Amber light indicates ready for a service, it will turn red which means overdue.
As for the seat problem, the passenger seat will not operate without the driver seat being connected ,so I would check all wiring connections under the driver seat for tightness and also a worn through wire which may be grounding out, this may also affect the mirror operation.
__________________ VELVET BLUE UK INDIVIDUAL , IM THE LAST
UNITED WE STAND DIVIDED WE FALL
I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!