My windows on my Mercedes 420 SEL are stuck half way up? Could this be a relay ? and if so where would it be located? Or could it possible be the window switches? The fuses are fine, but I am having a hard time locating any window relays, if anyone can help with a diagram or suggestion I would be most elated , as I live in Ohio! Brrr! 39 degrees this morning. This is my first time to this forum and apppreciate any help