Bad radio signal

[Mikey]

So in my X i got realy bad radio signal, (way worse than a m8 and his X) got the navi stuff no drs. Do belive i might have found the fault and was hoping someone could help\confirm this.

On the rear of the car i found a cable (behind the plastick ofc) coming from the roof, its a black cable with copper and red+yellow inside, it has been cut right before the cd changer\navi cd player. Cant find the other end ( do suspect it has been removed ) Retard befor me had fitted some china crap replacement navi and he should not be allowed to fiddle in cars >:(

So if anyone does know the wiering codes from the antenna etc plz do help me out

red spot marks where i found the cable

[Mikey]

So il post my findings here incase some one else gets this problem. The cable i found was from a old reverse camera witch was no longer installed on the car. My signal problems was from the "antenna booster" having issues ( located with bmwscanner 1.4.0 ) deleted error code and problem was gone