I have a CR-210 (not CDR) in my 96 C2, and wanted to move away from an old FM dongle that plugged into the cigarette adapter. After much research in the threads here I selected the iSimple TranzitBLU, model # iSFM22 (see http://www.discountcarstereo.com/iSFM22.html
). I also needed a male ISO to female DIN adapter (see http://www.discountcarstereo.com/BAA11SN.html
The iSFM22 seems optimized to Apple devices - there is an Android one called the iSFM21 (http://www.isimplesolutions.com/product.aspx?zpid=542
) but as near as I can tell they are functionally equivalent and just come with different app download instructions.
I successfully installed it last night. Here's how it works:
1. Remove CR-210 from dashboard.
2. Identify the switched power and ground lines coming into the radio harness.
3. Splice into the switched power (not continuous power, be sure to test with a multimeter if you are unsure, otherwise you will have a battery draw and eventually dead battery) and ground, connecting the power and ground lines of the iSFM22. It comes with an optional power switch that I did not use. Take appropriate electrical precautions by using good/tight connectors, wrapping wires with electrical tape, etc.
4. Connect the FM radio harness to the iSFM22's radio input line.
5. Connect the iSFM22's radio output line to the back of the CR-210. I used the male ISO to female DIN adapter to do this.
6. On the side of the iSFM22 there is a switch where you select the FM frequency to broadcast on. You can select 3 different pre-programmed frequencies in case one overlaps with a pre-set station you want to listen to, or the 4th option is app-defined.
7. Download the Tranzit BLU app from the iTunes store, see https://itunes.apple.com/us/app/isim...522169936?mt=8
and install it on your iPhone.
8. Power on the car's ignition (last key turn or engine on).
9. Turn on bluetooth on your iPhone, discover, and connect to the iSFM22. The iSFM22 takes about 5 seconds to start up once it has power.
10. Open the Tranzit BLU app and select an FM frequency.
11. Tune the CR-210 to the selected frequency.
12. Select a song on your iPhone (or Pandora or whatever) and click play.
13. Listen to wonderful-sounding, wire-free music from your iPhone on your comparatively ancient CR-210.
14. Now that you have tested this, carefully slide the radio back into the dash and go have a beer.
Your FM reception is unaffected and not diminished in any way. Audio quality from the iPhone is excellent. AND there are no wires -- your phone need only be within typical bluetooth range. All this for under $150.
YMMV but so far I like it and now I'm all set for a road trip this weekend!