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2005 SRT Crossfire. 1973 Euro 450SL
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59 Posts
Discussion Starter #1
Working on the new purchase, front shocks today removed air cleaner and noted this little part on the fire wall with a screw in the end. So it has something to do with vacuum, there is one next to it hooked to vacuum. Still waiting for my service book to arrive so I will have a reference book.
Thanks
Dan

2613214
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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31,899 Posts
Remove the screw. That is a vent to atmosphere connection.
 

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2005 SRT Crossfire. 1973 Euro 450SL
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59 Posts
Discussion Starter #3
OK, will do right now, what system is that for?
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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31,899 Posts
Should be connected to the heater control valve.
 

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1973 450 SL
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1,831 Posts
Those are called switchover valves. Made by Pierburg, they are vacuum solenoids that provide vacuum to either side of the vacuum pod on the heater faucet immediately to the right of your picture. They are controlled by the heat slide levers on your climate control panel. The climate control panel has microswitches at the bottom position of those heat slide levers. They provide the electrical signal to the switchover valves.

Service Manual 83-020 Control of Heating System
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,084 Posts
Still waiting for my service book to arrive so I will have a reference book.
Thanks
Dan
Dan, You probably know that all the manuals are available on-line. https://www.startekinfo.com/StarTek/outside/11883/?requestedDocId=11883
For engine, I find oncebitter's site easier to use. http://www.oncebitter.com/r107/

If you like hardcopy, you print out just relevant page.

I have MB paper manuals for engine, two for chassis and one for Heating/climate control. But still print and use the on-line ones when doing a job.

Cheers
 

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1986 560 SL
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7,302 Posts
Like MGB I have a complete set of paper manuals. They have never been in my garage. For a while I left them for casual reading in the WC but they lost out years ago to the daily crossword puzzle.
 

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Registered
1988 560SL (California Model)
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5,087 Posts

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,084 Posts
Reno - You realize that oncebitter's site has the engine manuals already, so no CD or download needed?
 

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1973 450 SL
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1,831 Posts
Nervig's shell is a great tool. I used a freeware HTML editor to tailor the articles for scanned pdfs of my early edition service manuals which use a slightly different numbering scheme. It would be slick if we could get a similar shell built for the EPC.
 

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Registered
1987 560SL (L.Tonk) [92,700 miles]
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263 Posts
The layout on OB's page is Steve Nervig's well done index that is used along with the CD. Been using it for years. Maintenance manual CD will need to be copied to your hard drive. Here's the website/download which includes an install/readme .pdf...

http://mercedeslist.com/serviceindex.html
Reno is correct, although I got the lot off some shady ebay dealer and only found out about Steve's site recently. I also had to massage things slightly to work on Linux, but the intent was to provide quick and linkable reference for the forum. It's currently R107 only but I'd be more than happy to host the others if someone provides the files.

If you'd prefer a local copy, you can also download the whole salami using wget or some similar utility.

I've also started collecting other resources as they pop up and stashing them here. Feel free to send additions!
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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