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SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: climate control reset on sl500

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Old Nov 9, 2016 | 06:42 PM
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2005 sl500
climate control reset on sl500
can anyone lead me on the climate control
reset process for a 2005 sl500
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Old Nov 10, 2016 | 11:10 AM
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Old Nov 10, 2016 | 09:56 PM
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Originally Posted by hchouchin
can anyone lead me on the climate control
reset process for a 2005 sl500
I'm not sure there is one. What are you trying to reset and do you have a STAR computer?
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Old Nov 10, 2016 | 10:56 PM
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On most models, you simultaneously press and hold the RECIRC and FRONT DEFOG buttons until their indicator lights begin the flash. I've not tried this on an R230.
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Old Nov 10, 2016 | 11:52 PM
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Originally Posted by Rudeney
On most models, you simultaneously press and hold the RECIRC and FRONT DEFOG buttons until their indicator lights begin the flash.
What does that accomplish, Mate?
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Old Nov 11, 2016 | 10:03 PM
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On ACC panels that support this, it does a self-test. It runs the dampers through all possible settings and checks the operation of the refrigerant circuit. If the indicators stop flashing after 20-30 seconds, then all is well. If not, then there is an error that needs further diagnosis. As I said, I am not sure if the R230's system supports this or not - I've never tired it.
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Old Nov 12, 2016 | 09:40 AM
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One more question, Rodney: do you run the test with the engine off and the key turned to the near-start position, or with it idling?
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Old Nov 12, 2016 | 09:17 PM
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You do this with the engine running, but I tried it on my SL today and it did not respond. I know this does work on W203, W209 and W211 models (and probably other that use that same ACC panel).
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Old Nov 12, 2016 | 11:48 PM
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One more one last question, Rodney. You posted above: simultaneously press and hold the RECIRC and FRONT DEFOG buttons until their indicator lights begin the flash.

I just tried that on my wife's '07 E350 (W211) ... but the Recirc and the Front Defog button are a single rocker switch: press the top half for the front defog, press the bottom half for Recirc ... but either way it just rocks the switch. Is there a Plan B?
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Old Nov 13, 2016 | 12:37 PM
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I think that updated style ACC panel doesn't have the option to do a reset without a scan tool. The ones that look like this do work:











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