I've used Leatherique products on all our vehicles for several years now with only exceptional results (also use it on leather shoes, jackets, wife's purses, etc.). Have tried other products as well, but Leatherique is all I'll use now. (
www.leatherique.com) It will leave your interior smelling like fresh leather. They also sell dye, which they can match to your interior color, if you need to touch up worn areas.
The rejuvenator oil is what you'll need to apply first in order to "float" the dirt and grime out of the pores of the leather, and soften the leather at the same time. Follow this up with the pristine cleaner to remove any remnant grime, and buff to shine. They have instructions on their website -- or simply ask to speak with George (the owner).
I use the pristine cleaner weekly to wipe down the interiors (vinyl, leather, rubber, it doesn't matter). Spray on and wipe off.
BTW, I have no affiliation with them...just a happy customer.