How to fix a 2000-2006 S500 Mercedes W220 AC Blower 

Great video! Thank you so much! And very helpful on the tip to hold the 2 buttons to get the errors. I had codes 1451 through 1463. I ran some tests. The fuse was fine. So then I took the unit out and started with replacing the regulator. That worked. The blower worked fine. The blower was not seized so I reused it. So much knowledge on these cars which makes them a good buy for DIY folks. I got the same story, dealer wanted $1400. I paid $98 for that same regulator you have. I saved $1298. Thanks again.

With this, the old S500 just keeps on going. Thanks.

See this is the type of tutorial that keeps a car on the road instead of selling it for no reason, thank you!

I just want to say thank you for taking the time to post this tutorial. Especially the part purchase info. I also want to wish you a blessed day/ life🙏

Just finished installing the A/C blower resistor (regulator) on my 2004 CL500 and it worked. Thank you for your the instructions.

Thanks my man! my mother in laws drain clogged and poured water inside, now the AC is on the fritz. Time to strip it down and diagnose

Great explanation and tips. Exactly what I was looking for.

Awesome awesome video, super informational. I’ve been having the same issue with my blower that just started acting up this week. Appreciate you, God bless!

Excellent advice and excellent fault finding skills, 😊.

agree excellent video, so good i am going to attempt it myself. great job explaining how this all works. my guy wanted a $1000 to fix it. again thanks for taking the time to do this

Thank you very much Just saved around 800 Was the fuze 33 👍👍👍👍👍👍👍👍👍👍

I have the same car same year. My blower won’t blow no air just like yours I will start diagnosing thank you

Great video man. Great diagnosis ✊🏽✊🏽

Thanks! I was able to diagnose my bad blower motor. Regulator was ok still ok. My regulator was pushing 12v even with fan on low, but with the new blower off eBay it works perfectly.

Very detailed information speak very well thank you for that information keep doing videos

Thanks for the video!

Thanks for the information I appreciate this video my brother

Excellent video brother watching this reminds me of why Mercedes paid someone a million dollars for their car In hopes that more people will take their car to the dealership rather than watch a simple video.

thanks man great video. youtube is awesome.

Good Information!

great video my blower went out last week hottest day of the summer I thought Parks Geeks was cheap 200. ordered one from eBay $68 three days later got it in colder than polar bear toes very nice video...lol

Thanks my guy big time help!

Very good video!!

Good video need to do more like this

great video and advice .......

Helped me with my cl55 too bro thank

I just work on my E240 here in Panama. Blower starts or not depending of it’s mood. Ordered a blower & regulator at Amazon for $88 brand new. I know my blower works but for the price I couldn’t resist. Only blower are around $40-$60. Regulator was $70 to $114 separate. So if my blower goes I still have a replacement part in the garage.

great video...

Nice sharing my friend

Hey Guys, just an FYI, Fuse 33 sends a live positive directly to the blower regulator then from there, the fan gets fed from the regulator. Thanks for watching.

On the ac control panel where it says ac off the light was stuck until I reset it and it turned off then the ac made a noise like it was turning on but it still doesn’t throw cold air

Hi I have s500 model 2001 w220 miles are 127000 with good serice recored. The only issue I am facing is ac blow cold from central vents and both driver passage and back sent vents through warm air. What can be the issue. I checked freon it’s good. Can you help help in this.

Thanks!

nice ... thnx

Hi there does this go for if the heat is not blowing also right? the blower works for air and heat? Thank you in advance so much!

Thank you for the video. My 06 S55 the blower doesn’t come on. I volt test and I’m not getting any power on the din connector from the instrument panel to the regulator? Check fuse are ok. But can’t get any volts from the panel going to the regulator ? No red light I replaced the compress and is holed the charger but a week later the blower stop working. I ordered a regulator and a blower to install but when I tested the den connectors I’m not getting any power from the panel? So I’m guessing that means I have a bad climate control panel? Any advice would be helpful thank you

My 2004 s430 4matic a/c will blow at times sometime it doesn't I think its the blower because I can feel cold air but its not blowing is it the blower or resistor plz help me thank you

Thanks

That red ac light is when you turn off the compressor so you just vent air

Hi dear, I have a 2004 CL500, how do I reset the AC system, I seen that red light is lit on the AC button?

Thank you for the great video....Do you happen to have the part number for the part you replace? Thanks

Peter hi, great video step by step instructions. Really appreciate you taking the time to show us. My MB is an S430, and my AC Blower isn't blowing. I've replaced the blower, the regulator (bought online, also got a cheap set from the JY that didn't work either). Reset the computer as per another site after replacing the blower. Replaced fuses 33, 4, and 7 as different websites were conflicting - I had extras already so it was no issue. Still nothing - blower isn't blowing. Any ideas my friend?

Would this possibly cause my AC to fail intermittently? I have a 2005 s55 AMG. Front air only.

Hi, can you buy after market parts for this job if they match up to the pats you pull out, thanks P

So I have the exact same issue, head unit works, fuse is good, blower motor spins when 12V applied. I checked the voltage coming out of head unit to the regulator and got a positive 12V across the thick gauge wire and got 2V to 6V on the smaller gauge wire (to ground) when I ran the fan from lowest to highest setting. Output from the regulator was 0. Output from a replacement new regulator was 0. Can you tell tell me what the full input range was to the regulator depending on fan setting? My guess is that the head unit isn't putting out a high enough control voltage to the MOSFET. Also, I've got an S600 "AMG" (2005) with the rear control and my harness only had three wires, just like yours. I should add that the rear control works just fine, so in my case, I believe there is an additional MOSFET regulator in the center console. Lastly it also intermittent. Mostly non-functional, but occasionally it will come on. Oh and ZERO diagnostic codes in the HVAC computer. - UPDATE: I found a shop manual page and the correct output voltage from the head unit ranges from 0-6V providing a 0-12V regulated output, so at least the head unit seems ok.

thank you so much,,, really challenging figuring this out,,, had your address I'd send case of your fav beer!!!

Hello, so I have a 2000 s50 box is w220 and my battery keeps getting drained then completely flat so I have to buy a new one. I noticed that when I would turn off my car and take out the key, the blower for the back two seat kept making noises, could that be the issue of my battery drain?

Great vid .... Thanks !

I just replaced my regulator on my 2004 s430 4matic,second time I did this results were worked for a couple days,stop working got in car yesterday and it was working now today not working but I notice when I'm driving and gas the car I feel cool air coming thru the vents but not blowing what can that be .....thanks

I have just diagnosed my car and I am not getting any power to the din connector that comes from the command unit. Could the climate control module be faulty? Why would the connector be dead? Any help would be appreciated.

This is awesome info!! Would this be the same for a 2004 S430? Mine comes and goes both A/C and heat are fine but the fan just shuts off for awhile then turns back on full blast whenever it wants to. After watching your video I am inclined to think it’s the blower module rather than the fan itself. Also if you think that’s the route I should take, what is the part number I need to replace mine? Thanks so much, Jonathan

My 2006 S500 keeps blowing the 78 fuse. Any thoughts? Anyone? Subscribed...

Thanks for your great video! i have to replace my temperature sensor (error 1229) and i saw your video and i guess you told that wire left of blower is where it connect, am i right? help me please! best regards

I need a reference on where you got the oem part.made i. Germany.

My will blower will not start sometime, if I hit under the dash with my hand where the blower is it will start working

A/c light on. Error codes: 1256,1453,1455,1463. What are these?

Ok I did everything that you did. I found that I wasn't getting power from the climate control unit so I bought one and bought a new resistor like yours there. A.c. still doesn't want to come on. A.c. system is charged. AC compressor is working cause ac line is cold. Blower motor works. Hooked it to a 12 volt source. Any ideas?

What if it doesn’t give you a code it just says diagnostic error when you hold the rest button

Mine works when it wants to work like it will work one week and the next it won’t work can you explain this I had a error code 1000 what is that

The DYI going ok ?

my 2000 s500 benze the blower went out i replaced the climate controll and blower module still no blower i put duwalt 14 v battery to the blower works so im going to buy pass it next.. tge blower has alot of calcium deposit i tried every thing on your video

Where is the fuse for the blower I have a s430 2003

Thanks for the great video. My blower comes on and off intermittently. I know the compressor is working because I can feel the cool air (static) when I put my hand on the vent. Its just the blower is not throwing that cool air into the cabin. Is it safe to say that it is the regulator or blower?

2 screws are giving you a hard time????

Fuse 33 is the motor fan

did you notice the regulator gets real hot?

But my heat isn't working

Are located in New York

BTW is was aftermarket

My error code was 1257

Wrong wrong wrong you are not a technician