e36 Business CD: Security Code Input help?

[Thud]

This may seem like an idiotic question, but I recently received a used OEM Business CD RDS (CD23; Blaupunkt Model BP3850) from a 1994 e36. It's replacing an older unit which does not use the same type of security, and I DO NOT have a manual. The unit came with a 4-digit security code, but some of the numbers are higher (let's say "9999" for argument's sake) than the face numbers on the preset buttons ("1"-"6"), which leads me to believe that the input method for the code is NOT just pressing the preset buttons, as it is for older units. Or, it's a bogus code (which I tend to doubt since I have the actual Radiopass card).

Can anyone with this unit (or this type of unit) let me know the code input process? I'd really appreciate the help.

 

[johnf]

I thought U.S. radios had a five digit code.

Trying repeatedly pressing button 1 on the radio to change the first digit, then button 2 to change the second digit, and so on. That's how it works on my European BMW Business CD (made by Philips rather than Alpine). Let us know what happens!

 

[andreyiv]

That is exactly how you put it in into the Blaupunkt head unit and the enter key is the key that has > written on it.

 

[Thud]

That makes sense. I'll give it a shot next weekend and let you know. Thanks for the input guys.