Similar story with my becker Mexico. Even in my case, despte to the fact that I have on the AeroSS an external aerial (stock) the reception was not exciting.
I ended up buy a cheap bluetooth dongle connected in the cd changer (?) plug and I stream everything from my phone. In this wayI can have music, radio, nav, directions and alerts everythign through the car speakers.
Why the mexico? Just because it looks supercool.

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2010 Violet Aero Supersports | 2012 Green Vantage S Roadster