Car is a 93 300D 2.5T. Built in mid 1992 as best I can tell. The blower quit awhile back and I am about ready to roast driving without air in central NC this summer.

Background: The fan would run, make noise, then peter out. Then run again another day, then same thing. So I've just not been using it. When I first noticed a problem it actually had blow the strip fuse (the 30A thin metal fuse). I replaced and it's never blown again but clearly something is shot. I tore into it today and have the blower out. A couple questions.

Questions:
I see blowers with dust filter ans w/o. I don't see any dust filter. Here's the dumb part - am I missing something does this car have a dust filter and will it matter which one I order if it doesn't? (some places have dust filter only, some only without. I'm just looking for the cheapest of the brand I want (Behr I guess) so if it offers a dust filter is that just something I can toss and use the motor and fan eitherway?

Next question. Do I need to worry about the regulator while I'm in there. When I had the box opened up before I took out the blower, I keyed up the car and hit the switch. It didn't run, but I just bumped the squirrel cage with my hand and it took off and ran. It was a bit wobbly on one side I would say but there is no play I can see, just wobbly. And it makes some rumbling noice (the same as I started hearing when the problems began) when it runs but the point for this question is the fan is running. Can I assume the regulator is fine and it's just the fan motor it crap?

Last question. The motor I pulled out doesn't seem to be OEM. It's got ACM as the make on it. Is that a replacement already? Doesn't matter just wondering. I am leaning toward buying a Behr but is that a good call, this same motor (ACM is a bit cheaper). LOL - it's failed though so again probably a dumb a** question but I have to ask!

Thanks!

The W124 series didn't get a cabin AC filter until 1994. Maybe the 500E got it earlier. It's a lot of work but only bolt on work to adapt a 94-95 cowl and ACC airbox to retrofit a filter. An outfit in Japan sells filters that fit over the cabin air intake grates astride the wiper pivot in early W124s. A filter set was $80 plus shipping 5 years ago.

I think your motor's intermittent operation is caused by worn brushes or bearings. I'd gamble that the blower controller is in good shape.

Sixto
87 300D

Thanks, I think you are right on the brushes. I looked at them closer since I made the original post. There looks to be 2 brushes. One is worn significantly more than the other and also uneven in how it contacts the armature (not sure my lingo is correct here). From what little I know, that is likely my issue. Cause, who knows but hopefully the issue and nothing with the regulator.

Also, I didn't want to upgrade to a filter, just wanted to know what to order and if the blowers w/ or w/o a filter are actually different so when I order it I get the right thing. Is there any difference in the actual blowers?

Blowers with and without filter are different so choose accordingly. Make sure you're aware of URO brand's reputation before you buy on price.

Blower motors are available with and without cages. No brainer for a 126. For a 124, it's really difficult to get the cages off the old motor.

Sixto
87 300D