My 1991 Jetta's sterio won't play tapes or radio anymore. The screen has the word SAFe displayed. I wonder if that is some kind of clue.. How can I get my sterio to function again?

Now you must turn ON the radio, and let it turned ON for at least one hour. Then the radio will say only "SAFE".

IMPORTANT NOTE:
You must have the security anti-theft code for your Volkswagen radio from the car manufacturer, or from a Volkswagen dealer!

You can find the radio code at: http://www.radio-code.co.uk/

The sequence of programming for a 2004 VW Jetta radio is:
1. Push simultaneous "SCAN" and "RDS" keys until on the screen will appear "1000" displayed.
2. Release keys. No more push on "SCAN" and "RDS" keys because otherwise number "1000" will be considered as first safe code attempt.
For example: we have the security code "5079". Then:
3. By the no.# 1 key you will set up the first safe code digit. Push 5 times on the no.# 1 button. The "5" number will be setted.
4. By the no.# 2 key you will set up the second safe code digit. Push 10 times on the no.# 2 button. The "0" number will be setted.
5. By the no.# 3 key you will set up the third safe code digit. Push 7 times on the no.# 3 button. The "7" number will be setted.
6. By the no.# 4 key you will set up the four-th safe code digit. Push 9 times on the no.# 4 button. The "9" number will be setted.
7. Then push again simultaneous "SCAN" and "RDS" keys for confirm this safe code. On the screen will be displayed "SAFE" notice. Release keys! For few seconds a radio frequence will be displayed. The radio is now ready for use!

IMPORTANT NOTE:
You must have the security anti-theft code for your VW radio from the car manufacturer, or from a VW dealer!

Or you can find the radio code at: http://www.radio-code.co.uk/

The sequence of programming for 1994 VW Jetta radio is:
1. Push simultaneous "SCAN" and "RDS" keys until on the screen will appear "1000" displayed.
2. Release keys. No more push on "SCAN" and "RDS" keys because otherwise number "1000" will be considered as first safe code attempt.
For example: we have the security code "5079". Then:
3. By the no.# 1 key you will set up the first safe code digit. Push 5 times on the no.# 1 button. The "5" number will be setted.
4. By the no.# 2 key you will set up the second safe code digit. Push 10 times on the no.# 2 button. The "0" number will be setted.
5. By the no.# 3 key you will set up the third safe code digit. Push 7 times on the no.# 3 button. The "7" number will be setted.
6. By the no.# 4 key you will set up the four-th safe code digit. Push 9 times on the no.# 4 button. The "9" number will be setted.
7. Then push again simultaneous "SCAN" and "RDS" keys for confirm this safe code. On the screen will be displayed "SAFE" notice. Release keys! For few seconds a radio frequence will be displayed. The radio is now ready for use!

IMPORTANT NOTE: You must have the security anti-theft code for your VW radio from the car manufacturer, or from a VW dealer!

You can find the radio code at: http://www.radio-code.co.uk/

The sequence of programming for 2001 Volkswagen Jetta 1.9 TDI radio is:
1. Push simultaneous "SCAN" and "RDS" keys until on the screen will appear "1000" displayed.
2. Release keys. No more push on "SCAN" and "RDS" keys because otherwise number "1000" will be considered as first safe code attempt.
For example: we have the security code "5079". Then:
3. By the no.# 1 key you will set up the first safe code digit. Push 5 times on the no.# 1 button. The "5" number will be setted.
4. By the no.# 2 key you will set up the second safe code digit. Push 10 times on the no.# 2 button. The "0" number will be setted.
5. By the no.# 3 key you will set up the third safe code digit. Push 7 times on the no.# 3 button. The "7" number will be setted.
6. By the no.# 4 key you will set up the four-th safe code digit. Push 9 times on the no.# 4 button. The "9" number will be setted.
7. Then push again simultaneous "SCAN" and "RDS" keys for confirm this safe code. On the screen will be displayed "SAFE" notice. Release keys! For few seconds a radio frequence will be displayed. The radio is now ready for use!

Please do rate my response. Thanks!

IMPORTANT NOTE: You must have the security anti-theft code for yours radio from the car manufacturer! The sequence of programming is:
1. Push simultaneous "SCAN" and "RDS" keys until on the screen will appear "1000" displayed.
2. Release keys. No more push on "SCAN" and "RDS" keys because otherwise number "1000" will be considered as first safe code attempt.
3. By the #1 key you will set up the first safe code digit.
4. By the #2 key you will set up the second safe code digit.
5. By the #3 key you will set up the third safe code digit.
6. By the #4 key you will set up the four-th safe code digit.
7. Then push again simultaneous "SCAN" and "RDS" keys for confirm this safe code. On the screen will be displayed "SAFE" notice. Release keys! For few seconds a radio frequence will be displayed. The radio is now ready for use!

IMPORTANT NOTE: You must have the security anti-theft code for yours Audi Concert radio from the car manufacturer! For Audi Concert the sequence of programming is:
1. Push simultaneous "SCAN" and "RDS" keys until on the screen will appear "1000" displayed.
2. Release keys. No more push on "SCAN" and "RDS" keys because otherwise number "1000" will be considered as first safe code attempt.
3. By the #1 key you will set up the first safe code digit.
4. By the #2 key you will set up the second safe code digit.
5. By the #3 key you will set up the third safe code digit.
6. By the #4 key you will set up the four-th safe code digit.
7. Then push again simultaneous "SCAN" and "RDS" keys for confirm this safe code. On the screen will be displayed "SAFE" notice. Release keys! For few seconds a radio frequence will be displayed. The radio is now ready for use!

IMPORTANT NOTE: You must have the security anti-theft code for your VW radio from the car manufacturer! For VW radio the sequence of programming is:
1. Push simultaneous "SCAN" and "RDS" keys until on the screen will appear "1000" displayed.
2. Release keys. No more push on "SCAN" and "RDS" keys because otherwise number "1000" will be considered as first safe code attempt.
3. By the #1 key you will set up the first safe code digit.
4. By the #2 key you will set up the second safe code digit.
5. By the #3 key you will set up the third safe code digit.
6. By the #4 key you will set up the four-th safe code digit.
7. Then push again simultaneous "SCAN" and "RDS" keys for confirm this safe code. On the screen will be displayed "SAFE" notice. Release keys! For few seconds a radio frequence will be displayed. The radio is now ready for use!

Send the request via email through this site these guys can help or go back to dealer and get them to get it for you.
http://autoforum.classifieds1000.com/Volkswagen-Quantum/2007_VW_golf_radio_code
Below is procedure once you have the code:

* Turn on radio -- the word "SAFE" will be displayed.

* First press the MODE button and then press the SCAN button and hold them down simultaneously until "1000" appears in the frequency display. Release the buttons. Do not, under any circumstance, continue holding the buttons down or press them once again. This would cause the radio to take the number "1000" as the code number.

* Using the first four radio station buttons, enter the code number found on your Radio Card. Use button 1 to set the first digit of the four digit code, button 2 to set the second digit, etc. The first digit of a four digit code must be "1". If your code number has three digits, the first digit on display must be set blank.

* Once the code is shown on the display, press and hold the MODE button and SCAN button simultaneously until the word "SAFE" appears in the frequency display. Release the buttons. A radio station frequency will automatically be displayed. The radio will now play once again.

If, when cancelling the electronic lock-up, a wrong code number is entered by mistake, the word "SAFE" will appear in the frequency display first blinking, and then continuous.

You can now repeat the entire cancelling procedure but only once. The number of attempts will be shown in display.

If the wrong code number should be entered again, your radio will be locked up for approximately one hour. The radio will not play. Leave the radio switched on. After an hour, you can cancel the electronic lock-up as previously described.

This cycle, two attemps - one hour lock-up continues again. //

I would suggest that you unplug your battery cables to reset the stereo.

What year and model. The radio is locked out. If the radio is written safe get a battery charger on it turn the radio on (preferrably key on and handbrake to shut off the lights) to make sure the radio doesn't shut off. Next leave it on about an hour or an hour and a half or until the display changes to 4 digits. Enter the code then and follow your manual nad the radio will be ok. You just need that 4 digit code. If you don't have it you need to pull the radio out and get the serial number and your vin to get it from VW.

bad ground or bad power source behind radio and radios sometimes has fuse to the back of radio
something might have surged the cars electrics

some vehicles come with 3 fuses for radios sometimes more
these fuses are listed as
fuse box
power wire fuse box this will be located on the power wire to radio
and then you have the radio fuse

some radios have what they call an antitheft shutdown if the code was not properly put in after so many times the radio completly shuts off or for a length of time it will also shut down the radio

recommendation take vehicle to dealer so they can show and reapply code for you to you then you would never forget how to do it