Sure..


I could make a guess that you have a bad compressor contact set in the Klima and they used a seperate relay to remedy that so as not to have to replace the Klima, but I don't like to guess...so if I simply have the terminal ID #s matched up to which/where they ran the wires , it would be like me having a wiring schematic and I could then have a correct answer for you.

...hate to twist your arm for that info, but that info determines the answer.

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A Dalton

Why wouldnt they just get a new klima? I will get a better look tomorrow.

http://catalog.peachparts.com/ShopByVehicle.epc?q=1986-Mercedes--Benz-300e-Climate--Control&yearid=1986%40%401986&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6198%3AMBC%7C1507%3AED%7C10000013%40%40300E&catid=242213%40%40Climate+Control&subcatid=242276@@A%2FC+Relay&mode=PA


That's why...

$6 vs well over $100.
But that is still just a guess...it could also be they used the relay by-passed the RPM speed control on the comp feed.... or to activate the aux fan w/comp run signal, etc, etc ,etc......so, you see, until you have the term/wires listed here , me and anyones else is guessing what they did to the stock circuit with the install of that relay..it is THAT simple.

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A Dalton

Ok, 87 goes to compressor, 85 goes to klima, 86 ground, 30 battery. What is this relay doing?

OK

They are using Klima sig to the relay coil to trigger 12V Bat load to compressor.

Jumper 30 and 87 and see if comp clutch pulls IN. [ it should]

If YES...................

Then trace 85 back to Klima and see which terminal they used there......

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A Dalton