Hey, I am new to this forum and here is my problem. I am installing an after market alarm on this Mercedes. I want to be able to still roll up and down the windows with the after market remote. Right now I can roll down the windows by sticking the key in the driver key hole and holding it to lock, and roll them up by holding it in the unlock position. I have read in other forums that I would be able to send a long enough pulse to the lock/unlock wires to roll them up and down. I am able to send a pulse to the lock wire that will roll up all the windows, but I am unable to use a negative pulse to roll the windows down. I was wondering if maybe someone knows some other wire or way there is to go about tapping in to the factory system to make the windows roll down. Any help with this will be greatly apperciated.