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#1
08-10-2007, 06:13 PM
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Instrument cluster lit up, then car overheated...
Hey everyone. I need some help with this one, car is a 1992 m103 300E. I was driving home today and at a stop I noticed that my ABS light blipped on. I was stationary when it turned on so I grew a little concerned. Less than a minute later, when I was rolling again, most of the warning lamps on the cluster illuminated, but not fully, only a dim glow. The temperature needle quickly started moving towards 120 so I pulled into a parking lot and walked home. After letting it cool I came back, topped off the coolant (it was only a little low, I assume a bit boiled off through the overflow drain) and drove it home no problem. Does anyone have any ideas on the problem? I did notice the battery terminals were a bit loose and I have tightened those.
Other issues I have been having that may help in diagnosing the problem: -Cruise control intermittently stops working, sometimes when it does work it will deviate more than normal from the desired speed or will be slow to engage. -Engine sounds strange, instead of a constant hum at idle there are discrete sound events, more like a quickly idling motorcycle. The car was running rich and this sound appeared after my tech changed the fuel/air ratio. -Intermittent hum (louder and higher frequency than usual) coming from the fuel pump area. Using a stethoscope I tracked it down to the fuel screen, but after a cleaning the sound is still there. -Belt shredding as documented in a previous post. Last edited by Badinfo; 08-10-2007 at 06:52 PM. 
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#2
08-10-2007, 06:54 PM
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What year and model is your car and what is the milage?
At first thought, I would say your cruise control issue is not related and it is due to the typical cruise control amp circuit board issues. It likely needs either replaced or the terminals resoldered to fix the cruise gremlins that are common. Overheating....lots of possibilities and culprits. Lots.
__________________
Christopher Henkel 1990 190E 2.6 - Arctic white SOLD 1986 190E-16v - Blauswartze 1993 300CE - SOLD 2003 W208 CLK 320 Cabriolet - Magma Red
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#3
08-10-2007, 07:48 PM
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Its a 92 300E with 153,200 miles. The overheating seems to be related to the instrument cluster lighting up, as the car is running fine for now. I have replaced several of the cooling hoses recently (they all seem to be developing holes) and the car does not seem to be leaking any fluids. The water pump is moving coolant as well (for the time being). I agree that the cruise control issue is probably not related, but I figured a more complete picture would help to track down the problem.
Last edited by Badinfo; 08-10-2007 at 07:54 PM.
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#4
08-10-2007, 08:16 PM
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Yes, the complete picture is good, you did right by mentioning everything.
I would say the instrument lights are a symptom of the problem. They typically come all on and dim when you lose a belt, or the alternator and the battery is bleeding down in voltage. Remember, a slipping belt from being wet, lose, or misaligned can cause the alternator not to turn or lose voltage just as easy as a broken or slipped belt, then later it can work again just fine, until next time...
__________________
Christopher Henkel 1990 190E 2.6 - Arctic white SOLD 1986 190E-16v - Blauswartze 1993 300CE - SOLD 2003 W208 CLK 320 Cabriolet - Magma Red
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#5
08-11-2007, 01:00 AM
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It sounds to me like you lost the ground to the instrument cluster, a not uncommon problem. I suspect that ALL of your symptoms are bogus, and caused by the bad ground.
__________________
Richard Wooldridge '01 ML320 '82 300D 4.3L V6/T700R4 conversion '82 380SL, '86 560SL engine/trans. installed '79 450SL, digital servo update '75 280C
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