Basically, you remove the cylinder that forms the cubby hole. You then need to cut a small circular piece of wood to go over the screw thread to lock the wheel in place....or you can do what I did and stuff some card in there ;-)

Remove the top plastic sheet (it just unclips from the back near the gas tank) and you'll see you end up with a pretty nice flat surface on which to contruct your sub mounting.

With regards to carpeting... I left my carpet alone, and ontop of the MDF sheet (the sub is mounted from the bottom) I put some heavy duty mesh. The whole grill structure is 18mm (thickness of MDF!) from the sub so theres no worry of the two meeting. The mesh can easily take 200lbs placed on it. The carpet goes over the whole shebang no problem and you'd never know the sub was underneath. Theres no accoustic penalty for having the carpet there at all, as below 200hz, nothing short of a concrete wall is going to do much ;-)

To even up the carpet (you've raised it by about 18mm) you might want to cut up some card or some carpet underlay (great cheap soundproofing!) to raise the carpet on the left side.

On my 300CE noone knows the sub is there until you play it!

If you have *no* porting into the cabin you'll get no sound as the trunk on the W124 is pretty airtight. I suggest try removing 1, then 2 of the rear speakers to determine how big a port you want. Then cut it under the first aid kit. Be warned tho, cutting here is nasty as the metal is *THICK*. What about treating your passengers to some full range sound from the front? I dont know if theres anywhere to make builds behind the front seats? That way they could have great imaging, and you wont have to cut holes in your rear deck!

You wont need porting from the sub 'box' in the wheel well into the cabin. A port that long wont work, and plus you'll introduce all sorts of port 'whooosh' noise, and possibly make the subs response very 'one-note'... not what an audiophile wants! Ported subs are great for 'boom'. A little less goo for music. Try with a simple sealed 'box' design and go from there.

Its New Years Eve tommorow, and I'm taking the day off work to build a sub box for the passengers feet! I'll let you know how I get on.... <grin>

If you have any more questions feel free to ask, lets see if we can get you the sound you want!

Brian

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Brian Drought
1991 300CE
http://www.users.globalnet.co.uk/~drought/
ICQ: 2180069