Where can I find complete vacuum diagrams for my 1983 300SD? I think I have a leak as things respond slowly.

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1983 300SD
200000miles

I suggest obtaining the Factory manuals, available from either MBUSA or a variety of other vendors on computer CD. You can also find them in the out-of-print books on places such as Ebay. The Electrical Troubleshooting Manual (ETM) has the complete vacuum circuit diagrams, and should help you. It helped me identify why I wasn't getting turbo boost in my '86 300SDL. Turns out, all I needed to do was to switch vacuum lines at the switchover valve. That alone was worth the $130 I paid for the CD!

Just my 2¢ worth.

- Casey

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Casey Cooper
"From a long line of Mercedes ownership"

'86 300SDL 250K miles (Gone, but not forgotten); best diesel I have ever driven, too bad about the Achilles heel.

'81 240D 370K miles (Sold to my brother after 9 years and 150K miles of reliable driving!)

[Five other Mercedes in family clipped for less length.]

try this site you may find what you look for. I found mine.

http://skinnerbox.steaky.org/Service/Library.html

Also look here:

http://www.peachparts.com/shopforum/showthread.php?t=105297&highlight=w123

Climate control works fine for about 30 to 40 minutes then no heat or cooling comes out of any of the vents, blower cycle to high speed but nothng comes out of any vents. What is the problem? Mario 3