Join Date: May 2012
Location: United Kingdom
Going to bump this thread as I finally got round to sorting this issue out and thought you guys may want to know the answer....
The larger part of the rear seat has 2 latches - one is the visible one on the top and the other is a sprung, cable operated shoot bolt that engages to a hole in the bottom center bracket. This locks the seat in place while it is in the upright position. The cable for this runs through the seat: it routes along the bottom and up the side where the release lever is.
To access it, you need to remove the boot carpet completely (prise out the 5 black stoppers on the seat backs), flip up the rear seat bases and unbolt the seat backs (6 hex bolts, or 5 hex bolts and a nut in my case), taking care to remove the torx bolt that holds both parts of the lower center bracket together (T-040) and unbolting the center seat belt from the floor.
Once you have the large seat back on the floor, looking at the back of the seat, remove all the black trim clips and the luggage hooks (T-020) so that you expose the metal seat back. Remove the seat bracket that is on the same side as the release lever. You can then gently (with 2 very small flat blades) prise the upholstery out of the little channel that it sits in. You'll see metal points at intervals that trap the edge of the trim in.
The plastic trim around the release can be removed, you'll need to fiddle a longish flatblade in through the white plastic mechanism to release the clip which is towards the front of the seat.
once you've folded back the upholstery, you can gently prise back the foam and you can see the cable (looks like a bike brake cable. Having done all this you should be able to see what the problem is and can either repair, refit or replace as necessary. On mine, the cable had jumped out of the cable retainer, so I just needed to pop it back in and lubricate the cables and pivots.
Refitting, as they say, is the same in reverse!