EDIT; Ooops! I missed the part about being different colors.
For future reference,
I rejuvenated the leather of my dads Touring using a product I found at an autobody supply house. I also found it at an upholstry shop. It is a simple leather dye that I applied with a foam applicator. I found the same product in aerosol as well. The brand name is SEM It is a common and widely used dye in the industry. Just ask! They'll know, they're the pro's. They may be able to tell you if the darker grey will cover the tan.
I used color chips provided by the shop and they mixed a batch while I waited. I only used a pint for the entire car. Looks brand new.
To enhance the color change you can sand the leather with 600 grit to open up the pores. Wipe it down with an alcohol based window cleaner like "Sprayway" or a cleaner that is safe for mirrors. Apply the dye and allow to dry for a couple of days then apply 303 Aerospace Protectant (also found at an apholstry shop or online)
Do NOT use silcone or petroleum based protectants.(Armorall)
Last edited by Spasso; 11-06-2006 at 06:31 PM.
Spasso
530iT, 525 5-speed , 328is.