I've fitted some massage seats from the new S4 into my 2013 S4 and have airbag, occupancy sensor and main electric seat functions but I don't have any lumbar or massage. The "multicontor seat controller" requires a power supply, earth and also has a LIN connection. I've tested for power and earth which are present so I assume that the controller is looking for something on the LIN line. Can anyone think of any way (or anything to try) to get this working? Obviously I don't expect the MMI to display what the seats are doing but it'd be nice to be able to use all the functions.