Safe Code Needed For Seat (Leon) Aura Radio Please!?

Hi there. On dealer a mechanics advice, I disconnected the battery in my 2000 model Seat Leon to reset a dash warning light. (Airbag connector had seperated.) Unfortunately it also stopped the radio from working, and the dealer hadn't bothered writing the unlock code in on the detail card in the radio manual.... It's an ex-company car that I bought from my boss, so I know it's full history, but the dealer it was purchased from has now gone. Could anybody help with the Safe/unlock code, please? The VIN number is VSSZZZ1MZ1R001034, the radio's serial number is SEZ2Z6X1299815, and the part number is Aura (Grundig) 1M0 035 186A. Thanks to anyone that can help!