325i Auto GB Mode Selector Switch Issue

[kombat_kanan]

Hi everyone, need some light regarding my 325i auto GB mode selector switch:My M20B25 E30 has an auto GB; thus equipped with the selector switch Sport-Economy-Winter. The default position is E (economy of course).When the ignition key is at "off" position. The selector switch is working well (of course not moving); means I can switch to Sport mode and the switch will stay in Sport mode.Once I start the engine suddenly the switch will kick back to the default Economy position. When driving nothing's wrong with the GB control system; means I can still enjoy the Sport driving mode only i need to keep holding the switch.Can any sifu here shed some light on this? Perhaps somethings wrong but i cant seem to point out what is.Many thanks in advance :top: