Sub Woofer not working

[4Rens]

Now I see these comments I realise why I am disappointed with Bose sound in my car. Even the simulated engine noise is very weak. How do you get to the secret menus?

On the 'C' screen, go to the 'System' tab.
Tap 5 X on the 'Entertainment system' line.
In the popup screen, type the code !Mg12345.
You are now in the mechanic menu and can find a lot of information here.
Good luck with that.

 

[Jay Dee]

On the 'C' screen, go to the 'System' tab.
Tap 5 X on the 'Entertainment system' line.
In the popup screen, type the code !Mg12345.
You are now in the mechanic menu and can find a lot of information here.
Good luck with that.

Thanks, will give it a go when wife has brought my car back tonight