Zerocarpileup

On my 2007 s550. As of lately I have been having problems with my blower motor. Just my luck as my warranty just expired. My blower motor doesn't always kick on when I need it to. Sometimes when it doesn't want to cooperate a good bump in the road will turn it on. Sometimes if I shut it off and try to turn it back on I encounter the same problem. Very frustrating in this cold Chicago weather.

Has anyone experience this or have a quick fix? Im sure I should visit the dealer. Im sure its starting to "crap out". But if someone has experienced this and can save me the trouble of looking for a new motor, I would greatly appreciate it.

johnyg

Mine was doing this also intermittently and just took it in and asked when car was being serviced. Dealer said a code was stored for low voltage or something and said it was a fault related the the blower relay. He ordered a relay and I am having it put in next Fri. Total should be around 600 bucks. I will let you know if it works. Thank goodness it was not the blowere motor itself as he said that is a ton more labor to get to. Relay is located behind glove box.

Zerocarpileup

Great please let me know the outcome. That seems kind of pricey to be quite honest. Ive changed out blower motor resistors in csrs before for a fraction of that price. Im sure most of that is service. Please find out the price of the resistor for me also. Thanks in advance.

new550

I have removed the blower assy and cleaned/lubricated the fan couple years ago (2007 4matic)...the blower resistor and motor are time consuming to get to, but not that difficult to remove....if you look under the glovebox on toward the passenger door side, you can see the blower assy housing. Remove several torx screws (4 or 5?) and the unit comes out...the one farthest to the outside is a pain to get to, but once you get the torx driver into the head of the screw, no issue.....remove the screws, disconnect the electrical connector and you're there....I searched on google and found a link with photos, but its been too long to remember which site I found it....if you are feeling brave, it can be done...my guess is the labor cost drives the $600, not the motor or resistor cost....not a high risk DYI.


Just my 2 cents...

Zerocarpileup

What drove you to remove and clean up the motor in the first place? Were you having the same type of symptoms we're having? If so did performing that solve the issue?

new550

No, the symptom I had was a squealing noise at low blower setting....likely due to water from clogged windshield drain....try this link for pdf for procedure...


https://mbworld.org/forums/s-class-w...procedure.html


Good luck!

bvlaw

I had EXACT same symptoms as original post. Eventually, the blower stopped working. I just paid $984 to have the dealer replace the blower motor.

While my car has 95,000 miles, I called MB Customer Care to complain, as I have read many articles on the internet about other owners with similar failures. The MB Customer Care rep won't return my phone calls.

I don't expect a vehicle to be perfect, but when I read about many other owners having similar problems on a $100,000 car, that's an unacceptable design defect and MB should have picked up part of the cost of the repair if they ever hope to have my future business.

Saul Ongalo

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Saul Ongalo

I changed the Climate Control ECU and my problem was sorted. Previously I had changed the blower resistor...so I would recommend the same .