Report: Window Regulator Failure is Common
Mercedes-Benz 560SEL Problem
One or more door windows may stop working due to a failed window regulator. Replacement of the failed regulator will be necessary to correct this concern.
Visitor, 1991 Mercedes-Benz 560SEL, 261,420 mi
2 of the button are stuck and i switched the button out with one i had it still didn't work.