hi guys, im new here and am a bmw man myself but my old dear has a c200 kompressor and im trying to help her out, hopeing you guys can give me some advice

1. the car is always misted up at the mo, back windows are terrible and i dont understand why, read a post just now about clearing the drain in the plenum chamber so im off to try that out in a min

2. the parking brake releases fine but sometimes the light wont go out and the warning siren comes on when u pull off, the brake isnt on at all and you end up reapplying it a few times until it accepts that the brake isnt on??

3. there is a strange nocking sound from the rear, thought it might be exhaust catching or brushing onto something, occurs mainly on speed bumps, leaving curbs etc

any advice appreciated

 

well ive had a look at what i think are the drains, 3 of them in the black plastic part between window and engine bay, no noticable blockages so gonna dry it out with max aircon on recirc and see how i go