You cant get the mesh off, it is attached to the rear shelf. Taking the rear shelf out is dead easy though.
1.) remove back seats (bottom part just pulls off, back part is held in with 4 bolts and clips in at the top. push upwards to disconnect clips)
2.) remove c-pillar covers (these just pull off)
3.) gently pull shelf upwards (there is one push in clip in the centre)
You should now be able to slide the shelf out of the way to hoover your cones.
have fun!!!!