Any window control requires another module. 530T if my memory serves. The unit itself isn't
too expensive, but it is required to run wires into the doors and to the window motors themselves. Labor is what gets you. I think back in the day I would've probably charged $100-120 for the install (shop price, not mine). You're probably looking at ~$200 total.
Back in the day this gave you 1-touch up and down too, it was nice on my 97 240
