I recently purchased a w203 and today decided to change the oil for the first time. Lo and behold it appears as though either the c320 has no oil drain plug or mine has disappeared. Is there any way I am looking in the wrong place. I've got eight gallons of the preferred oil along with the correct filter sitting in my garage. Help!!

 

no help at all? Sorry I wasted my time

 

Take a look at this oil pan https://i.ebayimg.com/images/g/z0QAA...TCW/s-l640.jpg You can see the drain plug in the top right.
It is farther back then you think near the cats if memory serves me right.

 

I also couldnt find the oil plug so I just bought this to do oil changes

 

It's there. You just have to remove the plastic under cover and you will find it.
Then again, you can use the pump through the dipstick method.