The fantasy "who should the driverless car save?" question is just that, fantasy. We aren't talking about, in practice, complicated moral dilemmas. Anyone who tells you that they're programming that is lying. We're talking about whether cars are programmed to disregard pedestrians, or not. Mercedes says, fuck'em.
And, yes, I always say they won't work so who cares? Well, if "fuck pedestrians" is an acceptable approach, they will be more likely to "work" if you define that as "working." They still won't work as promised, but if you take away the barriers to implementation, by just running them over, they'll work "better" in a sense.
