You must remove the power going to the radio for 5 mins, you can do this by removing the fuse in the fuse panel for 5 mins, put fuse back in, then enter code - if that doesn't work then you have to remove the negative battery cable for 5 mins, then reconnect neg cable back to battery, then enter code - the key to it is removing power to the radio - the last resort is to remove radio from the dash and unpluging the elec connector from back of radio for 5 mins - the factory "code" should be on a sticker stuck to the radio, you should be able to find it when you remove the radio from the dash.
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When you get a message that says "wait" it is because the wrong code was entered incorrectly. Each time the word "wait" appears the wait is a little longer. The radio must be on during this "wait" time. When it goes away then enter the code correctly and you will have no problems.
You have to have the radio on (even though it just says "wait") with the car running for 10 minutes and you get 3 attempts to enter the code. After 3 failures you have to wait 1 hour for an additional 3 tries at the code. To many code entry failures and it will go into PUK lock and you will have to call the manufacture to have them tell you how to unlock it.
If the code is entered incorrectly 3 times then you have to wait an hour, with the radio turned on, you will then get 1 chance to enter the correct code. Get it wrong and you have to wait another hour before you can try again. Check with the dealership that you have the correct code. They will be able to tell you if you give them the VIN.
AR82.60-P-7502-01A Coding Radio (MODEL all with CODE (750) Radio Becker Europa 2000 with CODE (751) Radio Becker Grand Prix 2000 with RDS)
If the radio is disconnected from the power supply, it is not operational when re-connected. After switching on the ignition and the radio, the readout CODE appears in the display.
The code number for the radio is advised to you on the enclosed CODE CARD.
To enter the first digit of the code number, you have to continue pressing station button 1 until the correct digit appears in the display. Adopt the same procedure for the second, third and fourth digits.
Once you have entered the correct code number with the station buttons 1, 2, 3, 4 and confirmed the entry with the SEEK button (press down), the readout CODE disappears. The radio can now be operated.
If you enter a wrong code three times, you must wait 15 minutes before making a new entry. In addition, if 9 incorrect entries are made, the radio will then not operate for 24 hours. During this time the radio and the ignition (terminal 15) must remain switched on.
AR82.60-P-7502-01B Coding Radio (MODEL all with CODE (353) Audio 30 APS with CODE (510a) Radio MB Exquisit with traffic news decoder, with RDS (Becker) with CODE (512a) Radio MB Special with traffic news decoder, with RDS.)
If the radio is disconnected from the power supply, it cannot be operated by simply reconnecting. After switching on the ignition and the radio the word "CODE" appears in the display on the radio.
The code number for the radio is given on the enclosed CODE CARD.
Enter the code number with the station button, e.g. number 1, station button 1. After entering the first number the word "CODE" disappears and the number entered appears followed by 4 dashes. The next character to be entered flashes. After entering all five numbers, the first character starts flashing again. In this state the code number can be written over as frequently as desired. A correction can be made only by entering the complete code number again.
Confirm code number: Press TUNE, AUTO/SEEK or SC button. The radio automatically switches on and indicates the radio station or frequency stored with station button 1.
If an incorrect code number is entered and confirmed, the word "CODE" appears again on the display. If an incorrect code is entered three times the word "WAIT" appears on the display and the radio locks up for approx. 10 min. If the code is entered incorrectly three times again the radio locks up again for 10 min. Three more incorrect entries (a total of 9 incorrect attempts) increase the lock-up time to 60 min. Another three incorrect entries lock up the radio for another 60 min. The waiting time runs only when the radio is switched on.
if you pull radio out write down serial # off radio. once you got # call dealer and they shold be able to give you radio #. if they don't I could get it for you. I work at an independent shop in MA and we work on merc bmw porsche land rover volvo . My e-mail is firstname.lastname@example.org