air vent.