We are considering selling a 2003 S600, but have no experience with Mercedes used marketplace. The car is in Palm Springs, CA. We'd like best value for it, so we'd rather not just sell it to a dealer. We'd appreciate any suggestions or comments on whether there is demand for this model and the best way to go about this.

 

A good place to sell it would be on Craig's List as it gets a good amount of traffic and you can't beat the price.

Go here and select the closest City to you on the right side of the page, Once you get there, Select "cars & trucks", then select Post in the upper right corner.
http://losangeles.craigslist.org/

Hope this helps