Does anyone know where I can buy an aluminum center housing for my climate control servo on a 1979 300SD ? Also looking for the Mercedes plastic center section repair kit part number 000 830 01 98 ?

Hi there,
I don't know where you can get the aluminum housing, but I just installed an Unwired Tools digital servo upgrade kit in my '79 450SL, and it works fine. I did call them to ask a question, and they said they have a new upgraded kit that puts all the parts - the control unit and the vacuum solenoids - in a metal box, which should make the underhood appearance a little cleaner than mine is. They said they will upgrade mine free if I choose to do so.
The digital upgrade eliminates that black control unit that has all the vacuum hoses, wires, and heater hoses attached to it. It replaces it with a small digital control unit that operates a simple heater valve in pulse width mode, similar to what the newer climate control units do with the monovalve.
Regards, RGW
'82 300D/4.3L V6/T700R4 (over 70K miles now, no probs)
'79 450SL
'75 280C

Performance Analysis Co. 1345 Oak Ridge Turnpike, Suite 258 Oak Ridge, Tn 37830 865-482-9175 9am to 5 pm M-F e-mail george_murphy@compuserve.com has aluminum mid chamber with seals 50$ also rebuilds these servos. Great info to have

do you have a web site or address for Unwired Tools? I would like to see the cost ?

Hi there,
You can download the install manual, etc at: http://www.unwiredtools.com . They also have a forum for their products. There is a link on the forum to an install someone did on a 116 that is interesting to see as it shows some pictures of the install.
I purchased the kit at Performance Products. They have a website, http://www.performanceproducts4benz.com, which shows a few parts, but they also have a Mercedes catalog that has a great deal of parts and accessories available. The cost of the upgrade was $699, not cheap, but I felt it was worth it to have the improved performance.The upgraded kit performs all the functions of the original unit, ie 4 fan speeds in heating, 5 in cooling, precise control of the temperature - on the latest revision they replace the Mercedes temperature sensors with their own which are better placed and more sensitive, according to them. At any rate, it works well.

Regards,
Richard Wooldridge
'82 300D/4.3L V6/T700r4
'79 450SL
'75 280C

They have a BIG BANNER AD at the top of the SL Forum. Click the ad for more info.
Phil sells the kits in Fastlane.

Unwired Tools is one of the Sponsors of MercedesShop!

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Hi there,
If Phil has the digital servo kit, it is well hidden - I just spent 15 minutes trying to find it in his online catalog, and it isn't there, at least for my '79!
I would think you should see it by viewing the items listed for "climate control".
At least that's where I found it in the performance parts catalog...

Regards,
Richard Wooldridge
'82 300D/4.3L V6/T700R4
'79 450SL
'75 280C