I have a 1995 E320 Sedan (W124). I installed an aftermarket keyless entry & alarm. However, I would like to connect the aftermarket keyless to the factory alarm so that the factory alarm is armed as well as aftermarket when I use the keyfob. I have located the factory alarm under the metal panel in the passenger footwell. I thought that when the keyless system locked the doors, it would be the equivalent using the key, therefore activating the factory alarm as well. Unfortunately, it doesn't seem to be working that way. Please advise on how I may be able to do this. Thanks alot. In addition, if you know which wire activates the factory alarm, that would be a great help.