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Old 04-12-2002, 08:41 PM
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aTOMic aTOMic is offline
Join Date: Aug 2001
Location: Hendersonville, Tennessee, USA, Earth
Posts: 451
The cabin temperature sensor in the W210 cars (at least) is a tiny fan in the same assembly as the reading light. It is similar to the cooling fan in a computer (as far as the motor is designed) and it drove me nuts on our car when I first got it. It sounded like it was coming from the dash until I leaned forward and traced it to the headliner area. It runs for about five seconds even after you shut off the car. If this is your noisy thing you can try cleaning it by vacuuming it or removing the light/sensor assembly and blowing canned air through it, mine got a lot quieter after some dust removal. HTH,
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'96 E 3 2 0 (W 2 1 0) M 1 0 4

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