Exterior temperature sensor CL65
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Senior Member
Joined: Aug 2003
Posts: 321
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From: Malaysia
CL65 AMG '05
Exterior temperature sensor CL65
Something is odd for my new car, seems to me that the exterior temperature sensor is rather erratic. I believe it is because this car's engine produce way too much heat. When the car is left idea, the ext temp sensor which i believe is located under the front bumper rises its temperature from 31c to 45c! at times. It must be reading the enjine bay temperature instead of the outside temperature. Any way experience this? Malaysia whether is around 28c to 32c average. So 45c is just plain ridiculous.
Is the enjine's heat suppose to do this do the ext temp sensor? I'm just bothered by it.
Is the enjine's heat suppose to do this do the ext temp sensor? I'm just bothered by it.
Super Member
Joined: Dec 2004
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From: Boston
NSX
That engine makes a lot of heat. I think unless you are moving and air is flowing past, you will get an errant reading. But I think you have other things to worry about like whose *** you are going to kick at the next stoplight, or which woman you are going to take out in it tomorrow. Temp sensor would be my last worry.
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Joined: Feb 2004
Posts: 263
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From: Bay Area
e55211 traded in for CLS55
Originally Posted by James L.
Something is odd for my new car, seems to me that the exterior temperature sensor is rather erratic. I believe it is because this car's engine produce way too much heat. When the car is left idea, the ext temp sensor which i believe is located under the front bumper rises its temperature from 31c to 45c! at times. It must be reading the enjine bay temperature instead of the outside temperature. Any way experience this? Malaysia whether is around 28c to 32c average. So 45c is just plain ridiculous.
Is the enjine's heat suppose to do this do the ext temp sensor? I'm just bothered by it.
Is the enjine's heat suppose to do this do the ext temp sensor? I'm just bothered by it.
Junior Member
Joined: Feb 2004
Posts: 31
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2009 E550 w P1, Flint Black
Originally Posted by James L.
Something is odd for my new car, seems to me that the exterior temperature sensor is rather erratic. I believe it is because this car's engine produce way too much heat. When the car is left idea, the ext temp sensor which i believe is located under the front bumper rises its temperature from 31c to 45c! at times. It must be reading the enjine bay temperature instead of the outside temperature. Any way experience this? Malaysia whether is around 28c to 32c average. So 45c is just plain ridiculous.
Is the enjine's heat suppose to do this do the ext temp sensor? I'm just bothered by it.
Is the enjine's heat suppose to do this do the ext temp sensor? I'm just bothered by it.
Please tell me this is all a joke and you really understand how your car operates.
Member
Joined: Feb 2005
Posts: 229
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From: New York
Spyker C8, MB ML63 AMG, land rover
Originally Posted by James L.
Something is odd for my new car, seems to me that the exterior temperature sensor is rather erratic. I believe it is because this car's engine produce way too much heat. When the car is left idea, the ext temp sensor which i believe is located under the front bumper rises its temperature from 31c to 45c! at times. It must be reading the enjine bay temperature instead of the outside temperature. Any way experience this? Malaysia whether is around 28c to 32c average. So 45c is just plain ridiculous.
Is the enjine's heat suppose to do this do the ext temp sensor? I'm just bothered by it.
Is the enjine's heat suppose to do this do the ext temp sensor? I'm just bothered by it.
Thread Starter
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Joined: Aug 2003
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From: Malaysia
CL65 AMG '05
Originally Posted by AMG2GO
That engine makes a lot of heat. I think unless you are moving and air is flowing past, you will get an errant reading. But I think you have other things to worry about like whose *** you are going to kick at the next stoplight, or which woman you are going to take out in it tomorrow. Temp sensor would be my last worry.
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From: Malaysia
CL65 AMG '05
Originally Posted by MVD
Dude, are you familiar with even the most basic concepts of physics? Let's see... You make a grocery run. The engine throws off some heat. The engine bay is covered (ie, insulated) and retains heat. When you get back in the car, the thermocouple (ie, thermometer) reads 45C. And you are surprised (ie, bothered) by this? You're kidding, right?
Please tell me this is all a joke and you really understand how your car operates.
Please tell me this is all a joke and you really understand how your car operates.
Now I wonder if repositioning would help my case. My other cars never had those problems, temp sensors has always been great. I really read those things a lot since Malaysia is really hot. temp range from 27c to 33c. And 27c for us is considere a very cold nice whether. So we do tend to read it at times. And what do you see? 45c? Doesn't that annoys you? lol
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Thread Starter
Senior Member
Joined: Aug 2003
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From: Malaysia
CL65 AMG '05
Thanks guys for the info. Now I know i'm not the only one. I was told by someone here that the temp sensor is under the front bumper. Now i wonder if I reposition it to the middle or rear, perhaps that will give a much better reading.
I felt like a bit of postwhore recently :p
I felt like a bit of postwhore recently :p
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From: Malaysia
CL65 AMG '05
Originally Posted by ricky.agrawal
If I was on a computer forum, I'd beat you 
I was going to say... 60C is when you should really start worrying..
I was going to say... 60C is when you should really start worrying..
ShuttleX rocks!!!
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From: Malaysia
CL65 AMG '05
I just notice you're at a freaking nuts 16,000 post! Wtf are you? Some super *****? lol! How the hell did you get so high? DAMN! And you're a 17 yrs old lil bxtch to do that! lol, meant as a joke mate, dont take it serious!
And you're a 17 yrs old lil bxtch to do that! lol, meant as a joke mate, dont take it serious!
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Joined: Mar 2005
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From: San Diego, CA
2004 E55
I'm not clear if you mean that while driving in traffic it shoots up, or if you park and come back it reads higher.
On my E55 it fell out of its sensor, and was reading the engine temp (115* at midnight?). When it went in for its 1000mi service they just plugged it back in.
On my E55 it fell out of its sensor, and was reading the engine temp (115* at midnight?). When it went in for its 1000mi service they just plugged it back in.
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From: Malaysia
CL65 AMG '05
Originally Posted by MikaelSS
I'm not clear if you mean that while driving in traffic it shoots up, or if you park and come back it reads higher.
On my E55 it fell out of its sensor, and was reading the engine temp (115* at midnight?). When it went in for its 1000mi service they just plugged it back in.
On my E55 it fell out of its sensor, and was reading the engine temp (115* at midnight?). When it went in for its 1000mi service they just plugged it back in.
Super Member
Joined: May 2004
Posts: 755
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From: USA
LS7 powered Corvette
Originally Posted by James L.
Wow that might be what happens to mine too. I might get my car in soon someday to get it check. The highest temperature i recorded so far is in an enclosed service station which shoots to 57c!!! And it average at 38c to 44c in very hot days. But when the car starts moving fast around 120km/h the plunge very fast down to 34.5 on avg. I am sure the position of the sensor is very wrong. Its just annoying to see false temperature outside.
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From: Malaysia
CL65 AMG '05
I totally agree with you. Just park the car stationary with the enjine turn on will feel the heat coming from the side undercarriage of the car. It is really hot. Btw I have not had time to go into my dealer recently, have not talk to them about the temp sensors. You mentioned the lower mesh grill on the left side, I can't really find it, how does it look like? Do I have to go under the car?
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Joined: Apr 2005
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From: White Lake, MI
04 C320 Coupe MT
It can be pretty common for the temp sensor to fall out of it's holder and then give false readings. This is especially true with the AMG bumpers, because they have a metal grille with a rubber grommet and it just doesn't seem to hold it in as well as the standard bumpers that have a hard plastic holder.
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From: Malaysia
CL65 AMG '05
Darn it, i keep looking for it but just couldn't find the sensor. Its at the left side of the car (looking from behind) under the front meh between the two foglights? I see nothing! It is mounted to the upper bumper or lower bumper pillars?
