I went to buy some Zerex antifreeze only to find out there are several kinds and all are different colors. I opted for the G-05 a gold color liquid recommed for my year of Mercedes. For those of you who want the technical information on the different types of antifreeze here is a link.

http://gates.com/downloads/download_common.cfm?file=MOTORCoolantFeature.pdf&folder=brochure