Uncorking a RapideS - how?

[polar8]

The correct fuse to uncork the Rapide S exhaust is in a fuse box which is apparently under the left rear seat. The seat doesn't seem to detach. It can't be a seat and carpet removal to access a fuse box. Or is it?
Has anyone ever accessed this fuse box?

I can't be the only Rapide owner that wants his car to sound as it should!?

Thanks for tips.