I have a 5 digit code and cannot find the code,

For Mercedes radio codes contact this link and pay a small fee for them to retrieve your code:

Normally a serial no on back of radio try 0000 1234

posted now 14times. lost your operators guide, its all there, every word, to read, buy one, and win.

here it is , again.
De'ja' vu , all over again. (LOL) RTM
RTM read the operators manual, its all there, here is a direct quote.

quote 14
2008 opr.guide.(lost it, huh?) Accord. non satellite Rad

Quotes:
Your vehicle's audio system may disable itself if it is disconnected from electrical power for any reason.
To make it work again, you must enter a specific five-digit code with the preset buttons.
Because there are hundreds of number combinations possible from the five
digits, making the system work without knowing the exact code is nearly impossible.

You should have received a radio code card that lists your audio system's code and serial numbers. {glove box find}
It is best to store this card in a safe place at home. In addition, you should write the audio system's serial number in this owner's manual.

If you lose the card, you must obtain the code number from your dealer.
To do this, you will need the audio system's serial number.

If your vehicle's battery is disconnected or goes dead, or the radio
fuse is removed, the audio system will disable itself. If this happens,
you will see ''ENTER CODE'' in the frequency display (on the screen on models with navigation system) the next time you turn on the system.
Use the preset buttons to enter the five-digit code. The code is on the radio code card included in your owner's manual kit.
When it is entered correctly, the radio will start playing.

If you make a mistake entering the code, do not start over; complete the
five-digit sequence, then enter the correct code. You have 10 tries to enter the correct code.
If you are unsuccessful in 10 attempts, you
must then leave the system on for 1 hour before trying again.

The system will retain your AM and FM presets even if power is disconnected. {only on newer cars'

General information on Honda and DIY:

{the code can be obtained from any Honda dealership (you must give him/her your radio serial number (sticker off radio)"}
or any locksmith with a license from..NASTIF

Honda1 ServiceExpress (Same info as ISIS)

Acura ISIS (Dealer version w/ advanced search)

http://nastf.org/i4a/pages/index.cfm?pageid=3462

THAT CODE NEEDS TO COME FROM THE DEALER ,SORRY

Try this, it worked for my 1998 Sunfire and a 1975 Monte Carlo.
Press & hold the 2 & 3 buttons @ the same time for about 10 seconds; a 2 or 3 digit code will appear, write this # down,press & hold the am/fm button for about 10 seconds: another code will appear, write this # down, then call 1-800-537-5140 and enter 202108 followed by the # key, then enter the #'s that you wrote down from your radio followed by the * key. The call will give you a 3 or 4 digit override code. Write this code # down so you have it if you ever need it again. Enter this # into your radio following the instructions in your owners manual. If you get an override code that starts with 0, you drop the 0 when entering the code into your radio.
If you don't have an owners manual, try this, press & hold the hour button until the first 2 digits of your code come up, then press & hold the minute button until the last 2 digits show. Then press the am/fm button. This should reset your stereo. It did mine.
Hope you find this helpful.... If not go to the provided website below http://www.radio-code.com/

I'm hoping that you are in the states, because I have a free stateside number that you can call. Here are a full set of instructions to get you sorted out:

If it says "OFF" turn the key to ACC for 5 minutes with the radio on, and displaying "OFF". After 5 minutes the radio will turn itself off. Turn the key off then back on again. The radio should now display "CODE". If this doesn't work disconnect the battery for 5 minutes, and repeat the 5 minutes radio on displaying "OFF" with key in ACC until the radio turns itself off. Now that it says "CODE" go to step 2. The radio must display "CODE" to enter unlock code.

2 Find the radio serial number The radio's serial number is on the left side of the case that is inside the dashboard. You will have to remove the fascia that is around the radio carefully to reveal it. In most models you can use a small dental style mirror to see the code without completely removing the radio. If you can't see it this way you will have to take it all the way out. Don't disconnect anything just pull it out far enough to see the numbers. The model number starts with MNxxxxx, this is not the number you need. The serial will be an 8 digit number, no letters. It will be close to the model number however.

3 Now that you have your serial number call Mitsubishi Motors of North America at 1-888-648-7820, M-F 7am - 4pm Pacific time. They will give you your unlock code for free.

4 Now that you have your unlock code you have to enter it into your radio. They should take you through this on the phone, however, here's how:

The 1,2,3,4 preset buttons on your radio toggle up only through the digits 0-9. The 1 preset button is the first digit holder, and so on for the 4 digit code. If you go too far just keep pressing the button, and it will go back to 0, and you can get back to the right number. If your unlock code has a 0 in it you have to press the button once to get to 0. It starts with a dash (-). This doesn't count as the 0. For instance if your unlock code is 0873, you will press preset 1 once, preset 2 9x, preset 3 8x, and preset 4 4x. Once you have the correct number in the diplay press the "CD" button, and it will unlock your radio. If you didn't do it right, it will display "ERR1" before going back to the "CODE" display. Don't mess up more than twice. After the third failed try things get a lot more complicated!

Your vehicle's audio system will disable itself if it is disconnected from electrical power for any reason.
To make it work again, you must enter a specific five-digit code in the preset buttons. Because there are hundreds of number combinations possible from five digits, making the system work without knowing the exact code is nearly impossible.
You should have received a card that lists your audio system code number and serial number. It is best to store this card in a safe place at home. In addition, you should write the audio system's serial number in this owner's manual.

If you should happen to lose the card, you must obtain the code number from your dealer. To do this, you will need the system's serial number.

If your vehicle's battery is disconnected or goes dead, the audio system will disable itself. If this happens, you will see ''CODE'' in the frequency display the next time you
turn on the system. Use the preset buttons to enter the five-digit code.
The code is on the radio code card included in your owner's manual kit. When it is entered correctly, the radio will start playing.

If you make a mistake entering the code, do not start over; complete the five-digit sequence, then enter the correct code. You have ten tries to enter the correct code. If you are unsuccessful in ten attempts, you must then leave the system on for 1 hour before trying again.

If the code card is lost, your dealer can access your code with your radio's serial number. To access the serial number, turn the radio on. It must display ''CODE'', then turn the radio off. Push the preset 1, preset 6, and power buttons at the same time, then quickly release. The serial number will appear in two sets of four digits (information obtained from Owners Manual).

Hope helps (remember to rate this).

Your car’s audio system will disable itself if it is disconnected from electrical power for any reason. To make it work again, you must enter a specific five-digit code in the Preset buttons. Because there are hundreds of number combinations possible from five digits, making the system work without knowing the exact code is nearly impossible.
You should have received a card with your manual(if you have one) that lists your audio system’s code number and serial number. If you don't have the card, you can get the code number from your Honda dealer, but to do this, you will need the system’s serial number. (you can try the following to get the serial number, but I don’t know if it will work. To access the serial number, turn the radio on. It must display ‘‘CODE’’, then turn the radio off. Push the preset 1, preset 6, and power buttons at the same time, then quickly release.)

If your car’s battery is disconnected or goes dead, or the radio fuse is removed, the audio system will disable itself. If this happens, you will see ‘‘Code’’ in the frequency display the next time you turn on the system. Use the Preset buttons to enter the five-digit code. If it is entered correctly, the radio will start playing.
If you make a mistake entering the code, do not start over; complete the five-digit sequence, then enter the correct code. You have 10 tries to enter the correct code. If you are unsuccessful in 10 attempts, you must then leave the system on for 1 hour before trying again.
Hope this is helpful.

sometimes the previous owner might wrote it down on the owners manual but if not then you need to pull the radio out and get the serial number and call the dealer they will give you a code