if you see "SAFE" on the radio on a car400 radio, a number will appear before it, starting from 10, - 10 means the number of times you can enter the correct code before the radio locks. if you enter the wrong code then it will go down to 9, and so on everytime you put in the wrong code, the waiting time doubles, so, starting from 10, if you put the wrong code in you have to wait, 40 mins driving time i think, wrong code again, then 80 mins driving time, then 160 mins etc etc, so every time your driving your car make sure you turn the radio on so it will always say the "safe" cos if you have the radio off, the timer will not count down.... this is a real pain, cos the code i have is a 5 digit number and the radio will only allow me to enter a 4 digit number, and i had 1 attempt left, so now i have to look around for a new car400 radio cos i bought meself a new car radio and when i managed to get the car400 radio out, it was a totally different connection so it is looking like i have to replace the old car400 radio with a new car 400 radio....Hope this helps....
Tony G, December 2010