I have another question about my 1987 300e (i just got it from my dad so i have to deal with the problems he neglected lol) but anyway, the back two windows don't go down. you can push the buttons and nothing happens. The child safety switch is broken and i'm thinking that has something to do with it. if i replace that switch, would that solve the problem? I found one on ebay for a SEL model but i'm not sure if it would work on mine. Thanks for any input.