You just don't know about the autonomous technology from Mercedes. Because they don't talk about. They don't produce blog post about every small step they do, like Waymo and the others.

The automotive industry is more like Apple. They don't talk and show off until its done. Like: Never over promise and under deliver.

You must be joking. This is the industry that has annual travelling car shows where every manufacturer displays "concepts" that are never thereafter produced.

In particular the automotive industry has been sued often enough to be careful what they say. I fully expect Tesla to be found at fault for some situation where they officially say the driver is in charge, but the courts decide marketing messages mislead the driver.