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#1
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Temp gauge -- works...sometimes. Why?
94 C280 with only 51k miles. I've had it for 6 months with no problems -- it is in great shape.
It is pretty cold the last 2-3 weeks (30ish) and I have an odd problem. Sometimes my temp gauge works and sometimes it doesn't. It will typically be pegged at the bottom. Most of the time at some point in the ride it will suddenly rise up to where it should be. At that point it stays active until the problem reoccurs at a later starting. 1. I have no heater problems (stuck thermostat -- heat works perfectly). 2. I have no engine overheating problems. It never runs hot, and never is at any higher temp than normal when it does decide to work. 3. Coolant is at the proper mix for winter. Any thoughts or suggestions?
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1994 C280, dark green metallic 105k miles 1991 190E 2.6, Black 191,500 miles (sold to another forum member) 2003 Chevy Tahoe LT, Redfire Metallic 105k miles 1989 Mustang GT Cobra Convertible 43k miles |
#2
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Needle sticking to its stop PEG. Try tapping on the top of the dash next time it doesn't move properly.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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Oh, I've banged away. Didn't help.
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1994 C280, dark green metallic 105k miles 1991 190E 2.6, Black 191,500 miles (sold to another forum member) 2003 Chevy Tahoe LT, Redfire Metallic 105k miles 1989 Mustang GT Cobra Convertible 43k miles |
#4
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Quote:
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2007 C 230 Sport. |
#5
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Is it seperatly fused? (-not my model or year range-) Intermitant bad contact.?.?
I couldn't find a coolant temp sensor for this car. What kind does it use?
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-Marty 1986 300E 220,000 miles+ transmission impossible (Now waiting under a bridge in order to become one) Reading your M103 duty cycle: http://www.peachparts.com/shopforum/831799-post13.html http://www.peachparts.com/shopforum/831807-post14.html |
#6
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Quote:
I'm pretty sure it isn't the gauge and I know the actual thermostat and coolant system is fine.
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1994 C280, dark green metallic 105k miles 1991 190E 2.6, Black 191,500 miles (sold to another forum member) 2003 Chevy Tahoe LT, Redfire Metallic 105k miles 1989 Mustang GT Cobra Convertible 43k miles |
#7
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Just take the sensor wire off and ground it to see if guage responds.
or take an ohm reading of the sensor. http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1M30LAGSC1OH0OZIIL&year=1994&make=MB&model=C-280-001&category=P&part=Water+Temperature+Sender 60C-110 ohm 80C-67 " 100C- 38 " |
#8
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Quote:
If the gauge shows no reading, and I take the sensor wire off and ground it...are you saying I should see some sort of reading? If I did, then you are saying the sensor is bad? Thanks,
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1994 C280, dark green metallic 105k miles 1991 190E 2.6, Black 191,500 miles (sold to another forum member) 2003 Chevy Tahoe LT, Redfire Metallic 105k miles 1989 Mustang GT Cobra Convertible 43k miles |
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