Annoying noise

[Toe ball]

Hi All,
My 2021 ST, 87000(+,-) has developed like a rattle that seems to be located behind the passenger front seat. Tough to tell where it is. I’m thinking the retractable sunshade that goes down behind the rear door panel. I’ve put it all the way up and held on to it but no change.
thanks

 

[Toe ball]

Hi All,
My 2021 ST, 87000(+,-) has developed like a rattle that seems to be located behind the passenger front seat. Tough to tell where it is. I’m thinking the retractable sunshade that goes down behind the rear door panel. I’ve put it all the way up and held on to it but no change.
thanks

Any ideas?

 

[MRV568]

Probably coming from underneath the car, the sound deadening panels have plastic clips that have either worked loose or possibly fallen off. I would check there first. It's a common issue.