As I mentioned before he also sent in this "Temperaturregler" unit.
000 822 09 03
126.032 - 380SE
126.033 - 380SEL
126.037 - 500SEL
126.043 - 380SEC
126.044 - 500SEC
126.120 - 300SD
Its worth pointing out that this unit is not available from most parts houses. I checked with XXXX ordering through the dealership and the "online price" was $522!
I opened the unit up and found that the large axial capacitor was broken loose. Its fairly easy to wiggle around. I checked and its still holding proper capacitance. I'm planning on stripping the coating off this board and re-soldering it. Also you can see several broken copper pieces that go from the board to the pins... I suspect this was causing quite some problems.
The Temperaturregler actually does quite a bit of the leg work for the climate control unit. I suspect that much of this circuitry was integrated into the later 2nd gen units.
From the ETM the following are hooked into the Temperaturregler:
1- Heating Enable
2- Center Flap Control
3- Automatic Slower Speed Control
4- Fresh/Recirculated Air Control
5- Monovalve Heater Water Valve Control
6- Set Temperature Input
7- In-Car Temperature Input
Pictures:
I went through and re-soldered everything, the large capacitor's solder joints were broken on both leads. I repaired the main contact connections, they should do much better now. I think, while its open, the electrolytics should be replaced as well however I don't have any of these sizes in stock so we'll have to see what its owner wants to do..
