Well i have the entire trunk of the MKS stripped out and have pictures of the sub setup that a few people have been looking for. Unfortunately the sub is dropped in from up top so I need to pull the rear deck out. Any tips on getting this out? The MKS seats don't fold down so its hard to say how to get this thing out, any tips are appreciated.

On other cars I've owned, the rear deck was removable by following these steps...

1. remove rear seat bottom by pushing it towards the rear. they are a tension fit with a hook on each side. once that hook is cleared, pull it up and forward
2. unbolt the seat back at the bottom. in location that was under the seat bottom
3. lift seat back up and out.  usually hook at the top.
4. that usually exposes attachment points for the rear deck.

Wild card is usually the seat belts.  In one car I had they passed through the rear deck.  Unbolting the belts at the base and feeding back up through the deck was necessary for deck removal.  A T50 bit was necessary for seat belt removal.

I haven't looked at the MKS at all, so I do not know how much if any of that applies.  Once it cools off outside some, I'll go out and take a look if needed.

One sho there were 3 push-in style plastic clips behind the seats.
The rear side interior panels needed to come out first then the clips, then there was some Velcro holding down the rest.

Per the manual, you have to remove the scuff plate trim panel, the C-pillar trim panels, and the rear seat/backrest before you can get to the parcel shelf.

THANKS SHO!!!

At least the seat belts don't have to be disconnected.

Interesting to note that it says to disconnect the rear speaker wire terminal.  That would infer that the speakers are connected and come out with the parcel shelf.

First time I saw that type of speaker installation was on my Oldsmobile Aurora.  The door speakers were connected to the door panel instead of the door itself.

Okay got it all done and removed the sub so I can install a new one from inside the trunk. Here are the steps.

1. Remove the seat bottoms. There are push buttons where the seat meets the floor carpet about mid way up your calf and between your legs, one on each side. Push them in and then push the entire seat back as it is on some metal hooks near where the seat belts come out. Be sure to unplug the wire harness if you have heated seats.

2. After removing the seat bottom, remove two large nuts on the bottom corners of the seat back. From there you can pull the seat back off the posts and push up to unhook it from the rear deck. Be sure to unplug the wire harness if you have rear heated seats.

3. Next remove the trim panels that are on either side of the rear deck. There is a 6mm bolt where it over laps with the trim going down to the kick panel. Otherwise just pull and slide your had behind it to pop out the metal push clips.

4. Remove 3 plastic push in fasteners holding the rear deck cover down to the metal right on the front edge, then lift the deck cover up and out. Be sure to disconnect 1 wire harness that powers two speakers that are attached to this cover.

5. Now you can see the sub, there are 4 6mm screws holding it in, 3 can be accessed and the 4th is under the shade screen "if you have one". This last screw I used pliers to unscrew it from inside the trunk all the way up until it was holding on by the last thread. I then hit it lightly with a small hammer to pop it out since you cant get a wrench or socket on it from inside the car.

Now you will have a nice 10" hole to mount a sub, and i would do it from inside the trunk so you don't have to pull all this crap apart again. Put it all back together in reverse order.

Be sure to seal it up if needed and add some sound deadening to the rear deck. I know it looks reinforced but it WILL vibrate.


Sent from my iPad using Tapatalk

If you mount the sub from below ... And don't want to dismantle the interior to change in future I'd recommend carriage bolts, lock washers and secure the nuts with red Locktite. Glock is right about vibration.... Seal anything that looks open or loose with silicon sealer and wrap the rear deck in a sound deadened of choice (I like Dynamat).  Then test it before reinstalling the interior and rear deck to check for vibration/buzzing at each step.