SL-Class (R129) 1990-2002: SL 280, SL 300, SL 320, SL 500, SL 600, SL 60 AMG

SL/R129: ambient temperature sensor

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Old Dec 20, 2011 | 10:48 PM
  #1  
Rocco Vespe's Avatar
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From: southern new jersey
2003 SL500
Unhappy ambient temperature sensor

My ambient temperature guage reads negative 36 degrees F. I just had some body work done on front bumper. What is the problem and is it easy to fix?
RRV 1999 SL500
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Old Dec 21, 2011 | 08:26 AM
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MB-Dude's Avatar
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From: Covington, WA
'96 SL600, '05 S55 AMG, '06 C230
Make sure the temperature probe is in the bumper and wasn't forgotten to be installed. If it's there, check to make sure the cable is connected. If the bumper work was the only work performed, then it should be straight-forward.
Cheers,
Jeff
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Old Dec 21, 2011 | 03:50 PM
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SRHsl600's Avatar
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From: Eastern Kansas
94 SL 600, 98 993, 89 XJS Conv., 85 Daimlier Princess 16 Hybrid Lincoln 16 Chevy crewcab
One of my sensors will read SC for "short circuit" when not connected, not sure it was is a MB! When the SL was reading "not even close" the probe was not in the slates of the lower part of the front bumper cover. I hope the Holiday season is not that cold for New Jersey!
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Old Dec 21, 2011 | 11:12 PM
  #4  
Rocco Vespe's Avatar
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From: southern new jersey
2003 SL500
Angry ambient temperature sensor location?

can anyone tell me where the ambient temperature sensor is located and how to get to it on a 1999 SL500?
RRV
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Old Dec 22, 2011 | 10:20 AM
  #5  
MB-Dude's Avatar
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From: Covington, WA
'96 SL600, '05 S55 AMG, '06 C230
Originally Posted by Rocco Vespe
can anyone tell me where the ambient temperature sensor is located and how to get to it on a 1999 SL500?
RRV
Front bumper, left side, usually barely sticking out of the slotted section. I'd take a picture of mine, but the probe is black and so is my bumper; sort of hard to see. Look for a little stub, about half the diameter of a pencil. If you look carefully, it'll be noticeable as it'll be the only small, stubby item pointing forward. You may need to follow the cable back to the connector, which if memory serves, is not too long.

Cheers,
Jeff
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