I have a early e36 325 and came to it today and the alarm went off (I hadn't set it) and the car will not start and the alarm keeps going off, I diss connected the batt for a couple mins, and it started for a second the immobilised it's self and the alarm went off again, I had a bit of a crash Friday but it's been fine since. Any ideas ? Can I have the alarm removed? Is it costly? Or easy to do my self