no, never noticed this one (having a "C4" with 5 doors too).
The shelf itself is well fixed in my car- no rattling
Have a look at / compare the fixture on an some other C4s-
perhaps there is something different at your car?
I'd show it to my dealer- letting him FIX this annoyance
The only 'rattling' noise I know on my C4, and on really
heavy roads only, is made by the foldable plastic baggage
fixture below... Oh, well there is more: after 2.400 km (!)
the turbo charger of my C4s HDI will be changed
tomorrow- it made some trouble and produced
disturbing noises too... :(
: Have any other C4 owners having problems with a rattle
from the rear shelf
: on a 5 door model ?
: It appears that the shelf is not held in place by the
rubber mounts on the
: rear hatch and so enable it to bounce up and down on rough
roads. It not
: helped by the fact that the shelf is of hard material
against the plastic