Parrots and Bimmers: how to?

Hi! I'm in the process of getting either an MK6000 or a CK3000 Evo to install in my 2006 BMW 325Ci, Euro build, equipped with an Alpine Business sound system. Since I'm in Mexico, BMW's sold over here come with European module programming, accessories, etc., in contrast to USA or Canadian units. I would like to have control of the Parrot with the steering wheel buttons.

Do I need an adapter harness or can I expect to plug the Parrot directly in as-is?

BTW, I will pull the radio head ASAP to determine whether it has round or flat connectors. Don't remember and forgot to take pictures when I installed the BMW AUX input cable a few months back.