I have been driving my new 82 300SD around for a couple of days. Ive spent a lot of time working the bugs out. The front power windows aren't working. at first i thought it was the switches so i cleaned up several sets and tried them all. both the back windows worked with all switches, the fronts never worked with any switch. i am now positive the switches that are in the car are a working set. you can actually see the draw in the dimming of the dome light in both positions of both front switches. anyway, i am wondering if you guys can help me with the next step. i noticed when i had the driver door panel off there was a 2 screw terminal mounted near the lower right of the door. i think it was a green an black wire. they looked like they went to the power window motor. are these positive and negative leads? if i had a 12 volt drill battery, could i touch these terminals with leads from the battery pack and cause the window to go up or down depnding on polarity? just want to know what the next step in trouble shooting is. i never realized how terribly inconvenient it is not to be able to roll down your window. oh, and no blown fuses that i can see. please help

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1982 Mercedes 300 SD