Airbag light stays on for 2 minutes after new battery

I recently replaced a dead battery in my '96 A6. Since then, the airbag light stays on after ignition for approximately 2 minutes. Has anyone else seen this phenomenon? If so, what was the remedy/cause?
Did the dealer/shop simply reset the controller with their VAG tool? If not, what was the remedy/cause?
Thanks much, Sadfly
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Dead battery probably drained the power from your reserve airbag power supply. This produce a fault code which can only be reset with a VAG tool. As long as the light is on the airbag will not deploy.
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