Although it does not matter which leads from your multimeter you use to test AC current, when testing DC, it is imperative that you use the positive (red) lead on the positive (+) side and the negative or ground lead (black) on the negative (-) or ground side of DC circuits.lthough it does not matter which leads from your multimeter you use to test AC current, when testing DC, it is imperative that you use the positive (red) lead on the positive (+) side and the negative or ground lead (black) on the negative (-) or ground side of DC circuits.
Always verify your Mercedes-Benz color code on your vehicle before ordering. Obsidian Black Metallic may go by several different names and the color sample shown above for 2015 Mercedes-Benz S-Class is approximate. Show all 17 colors for 2015 Mercedes-Benz S-Class.
The most common color combination is black and brown obsidian swirled together - that's called mahogany obsidian (see photo). As a glass, obsidian is chemically unstable. With the passage of time, some obsidian begins to crystallize. This process does not happen at a uniform rate throughout the rock. Instead it begins at various locations within the rock. At these locations, the crystallization process forms radial clusters of white or gray cristobalite crystals within the obsidian.