Especially in the autumn days has always annoyed me that the windshield of my A-Class has always been toned. Since no adjustment helped by the fan or the air conditioning - it was just like that. For a few days I have the car dehumidifiers on the dashboard (in addition to the ventilation slots) and have always clear view. Before purchasing you should perhaps consider: The dehumidifier does not look great, it is reminiscent of a wet bag. But, he does the job.