I ahev a 1992, 300E, with central locking and electric windows, and there are a total closure function, as I lock the door, and turn the key anti-clockwise, it will close all the window automatically.

Problem is, the last owner have install an alarm, and cannot find the wire for the total closure function, so, can anyone kindly tell me which wire is connecting between the central lock/lock and the window? where is it??

Gary!