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At low blower speeds, my heater fan chirps. Is it possible to access it from under the hood like the W140s or do I have to tear the dash up to reach it? I just want to squirt a little oil on the darn thing.
 

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Just remove the cabin air filter housing under the hood, right above battery, and you can see the fan and get some lubricant into the shaft. Unfortunately, the chirping is likely caused by failing bearings, and to replace the motor does require digging into the dash.
 
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