Quote:
Originally Posted by vtmbz
Im electrically challenged. Lets start with that.
I'm not getting voltage to my kickdown switch, which I believe comes from a cube relay in a box after the fuse terminals. IIRC. So thats one question. I cant test that cube.
I also seem to have issues controlling the cabin temp-- the little fan works, the vacuum pods seem to work, and I wish I knew if whichever relay feeds into that system can be ruled out or not.
So yes, I could just start throwing new relays in, but since I ran into a guy who runs a lab that builds electronic devices for the military, and he offered to have his geeks test whatever I sent him, Im going to pull them all out this winter and send them over to him.
Costs me nothing, and amuses a box full of geeks-- whats not to like?
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No power to your kickdown switch (this is a 190D, right?), this means you have a problem with the Klima relay. It's not one of the cubes. The Klima is located in a hidden compartment behind the battery. Remove the weatherstrip under the windshield, and pop off the plastic cover. The Klima will be an oblong box about 2.5"x3", and it's marked Klima. There are many different Klimas, you need to match by part number.
I assume you have a prblem adjusting temperature...probably stuck on full hot. This is a complicated problem, involving vacuum and electronics, but is most likely a vacuum problem. Start by reading this writeup:
Troubleshooting the Mercedes-Benz 190 Tempmatic ACC Climate Control System
A vacuum leak ANYWHERE can cause problems with the tempamatic...I usually begin by replacing al the rubber elbows in the engine compartment, and then ramp it up if necessary.