Leatherique. You need both the Rejuvenator and the Pristine Clean. There are clear directions on the site. Buy the 16 oz kit special...it's more than enough to do a full leather interior several times, but won't cost an arm and a leg. You'll be buying the 32oz kits after....believe me. Works great on leather furniture, too.

Hint: when they tell you to apply the rejuvenator with your hand they're not kidding. You'll be able to feel when you've applied just enough, and your hands will be softer, too.

Leatherique is perfect for perforated leather seats as it will not leave any residue or any other "gunk" in the perfs.

http://www.leatherique.com/

 

I use the Porsche conditioner on my full-leather 2009 997.2 about every six months. It is a bit more costly, but a bottle will last for about four applications. My thinking that if there is any problems with the dash or other leather while the car is under warranty, I'll have an edge in getting it fixed. No shine and it looks great.