Date registered: Aug 2008
Vehicle: 2008 E320 Bluetec, 1988 560SL totalled unto death). 1997 Dodge Ram 1500, 1983 300CD
Location: Greater Metropolitan Beaverdam, Virginia
Mentioned: 3 Post(s)
Quoted: 178 Post(s)
As Chris said, it includes anti-corrosion elements, particularly important if your engine includes aluminum parts. It also includes a lubricant for your water pump.
Furthermore, you didn't specify what car you are driving. The choice of anti-freeze is important to most Benz. You should use either the Benz coolant purchased at the dealership or ZEREX G-05, a very similar formulation and acceptable substitute.