Most street legal vehicles utilize a combination of three colored lights: white for headlights and reverse lights, red for tail and brake lights, and orange for blinkers....
Mercedes-Benz debuts turquoise exterior lights to indicate the car is self-driving | A visual indicator for other drivers::undefined
Even if this would be a good idea, you can't just put some non regulated lights on a car. This would need a law change in Germany to be approved and would probably take years of burocrazy until she get beards figured out the exact hue these lights need to emit.
But I guess Mercedes already wrote that law for our government to copy. How convenient.
How is this a safety feature though? Are they saying we have to be extra careful around self-driving cars? If so then the car shouldn't be considered to be self-driving. If not, then what's the use?
I see a lot of people in this thread saying a car that needs any kind of indication of self-driving isn't safe enough to be on the road, but that implies a single answer to questions like "is it safe enough?" In reality, different people will answer that question differently and their answer will change over time. I see it as a good thing to try to accommodate people who view self-driving cars as unsafe even when they are street-legal. So it's not really a safety feature from all perspectives, but it is from the perspective of people who want to be extra cautious around those cars.
Personally I see an argument for self-driving cars that aren't as safe as a average human driver. It's basically the same reason you sometimes see cars with warning signs about student drivers: we wouldn't consider student drivers safe enough to drive except that it's a necessary part of producing safe drivers. Self-driving cars are the same, except that instead of individual drivers, its self-driving technology that we expect to improve and eventually become safer than human drivers.
Another way to to look at it is that there are a lot of drivers who are below-average in their driving safety for a variety of reasons, but we still consider them safe enough to drive. Think of people who are tired, emotional, distracted, ill, etc. It would be nice to have the same warning lights for those drivers, but since that's not practical, having them only for self-driving cars is better than nothing.
Different regulations apply for the driver when the car is autonomous vs controlled by a driver.
These lights do not indicate driving assists like Tesla's autopilot but full level 3 and above autonomy. In level 3 for example, Mercedes is responsible for any damages due to accidents - not the driver.
Also in level 3 the driver may legally use their phone, which is illegal for a car driver normally and give them a ticket.
So there IS a legal requirement to find out about the autonomy level of a car from outside.
The point is that innovation should always come with regulations. This is not the wild west over here. We like to be alive and companies usually don't care about that but only care about profits. So it's a good idea that they can't just do whatever they want. If they invent something actually new I'm quite happy that a third party will have a look at it before it's mounted to a vehicle that kills me. I know that in the us this is handled the other way around but I guess the statistics for car accidents agrees with me.
No law change needed, the StZVO is a mere decree. Also EU law takes precedence Mercedes probably isn't even going to bother getting it through German bureaucracy but will go straight to Brussels.
This would not be illegal in the US, except some states forbid blue lights because they're reserved for law enforcement. I haven't seen any state regulation that rigorously defines "blue" like the NHTSA references to CIE 1931.
They would also have to be distinct enough to not cause confusion with the existing lights.