New for 2005! Meguiar’s Quik Detailer--the fastest way to clean, shine and protect all interior surfaces, Meguiar’s Quik Detailer Interior maintains the look and feel of interior plastic, vinyl, leather, rubber, metal and Audio/Video equipment. The safe, high lubricity formula lifts off dirt, grime, spills, and fingerprints without build up. Nano chemistry offers the maximum UVA/UVB protection which helps prevent fading and cracking.

and for your trim...

Exterior Trim Detailer--shines and protects all non-painted plastic, trim and rubber surfaces with an adjustable spray nozzle to minimize overspray. This fast and easy product provides dark, rich, instant shine without leaving behind an oily residue, and helps protect from fading and cracking leaving behind the natural, original look. In one easy step, Exterior Trim Detailer shines and protects all your panel rock guards, wheel-wall guards, bumper, side mirrors, trim, moldings and more. Even works great on interior plastic surfaces.

It appears that these products pretty much do the same thing. I would try just one or the other.