Radio crackling problem. And the voice from behind

Friends, in my 206 vehicle, I think the antenna is getting water and because of this, the radio is making a crackling sound. Because I saw rainy weather humidity in the upper lamp. How can I do this cheap? Also, in hard pits, there is a knocking sound from the back, I know that the shock absorbers are not broken, it did not show up in the expert, nor did it come out in the inspection. Why does it make this sound?

Hello and good luck with your car. It's normal for most 206s to make a noise when getting into a hard pit. But when the rear seats are full, the sound is less. Don't worry about it. The video in the link below will help you for the

thank you so much thank you so much

But the video you mentioned for the radio does not open, it has been removed