it depends on country and spec. If your tyres are rft then the black shiny section on the left should be empty (it's for a jack and tyre slime). In the middle there is a cutout for your boot cover, it can go underneath diagonally.
My australian 300 also came with a fold-out box, mesh strap divider/retainer, boot protector, breakdown warning triangle and 5 reflective jackets.
I’d favour a boot/floor cover, I do hope you’ve removed for pictures ?
AgreedTotally. I can understand why some people need a spare but in over 20 years of driving I've had 3 flats, one still drivable to be repaired. For the 2 true flats, one of them I wasn't able to get the wheel off without a gas wrench from road service. So in over 20 years I've only had one flat I could fix myself... I'll take my chances with RFT and better boot space 🙂
The plastic crate collapses. I got given the Mercedes Golf Umbrella and Picnic blanket which I also keep in mineSpare wheel, jack, various tools, first aid kit, golfing umbrella, high vis jackets, blanket, wd40 can, ......... etc, all under floor, cant fit the plastic crate under so strapped to back of rear seat.