How do you unlock car radio Philips car 400 from safe?

To unlock a Philips Car 400 radio from safe mode, you typically need to enter the correct security code. This code is usually provided in the owner's manual or can be obtained from the car dealership or manufacturer if you don’t have it. Once you have the code, turn on the radio and input the code using the preset buttons. If entered correctly, the radio should unlock and return to normal operation.