Air temp fan in dome light assy
Thread Starter
Super Member
Joined: Aug 2012
Posts: 650
Likes: 20
From: Alabama
09 Carrera S, , 03 F250 CC FX4
Air temp fan in dome light assy (UPDATED with disassembly pics)
Has anyone cleaned this? Mine started making a noise today and from I have read it appears a good cleaning needs to be done as the cars get older.
Anyways, I haven't found a good write up or video on a proper way to do this.
Anyways, I haven't found a good write up or video on a proper way to do this.
Last edited by QWKSNKE; Mar 16, 2016 at 08:50 PM.
MBWorld Fanatic!
Joined: Feb 2007
Posts: 1,308
Likes: 80
From: Houston - Clear Lake
C63 coupe, Z3M Roadster garage queen
Super Member
Joined: Mar 2009
Posts: 657
Likes: 119
From: Boston
2020 E63s Wagon, 2012 C63 AMG Coupe, 1989 560SL, 2023 911 Carrera T
Thread Starter
Super Member
Joined: Aug 2012
Posts: 650
Likes: 20
From: Alabama
09 Carrera S, , 03 F250 CC FX4
Yeah I never knew there was one in their either until searching the net yesterday on what the noise was I was hearing.
If you look towards the front of the dome light assy you will see the holes that kinda looks like a speaker cover. This is the inlet for the fan that pulls in air to the sensor that measures the temp of cabin air to run the climate control system.
If I don't pull it down this evening, I will tomorrow and post pics of disassembly and cleaning.
If you look towards the front of the dome light assy you will see the holes that kinda looks like a speaker cover. This is the inlet for the fan that pulls in air to the sensor that measures the temp of cabin air to run the climate control system.
If I don't pull it down this evening, I will tomorrow and post pics of disassembly and cleaning.
Thread Starter
Super Member
Joined: Aug 2012
Posts: 650
Likes: 20
From: Alabama
09 Carrera S, , 03 F250 CC FX4
ok. So I went ahead and disassembled the light this evening. AND I was incorrect on the placement of the fan (or air sniffer as some call it) On the W204 it is at the rear of the dome light assy. not at the front like earlier model platforms.
Also, based off an experience I went through last year when the headliner was removed, I advise that you DO NOT turn on the ignition at any time while the dome light assy is unplugged. This could lead you to needing a STAR program reset.
Before getting into pic definitions, the purpose of this disassembly is to expose the fan where you can hit it with low pressure air and/or q-tip with alcohol for cleaning.
See this video for dome light removal
PIC 1- This is a connector I could not get unplugged for complete removal. Lets call this the P.I.A connector
PIC 2 - Back of dome light assy
PIC 3 - Green Arrows pointing to all screws to be removed. Red arrows reflect special notes.
PIC 4 - This is the dome light assy with the back and circuit card removed..Green arrow points to fan inlet
PIC 5 thru 7 - Various shots of the fan motor on the CCA. Notice all the crud. You might be able to see a dead bug in one of the pics. There was one there that I suspect may have caused the noise I heard yesterday before flying out of the fan.
I did not take pics of the connectors that should be unplugged. IT is assumed that anyone taking on this task has enough sense to unplug them
Also, based off an experience I went through last year when the headliner was removed, I advise that you DO NOT turn on the ignition at any time while the dome light assy is unplugged. This could lead you to needing a STAR program reset.
Before getting into pic definitions, the purpose of this disassembly is to expose the fan where you can hit it with low pressure air and/or q-tip with alcohol for cleaning.
See this video for dome light removal
PIC 1- This is a connector I could not get unplugged for complete removal. Lets call this the P.I.A connector
PIC 2 - Back of dome light assy
PIC 3 - Green Arrows pointing to all screws to be removed. Red arrows reflect special notes.
PIC 4 - This is the dome light assy with the back and circuit card removed..Green arrow points to fan inlet
PIC 5 thru 7 - Various shots of the fan motor on the CCA. Notice all the crud. You might be able to see a dead bug in one of the pics. There was one there that I suspect may have caused the noise I heard yesterday before flying out of the fan.
I did not take pics of the connectors that should be unplugged. IT is assumed that anyone taking on this task has enough sense to unplug them
Last edited by QWKSNKE; Mar 16, 2016 at 10:51 PM.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
Super Member
Joined: Aug 2012
Posts: 650
Likes: 20
From: Alabama
09 Carrera S, , 03 F250 CC FX4
