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  #1  
Old 10-06-2004, 05:06 PM
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Is my 190E running too hot?

My 1992 190E 2.3 seems to be running too hot.

When I first start it, or when I'm trying a constant speed such as on the highway, it's usually close to 80 or 85 celcius.

However, when I start to go through traffic, or stop signs, or red lights, and I stop and go even a little bit, it starts to run at 95 to 105 celcius.

Is this normal? If not, what should I do?

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  #2  
Old 10-06-2004, 05:35 PM
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I dont quite know how to break this to you but.....
...your 190e is running fairly normally!

I don't like the fact the gauge rises so damned quickly but apparently is something to do with the way Mercedes designed the sensor system. It reacts very quickly so creating needless Fear, Uncertainty and Doubt!

You may want to check the cooling operation but if it reaches a point and goes no higher it proberly okay.

Mike.
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Old 10-06-2004, 07:38 PM
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Well that's good news, I guess.

There's one other problem I noticed.

When I'm driving, the "coolant low" light will come on randomly for about 10-15 seconds, then turn back off.

This only happens about once or twice per day (if even). But it turns off in a matter of seconds. The coolant level seems to be fine.

What's up with that?
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  #4  
Old 10-06-2004, 08:12 PM
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Location: Evansville, Indiana
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No, this isn't normal. You may reach 100 or so in slow traffic on a hot day with the AC on, but if it happens all the time you need a new visco clutch, it's not spinning the fan up at all.

The flickering coolant light can be two things -- bad sensor (check for coolant on it outside the tank) or a bad radiator cap that won't hold pressure. This means the coolant is boiling and the bubbles cause the sensor too come on, it's just a float.

Get a new visco clutch, new radiator cap, and flush the cooling system and install fresh MB or Xerex G-05 coolant (ONLY, do NOT use the green stuff, it eats radiators on these cars).

If the above doesn't fix things, take is somewhere and have it pressure tested. A slow leak at the water pump will do the same thing, as the coolant won't pressurize.

If it holds pressure and the water pump is OK, likely the radiator is clogging.

Peter
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  #5  
Old 10-06-2004, 09:42 PM
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A 190E is normal at that temp range. The clutch fan only turns on at 100 degrees and at idle it is not doing much cooling. I actually wired my aux fan to turn on instead since it coold a bit quicker. Check out the 190revolution.net forum. Since we all have 190's over there, there is a lot more input from guys with the same car. I know my C230 does not ever get that warm but the 190 is in perfect cooling shape and it has done that from day one. They are known to have smaller radiators so they warm up faster to meet emmissions standards in the US at the time. MB's maint CD also states that these temps are within spec. Mine needs a new radiator but it still does not overheat and never goes over 110 on my gauge. My gauge is actually 5-10 degrees over, I replaced it and it does not read properly but the fuel gauge is better than the original so I keep it in there and just remember it is off. My fans according to the gauge come on at 110, actually 100 and never go higher. But that is because I use the aux electric fan instead of that useless at idle clutch version. As long as when the temp hits between 100 and 105 you have the fan clutch engage then you should be fine. These engine according to MB will not get damaged unless they go over 120!

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