Ambient air temp sensor harness- how to replace?
Thread Starter
Senior Member
Joined: Mar 2004
Posts: 264
Likes: 3
From: OKC, OK
2022 GLE 450;
Ambient air temp sensor harness- how to replace?
I searched all through the forums but mainly find threads about 'where do I find it'.
In my case, it's ripped off and all I have is a hanging bare wire. I purchased all the replacement parts needed (or at least all the parts my dealer said I needed) but the short harness that the sensor plugs into looks like it's designed to plug into the bare wire thats hanging and I don't have a plug there. Am I missing a plug piece or need to splice it in some way or what? A writeup or exploded view diagram would be helpful. Thanks
2006 C230
In my case, it's ripped off and all I have is a hanging bare wire. I purchased all the replacement parts needed (or at least all the parts my dealer said I needed) but the short harness that the sensor plugs into looks like it's designed to plug into the bare wire thats hanging and I don't have a plug there. Am I missing a plug piece or need to splice it in some way or what? A writeup or exploded view diagram would be helpful. Thanks
2006 C230
MBWorld Fanatic!
Joined: Sep 2005
Posts: 6,192
Likes: 242
From: Albuquerque
'10 CL550, '12 GL550
Most of the time Mercedes catalogs replacement plugs, connectors, etc. to facilitate harness repair. Probably this is almost never attempted at dealerships, but the parts should be visible in EPC.
You can subscribe to EPC yourself for free and maybe "help out" your parts personnel.
http://epc.startekinfo.com/epc/start.jsp
You can subscribe to EPC yourself for free and maybe "help out" your parts personnel.
http://epc.startekinfo.com/epc/start.jsp
Thread Starter
Senior Member
Joined: Mar 2004
Posts: 264
Likes: 3
From: OKC, OK
2022 GLE 450;
Wow what a great find for parts identification. Thanks.
I looked up section 106 'Horn and Outboard Temperature Indicator' and found the temperature sensor itself (which I have) but it doesn't include any of the other associated pieces. I'll keep looking but would still appreciate hearing from anyone who may have done this repair before.
I looked up section 106 'Horn and Outboard Temperature Indicator' and found the temperature sensor itself (which I have) but it doesn't include any of the other associated pieces. I'll keep looking but would still appreciate hearing from anyone who may have done this repair before.
Thread Starter
Senior Member
Joined: Mar 2004
Posts: 264
Likes: 3
From: OKC, OK
2022 GLE 450;
If you think pics will help, here they are.
The first one is the bare wire where the sensor used to be attached. There are 2 seperate smaller wires wrapped in a protective tape
The 2nd pictue is all of the parts the dealer said it would take to repair. One end of the harness clearly plugs into the actual sensor, the other end is also a plug. I also don't know what to do with the two smaller things next to the harness.
Thanks
The first one is the bare wire where the sensor used to be attached. There are 2 seperate smaller wires wrapped in a protective tape
The 2nd pictue is all of the parts the dealer said it would take to repair. One end of the harness clearly plugs into the actual sensor, the other end is also a plug. I also don't know what to do with the two smaller things next to the harness.
Thanks
MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,852
Likes: 196
From: Huntington Beach, Ca.
'17 Jaguar XF
If you think pics will help, here they are.
The first one is the bare wire where the sensor used to be attached. There are 2 seperate smaller wires wrapped in a protective tape
The 2nd pictue is all of the parts the dealer said it would take to repair. One end of the harness clearly plugs into the actual sensor, the other end is also a plug. I also don't know what to do with the two smaller things next to the harness.
Thanks
The first one is the bare wire where the sensor used to be attached. There are 2 seperate smaller wires wrapped in a protective tape
The 2nd pictue is all of the parts the dealer said it would take to repair. One end of the harness clearly plugs into the actual sensor, the other end is also a plug. I also don't know what to do with the two smaller things next to the harness.
Thanks
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Thread Starter
Senior Member
Joined: Mar 2004
Posts: 264
Likes: 3
From: OKC, OK
2022 GLE 450;
Got impatient and fixed it tonight. Registers normal, nearly accurate temps. Chk engine light still on but lat time I had a chk engine issue on my other car, it went out on its own a few days after the fix and I expect this will do the same.
I gave it a temporary tape up till I replace the front fender liner tomorrow and properly attach it.
Thanks for the help
I gave it a temporary tape up till I replace the front fender liner tomorrow and properly attach it.
Thanks for the help
MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,852
Likes: 196
From: Huntington Beach, Ca.
'17 Jaguar XF
The temp sensor is not in the CEL sequence so if it goes out it's coincidental. Check the code, clear it, and see if it comes back.
Thread Starter
Senior Member
Joined: Mar 2004
Posts: 264
Likes: 3
From: OKC, OK
2022 GLE 450;
Anyway, according to the autozone reader and what MB of Oklahoma City tells me, the CEL was from the ambient air sensor (which was ripped loose). If it stays on more than a few days, I'll run the code again and see if a new code might have developed.
MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,852
Likes: 196
From: Huntington Beach, Ca.
'17 Jaguar XF
Newbie
Joined: Sep 2011
Posts: 1
Likes: 0
'02 C320
OK so I am having a similar issue in that my temperature is showing a constant 185 degrees. I pulled the fender flap off and there is no sign of an ambient sensor. I dont even see where it would plug in. Can you tell me where the other end of the harness would plug in? Thanks.
Newbie
Joined: Jan 2008
Posts: 3
Likes: 0
2008 c300
OK so I am having a similar issue in that my temperature is showing a constant 185 degrees. I pulled the fender flap off and there is no sign of an ambient sensor. I dont even see where it would plug in. Can you tell me where the other end of the harness would plug in? Thanks.
Newbie
Joined: Mar 2012
Posts: 4
Likes: 0
MBZ 2005 C240
temp sensor wiring
Hi I am having same problem except my wires have been cut on oppisite side of engine and harness shown is really short. Does anyone know what gauge of wire I would need to buy to reach all the way over to drivers side where temp sensor plugs into?
Newbie
Joined: Apr 2011
Posts: 2
Likes: 0
c280
I own a 2006 C280.. Same trbl.. I hit pothole.. This seems to have ripped my side marker, fog light, and my temperature sensor wires off.. I ordered a brand-new sensor but I can't find a piece that K'NEX to it.. The dealership tells me to it's a major harness piece.. Can someone please help me out as to what I should do next or where I can go get this fixed..
Newbie
Joined: Aug 2014
Posts: 12
Likes: 0
2008 c63
If you think pics will help, here they are.
The first one is the bare wire where the sensor used to be attached. There are 2 seperate smaller wires wrapped in a protective tape
The 2nd pictue is all of the parts the dealer said it would take to repair. One end of the harness clearly plugs into the actual sensor, the other end is also a plug. I also don't know what to do with the two smaller things next to the harness.
Thanks
The first one is the bare wire where the sensor used to be attached. There are 2 seperate smaller wires wrapped in a protective tape
The 2nd pictue is all of the parts the dealer said it would take to repair. One end of the harness clearly plugs into the actual sensor, the other end is also a plug. I also don't know what to do with the two smaller things next to the harness.
Thanks
Newbie
Joined: Aug 2015
Posts: 1
Likes: 0
Mercedes C230, GMC Acadia AWD
2007 C230 - Also having the ambient air temperature issue. Due to a broken ankle, can't get under there to look at it right now. However, along with this were two other codes. The one that concerns me is cylinder 1 misfire. It seems that all of this happened at the same time, so anyone believe that I have two different problems or is it highly likely that the ambient air sensor is screwing up the engine computer.
Thanks
Thanks
Junior Member
Joined: Feb 2015
Posts: 41
Likes: 0
From: California
04 CLK500 & 10 GLK350 (Past: 83 380SL, 03 C230 Coupe, 2013 C250 Sedan, 97 C280)
So was it A203 540 1733?
This forum aslo helps by the way: https://mbworld.org/forums/clk-class...r-missing.html
