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When you unhook your battery cables, it clears your "code" on your radio. It will have to be reset before the radio will work. I copied and pasted the below info for you....On mine, I enter my code using the number buttons for your preset station then push mode button. When the radio goes to "CODE" you need to enter the correct code. This can usually be obtained from a dealer, even if the radio has been switched; otherwise you need to return it to Becker. I don't believe there's a "reset" function like on the newer radios. It either goes to "CODE" or works. If you enter the wrong code more than three time the radio will lock up and needs to be left on for as long as twenty four hours, before CODE will come up again. The dealer if they are decent can supply Mercedes radio codes with the VIN or the radios serial number. Becker will do the same but will Charge you $30.00. Perfect Market offers this service for free. perfectmarket@surfpower.net When you unhook your battery cables, it clears your "code" on your radio. It will have to be reset before the radio will work. I copied and pasted the below info for you....On mine, I enter my code using the number buttons for your preset station then push mode button. When the radio goes to "CODE" you need to enter the correct code. This can usually be obtained from a dealer, even if the radio has been switched; otherwise you need to return it to Becker. I don't believe there's a "reset" function like on the newer radios. It either goes to "CODE" or works. If you enter the wrong code more than three time the radio will lock up and needs to be left on for as long as twenty four hours, before CODE will come up again. The dealer if they are decent can supply Mercedes radio codes with the VIN or the radios serial number. Becker will do the same but will Charge you $30.00. Perfect Market offers this service for free. perfectmarket@surfpower.net When you unhook your battery cables, it clears your "code" on your radio. It will have to be reset before the radio will work. I copied and pasted the below info for you....On mine, I enter my code using the number buttons for your preset station then push mode button. When the radio goes to "CODE" you need to enter the correct code. This can usually be obtained from a dealer, even if the radio has been switched; otherwise you need to return it to Becker. I don't believe there's a "reset" function like on the newer radios. It either goes to "CODE" or works. If you enter the wrong code more than three time the radio will lock up and needs to be left on for as long as twenty four hours, before CODE will come up again. The dealer if they are decent can supply Mercedes radio codes with the VIN or the radios serial number. Becker will do the same but will Charge you $30.00. Perfect Market offers this service for free. perfectmarket@surfpower.net

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