I hope they are going to have a display of gas vans that they used to kill Jews and other inferiors durring WWII, in the interest of historic accuracy of course.
The gas vans were not produced by Mercedes Benz. In fact they were SS-self-made conversions of Deutz (Klöckner-Humbold-Deutz) trucks. There is no direct connection to the German industry in this case.
Of course Mercedes Benz used slave workers in their factories, but they were -to my own knowlege- not involved directly into the Holocaust.