The Build Your Own feature for the 2013 GL-Class is now live at MBUSA.com! This will allow you to match your perfect engine with colors, options and packages until you have it just right! The gas versions are still scheduled to be released in September with the diesel to follow in October. There are a few special order options that do not show on the MBUSA.com site. You can see them on my options post from earlier this year.
Order soon if you want something very specific! There vehicles are already in high demand!