Hi,

While not an MB, the radiator of a late model Acura integra has a hairline horizontal crack on the rear side of the plastic top(I believe it is called the 'tank'), It is part of the radiator, and houses all the fins below it, but is plastic itself. My truck has a similar design, as does my 300D, it is plastic and has BEHR on top of it. The piece has a crack, and it oozes out a little coolant constantly when running at operating temp. Causes the level to get low and engine temp to get way up when driving slow.
Reccomendations for what would be best to repair the crack would be most appreciated. I woukld guess some sort of epoxy perhaps? Any reccomendations would great. Thanks very much,

JMH