I have a 1996 E300D and the stock stereo has been replaced. Now we are having security issues which I think might be related to the stereo. Every so often after locking the car or leaving it for some time we get the security lights under the mirror to flash and then the car will not start. We have to get out lock/unlock the car, sometimes several times before the car will act normal and start. Is there a removal sensor for this year and if so where is it located? Any help would be much appreciated.