Designed to fit the Mercedes-Benz A-Class side windows, these wind deflectors allow you to open your side windows without rain or wind entering the vehicle. Wind deflectors provide many benefits for drivers, passengers, smokers and pets throughout the summer and winter. Yes, they are particularly useful during rainy weather. They create a barrier that prevents rain from entering the vehicle when the windows are slightly open, allowing for fresh air circulation without getting your passengers wet. The deflectors are designed with a slight downward angle that redirects the water away from the windows, keeping the interior dry and comfortable. Do wind deflectors affect the fuel efficiency? The ClimAir range is designed to fit precisely into the window channels without the need for any tools or modifications. The deflectors usually feature a clip-in design making them easy to secure firmly in place. Installation is straightforward and can be completed by following the instructions provided in your delivery box. It's important to ensure that the windows are clean and dry before attaching the wind deflectors for optimal adhesion. We recommend wiping down with some washing up liquid and drying the area before application. Can wind deflectors be used on the Mercedes A Class when it's raining?