I have had good luck with Mothers Carpet and Upholstery Cleaner... mostly for grease on the seats from BAD tech at the dealers shop. Amazon.com: Mothers 05424 Carpet & Upholstery Cleaner - 24 oz: Automotivel accidentally spilled coffee on the passenger seat, any recomendation on what to use to clean the spots?
haven't tried it for anything that really stains like coffee.. so you might want to wait for some other people to chip in with more answers.
Found this .. might be helpful
How to Remove Coffee Stains from a Car's Interior | eHow.com
good luck! :sadwavey: