Funny thing is I am having the same problem from time to time with alarm system on my 1995 380SE.
One time I was driving on Interstate and I noticed that everybody in front of me started pulling over when I was getting closer to them. Then I realized that my headlights and my turn-singals were blinking alternatively.
Once I stoped and I left the car for a couple minutes the alarm somehow reseted itself. This happened to me on two or three occasions. If the alarm activates while you driving the workaround is to turn your headlights on even if you are driving during the day. While the alarm is still on turning the headlights on will stop them blinking.
I am ready to disconect the sucker for good.
I hope the wires are in my car also in the same place where Benzmac says.