# Indicator Lamp # Functional Check The yellow indicator lamp in the instrument cluster display lights up briefly as a functional check when the ignition is switched on and goes out after a few seconds. # Fault in Airbag or Belt Tensioner System ![](https://sl.haramasu.com/DO6v6) The yellow indicator lamp lights up continuously. In addition, a message may be displayed in the instrument cluster. A malfunction has been detected in at least one airbag or belt tensioner. - Go to a suitably qualified workshop and have the airbag and belt tensioner system checked. Volkswagen recommends ID. UNYX Service Center.