Grundig — How to Enter Radio Code?
- Hold the AS button while switching the radio on; after the beep, enter the code with buttons 1–4 and hold AS to confirm.
Where can I find the Opel Grundig SC303D serial number?
Enter the last 4 digits of the GM0303 serial number on the radio label.
- Grundig Astra F
- Grundig Vectra A/B
- Grundig Corsa B
- Grundig Omega B
- Grundig Tigra A
Grundig — Frequently Asked Questions
Where can I find the Opel Grundig SC303D serial number?
Enter the last 4 digits of the GM0303 serial number on the radio label.
What happens if the code is entered incorrectly?
Most radios enforce a 15–30 minute wait period (Wait / Safe / Error) after incorrect attempts. Leave the radio switched on with the ignition on until the code entry screen reappears.