Hi my mother has a 2000 mb c230 with 70000 miles and its having some problems. Yesterday it didn't really have much oil in it so she put in a quart and she pretty much drove all day with it. This morning I tried to start the car and the engine knocks really hard and then shuts off as soon as I take my foot off the gas. I checked the oil and there was no oil in the car. So I put 3 quarts in and it still has the same problem. There wasnt any leakage while I was running the engine with oil in it. Does anyone know what seems to be broken? thank you

Looks like its not maintained. Why is there little oil?

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99 C43
98 S420
99 C230K
01 C240

1st the car takes nearly six quarts.

also there is a shield under the engine that may be holding any leaking oil - but I kind of doubt that.

I know on my older nissan if the engine temp registered too high the car would cut off.

does the car have a full tank of gas?

and did you fill the oil up to the fill mark on the dip stick?