I went with the non-metallic black on my SLK 55. Not so much to save the money but I thought the non-metallic black was deeper looking and looked better than Obsidian. I've had metallic black on previous BMW's and they never looked as "deep" black as non-metallic. I also thought the Obsidian black almost looked dusty even when freshly washed versus the regular black. I had my MB dealer place the two blacks side by side and I just liked the non-metallic black better. However, I'm sure this is different for different folks.
I do know that non-metallic black will be more difficult to take care of however.
BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more!