Hi..
may I ask where you purchased the changer?
about the reprommaing..i have no idea how to do it myself. ON my 99 E320..it was all plug and play. Nothing else needed but to plug it in...

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2001 ML 320 (silver)
1999 E320 (smoke silver)
2002 Acura TL Type S
1994 Honda Civic EX (commuter)