Greetings all,

The Background:
The cabin temperature sensor on my '97 S500 is squealing like a banshee so I ordered a new one (140 830 0472). This is a small sensor and a fan to draw air over it. The bearing on the fan must have gone bad. Oil turned a loud squeal into a soft buzz still much to annoying to live with. Besides the part is only $19.50.

The Question:
After I replace it will there be any calibration required? My only other experience with climate control is on a Chrysler and whenever there was a large change in season (Fall and Spring) I had to calibrate the system. Is there any similar process in a MB?

Thanks.

Just Plug & Play the sensor!

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
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44 years foreign automotive repair
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MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Where is the sensor located? I think mine may have gone out too, and at $20.00 bucks, I'd like to replace it myself.

KG

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Ken G
96 S500 79K (great white whale)
98 E430 80K Sports Package (gray ghost)

I went to pick up the part at the dealer and was surprised to discover it was the wrong part. I got the number from www.alldatadiy.com and while the description was correct the part# was wrong. The actual part number is:140 830 0008 and its cost is $68.

The part is located behind the small louvers in the same console as the overhead lights and sunroof switch. Removal is easy: pop off the two light covers as you would if you were going to change the bulb, release the two clips at the bottom of the assembly and pull it out. (BTW Alldatadiy was wrong on this too; they showed screws.) NOt quite sure how the part itself will come out but I think having the new one in hand will make it obvious.

I guess the moral of the story is when ordering parts and the nice parts man says “I will look that up for you…” let him do it!