Need code for my Mercedes radio as I have fitted new battery

SOURCE: mercedes radio unlock code

go to "beckerelectronics.com/stereo.htm and they should help you

SOURCE: c280 radio code

THE CODE SHOULD BE IN YOU'RE MANUAL. IF NOT GO TO THE DEALER W/ YOUR VIN, ENTER THE CODE AND PUSH SCAN

SOURCE: Radio Code for 1999 Mercedes E430

If you call your merc dealer they should give it to you on the phone, if not have a look at this web site, if not, then if you take out the unit and let me know the s/no: i will see i have it.
http://www.radio-code.co.uk/code-entry-help.php

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SOURCE: Need Radio Code for CLK430 Mercedes Benz

Yes. Every time you disconnect the batterie you need to put radio code again.

SOURCE: Need Radio Code for ML320 Mercedes Benz

The main dealer will supply the code usually for a small charge.
Have a look on line first though because some are offered freely .
You will need the model year and chassis number.