2012 Bluetec Blower motor from intermittent to complete dead
Thread Starter
Junior Member
Joined: Aug 2017
Posts: 21
Likes: 3
2011 C300
2012 Bluetec Blower motor from intermittent to complete dead
I have a crummy issue, especially now that summer is upon us. I was driving from SoCal to NorCal and stopped at a rest stop to take my dog out for a minute. I get back in, turn on the A/C and the fans wouldn't turn on. It was 98 degrees so was a bit upset.
I pulled over, turned off the car, started it back up and the fans turned on without issue. It ran fine for a couple of weeks, and now the blower just won't turn on at all. I don't think there is an issue with the A/C though, only the blower since it won't turn on even without the A/C on.
I see that a fuse for it is not in the box under the hood, or under the right passenger back seat. Does anyone here no where the fuse(s) for it are? I'm also wondering if it's something else since when a fuse is blown, it's blown. Meaning, it would not have turned on again like it did the 1st time I restarted the car.
Has anyone here had something like this happen? I don't mind replacing the blower motor myself, I just need to diagnose WHERE the problem is to begin with so figured I'd start from the fuse and go from there.
I read someone had a wire that melted or something? I'm pretty good with working on cars, especially electrical.
ANY help whatsoever would be GREATLY GREATLY appreciated!
I pulled over, turned off the car, started it back up and the fans turned on without issue. It ran fine for a couple of weeks, and now the blower just won't turn on at all. I don't think there is an issue with the A/C though, only the blower since it won't turn on even without the A/C on.
I see that a fuse for it is not in the box under the hood, or under the right passenger back seat. Does anyone here no where the fuse(s) for it are? I'm also wondering if it's something else since when a fuse is blown, it's blown. Meaning, it would not have turned on again like it did the 1st time I restarted the car.
Has anyone here had something like this happen? I don't mind replacing the blower motor myself, I just need to diagnose WHERE the problem is to begin with so figured I'd start from the fuse and go from there.
I read someone had a wire that melted or something? I'm pretty good with working on cars, especially electrical.
ANY help whatsoever would be GREATLY GREATLY appreciated!
Senior Member
Joined: Jul 2017
Posts: 487
Likes: 114
From: DFW, TX
Ml350 bluetec
Take a look at this: http://www.mercedesmedic.com/fuse-m-...00-550-63-amg/
MBWorld Fanatic!
Joined: Oct 2009
Posts: 7,001
Likes: 2,195
From: Colorado
'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
There's an online version, a CD that came with your car, and it should be downloaded to your Command system so you can search by key word or topic.
It sounds like you are frustrated by your car. They are a lot more complicated than your "car stereo days," but take a deep breath and don't let a fuse compartment bamboozle you!
Super Member
Joined: Sep 2018
Posts: 706
Likes: 114
From: Los Angeles, CA
'22 GLE 350 | '15 ML250 | '87 560SL | '19 GLC 300 | '12 C250 (sold) | '02 ML500 | '98 C230
I have a crummy issue, especially now that summer is upon us. I was driving from SoCal to NorCal and stopped at a rest stop to take my dog out for a minute. I get back in, turn on the A/C and the fans wouldn't turn on. It was 98 degrees so was a bit upset.
I pulled over, turned off the car, started it back up and the fans turned on without issue. It ran fine for a couple of weeks, and now the blower just won't turn on at all. I don't think there is an issue with the A/C though, only the blower since it won't turn on even without the A/C on.
I see that a fuse for it is not in the box under the hood, or under the right passenger back seat. Does anyone here no where the fuse(s) for it are? I'm also wondering if it's something else since when a fuse is blown, it's blown. Meaning, it would not have turned on again like it did the 1st time I restarted the car.
Has anyone here had something like this happen? I don't mind replacing the blower motor myself, I just need to diagnose WHERE the problem is to begin with so figured I'd start from the fuse and go from there.
I read someone had a wire that melted or something? I'm pretty good with working on cars, especially electrical.
ANY help whatsoever would be GREATLY GREATLY appreciated!
I pulled over, turned off the car, started it back up and the fans turned on without issue. It ran fine for a couple of weeks, and now the blower just won't turn on at all. I don't think there is an issue with the A/C though, only the blower since it won't turn on even without the A/C on.
I see that a fuse for it is not in the box under the hood, or under the right passenger back seat. Does anyone here no where the fuse(s) for it are? I'm also wondering if it's something else since when a fuse is blown, it's blown. Meaning, it would not have turned on again like it did the 1st time I restarted the car.
Has anyone here had something like this happen? I don't mind replacing the blower motor myself, I just need to diagnose WHERE the problem is to begin with so figured I'd start from the fuse and go from there.
I read someone had a wire that melted or something? I'm pretty good with working on cars, especially electrical.
ANY help whatsoever would be GREATLY GREATLY appreciated!
Thread Starter
Junior Member
Joined: Aug 2017
Posts: 21
Likes: 3
2011 C300
That they are. My previous 2 cars were Mercedes so I'm very aware of that. I'm not frustrated with the car though. It's been great. I was frustrated with the dealer though. Paying them to tell me what I told them in the beginning. Must have been a disconnect between my service handler and the technician. I mostly came here to see if this is a common occurrence at this age...either the blower dying or wire melting or whatever.
Thread Starter
Junior Member
Joined: Aug 2017
Posts: 21
Likes: 3
2011 C300
Just to bring this one back to hopefully a close...I had the dealership take a look for free since it went completely dead while having the recall work done...and they said the Blower Motor Regulator went out.
$900 to repair, though I found the part on Amazon for $45.00 and will be doing it myself.
I'll will report back if/when this repairs it.
Thanks everyone.
$900 to repair, though I found the part on Amazon for $45.00 and will be doing it myself.
I'll will report back if/when this repairs it.
Thanks everyone.
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Thread Starter
Junior Member
Joined: Aug 2017
Posts: 21
Likes: 3
2011 C300
Okay, I got this fixed and the Mercedes Dealership was absolutely wrong....they even knew they were wrong which pisses me off.
Anyway, while waiting for the part, I did more research and found there was a TSB issued for the problem I was having. Why did they not tell me this and instead quote me for a part I didn't need.
It's the 'wire melting' I mentioned earlier. So I pulled up the carpet and found mine having this same issue.
There was a hole melted in the wire harness and the wire wasn't sitting in it properly. Thing is, when they did the inspection, they placed this faulty wire back into the incorrect harness slot.
So they were going to charge me close to $2,000 to swap a regulator??
All I did was resplice the wire and the issue was fixed. Completely free.
Here is a video someone else made on it:
Anyway, while waiting for the part, I did more research and found there was a TSB issued for the problem I was having. Why did they not tell me this and instead quote me for a part I didn't need.
It's the 'wire melting' I mentioned earlier. So I pulled up the carpet and found mine having this same issue.
There was a hole melted in the wire harness and the wire wasn't sitting in it properly. Thing is, when they did the inspection, they placed this faulty wire back into the incorrect harness slot.
So they were going to charge me close to $2,000 to swap a regulator??
All I did was resplice the wire and the issue was fixed. Completely free.
Here is a video someone else made on it:
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