The orange triangle is from a Mercedes Benz side view mirror (driver's side as this image had to be reversed if it was taken from a mirror).
https://www.rutherrino.com/the-triangle-knows/2015/12/7/the-triangle-knows
If you recall the United Airlines / USSS Q Post was from a Mercedes Benz as well:
https://8ch.net/qresearch/res/1739324.html#1739490