Is the head unit the original unit which came with the car, if it is you can contact your local dealer and they can look up the code on their database (and some times charge a small fee), failing that there are a number of websites which ask for the head unit serial number (which is on the rear of the unit) and can generate a unlocking code. Finally the last option available to you is to get the radio 're-coded'.
Please let me know how you get on and if you have any follow up questions, and I will try and assist you further.
Good afternoon do you require any further assistance?
Good morning Jonas, I havent heard from you in the last couple of days do you still require assistance?