How to enter Test Mode Opel CD400+ (hidden menu Vauxhall Astra Insignia Meriva Zafira)

Opel CD400+ test mode is a hidden menu with diagnostic tests of radio tuner. Access it to check signal strength, software and hardware versions, RDS diagnostic data and much more interesting information that will be helpful while diagnosing issues with car audio system in your Opel or Vauxhall car. CD400+ radio can be found in: Opel/Vauxhall Astra J Opel/Vauxhall Insignia Opel/Vauxhall Meriva B Opel/Vauxhall Zafira C More at http://mr-fix.info/ Music by Dan-O at DanoSongs.com