Distributed control platform for a motor vehicle

A processing system for a motor vehicle includes a first and a second control platform; wherein a control platform has a motherboard having a plurality of slots and a switch; an expansion bus that connects the switch to the slots; a first plug-in card having a processing device; and a second plug-in card. The second plug-in cards are connected to each other by way of a connection cable and are configured to couple the expansion buses to each other.