Okay got the check engine light on my 98 ML 320. It is the EGR valve. So I pull it to clean it. In taking the intake hoses off to get to it I noticed a good bit of oil in the breather tube coming from the driver side of the engine. None in the tube from the passenger side. Is there a PCV valve or something in there that could be stuck open allowing oil to get sucked into the intake? Recently this engine has started using oil but the only thing is it only uses it if you drive a long distance at Highway speed 75+. Now in normal round town driving it will hardly use any oil in a 1k miles. But a trip from Atlanta to Nashville will use almost a quart. That does not seem like the ring coking issue. In my experience bad rings makes one use oil all the time. My guess is oil getting in thru the breather tube but I don't know how to stop it. I can't see anything that looks like a valve.

On a side note when I pulled the EGR the tube was almost completely blocked. Cleaned it made sure the valve plunger was free. Put everything back and cleared the code. But it came back about 3 days later. I now have a new EGR valve to put in this weekend if I can get the oil breather issue fixed I would like to do that as well while I have everything apart.

Thanks,