Three questions:

1) I'm not getting much hot air blowing anymore from my 1985 300d turbo deisel... 80% of the time it just blows cold air. This is a big problem, especially here up north where it gets very cold.

Any suggestions for fixing the heater? Thanks.

2) Also, the windows just all stopped going down all of a sudden. I cleaned the switches but to no avail. Options?

3) Whats the best online source to download a PDF of a repair manual for this car?

Thanks.