I couldn't disagree with you more. I don't know what your experience is with those systems, but I invite you to come over and drive my Sprinter that is equipped with Lane Departure, blind spot, front and rear proximity sensors, etc. At first, it is a little intrusive and I will admit that I hated it and may have even posted about how much I disliked those systems. Now that I have some miles under my belt with it, I have changed my opinion and they are some of my favorite parts of that vehicle. I especially appreciate the blind spot monitoring while on the highway.
Maybe the Mercedes system is just refined beyond the common annoyances with those types of options. But I can't see buying another vehicle without those things now that I am used to them.