Hi, I bought my E320 Wagon 99 and my rain sensor just fell off. I mean it got disconnected from the windshield. Is there any way to glue it back? I tried to push it against the window and it reacts to water, etc. so I guess it works, but I need to attach it somehow to the windshield. I noticed, that it makes difference how much I push it against the windshield to react, so I wonder if there is any particular way how it needs to be glued to the windshield.