Question about 1998 Mercedes-Benz S-Class
Here is the way to find out pull your spark plug put out and bring each cylinder tdc and put 50 psi air in that cylinder remove radiator cap and check for bubbles do this to all cylinders,if no bubbles I would be checking to see if that engine has a oil cooler that could leak oil into your coolant,some mercededs had oil cooler,
Posted on Sep 30, 2009
Testimonial: "Thank you, will try. I was going to flush out the cooling system a couple time and see if I got oil again."
I have w210 e430 same problem oil in coolant reservoir, but no coolant in engine oil, now that i think about few weeks ago i tried to pulled the wracked car with this e430 and since the wracked car's tires were locked it put way to much load on my e430 that back tires spined on drie concreat, that created inormus transmission oil presure that might have burst oil cooler in radiator. you can do pressure air pressure test of the oil cooler radiator to see if it leaks.
Posted on Feb 23, 2010
Could be a headgasket or even a cracked block...
Posted on Sep 30, 2009
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Posted on Jan 02, 2017
SOURCE: Oil in over coolant tank
since you are running green coolant in a car designed for dexcool that may have contributed to a leaky intake gasket and/or head gasket. dexcool was specially formulated to run in the GM vehicles because the gaskets and seals can be easily distorted when the wrong chemicals are soaking them. oil in the coolant is usually either a head gasket or the lower intake manifold leaking into the cooling system. also if the intake gaskets werent done properly that would cause oil in the coolant as well. i suggest you take your car to a reputable shop and have it tested for a headgasket leak and to have the lower intake inspected.
Posted on Feb 17, 2009
As you've stated driving around town it's fine, and everything is working well. For the symptoms, there are 2 possible causes:
1. Your cooling fans are not working.
2. Your radiator needs to be replaced.
I'm sure you can determine which it is, and I wish you luck on your repair.
Posted on Jun 02, 2009
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