XSARA PICASSO DASHBOARD REMOVAL?

MY PICCASO HAS A INTERMITANT RATTLE NOISE AT LOW TEMPRATURES WHEN THE CAR IS ACCELERATING. IT COMES FROM THE TOP OF THE DASHBOARD IN FRONT OF THE STEERING WHEEL. ALL LOOSE ITEMS HAVE BEEN REMOVED FROM THE CAR TO LOCATE THE NOISE. I NEED TO HAVE ACCESS FROM THE TOP HAVING REMOVED THE UNDER COVER OVER THE PEDALS I CANNOT SEE FAR ENOUGH UP. HELP ANYONE