E-Class (W211) 2003-2009

Climate control behavior and humidity sensor

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Mar 20, 2023 | 02:33 PM
  #1  
gogydm's Avatar
Thread Starter
Member
10 Year Member
Liked
 
Joined: May 2012
Posts: 113
Likes: 24
From: Orange County, CA
08 E350
Climate control behavior and humidity sensor

Hello all,

The other night while driving in the rain I had my AC on, auto air direction but fan level 2 selected. The same temperature setting was selected to both driver and passenger side (I have the facelift two zone climate control). The vents directed for the passenger were blowing colder than the driver's side and it was the same with the ones in the rear, one was colder than the other. Is that the normal behavior when alone in the car? I tried playing with the setting and the temperature does change. One thing I've also noticed is that sometimes the center vents are colder than the ones closer to the doors.

I will go get the pressures checked since I haven't done that since I got the car. I know there is a TSB for these newer cars to get a humidity sensor fitted, but I don't have the cutout for it. Can some assist me with what's going on? My VIN is WDBUF56X98B249090

Thank you in advance.
Reply
Old Mar 20, 2023 | 02:48 PM
  #2  
konigstiger's Avatar
Out Of Control!!
 
Joined: Jul 2003
Posts: 15,901
Likes: 4,633
From: North Scottsdale, AZ
'71 Pinto
Originally Posted by gogydm
I know there is a TSB for these newer cars to get a humidity sensor fitted, but I don't have the cutout for it.
Interesting, EPC shows VIN as equipped with sensor. Anyway I agree check refrigerant level.




Attached Files
File Type: pdf
83.00_102.pdf (80.0 KB, 120 views)
File Type: pdf
WDBUF56X98B249090.pdf (754.3 KB, 154 views)
Reply
Old Mar 20, 2023 | 03:45 PM
  #3  
gogydm's Avatar
Thread Starter
Member
10 Year Member
Liked
 
Joined: May 2012
Posts: 113
Likes: 24
From: Orange County, CA
08 E350
Thanks for the quick reply. I am looking in the cabin air filter box and it’s not there. Is there anywhere else I’d need to check? I know that the 4 zone cars have a fancier sensor but my car shouldn’t have that. I am
thinking of firing up Xentry and checking if I have a reading for humidity.
Reply
Old Mar 20, 2023 | 04:45 PM
  #4  
konigstiger's Avatar
Out Of Control!!
 
Joined: Jul 2003
Posts: 15,901
Likes: 4,633
From: North Scottsdale, AZ
'71 Pinto
Even MBUSA EPC sometimes is wrong best to check with Xentry. Again, may be as simple as refrigerant level.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 10:26 PM.

story-0
8 Oddball Mercedes Ideas That Actually Made it to Production

Slideshow: Mercedes has never been afraid to experiment, and some of its strangest ideas turned out to be surprisingly successful.

By Verdad Gallardo | 2026-06-10 17:43:40


VIEW MORE
story-1
Dubai Tuner Gives the Mercedes G-Class An Entirely New Look

Sideshow: A Middle Eastern tuner has transformed the Mercedes-AMG G 63 into an open-top special, replacing nearly every exterior panel in the process.

By Verdad Gallardo | 2026-06-10 15:29:50


VIEW MORE
story-2
Six Gift Ideas Your AMG Loving Dad or Grad Will Cherish

Slideshow: Six gift ideas your AMG loving dad or grad will cherish.

By | 2026-06-03 17:26:18


VIEW MORE
story-3
7 Craziest Things AMG Gas Ever Built

Slideshow: Sometimes AMG builds fast sedans. Other times, it builds twin-turbo V12 land missiles and six-wheeled off-road monsters.

By Verdad Gallardo | 2026-05-26 17:59:58


VIEW MORE
story-4
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-5
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-6
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-7
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-8
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-9
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE