I have a W140 not a C140 so can't help much. HOWEVER, I have seen this problem somewhere on this board and its also to do with tinting.
If I remeber correctly, it was because the tech who tint your windows unplug the battery when they did the job so that the entire window stick out for them to do the job. If they keep the battery connected they cannot do the job with the window moved slightly down.
Anyway, to fix, have you try re-programming your windows? If you don't know how, look for it here. Again I think the procedures is something like open the window to FULL open than press and hold the switch for 5 seconds. After that, close the window to FULL close and press and hold the switch for 5 seconds. This should be a fix.