The way that this fix works is by creating resistance at the door lock pin.
Mercedes a class door lock bounce.
Door lock assemblies and parts door panel parts interior door handles and trim window regulators and parts.
Take your mercedes benz for a test drive.
Ensure the door pin can go up and down.
This prevents the door lock pin from bouncing up and down when you lock the door or when the doors lock automatically.
Mercedes benz c e clk w203 w209 w211.