Winter car scenic with 1.6 automatic with 130tkm built year 11/99

Hello, maybe you have a few tips. I want to make my winter car fit again. It’s a Renault Scenic 1.6 automatic with 130tkm on the clock. Engine and so everything runs great. That the engine gets a bit louder in the old age. That’s well known with this model. Now to my problem. When I drive and push the brake or the turn signal left or right push the flash in the board indicator with the orange fog light indicator. When I blink it flashes with me when I go on the brake e shines it firmly as long as I stand on it. I also got with when I operate the flasher easily glimmers the brake leak in the trunk cover. It is almost impossible to recognize when it glimmers. But it works everything while operating tatellos. And the second problem. The radio has no juice at all. But first it has to see if there is an extra security for it. I would be grateful for tips, What you mean by what that could be. Oh yes, there would be no problem. And that is if I a strong braking, it always seems to me as if the car takes a little while until it comes down from high to normal motor run you can do something? Thanks for the help. With best greetings