i have a 2000 s500 and i have a system and there is no air flow whats so ever.im thinking of cutting the back center console but i dont know if there is a gas tank there. can u help let me know thanks

 

just remove the rear stock subwoofer. thats what i'll be doing soon

 

i already did that but i need more air flow...i got 3 12s in sealed box

 

I don't understand what your problem is.

No airflow out of the car thru the boot?

The air exits the cabin into the boot via a grill on the rear parcel shelf. From there it travels behind the boot linings and exits via grilles (hidden behind the boot lining) into the wheel arches/bumper side pieces. These grilles are fitted with rubber one way flaps to prevent air coming into the vehicle via this route. Check the flaps are working OK.

Stuart