I replaced the blower motor in my 1990 300CE today. Because I've seen numerous posts from folks who wanted photos of the disassembly process, I took some pics and threw together a little web page.

:EDIT: (Moderator whunter)

This DIY is now in the Wiki HERE.

Excellent work - thanks for taking the time.

Yeah! Great job! My blower is squeaky on my W124, and I though getting to it required dismantling the dashboard!

The pics are certainly helpful!!!

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car

Mine sqeaked intermittently for about two months before finally giving out during our first taste of winter weather. Living without a defroster really sucks!

-Jay

awesome DIY

i've been looking for months trying to find a DIY on getting under that wiper

there was a DIY for it on a C-class, but it was different and i couldn't get under there

thanks

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Own:
2013 C300 4matic
2009 C300 4matic

Owned:
2001 E320 Sport
1992 500E
1989 300SEL

thanks for the excellent photos and documentation.i went thru this proceedure about a month ago.my motor was squeaking and just required a little oil in the bearings.works great now

I could have tried fixing the old motor. However, considering the amount of effort involved it was well worth the $100 for a new motor to know that I shouldn't have to mess with this again for a long time. It's way too easy to break one of the plastic pieces or drop a screw somewhere you'll never find it, so I plan on staying out of there if at all possible. Besides, I can always have my old motor rebuilt and sell it on eBay.

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Jay
1998 S320

The blower motor is cleverly designed to make replacing the bearings pretty close to impossible. The whole assembly seems to be pressed and welded together, so the bearings, which are the main moving part to wear out, to be replaced.

You CAN lubricate the bearings, which is what makes these things squeak, and replace the brushes without too much difficulty.

You can test it off the car by using a 12v transformer or a battery charger. A test wiring harness can be adapted from wires you snipped off with the connectors attached at the U-Pick junkyard or perhaps scavenged from an old stereo.
I took my motor out, and tested and lubed it, but it won't turn inside the car. I wanted to use the car so I reassembled it and plugged everything in, and it sisn't work. Then the temperature went down to 40º F and it started turning for a brief, though thrilling, period.

I am assuming that I will need to replace the resistor, the aluminum heatsink gizmo that varies the fan speed.

Thanks for posting these photos. It will inspire courage in all of us.

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Semibodacious Transmogrifications a Specialty

1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

"Time flies like and arrow, yet fruit flies like a banana"
---Marx (Groucho)

I too have a squeaky fan, and your description and photos have given me the impetus to go and lubricate the bearings.

A great job - well done and thanks.

You should contact Haynes. Maybe they need a new contributor.

Barry

1994 E200 Wagon 116k miles

Great job! I did lubricate mine when I changed the evaporator. Talking about a job...

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J.H.
'86 300E

Has he moved his web sight the link does not work any longer?
Does anyone know where I can find some other pics?

Thanks,
Allan

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1973 280 - Sold
1980 300SD - Sold
1982 240D - Stolen
1988 300E - Sold
1989 260E - Sold
1989 560SEL
1994 E420 - Sold
1997 E420
2005 CL500

Yeah, we need the link! It's not working, and this is important stuff!

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Henry Bofinger
1989 560 SEL (black/black)
2001 Audi TT Roadster (silver/grey)

Definatly need the link!!!!!!!!

How can I get a look at these Pics.
The url is "unfound" for me

Many Thanks for reply

The link isn't working, I'd pay real money for these pics right about now!