if someone can help.

slk230 1999 , the interior lamp stay on even with all door shut, both front windows won't go down,the s98 roof swith never light, the roof doens't move either, the door won't look when riding. only the passenger light will blink when remotly lock or unluck the door.

I took a look at the PSE in the trunk, yes I found some ( just a little ) corosion on some pins, I clean and all my problem are still there. I took a look at most ground that didn't change any status either.

any ideas,

thanks