I noticed that your Sport has an alarm. In the Owner's Manual is states that you can program you key fob to open all doors with one push. On checking with Fiat Customer Service, I was told that you could only do that if the car hasThat would be annoying. Mine only honks on LOCK, and makes no noise other than the unlocking noise itself when unlocking. Mine might be different 'cus I have the Sport with the alarm, though. Hopefully someone will have an answer for you. If your car has the EVIC, check the options for something related to unlock sounds.