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S560 AC Vent Issues

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Old Sep 5, 2020 | 06:10 PM
  #1  
merclux's Avatar
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2018 S560 & 2002 ML320
S560 AC Vent Issues

Hi Everyone,

I have a 2018 S560. Had the vehicle for a while now, but just noticed that one of my AC Vents (Rightmost, Center) is blowing out less air than the other vents. (See Pic For Reference).
Already went into climate settings and toggled between diffuse, focus, etc. Same issue.
Took it to the dealership, and they compared it to another S-Class on the lot. Service Tech mentioned the vehicle on the lot also blows out less air in one of the vents. He mentioned it may be due to factory routing of the ducts? Said there is no remedy.

Just curious, and wanted to take a poll. Anybody else have this issue with their S-Classes?



Blows Out Less Air When Compared to The Other Vents. (Very Subtle)
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Old Sep 5, 2020 | 08:41 PM
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Todd in PA's Avatar
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2020 S560, same as ours, less air flow out of this vent.
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Old Sep 6, 2020 | 08:55 AM
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Does the airflow change if someone is sitting in the passenger seat? Some AC systems recognize when a seat is occupied or not and adjusts airflow accordingly...
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Old Sep 6, 2020 | 11:39 AM
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Originally Posted by merclux
Service Tech mentioned the vehicle on the lot also blows out less air in one of the vents. He mentioned it may be due to factory routing of the ducts?
Air flows from central air duct AC housing distributor into central air duct through air vents. If anything it may be isolated to flawed right central air vent (30 in diagram) part # 22283008542A17.





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Old Sep 6, 2020 | 12:14 PM
  #5  
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Originally Posted by SilberGrau57
Does the airflow change if someone is sitting in the passenger seat? Some AC systems recognize when a seat is occupied or not and adjusts airflow accordingly...
My wife sitting in the passenger seat noticed it.

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Old Sep 9, 2020 | 04:28 AM
  #6  
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Originally Posted by SilberGrau57
Does the airflow change if someone is sitting in the passenger seat? Some AC systems recognize when a seat is occupied or not and adjusts airflow accordingly...

My wife was a passenger and was the one who pointed out the issue to me.
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Old Sep 9, 2020 | 04:36 AM
  #7  
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Very interesting! I also think it is caused by a flawed air vent. However, despite others in the post such as @Todd in PA sharing that they have a similar issue, I am not sure how else to proceed since I was told that other S-Classes on the lot exhibit the same reduced air flow from the center right vent.

How does one escalate this to a point where it becomes a campaign remedy?

Last edited by merclux; Sep 9, 2020 at 04:40 AM.
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Old Sep 9, 2020 | 12:15 PM
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Originally Posted by merclux
How does one escalate this to a point where it becomes a campaign remedy?
Everyone experiencing this needs to tell their dealer to submit a PTSS case.



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Old Sep 9, 2020 | 04:37 PM
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We are OK with the slightly diminished airflow.
I hate it when the techs start pulling stuff out of the car to fix things.
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Old Sep 20, 2020 | 08:51 PM
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My 2016 S550 does the exact same thing.
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Old Sep 20, 2020 | 11:26 PM
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From: 2000 ft over the FL coast in a B-17
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both my 16 and 17 550 coupes had some vents stronger than others when all fully open
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