My temp. guage - Mercedes-Benz Forum
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post #1 of 58 (permalink) Old 06-07-2019, 05:01 PM Thread Starter
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Vehicle: E240 w210 year 2000 v6 2398 c.c ps/kw:170/125
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My 2000 E240 W210 with 180K miles is always running 3/4 way on the temperature gauge. Is that normal? Esp for now im at dubai very hot weather when im at germany it slightly over 80 ..i've checked the fan clutch and the coolant and the thermostat , all looks great no issues at all ...whats wrong? all that i 'm afraid from using AC due to overheating gauge..waiting ur advice guys ..thanks
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post #2 of 58 (permalink) Old 06-07-2019, 07:32 PM Thread Starter
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My tempture guage ?

My car E240, am learning about this car. 2000 E240s have an electric radiator cooling fan behind the radiator. No clutch drive fans on these cars. No aux fans in front of the radiator on this car.*

Much like others on this thread, I noticed the following about the engine temperature:
- While moving in town or on the highway, AC off: ~85-87 degC exactly.
- Idling / stuck in traffic, AC off: ~95-97 degC. Cooling fan runs, but the fan speed seems very slow - like 2 revs per second. If I turn on the AC, fan runs higher, but I wouldn't say that it's fast; engine temp stays at 95deg C. Ambeint temps are around 70F - very mild.*

I don't particularly like it idling at 95-97 deg C on such a mild day (what happens when it gets 110F here stuck in traffic, as it does sometimes....) I found another post on thermostats which shows photos of instruments at highway speed and at idle, all right at 85deg C, consistently. My toyotas only vary over maybe a 3 or 4 degree span, not 10-12 degC span.*

I changed the thermostat - identical behavior - no change.*

Question: how do I CONFIRM whether the fan is running at the right speed? Many vague posts, but there must be a way to test voltage vs. speed or voltage into a regulator vs. voltage to fan or something?*

Any advice would be most welcome - Thanks!
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post #3 of 58 (permalink) Old 06-07-2019, 07:58 PM
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Those temperatures are not alarming, but on high side.
Check stickies for fan test using climatronic.
What color is your coolant? When MB coolant is top-end, members using other coolants on aging cars do report overheating problems.


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post #4 of 58 (permalink) Old 06-07-2019, 08:02 PM Thread Starter
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Its MB coolant its blue green or turquoise ,i think the top end coolants are BMW and MB , to test fan speed using climatronic ,how that?
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post #5 of 58 (permalink) Old 06-07-2019, 08:11 PM Thread Starter
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Without AC ? i think with AC on and high speed it ll be blown out 😫😫 , needing your urgent advice guys
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post #6 of 58 (permalink) Old 06-07-2019, 09:40 PM
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Quote:
Originally Posted by Kajtek1 View Post
Check stickies for fan test using climatronic.
Quote:
Originally Posted by Danial View Post
to test fan speed using climatronic ,how that?
Kajtek1 please correct me if I am wrong, I'm learning:

To test fan functionality, do we look at item 20 here?

STAR TekInfo

If so, what is correct? For example, I got a reading of "3.2" for item 20. Is that right?

I got the info from the sticky but also from another thread recently (as you may recall).

TIA.
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post #7 of 58 (permalink) Old 06-07-2019, 11:14 PM
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I sold last W210 few years ago, so there might be memory lapse, but I remember that pushing both "AUTO" activated the fan on high.
Once you have the fan on high, you will hear it with open window.


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post #8 of 58 (permalink) Old 06-07-2019, 11:29 PM
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On my 1998, pushing both AUTO does *NOT* engage the electric fans. I wonder whether that is because fans are actually malfunctioning or if the instructions are for later models, like OP's.
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post #9 of 58 (permalink) Old 06-07-2019, 11:53 PM
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Both of my 97 and 98 do engage the aux fan to 100% with both auto pressed for 10 seconds.

--1998 MB E300TD 291k
--1997 MB E36 Frankenstein'd AMG 199k
--2011 Suzuki DL650 58k
--1997 MB E320 161k. SOLD...loved that stupid car.
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post #10 of 58 (permalink) Old 06-08-2019, 12:40 AM
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My temp. guage

Thanks Deplore! Is the engine ON during the test?

EDIT: tried it with engine on or off, and also tried it in diagnostic mode: NO FANS.

I wonder if OP can replicate this behaviour and if itís a problem?
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