[W126 Coupe] Climate control pushbutton rebuilder?

[Mister McGoo]

Richard;
 
Exactly what doesn't work on the climate control?  Does the fan fail to come on until you "slam" the buttons a few times, even the "defrost" button?  Don't get too brutal with them because this might not be the pushbuttons at all.
 
When you take the climate control unit out, remove the bottom cover plate on the main control unit to expose the back of the printed circuit board.  (Pops off easily)  Examine the solder connections along the edges where the board connects to the twelve pronged plugs (both sides).  Frequently one of those solder joints is cracked and makes intermittent contact.  In particular check the connection to the board behind pin 12 on the left side (temp wheel side - remember, it's upside down now). I believe that is the power input and if that one connection fails neither the fan nor the climate control unit will work.  Re-solder that connection and everything will work again.
-Bellamy


Date: Thu, 14 Sep 2006 13:56:38 -0400From: rishayegan at davidson.eduTo: mbcoupes at mbcoupes.comSubject: [W126 Coupe] Climate control pushbutton rebuilder?

I remember one of the members was praising a Benz electronics rebuilder for providing a good and fairly priced pushbutton unit. Anyone know who the person to buy these from is? Mine is starting to bug out (started by buzzing every now and then, now perodically I have to slam the off and A/C buttons repeatedly - or defrost or vent etc - to get it to catch, so when it finally dies totally I'd like to know in advance who to buy from.
Thanks,Richard 
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