The Parrot MKi kits are great, especially the Parrot MKi9200 which I use on a daily basis, but the only downside to wiring this in as standard using a Sound on Top lead (SOT) is the sound quality is a little mediocre. However, the Parrot MKi kits come with an Auxiliary output (Parrot Aux), which allows you to wire these kits directly into the aux input on the back of your stereo. Lucky my Ford Focus MK2 comes with an Auxiliary input, which allows me to use a MC9985 Lead (Ford Focus MK2.5 Only) – Also known as a INKA-048-2082 lead.
Using the Parrot Aux output, this lead allows you to stream your music, or use the inbuilt USB/iPod/3.5mm Jack lead to play music via the Aux function of your stereo, and when a call comes through, allows you take this as normal (Putting your stereo on mute).
You can wire the Parrot Aux in manually, but this would involve chopping wires, using pre-made plug and play connectors are the way forward, and is easily removed when it comes to selling the vehicle.