Hi,
Not sure if this would help - but I had the same annoying problem with my Stagea - got it reset a couple of times and then tried resetting it myself (after reading this forum) with occasional success.
Even called Chris regarding costs for new seats.
Anyhow - took it to Victoria Park Auto Care in Perth and he said something about he cut the yellow plug out from under the seat and bypassed it so it was hardwired (?), said its a common circuit problem with a number of car such as Falcons and BMWs.
It cost us $200 to repair and light had not come back on!