Probably!
An antenna adapter was required to install a stock becker nav unit to my crossfire.
the nav unit had a button connector where the stock radio had a long plastic clip type connector.
The adaptor came as part of the nav system along with extra wires to tap into the speed sensor and reverse sensor switch as some cars are not pre-wired for the unit.
My technician said i was lucky that my car was pre-wired as apparently the wiring loom needs to be tapped into and soldered to and is a bit*h!!
You should be able to get the ariel adaptor from your dealer.