Sorry to say that your car probably has the early climate-control system with the servo unit on the firewall--an ill-conceived contraption that brings coolant into proximity with current. They crack, they leak, they corrode. They're also costly to replace. See http://www.thepartsbin.com/mercedes-ac-servo.html

I'm happy to say I have no direct experience with them. But it's on the Fuse 10 circuit, I believe -- I'd look there rather than the blower motor to find out why it's blowing. Unplug the servo and see if any fuses melt.

Good luck --

Wow. Your're not kidding when you say costly. And a 100% failure rate ! That unit or one that looks exactly like it is by my air cleaner by the right (right is right when sitting in drivers seat right? ) front tire well.

I believe it is on the same circuit. From a Haynes wiring diag. The Red wire from blower motor goes to a (numbered 82) Vacuum switch, 175 mbar, master swich . And from there , a green and yellow wire goes to (numbered 71) Servo assembly, automatic climate control.

Thanks. I will give it a go on my lunch break.



Thanks

I'd like to see the pics if you do. Mine's chirping and lubing it up didn't last longer than a day. I'm hoping I just need to replace the brushes.

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B
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1983 300SD

i bought the brush kit and manual from **************. now since the kid has not , um, how should i say this, not felt the need for heat or set aside the time to get the work done, he is on his own until spring.

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currently
[1981 300 td tdidi 165500 dark brown/palamino-Brownie-mine-3k miles of ownership
1983 240d 162+++ Anthricite grey w/ henna red interior and hella lights-wifes car-Red

the above two cars are for sale
and can be seen on the cars for sale thread here. pix also available.


240d-144+ Manilla Yellow w/ palmino interior-greasecar kit-Blondie-the college kids car

23" gt 21 speed still on original tires-still got the nubs
21" khs tandem

Hee Hee. Too funny.

Regarding my blown fuses., I unplugged the servo and it still blows fuses. I got one a junk yard for $20 just in case. I have not had a chance to unplug the fan again.

he has not had any problems with the fan motor this winter and we have had some cold days. so i wait.....................................

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currently
[1981 300 td tdidi 165500 dark brown/palamino-Brownie-mine-3k miles of ownership
1983 240d 162+++ Anthricite grey w/ henna red interior and hella lights-wifes car-Red

the above two cars are for sale
and can be seen on the cars for sale thread here. pix also available.


240d-144+ Manilla Yellow w/ palmino interior-greasecar kit-Blondie-the college kids car

23" gt 21 speed still on original tires-still got the nubs
21" khs tandem

The few times I've taken my car out this winter, I haven't had any problems either. Fixed itself.

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B
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1983 300SD

Replaced with one from pullapart i got for $15.00 . Works good now. No blown fuse. Now i can refurbish my old one when i get around to it.

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What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

How long did it take to take timewise to get to the motor? and how long did it take altogether to finish the job? i imagine putting things together was probably faster than taking them apart?

I just got an used motor and plan to embark in this replacement task. However we also have 30% chance of rain this upcoming weekend, so i want to somewhat lol plan my day.

Thanks

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89 300E - 240k +