CoreyNJ

Note: Part numbers sometimes change without notice. Always double check with your supplier that you have the latest part numbers. My PCM2 unit was purchased used, from a 2003 Carrera coupe, which was upgraded to a custom stereo/navigation system. This was my experience and I take no responsibility for anyone else using these instructions). The PCM unit includes the main system plus the navigation module (the module with the blue antenna hookup). There is space at the bottom of the unit to slide in 2 more modules, which I assume may include a cell-phone (like in Europe) and voice control module (the button is there on the front, but it does nothing). Here is my installation procedure: It took me 2 hours 15 minutes. Parts you will need 1 ea 000 044 900 70 PCM2 Retrofit Kit The retrofit kit contains the main PCM2 unit, navigation module and the following parts: 1 ea 996 552 339 00 01C (use your trim color code - 01C is satin black) A/C Panel Trim 1 ea 996 642 206 00 GPS Antenna 1 ea 996 612 009 00 GPS Antenna Lead 1 ea 996 552 231 12 01C (use your trim color code - 01C is satin black) Support Frame 1 ea 996 552 653 02 Retaining Bracket Tools you will need Standard hand tools (i.e. screwdrivers, trim removal tool, etc.) I only received the unit as the other person re-used the brackets and harnesses for the new system. Here are the additional components besides the PCM2 Main unit (see other items above). 1) new front support bracket under the horseshoe. 2) new rear support bracket that holds the PCM unit, and cup holders. 3) Trim piece for the A/C control (it must be moved to the bottom of the front center console). 4) GPS antenna. 5) GPS antenna lead. 6) Becker radio removal tools (not pictured). Open the front hood and disconnect the car battery now. Next you need to remove the carpet in the front center console (just pull it off) and the leather/pleather trim piece from the side (yank hard from the back, it pops off also). Horseshoe: To remove, use the back of a smooth plastic spoon or a hard plastic card to remove the horseshoe (so that you will not mar or damage the horseshoe). You will also have to disconnect the A/C vents I found using 2 small jewelers screwdrivers one in each vent allows the removal of the unit. Next reach behind the center console and push out both the CD Holder (if applicable) and the storage bin(s). Remove the horseshoe by disconnecting the cables from the switches and cigarette lighter. Notice the clips may have to be removed from bottom to top as you can see in the pic there is also a lock that need to be popped out to remove each connector. Next pull the trim off the A/C controls (it just pops out), and then remove the 4 screws holding the A/C controls in. Unplug and remove the A/C unit, discard the 2 spacer's you won't need them. And using the Becker radio removal keys (they insert into the slots on either side of the radio), remove and unplug the CDR23 radio. Then slide the A/C vents out if you have not done so already. Next remove the screws holding in the front support bracket, this will make it easier to work inside and we have a new one with an open center for the PCM unit. Take the A/C cable and carefully (try to avoid kinking the orange fiber optic cable from the CDR-23/Stereo/MOST bus that always seems to be in the way) snake the A/C cables down the right side of the console as shown below. It will be a tight fit due to the glove box being in the way. (This part took a good amount of time so that I would not break or damage anything). I moved some of the rubber trim under the dash and barely twisted the connectors through. Next put the cables through the center hole in the metal bracket directly behind the front center console. Pop out the batwing so that you can push the A/C unit in and install the 2 screws (note: you will have 2 extra screws now). Also plug the unit in from behind. When you are done, push the batwing back in, you can also re-install the cd-holder/storage bin and snap the new trim piece around the A/C controls (you may need to move the clear plastic bushings from the old trim to the new piece). Next unscrew the rear support bracket and replace it with the new one. Now for the really hard part... The GPS antenna... The alarm cover is removed buy squeezing the rear of the cover furthest from the windscreen while pulling up. It is not an easy task the first time. You will also need to unscrew with a T15 torx (I used a torx socket and my fingers with no wrench) the two screws that hold the alarm LED carrier, be careful not to drop them in the vent. Next you will need to "pop" the two plastic dash trims on either side of the carrier to remove it and run the antenna cable later (I wedged a flat screwdriver on the carrier to pop the ends of the 2 plastic dash trims, but did it in a way not to damage anything, then I used my hands to pop it just enough so I can remove the carrier). In this step first run the GPS antenna lead down the hole where the alarm antenna is run. You will be able to see the hole, from the center console to pull the cable through if you slightly flex the A/C vent ducting. Grab the cable and lead it down and round the ductwork. The GPS antenna is held in place by a magnet. With the antenna cable towards the front windshield, it should pop on. You will need to plug the GPS antenna into the lead wire and place the combined plugs under the front of the alarm carrier. This is the only way you have enough room to reassemble everything (see previous diagram). Remove the cupholders from the old front support bracket and attach the cupholders to the new front support bracket. Next route the cables through the front support bracket as shown (do not screw in the bracket yet). Connect the cables to the PCM unit as follows. Note: in retrofit cars there is no diversity antenna (yellow antenna connector). Slide the PCM unit into the front bracket, and using a 5 mm hex wrench extend the locks on either side of the PCM unit from behind the front bracket. Fit the front bracket in place and install the 4 screws from the old bracket. Next snap the horseshoe into the central vents and hold down the A/C vent locking tabs while you reinstall the combined horseshoe/vent unit. Then push around the horseshoe to lock it in. And re-connect the battery... Finally, go to the nav display and select "Tire-Change" this will tell the unit to re-calibrate. You will need the dealer to use the PST2 to program the OBC to recognize that you have a PCM2 not CDR23. This will allow you to have the option to display navigation directions in the multi-function display under the tach. I'm also not sure if the PCM2 unit came from a different vehicle configuration or was a new replacement unit if the anti-theft system would also need to be programmed with the PST2/3 to prevent the unit from shutting down. In my case I was fine.