So I am installing my new Xtrons radio into my 2004 3.0 E53 and the alarm starts going nuts. I cannot lock / unlock doors from the key fob. The LED on the rearview mirror is flashing. I cannot open the trunk from the keyfob to access the battery. The drivers door is unlocked. I have pressed buttons in all order on the fob to no avail. If I put the key in the ignition, few lights come on and this thing is staring at me really funny.
Any suggestions? I am a little panicked at how this thing is acting.