T.W.C.

Hay guys... Please are there anyone who can recommend a perfect roof box for an MB CLS model 2007.

I have seen those;

Thule Motion 800 (205X84X45)
Thule Motion 600 (190X67X42)
Thule Motion 200 (175X86X46)
Thule Touring 100 (139X90X40)

I don't know if Thule Motion boxes will be too long for an MB CLS and there will be a problem while I'm driving, I thinking how long the box can go out in front of the front window. Or I could just choose the Thule Touring model ??