Use the 303 for its UV protection. Keeps everything: vinyl, plastic, leather and rubber the original color. Keeps my red leather seats looking very nice and rich. (gotta wear shades!)

Just make sure to buff it off (per the mfgr's instructions) with a clean cotton or microfiber cloth...no shine, no residue.

IWFM

Duffer

 

303 or Klasse Vinyl, Rubber and Plastic Protectant from Germany in the red bottle are great products. I just started using the Klasse two weeks ago on the interior. The seats still feel slick since I put the Klasse on it. The slickness will probably help keep the wrinkles out the leather. I used to just use the 303 on all the interior but now I just use it on the tires. The Klasse is an acrylic based product with UV protection that cleans as well as protects. If you get it on the windows it wipes right off with no smears. It smells like cherries while in the bottle but after you use it on the car and it dries you don't smell it. I got it from Properautocare.com

 

I Just use a microfiber cloth to wipe the interior down because I want to keep the flat look as well and I think all the "protection" products attract dust.