Rear Heat Vent... WHY?!?

[bustedbenz]

I've read enough threads on the rear vent to think I understand two things correctly.

1. By MB design, when the weather outside is 30 degrees and dictates the use of heat... the rear vent, unless closed (mine won't close completely) blows 30 degree air at my passengers.

2. By MB design, when the weather outside is 90 degrees and I am desperately trying to cool myself off before I melt, the rear vent, unless closed (Mine won't close completely) blows 90 degree air at my passengers.

I am about 90% sure those are correctly described functions for that vent, as per MB specs.

I am forced to ask.... WHY did they THINK i would even WANT such a vent in my car?