This question concerns a 2006 MCS with just the stock head unit with single disk CD. (no Nav - no sattelite radio)

If I understand correctly, the standard radio antenna also includes the antenna for the factory navigation. If we use a portable Nav unit that has a connection for an external antenna, is there a way to get a connection to the factory Nav antenna?

Thanks for any information.

Old post, but i've got the same question, so... le bump!

Do you currently have the portable nav unit? The reason I ask is there doesn't seem to be too much of a problem with portable units getting a signal.

tis true in typical mounting spots. however i am contemplating relocating the unit to a more obscure location than on the windscreen. trial runs don't like where i've put it so far.