yeah it was really weird.
My 99 320 was plug and play. Its still working fine.

the ml..just donest recognize it. When i press CD it still says.
"NO CD changer installed" i would have expected it to at least try to play.

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