1998 C280 Coolant Disapearing & Oil HI Message - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 01-16-2012, 11:56 PM Thread Starter
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Date registered: Jan 2012
Vehicle: 1998 C280
Location: Oahu, Hawaii
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Smile 1998 C280 Coolant Disapearing & Oil HI Message

Hi All,
New to this site and the world of Mercedes-Benz. I thought I was pretty lucky to find a pristine 1998 C280 with only 23k miles. Carfax checked out and all maintenance was done by the dealer every year. After a few hundred miles, the coolant light went on. I topped off the coolant although it just seems to be disapearing, no leaks and all hoses look like they are in order. Now the "Hi Oil" message in the odometer shows up when driving around. Checked the dipstick and oil is in proper order with no "milky" color. The car is going to the repair shop, although was wondering if anyone else experienced this and what the cause/problem may be. Any feedback is greatly appreciated! Love the car and just hope this isn't too much of a problem. Thank you!
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post #2 of 3 (permalink) Old 01-17-2012, 07:44 AM
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Date registered: Sep 2006
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Calypso - welcome to the forum, and congrats on finding this car. In a barn?

Would you please add your profile to your posts by going to User CP ^^ as model, year, and location can often help replies here. Also it is better to post your queries in your your own model forum (W202) as listed on the Index page. That's where owners of similar cars will hang out.

About your problems - I'm not convinced that they are connected, after the basic checks you have done. The high oil warning might just be a faullty sensor, if your dipstick disagrees with the alarm.

Regarding the loss of your coolant, it could be weeping from your water pump while the engine is running, and the minute drops get thrown everywhere. So you may find no evidence of this leak. A 'pressure test' on the radiator or coolant header cap will show if this is your problem.

Of course on a 14 y/o car other coolant hoses might have small cracks that leak slightly when under working pressure. It might be an idea to change them all.
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post #3 of 3 (permalink) Old 02-09-2012, 11:47 PM Thread Starter
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Date registered: Jan 2012
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Thanks! A Much Bigger Problem Than Expected...

Hi Keyhole,

Thanks for your reply! Sorry been so busy with work and the C280 has been in the shop during this time. The mechanic (a highly regarded and recommended MB mechanic) notified me that my Head Gasket was leaking and coolant was leaking into in the engine oil. I guess when I checked it wasn't mixed like the "milky" fluid. Also, explains my "hi Oil" light...Looks like I"ll be looking at around $3700 in repairs. (Ouch!). But at least the mechanic said everything else is in great shape and he said that after fixing this problem I'll have a superb vehicle. Never imagined repairs for this vehicle could cost so much, but then again, its far superior to the Lexus and Infiniti's I've been driving.

Yes, the car was almost in a barn, it was in a garage of the owner who hardly ever drove it, except to the grocery store. I couldn't resist buying it when I found it. Immaculate in every way, even the mechanic couldn't believe the condition for the year.

Thanks again, I'm looking forward to getting my car back soon and can't wait to start enjoying it.
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