Finally, i got it right, i have smoothing group clean from Cinema 4D to Unreal Engine, Guys you just need to change this option in Unreal when you import your mesh or directly in your Build setting of your static mesh here is a screen shot :
In your Build setting Uncheck : Recompute Normals, and Recompute Tangents you can even see it your Normal viewer it will be the one with green lines instead of divided line this is in your static mesh editor really important,
this is some screen shots: the red square box is the one that you need to uncheck it work 100 %
Here is some quick render of a Car Model i am doing in Cinema 4D to Unreal, you can see that i don’t have any problem in the smoothing group of the model, i hope that help everyone
Enjoy