[Radio Code from serial number]

Hello all

 

I don’t have my radio code and it’s gone into safe mode (new battery).

 

We've taken the stereo out ourselves and found the serial number.

 

It's GM040023211228.

 

Does anyone know the radio code for that, please?

 

It’s a Philips CAR 400

 

Vauxhall Astra Mark 4.

 

Many thanks in advance.

 

J