Just thought this might be some useful info for anyone with Cabasse, thinking about adding an external device.
The Parrot kit has a line-out, in the form of four loose wires, representing right +, right -, left + and let -. When I fitted the same kit to the Honda, I was bemoaning the lack of plugs, but with Cabasse, it is actually handy as you can wire these (need to extend them first) directly into the red plug into the underseat stereo unit.
For reference, the rellevant pins are as follows;
27 ground
28 right
29 ground
30 left
If you remove the grey clip from the plug, you will see that one side is already partially populated. We are interested in the other side, where position 30 is the diagonally opposite the populated area, i.e. the opposite side, and opposite end.
Rather than cutting the plug, I cut up an PC internal audio cable, fitted insulated connections, and inserted the brass sockets from the PC cable into the red plug.
The parts that I used to fit the Parrot kit were;
Parrot Mki9200
2.5m double ISO extension loom
5m dual core wire (to extend line-out)
2.5m single core wire (to extend phone mute)
Various bullet type insulated closures
PC audio cable, with four pins populated
Stereo removal tools
Various cable ties
Disconnect negative terminal of battery
Remove & disconnect dash mounted head unit
Remove & disconnect Cabasse unit under drivers seat
Remove side access panel on drivers seat
Disconnect airbag plug
Detach seat wiring from rear of Cabasse mounting
Undo 4 x torx bolt securing drivers seat
Remove drivers seat
Remove interior trim at bottom of drivers door, to kick panel
Remove door rubber alongside drivers A Pillar
From the Parrot kit, take the microphone, remove the self adhesive mounting and instead fit the slide clip mounting, fit the mic above the rear view mirror, guide the wiring just inside the headlining, around the top of the A pillar (this is tricky) then down the A pillar and refit the door rubber here to secure. Run the wire down to the drivers footwell area.
Assuming you are going to fit the screen where I put it, this is also a great opportunity to do that and again guide the wiring, behind the door rubber, down to the drivers footwell.
Take the Parrot wiring loom and connect it to the ISO extension. The mute wire isn't populated on the extension, connect it to the the extra single core wire with an insulated closure, then along ISO extension to extend the phone mute. The line-out wires also need to be extended, so take the 5m of dual core wire, cut to 2 x 2.5m, and use to extend the line-out wiring. You can now fix these additional wires to the rest of the ISO extension harness. Take note of the mute wiring on the Parrot loom, the Clio (like most modern Renaults, I believe) uses mute position 3. Confirm which wire this is at the stereo end of the extension, and you will need to chop the existing wire (it doesn't do anything as that wire isn't populated on the car loom) and join to your extended mute wire, so it connects to the headunit.
Take your PC audio cable, chop the connectors out of the plug, join them to the extended line out wiring, and push into the respective positions on the unpopulated side of the red plug.
Connect the ISO extension to the car loom, run it under the carpet, along the bottom of the door aperture, and up the drivers kick panel. Secure using existing clips where possible.
Reach down through the stereo aperture, while reaching up from the footwell, and pull the Parrot loom into the stereo aperture. This is awkward, I cheated by pushing the cable for my Scangauge down through the hole, and taping it to the Parrot loom so I could pull it up. Do the same with the wiring for the microphone and screen. Connect up to the Parrot blue box.
Using a conical hole saw, drill a hole in the side of the glove compartment for the input wiring. Push the plug through and pull if from inside the stereo aperture. Connect to the Parrot blue box.
There is enough space to mount the Parrot box to the rear of the audio aperture, tuck it away, reconnect the head unit part, and refit.
Tidy up the excess loose wiring and secure to the bottom of the dash using cable ties, so it is all nicely tucked away.
Refit drivers seat, reconnect airbag (it is awkward to get the wiring back into place), push stereo wiring through the back of the Cabasse aperture, to the front, and reconnect Cabasse. Push Cabasse unit back into place, with a hand at the back to try to keep the wiring tidy. In all probability you won't be able to refit the rear cover on the Cabasse unit, due to all of the ISO plugs, etc. but this shouldn't be a problem.
Reconnect battery, enter radio code, pair phone, connect iPod, marvel at your success!
Anything that doesn't make sense, please ask, thanks for reading.