pump some bass up in here

i want still want some extra bass in my car.
however, i dont want to put a couple subs in the trunk and have it rattle.
is it possible to put a sub under each of the rear seats in the 2009 c300?
it would take care of the rattling problem, and i think it would pretty cool to have that. the vibrations will also be good for the ladies sitting in the back

if anyone has ever taken the back seat apart, is that possible, if i remove some foam, etc?
thanks a bunch


