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Old 04-30-2003, 09:08 PM
Registered User
Join Date: Feb 2003
Location: Reedsburg, WI
Posts: 22
Unhappy W124 - Did I kill my radio (Becker)?


I replaced the blower on my 87 300D today, and after removing the battery ground while working... my radio is hissing.... no controls, though. Just a dashed line on the display.

Did I kill it?

It was going soon anyway, so it's not a big deal, but if there is a fix, I'd sure like to know about it.


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Old 04-30-2003, 11:10 PM
Registered User
Join Date: May 1999
Location: Sacramento, CA
Posts: 1,478
No, when you disconnect the battery, the radio goes into a "code" mode. Sort of an anti-theft thing. The car should have come with a card with the radio code on it, or contact your dealer, and they should be able to get it for you.

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Old 05-01-2003, 04:17 AM
La Jolla Audio
Join Date: Dec 2001
Location: San Diego California
Posts: 996
Go to the daeler and they can reset it for you. They pull the faceplate off and there is a reset tool that plugs in and wil reset it. There is no code in your radio.
The Mercedes Specialists Since 1986
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Old 05-01-2003, 03:24 PM
Registered User
Join Date: May 1999
Location: Sacramento, CA
Posts: 1,478
Oops, my bad. Scott's right. I shoulda known, I used to have one of those in mine too!

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Old 05-03-2003, 11:39 AM
Cleeve's Avatar
Registered User
Join Date: Apr 2002
Location: Lakeside, Ca.
Posts: 350
Dashed Lines

Hi kolbdo,
Let me add one more thing to all that has been said. If your battery was disconnected on your car and the radio went into the security mode (----) then yes going to the dealership is what you will need to do HOWEVER your radio should NOT go into the security mode when the battery is disconnected UNLESS the INTERNAL BATTERY of the radio itself is bad. You see the radio has an internal battery that holds the security memory so that when the car is being service it won't lose the memory and thus when the cars battery is reconnected the radio will continue to work. The dealership can reset a radio that goes into the security mode like yours but you will be back to them each time your cars battery is disconnected until you have your radio service for a new battery internally.

Cleeve Morrison
La Jolla Audio Repair
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