I have had a problem recently where the electric windows weren't working, which i noticed only once I was moving, shortly after starting. once stopped and in P, they were sometimes ok, sometimes not. I presume at this stage that it is maybe related to load reduction circuit.
The next time that it happens, I'll check the other functions.

mine is a UK, RHD model

85 WR quattro
90 V8 Silver, 91 V8 Black, 93 V8 Lago
93 100e quattro V6. Titan, i think