"I think it would be surprising if other car makers had a large suite of crash tests they ran that aren't being run by testing agencies, but it's theoretically

"I think it would be surprising if other car makers had a large suite of crash tests they ran that aren't being run by testing agencies, but it's theoretically possible that they do and just didn't include a passenger side small overlap test)." The fact that Mercedes and BMW are in the category "poor without modifications; good with modifications" (i.e. with some modifications, the cars get from "bad" to "good") rather shows to me that these two car manufacturers do have such test facilities where they do such tests to be prepared for the situation when such test become included.