I wouldn't drive the car until you have removed the pins, pads and the trapped anti-squeal spring plate. The latter holds the pins and therefore the pads in place. Can only suggest it was mis-seated when pads were last changed.

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If damaged the part you will need to replace is (5) in above diagram, one for each pad pin, and part number MBS1890. I would check pads and pins as well.


Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone