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Old 09-14-1999, 11:26 PM
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I have a new 1999 E320 that rattles after start up. I assume its the hydralic valve train doing the rattleing, and is this normal? I drive the car on long trips, and it sits a few weeks at times before it driven. When started , it rattlesw a few seconds and then quiets down. Still this engine is a little clickie in the valve train even at that. Once you start it, it's fine until it sits a week or so. Any ML320 or E320 drivers noting this problem (if it really is ine at all)?

Old 09-15-1999, 02:34 PM
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Join Date: Jul 1999
Location: Youngstown, OH
Posts: 150
Are you using non-MB oil filters? OEM filters have a check valve to prevent the oil from draining out of the filter when the engine isn't running.

Old 09-15-1999, 08:21 PM
Posts: n/a
I haven't so much as touched the engine compartment. Its totally stock. I plan to install a K&N oiled filter as soon as one is available. It's out for the ML320 (pass it along) and I'm told end of November for the E320.

The rattle isn't "bad" but its always done it after it sits awhile and is started. Since this engine is modular, have the V8 versions been doing this? No engine I've ever had has done this no matter how long it sits. If it's just the hydrolics pumping up, it may be no more than a start up noise "characteristic". But, if it is indeed a problem that will lead to engine problems later on I'd like to get the problem fixed. As well as the engine runs, I can't believe it a major issue...yet. Have about 8,000 miles on the car. It could be as simple as a stuck valve on the oil filter.

I'm going to have Mobile one synthetic oil installed with the standard 10W30 viscosity rating. And, I'll use a MB filter for this car. With the service intervals as long as they are, I can't see saving a few dollars on a critical part.

Thank you for your response.
Old 09-15-1999, 08:42 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
On the early M112 engines there was some hydraulic lifter noises. M.B. says the use of synthetic oil in these engines can cause even more lifter noise.

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