Hello guys! I bought an Omega C year 2000 last week. And by that I have no experience with the car at all with equipment and retrofitting possibilities I turn to you! So I have e.g. a small antenna so about 10 cm long at the back of the roof and do not know for what it should be because the radio antenna is so told to me is integrated in the disc at the back?! Furthermore I have a question about the radio what is inside. It is a radio with cassette and 4 times Wechler with monochrome display means the on-board computer. However, the CD player spins, I have looked at some radios from Signum and Astra offered in Ebay that would support MP3 as well. Are these “things” also to operate in the Omega?? I would be extremely grateful for your help