Now the phone is installed, i found the two ends of the aerial -cable under the passengerseat and found out that one was to the antenna and the other end went to the front behind the radio, i just had to put them together. I changed the antenna to a new one from MB with 3 cables and conected two of them to cables that was already in the inner roof. Next step will be the DVD will begin tomorrow.

Thanks again Gilly for the help!