A transparent, Single-Price, and Stress-free buying process. Price does not include Dealer Installed Accessories (Stargard or Finishing touch).Clean CARFAX. Find Your Star at Mercedes-Benz of Portland. A charge for 0.40% Oregon Corporate Activity Tax and 0.5% state sales tax will be added to new vehicle sales. Plus license and title, and $250 title and registration processing fee. Not all sales at MSRP.