I can picture image of Nazi solders riding in what became VW bug years later. I'm sure you've seen similar images. The problem with singling out VW is that at that time, nearly 100% of industry in Germany was under the Reich.
MB parent company made Messerschmidt fighter aircraft, and BMW made aircraft engines for them. Similar argument can be made to just about every Axis side industries - Japan, Italy. Japanese consortium industries that built Zero fighters that killed thousands at Pearl Harbor, now trace its heritage to Mitsubishi, Fuji/Subaru, Heavy Industries. Toyota providing vehicles, like VW, and Honda with their motorcycles? The heavy industries are now a vital part of Boeing aircraft (e.g., 787) so there's that too.
Fully appreciate your point and none of us should ever forget what had happened, not just in WWII but many times since (e.g., Bosnia) across the world.