The rear bumper on my 220 coupe is sagging on the drivers side

I've had a look from underneath and I think the metal bar has rusted. I want to remove the rear bumper to have a good look.

I have found 2 bolts in the boot which appear to be from the metal bar, does anyone know if there are any more attachments?

Thank you

Lee

on the rear there is one just near the towing eye.

On the front you just need to pull hard once you take the two bolts off.