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Discussion Starter #1 (Edited)
dear all,

I have a 1991 190E 2.6L and the radio appears "CODE" after I changed the battery. It's a radio system by ALPINE model CM2190 and I got the 5-digit radio code from MB dealer. But every time I enter the last number there's only a very loud BEEP sound and the word "CODE" doesn't disappear.

Some of the posts say to press on the "*" button, but my radio system doesn't have that button...

I would like to know if there's a specific instruction to follow for the code entering. Please help! if anyone could help me with a step-by-step procedure...

Thanks a lot

Here's how my radio system looks like
 

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