All the sellers should know what kind of adapter you need if you tell them that you have an RNS-D when you contact then and mention the car,model year and any optional equipment you have. In addition to the adapter you will also need to remove the factory installed TMC (or at least bridgen the CAN wires there). Check the quick links or search for RNS-D RNS-E and you will find a couple postings.
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