I just bought a perfect 2005 XLR. The only possible problem is the rubber trim around the windows and doors is starting to look dull and drab. Does anybody have any solution ? Like a rubber conditoner etc.
I had the same problem and I've heard it reported from other XLR owners as their cars hit the three to four year mark. For mine, some of the trim (at the bottom of the windows where they meet the top of the door) was hard and shiny and the top window seal and trim behind the quarter windows was heavily oxidized, leaving a dull, hazy appearance. Most conditioners only superficially hide it; you can still see the oxidized rubber through the "gloss." I used a microfiber cloth with just a touch of Windex and scrubbed it it away--mostly through abrasion. --Honestly, the cloth followed by the side of my thumb worked the best to wear through the haze to get to the top layer of good rubber. It takes awhile, but it works.
Once I got the rubber cleaned up, I applied a rubber and tire dressing I like (available from Zaino) then re-apply it twice a year, and my seals and trim always look brand-new. You'll get as many opinions about what to apply as there are people. I avoid Armorall, since it is a PITA to remove from glass and leaves a greasy finish. There are plenty of other good products you can use.
303 Aerospace Protectant, you can get this stuff on line or at West Marine.
Sunblock for your stuff.
This product WILL NOT harm paint, or anything on your car. I you have an old car with black plastic on the exterior it'll make the old plastic look great. I use it on tired paint, nice paint, tires, interiors, even on the fabric on my patio furniture to keep the So Cal sun from fading it.
This product is amazing, especially for the trim you want to use it on. It's everything Armor All should be.
Alcohol and a rag will rejuvenate any rubber. After you scrub the haze off use mothers back to black. It made mine like new and it has lasted. It probably would not be a bad idea to apply back to black every now and then.