Hi, I have been removing all the interior of my 97 boxster to change the rather dull grey into black. Part of this involved removing the seats . I removed the passenger seat without disconnecting the battery terminal and after completing the change of colour i have had no issues with warning lights. I don't know if this is of any use or if the drivers seat with bring any issues?
as long as the ignition is not engaged with the seat out you will be fine
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2006 Audi A4 Avant 2.0t Quattro
1997 Boxster Glacier White w/facelift(gone but not forgotten)
2004 Boxster S 550 Spyder Anniversary Edition