If robotaxi fleets run by car companies are the future — as laid out by Tesla (TSLA) CEO Elon Musk — you can count luxury legend Mercedes-Benz out of the mix. "Our job is to take you from A to B in style. We're not a public transportation service or a mobility service provider. We could give you products if you want it, and we can sell you, but we want to give you individually that technology," Mercedes-Benz (MBG.DE) CEO Ola Källenius told me this week on an earnings call with reporters. The German auto giant is focused on improving...