Installing Dash Cap - Climate Sensor - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 09-29-2009, 02:33 PM Thread Starter
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Installing Dash Cap - Climate Sensor

Hello - I have just purchased a 79 450SL...Now the adventure begins. I am starting with a dash cap which I have read to be easy. Everything I read says "pull the climate control sensor out" Not so fast - mine appears to be hardwired? I called the dash cap manufacturer for advice and they only said everyone just pulls the hoses off and then trims the opening. Again, mine has wires under the hose and appears to be soldered directly to the sensor. The overall unit appears to be 2 pieces but I dreadfully fear prying too much and cracking the entire unit. Appreciate any thoughts before heading to my mechanic..
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post #2 of 3 (permalink) Old 10-06-2009, 10:49 PM
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Here's the way I remember this...on an 85 SL. the sensor has a top "grate" and the bottom part fits into it, it can be pulled apart. Then, the top part pops off from the top. Once I had the cap EXACTLY where I needed it, I marked the underside of a cap with a paintbrush up through the (now sans sensor assembly) hole in the dash. I deliberately went a little smaller than needed and then adjusted this later when the dashcap was RTV'd down, by trimming with a cable-operated Dremel-like tool. That ABS plastic is VERY tough. You need a very small tool to trim with because there really isn't much room to work with there.

Btw, be careful with the thermistor, it's very delicate. And contrary to what you might read, no, you can't get one with the proper temp/resistance curve from Radio Shack for $2.00.

If you search this site, you will find pictures of this sensor and the (usually deteriorated) hose associated with it.


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Last edited by strife2; 10-06-2009 at 10:54 PM.
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post #3 of 3 (permalink) Old 10-07-2009, 06:42 AM Thread Starter
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great - Thanks!
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