This car is a Euro spec one, since that seems to matter. And my driver's door has two switches, not just one. I can hear a relay click when I push the door switch that enables the window in, even if the car is on. Is the power supply wire for the sunroof routed in such a way to make it easy to connect it to this relay?

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1984 300D
Euro spec, 5 speed
217,000 miles