I have recently bought a 1999 Renault kangoo van with a blaupunkt cassette radio fitted - it has Renault printed on it but no stickers or model numbers or anything (been peeled of by the look of things).
I have the code written on an old service document but can't work out how to enter it - the display shows ---- and the "AF" symbol is flashing.
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Try fixfault.com to fix in-car audio.