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  #16  
Old 10-06-2002, 12:14 AM
EricSilver's Avatar
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Location: Fairfax, VA
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OK. I have the cables... but no box. And I can't begin to imagine why someone would have removed it.

I stripped away some of the insulation to expose the wiring. One is pink with black stripe and the other a light green with a black stripe. I presume each would have connected to opposite ends of the missing box.

After switching the A/C on to high, I touched the wires together and got a very faint spark, which was only visible because it is dark outside. This would indicate a weak circuit is being completed in the blower motor circuit, but not carrying nearly enough current to turn the motor. I assume -- and hope -- this is because the brushes are worn.

Over the past year or two, the motor has become progressively weaker, and I supose I will need to have a look. There was an excellent pictoral how-to guide posted here at one time, but it seems to be gone.

Thanks everyone for your help.
__________________
2001 E430 4matic
122,xxx miles
Black/Charcoal Interior

------------------------------------
Gone but not Forgotten:
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black
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  #17  
Old 10-06-2002, 12:17 AM
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Eric,

My first guess is a bad blower motor. I have never worked on one so I don't know where to get at it.

I did do one on a 123, under the dash on the passenger side. It was rather easy. With a 124 body I don't know.

I will do a search also .... I will post the link if I find it.

Jeff
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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)
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  #18  
Old 10-06-2002, 12:23 AM
EricSilver's Avatar
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Jeff, thanks.

The guy who posted it had a web site called "The Poor Man's Mercedes Newsletter." He really broke it down step-by-step and made it seem quite simple.
__________________
2001 E430 4matic
122,xxx miles
Black/Charcoal Interior

------------------------------------
Gone but not Forgotten:
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black
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  #19  
Old 10-06-2002, 12:24 AM
haasman's Avatar
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Eric,

I searched using these three words: 124 blower motor

These are what I consider to be the best results. The last one gives some good words of caution. Hope this helps, Jeff

1989 300TE fan blower not working
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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)
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  #20  
Old 10-06-2002, 12:25 AM
haasman's Avatar
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Hmmmm didn't take the last two, here they are:

Blower fan inoperative - and buzzing?

1989 300TE fan blower not working
__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)
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  #21  
Old 10-06-2002, 01:14 AM
EricSilver's Avatar
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Join Date: Mar 2000
Location: Fairfax, VA
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Jeff, thanks for the link.

I was also able to locate that article through webarchive.org. The text is intact but not the photos, and I have reproduced it below.

I probably will not tackle this right away, but will surely do so long before winter.

Thanks again.

=====================================


Blowing hot air
by Alex Kowalski

After a recent long drive my HVAC blower motor seemed to pack it in. Some of the symptoms included intermittent fan action especially when I hit a bump in the road. Ultimately it just stopped working altogether and would not restart no matter how many speed bumps I straddled.

After a five minute consult with the Mercedes Mailing List archives it appeared clear that part of my problem may involve the blower motor brushes which naturally wear with use. A new blower motor is around $250 from discount sources. George Murphy's Performance Analysis ( tel # 423-482-9175)sells the appropriate soft lead brushes for $15.

I thought I found the cheapest source of Mercedes' blower motors known to man when I can across the wrenchead.com website who claimed to carry them for under $40.

In the above photo you see the new motor from wrenchead sans squirrel cage on top and the old motor with removed squirrel cages on the bottom. Interestingly enough the new motor was made by Seimens in Mexico and packaged by AC/DELCO. Even though they looked very similar the new motor was slightly differently shaped. After many unsuccessful manipulations I realized it would have required too much modification of the plastic holding casing to work properly. Lesson learned, sometimes aftermarket parts really suck!

Since I already had the motor out and need the car for work on Monday I decided I would go to plan B and take a look a inside. But before I leap too much ahead lets have a quick pictorial tour of how to take the blower motor out.


First step involves removal of the single arm wiper assembly. Make it easier on yourself get you wiper to point directly up

Pry open the cover just above the swing arm base, you will find a single bolt (I think it's 10 mm), remove and pull the wiper arm straight up.

There are four bolts that retain the entire wiper assembly, two on the left as in the above picture and two on the opposite side.

Unplug the wiper motor electrical connector and remove the entire assembly

Now that the wiper is out you can attack the extensive amount of engine cowling/baffles. You will note that there are quite a few small screws and bolts retaining the plastic cowling.

I'm not going to show you all of them as they are easy to locate by yourself.

In any case after you remove all that plastic and rubber trim you will have access to the blower motor cover as in the above photo. the cover is held in place by several small spring clips ( six I believe). Once you have the cover off the motor is held in place by a single large spring clip and its electrical connector

This is a shot with the motor out.

As I mentioned previously I ended up taking the old motor apart and find one of the two brushes unevenly worn. Although both still had a fair amount of material left. I filed the one brush with an emery board. These brushes are very soft so you don't have to file much. After reassembly the motor bench tested perfectly. Unfortunately it was getting late and I did not get any good pictures of the motor innards. The removal of the motor took 1.5 to 2 hours plus approximately 1.5 hours to repairing the old motor back to life. All in all, well worth the effort as I figure I saved a $400 to $800 trip to the dealer (depending on your local shop rates
__________________
2001 E430 4matic
122,xxx miles
Black/Charcoal Interior

------------------------------------
Gone but not Forgotten:
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black
Reply With Quote
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