Since the arrival of the cold weather (I am in the frozen north, boy is it cold this morning -18 Celsius or 0 Fahrenheit), the passanger side windows operate very sloooooooowly when I roll them down (upwards they work a bit faster). The colder the ambiant temperature the slower they work. Did anyone have come across the same problem? I am assuming so because my friend has the same problem with her '87 300E. Should I lubricate the railing or is there another sollution to this?
Thanks in advance,

Alex