My family has a 95 850 base model wagon - 98,000 and going strong. We want to keep the car on the road for a lot longer as the body is in preety good shape ( no rust; a few dings) and the engine still drives like new. Ther are some nagging problems we could use some help with:

1) The damn interior panel on the rear lift gate keeps popping its fittings. We have reinstalled it twice, and within a few weeks/months the thing is loose again. Is there a permanent fix to this?

2) The rubber gaskets at both the rear hatch and the rear passenger door have come unglued. What is the best way to repair, i.e. is there a particular adhesive to use, do I need to prep the area, and if so how?

3)The car could use some more power - are there any cost effective mods, i.e. intake / exhaust upgrades or other upgrades that work and make sense for an engine with this many miles?

4) Any recommendations to improve handling? swaybars, struts, springs? Who makes the best stuff. Where is the best place to buy upgrade products and replacement parts.

5) Where can I get a 3rd seat ( our family has grown)? Are they difficult to install?

Any help is greatly appreciated.