Hercules said:
Need to get some leather seats repaired... some wear and tear on it and it's easier for me to drop it off and have them fix it up. On a BMW M3, black seats.
Or so you think I can do it myself in a weekend? I am wanting to try the Leatherique route but.. dunno

If you think I should, can I just buy the 'black' and will that work, or what will I need to do?
Thanks for the advice!
Ok, My story - Went the leatherique route initially on my 5 series.
I removed rear seat, extracted a sample of leather and sent to leatherique, they match send me custom mixed dye. I prep and redye front seats. Not good at all. Color/Gloss seems not quite right and noticeable difference from new dyed front seats and untouched rear seats that do not require redyeing.
Was never happy for 6 Months. Found a guy, Leather-Medic Specializes in autos. Bring car to him, Pick Car up 2 hrs later. Dead on match and flat-gloss leather look.
So, I talk to him - How the hell did you get it dead on? Well, he custom matches on-site in the appropiate light - He sprays on the dye, and rubs as necessary.
Nothing against leatherique, I am sure it was me, You are not to shake the leatherique dye, I shook it prior to applying, probably did not prep as completely as I should of, and I brushed the dye on probably too thick. Hey, I tried to be meticulous, but alas, a stonecold newbie at leather restoration.
Bottomline, after I have it done professionally, My wife comes out and looks at the interior and states - So you had it done right, finally :doh
All in all, my take is that this is more of an art form than anything else, thus in IMHO I would go with an experienced professional who specializes in auto interiors, My guy worked several bimmer dealerships - When I asked him to characterize BMW leather interiors, he said they were finicky. You might check with a local BMW dealer in your area and see who they use.
Anyway, Goodluck!