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  #1  
Old 06-12-2010, 11:04 AM
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Join Date: Jun 2010
Posts: 2
99 E class blower regulator

Hi everyone. I've read this forum for years, but this is my first post.

I saw the answer to this question in a post a couple of years ago, but I've searched and cannot find it. The search terms turned up over 300 posts!

I have a 99 E class, and the blower motor regulator finally went out completely. For the last year, I've been able to pull a few tricks to get it working again, but now it's out completely.

As you mechanics know, the dealer states that the original regulator has been superceded, and it requires the replacement of the blower motor too... at a cost of several hundred dollars.

I read here before that the regulator from a mid-2000's M class can be easily modified to fit an E class (just some wire splicing).

Can anyone tell me which M class and what year range?

Should I trust one from a junk yard? I suppose this would be OK, since these are supposedly a better design.

Thank you in advance.

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  #2  
Old 06-12-2010, 02:38 PM
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Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
Posts: 4,874
The retrofit was using a W140 regulator.

The retrofit may be avail as a kit now. Click the Fastlane link above.

While there, check the regulator for your year too. It was replaceable on my 99. You MUST pay close attention to the chassis cut off number range to determine if applicable to yours as well.
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N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)
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  #3  
Old 06-19-2010, 10:25 AM
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Join Date: Jun 2010
Posts: 2
Hey, thanks for the reply. Just to close this out...

Unfortunately, my chasis number is before the cutoff. My options are change the blower too, or modify one from an S class (as you said).

From looking at the part numbers available on Fastlane, it looks like the part number changed after 1999. I was hoping to do this on the cheap by installing a used one from a mid-2000s vehicle. But I would be hesitant to install a used one that is 11 years old, even if it's the better design.

I don't know where I the idea that one from a mid-2000s M class would work (senility maybe?). It seems that almost all my original assumptions were wrong.

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