There are more switches available from VW than sockets available to install them in the mk5. There's ESP, TPMS, Aux, Usb, Winter mode and maybe some more (parktronic?) while there are just 4 slots in total. The Aux is rectangular in all 4 corners so it can to go in either one of the 2 inner slots. The Usb switch can only be installed in the right slot cause of the rounded corners. Unless you got something else there (Winter mode).