Remove boot lining E240 w210 saloon?

[bobives]

trying to remove section of boot lining that is on bootlid of my E240 W210 saloon. Taken all clips out except large square black assembly in centre? any ideas

 

[gurpz]

If its the the part that holds the top of the warning triangle there is a dip you have to pry with a screw driver towards you and then slide the entire assembly one way. Not much force required.