Hello All, been trying to find a couple of plastic pieces that are inside the trunk/boot area of the car and no matter how deep i look into online parts catalogues, i cant find the part numbers or anywhere to order these. anyone have any idea how i can track them down or happen to have the part numbers handy?

its the two plastic moldings that are sandwiched between the rear lights and the lid. have highlighted them in this picture (not my car):

 

i can not help with the parts numbers but i would ask
MB parts guy at you local MB dealer or send them this picture you posted.