C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Little knob top center by windshield?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old May 28, 2010 | 11:58 PM
  #1  
noka's Avatar
Thread Starter
MBWorld Fanatic!
20 Year Member
 
Joined: Aug 2004
Posts: 1,367
Likes: 3
From: MA
'24 Porsche Macan
Little knob top center by windshield?

What's the little half-round knob on top of the dash in the center by the windshield? Some type of sensor?

Also, what's under the center grate where that knob is and also under the two outer grates flanking it on left and right? Speaker(s)?
Reply
Old May 29, 2010 | 01:36 AM
  #2  
blue00r6's Avatar
Super Member
 
Joined: Apr 2010
Posts: 770
Likes: 9
2017 C43
ambient light sensor eh?

not sure about the center grate knob question... I'd have to look
Reply
Old May 29, 2010 | 06:01 AM
  #3  
08w204's Avatar
Member
 
Joined: Sep 2008
Posts: 145
Likes: 0
From: Waldfischbach-Bergalben, Germany
2008 MB C300 Sport (Mars Red)
Originally Posted by noka
What's the little half-round knob on top of the dash in the center by the windshield? Some type of sensor?

Also, what's under the center grate where that knob is and also under the two outer grates flanking it on left and right? Speaker(s)?
That's not a knob... It's a light sensor. Don't cover it up!

There is a speaker under the center grille and the two that flank it are the air vents for the windshield defogger.
Reply
Old May 29, 2010 | 09:20 AM
  #4  
noka's Avatar
Thread Starter
MBWorld Fanatic!
20 Year Member
 
Joined: Aug 2004
Posts: 1,367
Likes: 3
From: MA
'24 Porsche Macan
Originally Posted by 08w204
That's not a knob... It's a light sensor. Don't cover it up!...
Thanks. I wasn't planning on covering it up,...just removing it.
j/k
Seriously. Would that light sensor be for: a) automatic headlights, b) auto-dimming mirrors, c) neither one, d) something else?

Last edited by noka; May 29, 2010 at 11:37 AM.
Reply
Old May 29, 2010 | 09:32 AM
  #5  
AkaSigFreak's Avatar
MBWorld Fanatic!
 
Joined: Dec 2007
Posts: 3,056
Likes: 47
From: Orlando, Florida
E350 Sport/ML350RWD
Little bit of advice: If you don't know what it is-leave it the hell alone.
Why were you planning on "removing" it?
Reply
Old May 29, 2010 | 09:48 AM
  #6  
Sathinas's Avatar
Banned
 
Joined: May 2010
Posts: 1,209
Likes: 188
S65
Auto Lights and Sun intensity for the HVAC, I think.

Auto Dimming mirrors run off the inside mirror's light sensor.
Reply
Old May 29, 2010 | 11:39 AM
  #7  
noka's Avatar
Thread Starter
MBWorld Fanatic!
20 Year Member
 
Joined: Aug 2004
Posts: 1,367
Likes: 3
From: MA
'24 Porsche Macan
Originally Posted by AkaSigFreak
Little bit of advice: If you don't know what it is-leave it the hell alone.
Why were you planning on "removing" it?
I added j/k to my post in case the big grin did not convey that.
Thanks for the advice though.
Reply
Old May 29, 2010 | 04:56 PM
  #8  
joshg1001's Avatar
MBWorld Fanatic!
 
Joined: Jun 2008
Posts: 2,073
Likes: 85
From: San Francisco, CA
2017 E300
I would think for the headlights only. is our hvac system that advanced to take the sun into consideration?
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old May 29, 2010 | 08:08 PM
  #9  
Sathinas's Avatar
Banned
 
Joined: May 2010
Posts: 1,209
Likes: 188
S65
Don't know...

On mine, when I've got the sun in front and it's warm, the A/C and/or fan changes in intensity over say, the sun not beating down on me from the front.
Reply
Old May 30, 2010 | 08:57 AM
  #10  
AkaSigFreak's Avatar
MBWorld Fanatic!
 
Joined: Dec 2007
Posts: 3,056
Likes: 47
From: Orlando, Florida
E350 Sport/ML350RWD
Originally Posted by noka
I added j/k to my post in case the big grin did not convey that.
Thanks for the advice though.
Sorry. I'm not up to speed on the textlish.
Reply
Old May 30, 2010 | 04:04 PM
  #11  
noka's Avatar
Thread Starter
MBWorld Fanatic!
20 Year Member
 
Joined: Aug 2004
Posts: 1,367
Likes: 3
From: MA
'24 Porsche Macan
Originally Posted by AkaSigFreak
Sorry. I'm not up to speed on the textlish.
just/kidding
Reply
Old May 30, 2010 | 08:39 PM
  #12  
AkaSigFreak's Avatar
MBWorld Fanatic!
 
Joined: Dec 2007
Posts: 3,056
Likes: 47
From: Orlando, Florida
E350 Sport/ML350RWD
Originally Posted by noka
just/kidding
OMG
LMFAO
BFF
JAFO
FUBAR
Am I getting better?
Reply
Old May 30, 2010 | 08:51 PM
  #13  
HenryJr's Avatar
Junior Member
 
Joined: May 2010
Posts: 23
Likes: 0
From: New Orleans, LA
2009 C300 Sport
Originally Posted by AkaSigFreak
OMG
LMFAO
BFF
JAFO
FUBAR
Am I getting better?
TMI IMHO LOL
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 12:16 AM.

story-0
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-1
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-2
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-3
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-4
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
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE