I don't know of all the control differeces but the CD-R55 is labled for the AVH-P4900DVD and AVIC-D3,
http://www.pioneerelectronics.com/pna/v ... 26,00.html
the CD-R5 is labled for the AVH-P5700DVD and AVIC-N3
http://www.pioneerelectronics.com/pna/v ... 26,00.html
I would think they would both work on the D3 but for $20.00 I just ordered the the cd-r55