DD3515 with carbon fibre dust cap dual 2ohm

i have purchase a DD3515 with carbon fibre dust cap dual 2ohm from a friend,can some one please let me know the full speaker parameters as i cant seem to find for dual 2 ohm version.also can any one tell me its rms have seen roughly 1200 rms .need to no how much is speaker displacement for one of these drivers,also i have about 40.5 inches width 14 inches deph 16 inches height external 1inch all round 2 inch baffle roughly 4.45cft with out speaker displacement. not sure on what the best tuning for dd3515.i want to be as loud as db possible and low damm low i want to be playing music 140 db plus do you guys think thats possible? all help thanked in advance. its for a mercedes ml,also can any one tell what motor is fitted from pics?

 

found 3 stickers hope this helps.
11-2004 i know this one build date
DD35K 2/2 not sure about this i no its dual 2ohm dont know what k means
11445 dont know what it means