Yes, I found that the switches for the windows on each side are connected, so if the Front right-hand side was disconnected, the rear right-hand side won't work. If this is what you've got, it's likely to be a switch problem.

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190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg